The Tor Browser: toolkit/crashreporter/google-breakpad/src/processor/minidump.cc@6474c204b198 (annotated)

toolkit/crashreporter/google-breakpad/src/processor/minidump.cc@6474c204b198 (annotated)

toolkit/crashreporter/google-breakpad/src/processor/minidump.cc

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rwxr-xr-x

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 // Copyright (c) 2010 Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 // minidump.cc: A minidump reader.
 //
 // See minidump.h for documentation.
 //
 // Author: Mark Mentovai
 #include "google_breakpad/processor/minidump.h"
 #include <assert.h>
 #include <fcntl.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <string.h>
 #include <time.h>
 #ifdef _WIN32
 #include <io.h>
 #define PRIx64 "llx"
 #define PRIx32 "lx"
 #define snprintf _snprintf
 #else  // _WIN32
 #include <unistd.h>
 #define O_BINARY 0
 #endif  // _WIN32
 #include <fstream>
 #include <iostream>
 #include <limits>
 #include <map>
 #include <vector>
 #include "processor/range_map-inl.h"
 #include "common/scoped_ptr.h"
 #include "processor/basic_code_module.h"
 #include "processor/basic_code_modules.h"
 #include "common/logging.h"
 namespace google_breakpad {
 using std::istream;
 using std::ifstream;
 using std::numeric_limits;
 using std::vector;
 //
 // Swapping routines
 //
 // Inlining these doesn't increase code size significantly, and it saves
 // a whole lot of unnecessary jumping back and forth.
 //
 // Swapping an 8-bit quantity is a no-op.  This function is only provided
 // to account for certain templatized operations that require swapping for
 // wider types but handle uint8_t too
 // (MinidumpMemoryRegion::GetMemoryAtAddressInternal).
 static inline void Swap(uint8_t* value) {
 }
 // Optimization: don't need to AND the furthest right shift, because we're
 // shifting an unsigned quantity.  The standard requires zero-filling in this
 // case.  If the quantities were signed, a bitmask whould be needed for this
 // right shift to avoid an arithmetic shift (which retains the sign bit).
 // The furthest left shift never needs to be ANDed bitmask.
 static inline void Swap(uint16_t* value) {
   *value = (*value >> 8) |
            (*value << 8);
 }
 static inline void Swap(uint32_t* value) {
   *value =  (*value >> 24) |
            ((*value >> 8)  & 0x0000ff00) |
            ((*value << 8)  & 0x00ff0000) |
             (*value << 24);
 }
 static inline void Swap(uint64_t* value) {
   uint32_t* value32 = reinterpret_cast<uint32_t*>(value);
   Swap(&value32[0]);
   Swap(&value32[1]);
   uint32_t temp = value32[0];
   value32[0] = value32[1];
   value32[1] = temp;
 }
 // Given a pointer to a 128-bit int in the minidump data, set the "low"
 // and "high" fields appropriately.
 static void Normalize128(uint128_struct* value, bool is_big_endian) {
   // The struct format is [high, low], so if the format is big-endian,
   // the most significant bytes will already be in the high field.
   if (!is_big_endian) {
     uint64_t temp = value->low;
     value->low = value->high;
     value->high = temp;
   }
 }
 // This just swaps each int64 half of the 128-bit value.
 // The value should also be normalized by calling Normalize128().
 static void Swap(uint128_struct* value) {
   Swap(&value->low);
   Swap(&value->high);
 }
 static inline void Swap(MDLocationDescriptor* location_descriptor) {
   Swap(&location_descriptor->data_size);
   Swap(&location_descriptor->rva);
 }
 static inline void Swap(MDMemoryDescriptor* memory_descriptor) {
   Swap(&memory_descriptor->start_of_memory_range);
   Swap(&memory_descriptor->memory);
 }
 static inline void Swap(MDGUID* guid) {
   Swap(&guid->data1);
   Swap(&guid->data2);
   Swap(&guid->data3);
   // Don't swap guid->data4[] because it contains 8-bit quantities.
 }
 //
 // Character conversion routines
 //
 // Standard wide-character conversion routines depend on the system's own
 // idea of what width a wide character should be: some use 16 bits, and
 // some use 32 bits.  For the purposes of a minidump, wide strings are
 // always represented with 16-bit UTF-16 chracters.  iconv isn't available
 // everywhere, and its interface varies where it is available.  iconv also
 // deals purely with char* pointers, so in addition to considering the swap
 // parameter, a converter that uses iconv would also need to take the host
 // CPU's endianness into consideration.  It doesn't seems worth the trouble
 // of making it a dependency when we don't care about anything but UTF-16.
 static string* UTF16ToUTF8(const vector<uint16_t>& in,
                            bool                     swap) {
   scoped_ptr<string> out(new string());
   // Set the string's initial capacity to the number of UTF-16 characters,
   // because the UTF-8 representation will always be at least this long.
   // If the UTF-8 representation is longer, the string will grow dynamically.
   out->reserve(in.size());
   for (vector<uint16_t>::const_iterator iterator = in.begin();
        iterator != in.end();
        ++iterator) {
     // Get a 16-bit value from the input
     uint16_t in_word = *iterator;
     if (swap)
       Swap(&in_word);
     // Convert the input value (in_word) into a Unicode code point (unichar).
     uint32_t unichar;
     if (in_word >= 0xdc00 && in_word <= 0xdcff) {
       BPLOG(ERROR) << "UTF16ToUTF8 found low surrogate " <<
                       HexString(in_word) << " without high";
       return NULL;
     } else if (in_word >= 0xd800 && in_word <= 0xdbff) {
       // High surrogate.
       unichar = (in_word - 0xd7c0) << 10;
       if (++iterator == in.end()) {
         BPLOG(ERROR) << "UTF16ToUTF8 found high surrogate " <<
                         HexString(in_word) << " at end of string";
         return NULL;
       }
       uint32_t high_word = in_word;
       in_word = *iterator;
       if (in_word < 0xdc00 || in_word > 0xdcff) {
         BPLOG(ERROR) << "UTF16ToUTF8 found high surrogate " <<
                         HexString(high_word) << " without low " <<
                         HexString(in_word);
         return NULL;
       }
       unichar |= in_word & 0x03ff;
     } else {
       // The ordinary case, a single non-surrogate Unicode character encoded
       // as a single 16-bit value.
       unichar = in_word;
     }
     // Convert the Unicode code point (unichar) into its UTF-8 representation,
     // appending it to the out string.
     if (unichar < 0x80) {
       (*out) += unichar;
     } else if (unichar < 0x800) {
       (*out) += 0xc0 | (unichar >> 6);
       (*out) += 0x80 | (unichar & 0x3f);
     } else if (unichar < 0x10000) {
       (*out) += 0xe0 | (unichar >> 12);
       (*out) += 0x80 | ((unichar >> 6) & 0x3f);
       (*out) += 0x80 | (unichar & 0x3f);
     } else if (unichar < 0x200000) {
       (*out) += 0xf0 | (unichar >> 18);
       (*out) += 0x80 | ((unichar >> 12) & 0x3f);
       (*out) += 0x80 | ((unichar >> 6) & 0x3f);
       (*out) += 0x80 | (unichar & 0x3f);
     } else {
       BPLOG(ERROR) << "UTF16ToUTF8 cannot represent high value " <<
                       HexString(unichar) << " in UTF-8";
       return NULL;
     }
   }
   return out.release();
 }
 // Return the smaller of the number of code units in the UTF-16 string,
 // not including the terminating null word, or maxlen.
 static size_t UTF16codeunits(const uint16_t *string, size_t maxlen) {
   size_t count = 0;
   while (count < maxlen && string[count] != 0)
     count++;
   return count;
 }
 //
 // MinidumpObject
 //
 MinidumpObject::MinidumpObject(Minidump* minidump)
     : minidump_(minidump),
       valid_(false) {
 }
 //
 // MinidumpStream
 //
 MinidumpStream::MinidumpStream(Minidump* minidump)
     : MinidumpObject(minidump) {
 }
 //
 // MinidumpContext
 //
 MinidumpContext::MinidumpContext(Minidump* minidump)
     : MinidumpStream(minidump),
       context_(),
       context_flags_(0) {
 }
 MinidumpContext::~MinidumpContext() {
   FreeContext();
 }
 bool MinidumpContext::Read(uint32_t expected_size) {
   valid_ = false;
   FreeContext();
   // First, figure out what type of CPU this context structure is for.
   // For some reason, the AMD64 Context doesn't have context_flags
   // at the beginning of the structure, so special case it here.
   if (expected_size == sizeof(MDRawContextAMD64)) {
     BPLOG(INFO) << "MinidumpContext: looks like AMD64 context";
     scoped_ptr<MDRawContextAMD64> context_amd64(new MDRawContextAMD64());
     if (!minidump_->ReadBytes(context_amd64.get(),
                               sizeof(MDRawContextAMD64))) {
       BPLOG(ERROR) << "MinidumpContext could not read amd64 context";
       return false;
     }
     if (minidump_->swap())
       Swap(&context_amd64->context_flags);
     uint32_t cpu_type = context_amd64->context_flags & MD_CONTEXT_CPU_MASK;
     if (cpu_type == 0) {
       if (minidump_->GetContextCPUFlagsFromSystemInfo(&cpu_type)) {
         context_amd64->context_flags |= cpu_type;
       } else {
         BPLOG(ERROR) << "Failed to preserve the current stream position";
         return false;
       }
     }
     if (cpu_type != MD_CONTEXT_AMD64) {
       //TODO: fall through to switch below?
       // need a Tell method to be able to SeekSet back to beginning
       // http://code.google.com/p/google-breakpad/issues/detail?id=224
       BPLOG(ERROR) << "MinidumpContext not actually amd64 context";
       return false;
     }
     // Do this after reading the entire MDRawContext structure because
     // GetSystemInfo may seek minidump to a new position.
     if (!CheckAgainstSystemInfo(cpu_type)) {
       BPLOG(ERROR) << "MinidumpContext amd64 does not match system info";
       return false;
     }
     // Normalize the 128-bit types in the dump.
     // Since this is AMD64, by definition, the values are little-endian.
     for (unsigned int vr_index = 0;
          vr_index < MD_CONTEXT_AMD64_VR_COUNT;
          ++vr_index)
       Normalize128(&context_amd64->vector_register[vr_index], false);
     if (minidump_->swap()) {
       Swap(&context_amd64->p1_home);
       Swap(&context_amd64->p2_home);
       Swap(&context_amd64->p3_home);
       Swap(&context_amd64->p4_home);
       Swap(&context_amd64->p5_home);
       Swap(&context_amd64->p6_home);
       // context_flags is already swapped
       Swap(&context_amd64->mx_csr);
       Swap(&context_amd64->cs);
       Swap(&context_amd64->ds);
       Swap(&context_amd64->es);
       Swap(&context_amd64->fs);
       Swap(&context_amd64->ss);
       Swap(&context_amd64->eflags);
       Swap(&context_amd64->dr0);
       Swap(&context_amd64->dr1);
       Swap(&context_amd64->dr2);
       Swap(&context_amd64->dr3);
       Swap(&context_amd64->dr6);
       Swap(&context_amd64->dr7);
       Swap(&context_amd64->rax);
       Swap(&context_amd64->rcx);
       Swap(&context_amd64->rdx);
       Swap(&context_amd64->rbx);
       Swap(&context_amd64->rsp);
       Swap(&context_amd64->rbp);
       Swap(&context_amd64->rsi);
       Swap(&context_amd64->rdi);
       Swap(&context_amd64->r8);
       Swap(&context_amd64->r9);
       Swap(&context_amd64->r10);
       Swap(&context_amd64->r11);
       Swap(&context_amd64->r12);
       Swap(&context_amd64->r13);
       Swap(&context_amd64->r14);
       Swap(&context_amd64->r15);
       Swap(&context_amd64->rip);
       //FIXME: I'm not sure what actually determines
       // which member of the union {flt_save, sse_registers}
       // is valid.  We're not currently using either,
       // but it would be good to have them swapped properly.
       for (unsigned int vr_index = 0;
            vr_index < MD_CONTEXT_AMD64_VR_COUNT;
            ++vr_index)
         Swap(&context_amd64->vector_register[vr_index]);
       Swap(&context_amd64->vector_control);
       Swap(&context_amd64->debug_control);
       Swap(&context_amd64->last_branch_to_rip);
       Swap(&context_amd64->last_branch_from_rip);
       Swap(&context_amd64->last_exception_to_rip);
       Swap(&context_amd64->last_exception_from_rip);
     }
     context_flags_ = context_amd64->context_flags;
     context_.amd64 = context_amd64.release();
   }
   else {
     uint32_t context_flags;
     if (!minidump_->ReadBytes(&context_flags, sizeof(context_flags))) {
       BPLOG(ERROR) << "MinidumpContext could not read context flags";
       return false;
     }
     if (minidump_->swap())
       Swap(&context_flags);
     uint32_t cpu_type = context_flags & MD_CONTEXT_CPU_MASK;
     if (cpu_type == 0) {
       // Unfortunately the flag for MD_CONTEXT_ARM that was taken
       // from a Windows CE SDK header conflicts in practice with
       // the CONTEXT_XSTATE flag. MD_CONTEXT_ARM has been renumbered,
       // but handle dumps with the legacy value gracefully here.
       if (context_flags & MD_CONTEXT_ARM_OLD) {
         context_flags |= MD_CONTEXT_ARM;
         context_flags &= ~MD_CONTEXT_ARM_OLD;
         cpu_type = MD_CONTEXT_ARM;
       }
     }
     if (cpu_type == 0) {
       if (minidump_->GetContextCPUFlagsFromSystemInfo(&cpu_type)) {
         context_flags |= cpu_type;
       } else {
         BPLOG(ERROR) << "Failed to preserve the current stream position";
         return false;
       }
     }
     // Allocate the context structure for the correct CPU and fill it.  The
     // casts are slightly unorthodox, but it seems better to do that than to
     // maintain a separate pointer for each type of CPU context structure
     // when only one of them will be used.
     switch (cpu_type) {
       case MD_CONTEXT_X86: {
         if (expected_size != sizeof(MDRawContextX86)) {
           BPLOG(ERROR) << "MinidumpContext x86 size mismatch, " <<
             expected_size << " != " << sizeof(MDRawContextX86);
           return false;
         }
         scoped_ptr<MDRawContextX86> context_x86(new MDRawContextX86());
         // Set the context_flags member, which has already been read, and
         // read the rest of the structure beginning with the first member
         // after context_flags.
         context_x86->context_flags = context_flags;
         size_t flags_size = sizeof(context_x86->context_flags);
         uint8_t* context_after_flags =
           reinterpret_cast<uint8_t*>(context_x86.get()) + flags_size;
         if (!minidump_->ReadBytes(context_after_flags,
                                   sizeof(MDRawContextX86) - flags_size)) {
           BPLOG(ERROR) << "MinidumpContext could not read x86 context";
           return false;
         }
         // Do this after reading the entire MDRawContext structure because
         // GetSystemInfo may seek minidump to a new position.
         if (!CheckAgainstSystemInfo(cpu_type)) {
           BPLOG(ERROR) << "MinidumpContext x86 does not match system info";
           return false;
         }
         if (minidump_->swap()) {
           // context_x86->context_flags was already swapped.
           Swap(&context_x86->dr0);
           Swap(&context_x86->dr1);
           Swap(&context_x86->dr2);
           Swap(&context_x86->dr3);
           Swap(&context_x86->dr6);
           Swap(&context_x86->dr7);
           Swap(&context_x86->float_save.control_word);
           Swap(&context_x86->float_save.status_word);
           Swap(&context_x86->float_save.tag_word);
           Swap(&context_x86->float_save.error_offset);
           Swap(&context_x86->float_save.error_selector);
           Swap(&context_x86->float_save.data_offset);
           Swap(&context_x86->float_save.data_selector);
           // context_x86->float_save.register_area[] contains 8-bit quantities
           // and does not need to be swapped.
           Swap(&context_x86->float_save.cr0_npx_state);
           Swap(&context_x86->gs);
           Swap(&context_x86->fs);
           Swap(&context_x86->es);
           Swap(&context_x86->ds);
           Swap(&context_x86->edi);
           Swap(&context_x86->esi);
           Swap(&context_x86->ebx);
           Swap(&context_x86->edx);
           Swap(&context_x86->ecx);
           Swap(&context_x86->eax);
           Swap(&context_x86->ebp);
           Swap(&context_x86->eip);
           Swap(&context_x86->cs);
           Swap(&context_x86->eflags);
           Swap(&context_x86->esp);
           Swap(&context_x86->ss);
           // context_x86->extended_registers[] contains 8-bit quantities and
           // does not need to be swapped.
         }
         context_.x86 = context_x86.release();
         break;
       }
       case MD_CONTEXT_PPC: {
         if (expected_size != sizeof(MDRawContextPPC)) {
           BPLOG(ERROR) << "MinidumpContext ppc size mismatch, " <<
             expected_size << " != " << sizeof(MDRawContextPPC);
           return false;
         }
         scoped_ptr<MDRawContextPPC> context_ppc(new MDRawContextPPC());
         // Set the context_flags member, which has already been read, and
         // read the rest of the structure beginning with the first member
         // after context_flags.
         context_ppc->context_flags = context_flags;
         size_t flags_size = sizeof(context_ppc->context_flags);
         uint8_t* context_after_flags =
           reinterpret_cast<uint8_t*>(context_ppc.get()) + flags_size;
         if (!minidump_->ReadBytes(context_after_flags,
                                   sizeof(MDRawContextPPC) - flags_size)) {
           BPLOG(ERROR) << "MinidumpContext could not read ppc context";
           return false;
         }
         // Do this after reading the entire MDRawContext structure because
         // GetSystemInfo may seek minidump to a new position.
         if (!CheckAgainstSystemInfo(cpu_type)) {
           BPLOG(ERROR) << "MinidumpContext ppc does not match system info";
           return false;
         }
         // Normalize the 128-bit types in the dump.
         // Since this is PowerPC, by definition, the values are big-endian.
         for (unsigned int vr_index = 0;
              vr_index < MD_VECTORSAVEAREA_PPC_VR_COUNT;
              ++vr_index) {
           Normalize128(&context_ppc->vector_save.save_vr[vr_index], true);
         }
         if (minidump_->swap()) {
           // context_ppc->context_flags was already swapped.
           Swap(&context_ppc->srr0);
           Swap(&context_ppc->srr1);
           for (unsigned int gpr_index = 0;
                gpr_index < MD_CONTEXT_PPC_GPR_COUNT;
                ++gpr_index) {
             Swap(&context_ppc->gpr[gpr_index]);
           }
           Swap(&context_ppc->cr);
           Swap(&context_ppc->xer);
           Swap(&context_ppc->lr);
           Swap(&context_ppc->ctr);
           Swap(&context_ppc->mq);
           Swap(&context_ppc->vrsave);
           for (unsigned int fpr_index = 0;
                fpr_index < MD_FLOATINGSAVEAREA_PPC_FPR_COUNT;
                ++fpr_index) {
             Swap(&context_ppc->float_save.fpregs[fpr_index]);
           }
           // Don't swap context_ppc->float_save.fpscr_pad because it is only
           // used for padding.
           Swap(&context_ppc->float_save.fpscr);
           for (unsigned int vr_index = 0;
                vr_index < MD_VECTORSAVEAREA_PPC_VR_COUNT;
                ++vr_index) {
             Swap(&context_ppc->vector_save.save_vr[vr_index]);
           }
           Swap(&context_ppc->vector_save.save_vscr);
           // Don't swap the padding fields in vector_save.
           Swap(&context_ppc->vector_save.save_vrvalid);
         }
         context_.ppc = context_ppc.release();
         break;
       }
       case MD_CONTEXT_SPARC: {
         if (expected_size != sizeof(MDRawContextSPARC)) {
           BPLOG(ERROR) << "MinidumpContext sparc size mismatch, " <<
             expected_size << " != " << sizeof(MDRawContextSPARC);
           return false;
         }
         scoped_ptr<MDRawContextSPARC> context_sparc(new MDRawContextSPARC());
         // Set the context_flags member, which has already been read, and
         // read the rest of the structure beginning with the first member
         // after context_flags.
         context_sparc->context_flags = context_flags;
         size_t flags_size = sizeof(context_sparc->context_flags);
         uint8_t* context_after_flags =
             reinterpret_cast<uint8_t*>(context_sparc.get()) + flags_size;
         if (!minidump_->ReadBytes(context_after_flags,
                                   sizeof(MDRawContextSPARC) - flags_size)) {
           BPLOG(ERROR) << "MinidumpContext could not read sparc context";
           return false;
         }
         // Do this after reading the entire MDRawContext structure because
         // GetSystemInfo may seek minidump to a new position.
         if (!CheckAgainstSystemInfo(cpu_type)) {
           BPLOG(ERROR) << "MinidumpContext sparc does not match system info";
           return false;
         }
         if (minidump_->swap()) {
           // context_sparc->context_flags was already swapped.
           for (unsigned int gpr_index = 0;
                gpr_index < MD_CONTEXT_SPARC_GPR_COUNT;
                ++gpr_index) {
             Swap(&context_sparc->g_r[gpr_index]);
           }
           Swap(&context_sparc->ccr);
           Swap(&context_sparc->pc);
           Swap(&context_sparc->npc);
           Swap(&context_sparc->y);
           Swap(&context_sparc->asi);
           Swap(&context_sparc->fprs);
           for (unsigned int fpr_index = 0;
                fpr_index < MD_FLOATINGSAVEAREA_SPARC_FPR_COUNT;
                ++fpr_index) {
             Swap(&context_sparc->float_save.regs[fpr_index]);
           }
           Swap(&context_sparc->float_save.filler);
           Swap(&context_sparc->float_save.fsr);
         }
         context_.ctx_sparc = context_sparc.release();
         break;
       }
       case MD_CONTEXT_ARM: {
         if (expected_size != sizeof(MDRawContextARM)) {
           BPLOG(ERROR) << "MinidumpContext arm size mismatch, " <<
             expected_size << " != " << sizeof(MDRawContextARM);
           return false;
         }
         scoped_ptr<MDRawContextARM> context_arm(new MDRawContextARM());
         // Set the context_flags member, which has already been read, and
         // read the rest of the structure beginning with the first member
         // after context_flags.
         context_arm->context_flags = context_flags;
         size_t flags_size = sizeof(context_arm->context_flags);
         uint8_t* context_after_flags =
             reinterpret_cast<uint8_t*>(context_arm.get()) + flags_size;
         if (!minidump_->ReadBytes(context_after_flags,
                                   sizeof(MDRawContextARM) - flags_size)) {
           BPLOG(ERROR) << "MinidumpContext could not read arm context";
           return false;
         }
         // Do this after reading the entire MDRawContext structure because
         // GetSystemInfo may seek minidump to a new position.
         if (!CheckAgainstSystemInfo(cpu_type)) {
           BPLOG(ERROR) << "MinidumpContext arm does not match system info";
           return false;
         }
         if (minidump_->swap()) {
           // context_arm->context_flags was already swapped.
           for (unsigned int ireg_index = 0;
                ireg_index < MD_CONTEXT_ARM_GPR_COUNT;
                ++ireg_index) {
             Swap(&context_arm->iregs[ireg_index]);
           }
           Swap(&context_arm->cpsr);
           Swap(&context_arm->float_save.fpscr);
           for (unsigned int fpr_index = 0;
                fpr_index < MD_FLOATINGSAVEAREA_ARM_FPR_COUNT;
                ++fpr_index) {
             Swap(&context_arm->float_save.regs[fpr_index]);
           }
           for (unsigned int fpe_index = 0;
                fpe_index < MD_FLOATINGSAVEAREA_ARM_FPEXTRA_COUNT;
                ++fpe_index) {
             Swap(&context_arm->float_save.extra[fpe_index]);
           }
         }
         context_.arm = context_arm.release();
         break;
       }
       default: {
         // Unknown context type - Don't log as an error yet. Let the
         // caller work that out.
         BPLOG(INFO) << "MinidumpContext unknown context type " <<
           HexString(cpu_type);
         return false;
         break;
       }
     }
     context_flags_ = context_flags;
   }
   valid_ = true;
   return true;
 }
 uint32_t MinidumpContext::GetContextCPU() const {
   if (!valid_) {
     // Don't log a message, GetContextCPU can be legitimately called with
     // valid_ false by FreeContext, which is called by Read.
     return 0;
   }
   return context_flags_ & MD_CONTEXT_CPU_MASK;
 }
 bool MinidumpContext::GetInstructionPointer(uint64_t* ip) const {
   BPLOG_IF(ERROR, !ip) << "MinidumpContext::GetInstructionPointer "
                           "requires |ip|";
   assert(ip);
   *ip = 0;
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpContext for GetInstructionPointer";
     return false;
   }
   switch (context_flags_ & MD_CONTEXT_CPU_MASK) {
   case MD_CONTEXT_AMD64:
     *ip = context_.amd64->rip;
     break;
   case MD_CONTEXT_ARM:
     *ip = context_.arm->iregs[MD_CONTEXT_ARM_REG_PC];
     break;
   case MD_CONTEXT_PPC:
     *ip = context_.ppc->srr0;
     break;
   case MD_CONTEXT_SPARC:
     *ip = context_.ctx_sparc->pc;
     break;
   case MD_CONTEXT_X86:
     *ip = context_.x86->eip;
     break;
   default:
     // This should never happen.
     BPLOG(ERROR) << "Unknown CPU architecture in GetInstructionPointer";
     return false;
   }
   return true;
 }
 const MDRawContextX86* MinidumpContext::GetContextX86() const {
   if (GetContextCPU() != MD_CONTEXT_X86) {
     BPLOG(ERROR) << "MinidumpContext cannot get x86 context";
     return NULL;
   }
   return context_.x86;
 }
 const MDRawContextPPC* MinidumpContext::GetContextPPC() const {
   if (GetContextCPU() != MD_CONTEXT_PPC) {
     BPLOG(ERROR) << "MinidumpContext cannot get ppc context";
     return NULL;
   }
   return context_.ppc;
 }
 const MDRawContextAMD64* MinidumpContext::GetContextAMD64() const {
   if (GetContextCPU() != MD_CONTEXT_AMD64) {
     BPLOG(ERROR) << "MinidumpContext cannot get amd64 context";
     return NULL;
   }
   return context_.amd64;
 }
 const MDRawContextSPARC* MinidumpContext::GetContextSPARC() const {
   if (GetContextCPU() != MD_CONTEXT_SPARC) {
     BPLOG(ERROR) << "MinidumpContext cannot get sparc context";
     return NULL;
   }
   return context_.ctx_sparc;
 }
 const MDRawContextARM* MinidumpContext::GetContextARM() const {
   if (GetContextCPU() != MD_CONTEXT_ARM) {
     BPLOG(ERROR) << "MinidumpContext cannot get arm context";
     return NULL;
   }
   return context_.arm;
 }
 void MinidumpContext::FreeContext() {
   switch (GetContextCPU()) {
     case MD_CONTEXT_X86:
       delete context_.x86;
       break;
     case MD_CONTEXT_PPC:
       delete context_.ppc;
       break;
     case MD_CONTEXT_AMD64:
       delete context_.amd64;
       break;
     case MD_CONTEXT_SPARC:
       delete context_.ctx_sparc;
       break;
     case MD_CONTEXT_ARM:
       delete context_.arm;
       break;
     default:
       // There is no context record (valid_ is false) or there's a
       // context record for an unknown CPU (shouldn't happen, only known
       // records are stored by Read).
       break;
   }
   context_flags_ = 0;
   context_.base = NULL;
 }
 bool MinidumpContext::CheckAgainstSystemInfo(uint32_t context_cpu_type) {
   // It's OK if the minidump doesn't contain an MD_SYSTEM_INFO_STREAM,
   // as this function just implements a sanity check.
   MinidumpSystemInfo* system_info = minidump_->GetSystemInfo();
   if (!system_info) {
     BPLOG(INFO) << "MinidumpContext could not be compared against "
                    "MinidumpSystemInfo";
     return true;
   }
   // If there is an MD_SYSTEM_INFO_STREAM, it should contain valid system info.
   const MDRawSystemInfo* raw_system_info = system_info->system_info();
   if (!raw_system_info) {
     BPLOG(INFO) << "MinidumpContext could not be compared against "
                    "MDRawSystemInfo";
     return false;
   }
   MDCPUArchitecture system_info_cpu_type = static_cast<MDCPUArchitecture>(
       raw_system_info->processor_architecture);
   // Compare the CPU type of the context record to the CPU type in the
   // minidump's system info stream.
   bool return_value = false;
   switch (context_cpu_type) {
     case MD_CONTEXT_X86:
       if (system_info_cpu_type == MD_CPU_ARCHITECTURE_X86 ||
           system_info_cpu_type == MD_CPU_ARCHITECTURE_X86_WIN64 ||
           system_info_cpu_type == MD_CPU_ARCHITECTURE_AMD64) {
         return_value = true;
       }
       break;
     case MD_CONTEXT_PPC:
       if (system_info_cpu_type == MD_CPU_ARCHITECTURE_PPC)
         return_value = true;
       break;
     case MD_CONTEXT_AMD64:
       if (system_info_cpu_type == MD_CPU_ARCHITECTURE_AMD64)
         return_value = true;
       break;
     case MD_CONTEXT_SPARC:
       if (system_info_cpu_type == MD_CPU_ARCHITECTURE_SPARC)
         return_value = true;
       break;
     case MD_CONTEXT_ARM:
       if (system_info_cpu_type == MD_CPU_ARCHITECTURE_ARM)
         return_value = true;
       break;
   }
   BPLOG_IF(ERROR, !return_value) << "MinidumpContext CPU " <<
                                     HexString(context_cpu_type) <<
                                     " wrong for MinidumpSystemInfo CPU " <<
                                     HexString(system_info_cpu_type);
   return return_value;
 }
 void MinidumpContext::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpContext cannot print invalid data";
     return;
   }
   switch (GetContextCPU()) {
     case MD_CONTEXT_X86: {
       const MDRawContextX86* context_x86 = GetContextX86();
       printf("MDRawContextX86\n");
       printf("  context_flags                = 0x%x\n",
              context_x86->context_flags);
       printf("  dr0                          = 0x%x\n", context_x86->dr0);
       printf("  dr1                          = 0x%x\n", context_x86->dr1);
       printf("  dr2                          = 0x%x\n", context_x86->dr2);
       printf("  dr3                          = 0x%x\n", context_x86->dr3);
       printf("  dr6                          = 0x%x\n", context_x86->dr6);
       printf("  dr7                          = 0x%x\n", context_x86->dr7);
       printf("  float_save.control_word      = 0x%x\n",
              context_x86->float_save.control_word);
       printf("  float_save.status_word       = 0x%x\n",
              context_x86->float_save.status_word);
       printf("  float_save.tag_word          = 0x%x\n",
              context_x86->float_save.tag_word);
       printf("  float_save.error_offset      = 0x%x\n",
              context_x86->float_save.error_offset);
       printf("  float_save.error_selector    = 0x%x\n",
              context_x86->float_save.error_selector);
       printf("  float_save.data_offset       = 0x%x\n",
              context_x86->float_save.data_offset);
       printf("  float_save.data_selector     = 0x%x\n",
              context_x86->float_save.data_selector);
       printf("  float_save.register_area[%2d] = 0x",
              MD_FLOATINGSAVEAREA_X86_REGISTERAREA_SIZE);
       for (unsigned int register_index = 0;
            register_index < MD_FLOATINGSAVEAREA_X86_REGISTERAREA_SIZE;
            ++register_index) {
         printf("%02x", context_x86->float_save.register_area[register_index]);
       }
       printf("\n");
       printf("  float_save.cr0_npx_state     = 0x%x\n",
              context_x86->float_save.cr0_npx_state);
       printf("  gs                           = 0x%x\n", context_x86->gs);
       printf("  fs                           = 0x%x\n", context_x86->fs);
       printf("  es                           = 0x%x\n", context_x86->es);
       printf("  ds                           = 0x%x\n", context_x86->ds);
       printf("  edi                          = 0x%x\n", context_x86->edi);
       printf("  esi                          = 0x%x\n", context_x86->esi);
       printf("  ebx                          = 0x%x\n", context_x86->ebx);
       printf("  edx                          = 0x%x\n", context_x86->edx);
       printf("  ecx                          = 0x%x\n", context_x86->ecx);
       printf("  eax                          = 0x%x\n", context_x86->eax);
       printf("  ebp                          = 0x%x\n", context_x86->ebp);
       printf("  eip                          = 0x%x\n", context_x86->eip);
       printf("  cs                           = 0x%x\n", context_x86->cs);
       printf("  eflags                       = 0x%x\n", context_x86->eflags);
       printf("  esp                          = 0x%x\n", context_x86->esp);
       printf("  ss                           = 0x%x\n", context_x86->ss);
       printf("  extended_registers[%3d]      = 0x",
              MD_CONTEXT_X86_EXTENDED_REGISTERS_SIZE);
       for (unsigned int register_index = 0;
            register_index < MD_CONTEXT_X86_EXTENDED_REGISTERS_SIZE;
            ++register_index) {
         printf("%02x", context_x86->extended_registers[register_index]);
       }
       printf("\n\n");
       break;
     }
     case MD_CONTEXT_PPC: {
       const MDRawContextPPC* context_ppc = GetContextPPC();
       printf("MDRawContextPPC\n");
       printf("  context_flags            = 0x%x\n",
              context_ppc->context_flags);
       printf("  srr0                     = 0x%x\n", context_ppc->srr0);
       printf("  srr1                     = 0x%x\n", context_ppc->srr1);
       for (unsigned int gpr_index = 0;
            gpr_index < MD_CONTEXT_PPC_GPR_COUNT;
            ++gpr_index) {
         printf("  gpr[%2d]                  = 0x%x\n",
                gpr_index, context_ppc->gpr[gpr_index]);
       }
       printf("  cr                       = 0x%x\n", context_ppc->cr);
       printf("  xer                      = 0x%x\n", context_ppc->xer);
       printf("  lr                       = 0x%x\n", context_ppc->lr);
       printf("  ctr                      = 0x%x\n", context_ppc->ctr);
       printf("  mq                       = 0x%x\n", context_ppc->mq);
       printf("  vrsave                   = 0x%x\n", context_ppc->vrsave);
       for (unsigned int fpr_index = 0;
            fpr_index < MD_FLOATINGSAVEAREA_PPC_FPR_COUNT;
            ++fpr_index) {
         printf("  float_save.fpregs[%2d]    = 0x%" PRIx64 "\n",
                fpr_index, context_ppc->float_save.fpregs[fpr_index]);
       }
       printf("  float_save.fpscr         = 0x%x\n",
              context_ppc->float_save.fpscr);
       // TODO(mmentovai): print the 128-bit quantities in
       // context_ppc->vector_save.  This isn't done yet because printf
       // doesn't support 128-bit quantities, and printing them using
       // PRIx64 as two 64-bit quantities requires knowledge of the CPU's
       // byte ordering.
       printf("  vector_save.save_vrvalid = 0x%x\n",
              context_ppc->vector_save.save_vrvalid);
       printf("\n");
       break;
     }
     case MD_CONTEXT_AMD64: {
       const MDRawContextAMD64* context_amd64 = GetContextAMD64();
       printf("MDRawContextAMD64\n");
       printf("  p1_home       = 0x%" PRIx64 "\n",
              context_amd64->p1_home);
       printf("  p2_home       = 0x%" PRIx64 "\n",
              context_amd64->p2_home);
       printf("  p3_home       = 0x%" PRIx64 "\n",
              context_amd64->p3_home);
       printf("  p4_home       = 0x%" PRIx64 "\n",
              context_amd64->p4_home);
       printf("  p5_home       = 0x%" PRIx64 "\n",
              context_amd64->p5_home);
       printf("  p6_home       = 0x%" PRIx64 "\n",
              context_amd64->p6_home);
       printf("  context_flags = 0x%x\n",
              context_amd64->context_flags);
       printf("  mx_csr        = 0x%x\n",
              context_amd64->mx_csr);
       printf("  cs            = 0x%x\n", context_amd64->cs);
       printf("  ds            = 0x%x\n", context_amd64->ds);
       printf("  es            = 0x%x\n", context_amd64->es);
       printf("  fs            = 0x%x\n", context_amd64->fs);
       printf("  gs            = 0x%x\n", context_amd64->gs);
       printf("  ss            = 0x%x\n", context_amd64->ss);
       printf("  eflags        = 0x%x\n", context_amd64->eflags);
       printf("  dr0           = 0x%" PRIx64 "\n", context_amd64->dr0);
       printf("  dr1           = 0x%" PRIx64 "\n", context_amd64->dr1);
       printf("  dr2           = 0x%" PRIx64 "\n", context_amd64->dr2);
       printf("  dr3           = 0x%" PRIx64 "\n", context_amd64->dr3);
       printf("  dr6           = 0x%" PRIx64 "\n", context_amd64->dr6);
       printf("  dr7           = 0x%" PRIx64 "\n", context_amd64->dr7);
       printf("  rax           = 0x%" PRIx64 "\n", context_amd64->rax);
       printf("  rcx           = 0x%" PRIx64 "\n", context_amd64->rcx);
       printf("  rdx           = 0x%" PRIx64 "\n", context_amd64->rdx);
       printf("  rbx           = 0x%" PRIx64 "\n", context_amd64->rbx);
       printf("  rsp           = 0x%" PRIx64 "\n", context_amd64->rsp);
       printf("  rbp           = 0x%" PRIx64 "\n", context_amd64->rbp);
       printf("  rsi           = 0x%" PRIx64 "\n", context_amd64->rsi);
       printf("  rdi           = 0x%" PRIx64 "\n", context_amd64->rdi);
       printf("  r8            = 0x%" PRIx64 "\n", context_amd64->r8);
       printf("  r9            = 0x%" PRIx64 "\n", context_amd64->r9);
       printf("  r10           = 0x%" PRIx64 "\n", context_amd64->r10);
       printf("  r11           = 0x%" PRIx64 "\n", context_amd64->r11);
       printf("  r12           = 0x%" PRIx64 "\n", context_amd64->r12);
       printf("  r13           = 0x%" PRIx64 "\n", context_amd64->r13);
       printf("  r14           = 0x%" PRIx64 "\n", context_amd64->r14);
       printf("  r15           = 0x%" PRIx64 "\n", context_amd64->r15);
       printf("  rip           = 0x%" PRIx64 "\n", context_amd64->rip);
       //TODO: print xmm, vector, debug registers
       printf("\n");
       break;
     }
     case MD_CONTEXT_SPARC: {
       const MDRawContextSPARC* context_sparc = GetContextSPARC();
       printf("MDRawContextSPARC\n");
       printf("  context_flags       = 0x%x\n",
              context_sparc->context_flags);
       for (unsigned int g_r_index = 0;
            g_r_index < MD_CONTEXT_SPARC_GPR_COUNT;
            ++g_r_index) {
         printf("  g_r[%2d]             = 0x%" PRIx64 "\n",
                g_r_index, context_sparc->g_r[g_r_index]);
       }
       printf("  ccr                 = 0x%" PRIx64 "\n", context_sparc->ccr);
       printf("  pc                  = 0x%" PRIx64 "\n", context_sparc->pc);
       printf("  npc                 = 0x%" PRIx64 "\n", context_sparc->npc);
       printf("  y                   = 0x%" PRIx64 "\n", context_sparc->y);
       printf("  asi                 = 0x%" PRIx64 "\n", context_sparc->asi);
       printf("  fprs                = 0x%" PRIx64 "\n", context_sparc->fprs);
       for (unsigned int fpr_index = 0;
            fpr_index < MD_FLOATINGSAVEAREA_SPARC_FPR_COUNT;
            ++fpr_index) {
         printf("  float_save.regs[%2d] = 0x%" PRIx64 "\n",
                fpr_index, context_sparc->float_save.regs[fpr_index]);
       }
       printf("  float_save.filler   = 0x%" PRIx64 "\n",
              context_sparc->float_save.filler);
       printf("  float_save.fsr      = 0x%" PRIx64 "\n",
              context_sparc->float_save.fsr);
       break;
     }
     case MD_CONTEXT_ARM: {
       const MDRawContextARM* context_arm = GetContextARM();
       printf("MDRawContextARM\n");
       printf("  context_flags       = 0x%x\n",
              context_arm->context_flags);
       for (unsigned int ireg_index = 0;
            ireg_index < MD_CONTEXT_ARM_GPR_COUNT;
            ++ireg_index) {
         printf("  iregs[%2d]            = 0x%x\n",
                ireg_index, context_arm->iregs[ireg_index]);
       }
       printf("  cpsr                = 0x%x\n", context_arm->cpsr);
       printf("  float_save.fpscr     = 0x%" PRIx64 "\n",
              context_arm->float_save.fpscr);
       for (unsigned int fpr_index = 0;
            fpr_index < MD_FLOATINGSAVEAREA_ARM_FPR_COUNT;
            ++fpr_index) {
         printf("  float_save.regs[%2d] = 0x%" PRIx64 "\n",
                fpr_index, context_arm->float_save.regs[fpr_index]);
       }
       for (unsigned int fpe_index = 0;
            fpe_index < MD_FLOATINGSAVEAREA_ARM_FPEXTRA_COUNT;
            ++fpe_index) {
         printf("  float_save.extra[%2d] = 0x%" PRIx32 "\n",
                fpe_index, context_arm->float_save.extra[fpe_index]);
       }
       break;
     }
     default: {
       break;
     }
   }
 }
 //
 // MinidumpMemoryRegion
 //
 uint32_t MinidumpMemoryRegion::max_bytes_ = 1024 * 1024;  // 1MB
 MinidumpMemoryRegion::MinidumpMemoryRegion(Minidump* minidump)
     : MinidumpObject(minidump),
       descriptor_(NULL),
       memory_(NULL) {
 }
 MinidumpMemoryRegion::~MinidumpMemoryRegion() {
   delete memory_;
 }
 void MinidumpMemoryRegion::SetDescriptor(MDMemoryDescriptor* descriptor) {
   descriptor_ = descriptor;
   valid_ = descriptor &&
            descriptor_->memory.data_size <=
                numeric_limits<uint64_t>::max() -
                descriptor_->start_of_memory_range;
 }
 const uint8_t* MinidumpMemoryRegion::GetMemory() const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpMemoryRegion for GetMemory";
     return NULL;
   }
   if (!memory_) {
     if (descriptor_->memory.data_size == 0) {
       BPLOG(ERROR) << "MinidumpMemoryRegion is empty";
       return NULL;
     }
     if (!minidump_->SeekSet(descriptor_->memory.rva)) {
       BPLOG(ERROR) << "MinidumpMemoryRegion could not seek to memory region";
       return NULL;
     }
     if (descriptor_->memory.data_size > max_bytes_) {
       BPLOG(ERROR) << "MinidumpMemoryRegion size " <<
                       descriptor_->memory.data_size << " exceeds maximum " <<
                       max_bytes_;
       return NULL;
     }
     scoped_ptr< vector<uint8_t> > memory(
         new vector<uint8_t>(descriptor_->memory.data_size));
     if (!minidump_->ReadBytes(&(*memory)[0], descriptor_->memory.data_size)) {
       BPLOG(ERROR) << "MinidumpMemoryRegion could not read memory region";
       return NULL;
     }
     memory_ = memory.release();
   }
   return &(*memory_)[0];
 }
 uint64_t MinidumpMemoryRegion::GetBase() const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpMemoryRegion for GetBase";
     return static_cast<uint64_t>(-1);
   }
   return descriptor_->start_of_memory_range;
 }
 uint32_t MinidumpMemoryRegion::GetSize() const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpMemoryRegion for GetSize";
     return 0;
   }
   return descriptor_->memory.data_size;
 }
 void MinidumpMemoryRegion::FreeMemory() {
   delete memory_;
   memory_ = NULL;
 }
 template<typename T>
 bool MinidumpMemoryRegion::GetMemoryAtAddressInternal(uint64_t address,
                                                       T*        value) const {
   BPLOG_IF(ERROR, !value) << "MinidumpMemoryRegion::GetMemoryAtAddressInternal "
                              "requires |value|";
   assert(value);
   *value = 0;
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpMemoryRegion for "
                     "GetMemoryAtAddressInternal";
     return false;
   }
   // Common failure case
   if (address < descriptor_->start_of_memory_range ||
       sizeof(T) > numeric_limits<uint64_t>::max() - address ||
       address + sizeof(T) > descriptor_->start_of_memory_range +
                             descriptor_->memory.data_size) {
     BPLOG(INFO) << "MinidumpMemoryRegion request out of range: " <<
                     HexString(address) << "+" << sizeof(T) << "/" <<
                     HexString(descriptor_->start_of_memory_range) << "+" <<
                     HexString(descriptor_->memory.data_size);
     return false;
   }
   const uint8_t* memory = GetMemory();
   if (!memory) {
     // GetMemory already logged a perfectly good message.
     return false;
   }
   // If the CPU requires memory accesses to be aligned, this can crash.
   // x86 and ppc are able to cope, though.
   *value = *reinterpret_cast<const T*>(
       &memory[address - descriptor_->start_of_memory_range]);
   if (minidump_->swap())
     Swap(value);
   return true;
 }
 bool MinidumpMemoryRegion::GetMemoryAtAddress(uint64_t  address,
                                               uint8_t*  value) const {
   return GetMemoryAtAddressInternal(address, value);
 }
 bool MinidumpMemoryRegion::GetMemoryAtAddress(uint64_t  address,
                                               uint16_t* value) const {
   return GetMemoryAtAddressInternal(address, value);
 }
 bool MinidumpMemoryRegion::GetMemoryAtAddress(uint64_t  address,
                                               uint32_t* value) const {
   return GetMemoryAtAddressInternal(address, value);
 }
 bool MinidumpMemoryRegion::GetMemoryAtAddress(uint64_t  address,
                                               uint64_t* value) const {
   return GetMemoryAtAddressInternal(address, value);
 }
 void MinidumpMemoryRegion::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpMemoryRegion cannot print invalid data";
     return;
   }
   const uint8_t* memory = GetMemory();
   if (memory) {
     printf("0x");
     for (unsigned int byte_index = 0;
          byte_index < descriptor_->memory.data_size;
          byte_index++) {
       printf("%02x", memory[byte_index]);
     }
     printf("\n");
   } else {
     printf("No memory\n");
   }
 }
 //
 // MinidumpThread
 //
 MinidumpThread::MinidumpThread(Minidump* minidump)
     : MinidumpObject(minidump),
       thread_(),
       memory_(NULL),
       context_(NULL) {
 }
 MinidumpThread::~MinidumpThread() {
   delete memory_;
   delete context_;
 }
 bool MinidumpThread::Read() {
   // Invalidate cached data.
   delete memory_;
   memory_ = NULL;
   delete context_;
   context_ = NULL;
   valid_ = false;
   if (!minidump_->ReadBytes(&thread_, sizeof(thread_))) {
     BPLOG(ERROR) << "MinidumpThread cannot read thread";
     return false;
   }
   if (minidump_->swap()) {
     Swap(&thread_.thread_id);
     Swap(&thread_.suspend_count);
     Swap(&thread_.priority_class);
     Swap(&thread_.priority);
     Swap(&thread_.teb);
     Swap(&thread_.stack);
     Swap(&thread_.thread_context);
   }
   // Check for base + size overflow or undersize.
   if (thread_.stack.memory.data_size == 0 ||
       thread_.stack.memory.data_size > numeric_limits<uint64_t>::max() -
                                        thread_.stack.start_of_memory_range) {
     // This is ok, but log an error anyway.
     BPLOG(ERROR) << "MinidumpThread has a memory region problem, " <<
                     HexString(thread_.stack.start_of_memory_range) << "+" <<
                     HexString(thread_.stack.memory.data_size);
   } else {
     memory_ = new MinidumpMemoryRegion(minidump_);
     memory_->SetDescriptor(&thread_.stack);
   }
   valid_ = true;
   return true;
 }
 MinidumpMemoryRegion* MinidumpThread::GetMemory() {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpThread for GetMemory";
     return NULL;
   }
   return memory_;
 }
 MinidumpContext* MinidumpThread::GetContext() {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpThread for GetContext";
     return NULL;
   }
   if (!context_) {
     if (!minidump_->SeekSet(thread_.thread_context.rva)) {
       BPLOG(ERROR) << "MinidumpThread cannot seek to context";
       return NULL;
     }
     scoped_ptr<MinidumpContext> context(new MinidumpContext(minidump_));
     if (!context->Read(thread_.thread_context.data_size)) {
       BPLOG(ERROR) << "MinidumpThread cannot read context";
       return NULL;
     }
     context_ = context.release();
   }
   return context_;
 }
 bool MinidumpThread::GetThreadID(uint32_t *thread_id) const {
   BPLOG_IF(ERROR, !thread_id) << "MinidumpThread::GetThreadID requires "
                                  "|thread_id|";
   assert(thread_id);
   *thread_id = 0;
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpThread for GetThreadID";
     return false;
   }
   *thread_id = thread_.thread_id;
   return true;
 }
 void MinidumpThread::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpThread cannot print invalid data";
     return;
   }
   printf("MDRawThread\n");
   printf("  thread_id                   = 0x%x\n",   thread_.thread_id);
   printf("  suspend_count               = %d\n",     thread_.suspend_count);
   printf("  priority_class              = 0x%x\n",   thread_.priority_class);
   printf("  priority                    = 0x%x\n",   thread_.priority);
   printf("  teb                         = 0x%" PRIx64 "\n", thread_.teb);
   printf("  stack.start_of_memory_range = 0x%" PRIx64 "\n",
          thread_.stack.start_of_memory_range);
   printf("  stack.memory.data_size      = 0x%x\n",
          thread_.stack.memory.data_size);
   printf("  stack.memory.rva            = 0x%x\n",   thread_.stack.memory.rva);
   printf("  thread_context.data_size    = 0x%x\n",
          thread_.thread_context.data_size);
   printf("  thread_context.rva          = 0x%x\n",
          thread_.thread_context.rva);
   MinidumpContext* context = GetContext();
   if (context) {
     printf("\n");
     context->Print();
   } else {
     printf("  (no context)\n");
     printf("\n");
   }
   MinidumpMemoryRegion* memory = GetMemory();
   if (memory) {
     printf("Stack\n");
     memory->Print();
   } else {
     printf("No stack\n");
   }
   printf("\n");
 }
 //
 // MinidumpThreadList
 //
 uint32_t MinidumpThreadList::max_threads_ = 4096;
 MinidumpThreadList::MinidumpThreadList(Minidump* minidump)
     : MinidumpStream(minidump),
       id_to_thread_map_(),
       threads_(NULL),
       thread_count_(0) {
 }
 MinidumpThreadList::~MinidumpThreadList() {
   delete threads_;
 }
 bool MinidumpThreadList::Read(uint32_t expected_size) {
   // Invalidate cached data.
   id_to_thread_map_.clear();
   delete threads_;
   threads_ = NULL;
   thread_count_ = 0;
   valid_ = false;
   uint32_t thread_count;
   if (expected_size < sizeof(thread_count)) {
     BPLOG(ERROR) << "MinidumpThreadList count size mismatch, " <<
                     expected_size << " < " << sizeof(thread_count);
     return false;
   }
   if (!minidump_->ReadBytes(&thread_count, sizeof(thread_count))) {
     BPLOG(ERROR) << "MinidumpThreadList cannot read thread count";
     return false;
   }
   if (minidump_->swap())
     Swap(&thread_count);
   if (thread_count > numeric_limits<uint32_t>::max() / sizeof(MDRawThread)) {
     BPLOG(ERROR) << "MinidumpThreadList thread count " << thread_count <<
                     " would cause multiplication overflow";
     return false;
   }
   if (expected_size != sizeof(thread_count) +
                        thread_count * sizeof(MDRawThread)) {
     // may be padded with 4 bytes on 64bit ABIs for alignment
     if (expected_size == sizeof(thread_count) + 4 +
                          thread_count * sizeof(MDRawThread)) {
       uint32_t useless;
       if (!minidump_->ReadBytes(&useless, 4)) {
         BPLOG(ERROR) << "MinidumpThreadList cannot read threadlist padded bytes";
         return false;
       }
     } else {
       BPLOG(ERROR) << "MinidumpThreadList size mismatch, " << expected_size <<
                     " != " << sizeof(thread_count) +
                     thread_count * sizeof(MDRawThread);
       return false;
     }
   }
   if (thread_count > max_threads_) {
     BPLOG(ERROR) << "MinidumpThreadList count " << thread_count <<
                     " exceeds maximum " << max_threads_;
     return false;
   }
   if (thread_count != 0) {
     scoped_ptr<MinidumpThreads> threads(
         new MinidumpThreads(thread_count, MinidumpThread(minidump_)));
     for (unsigned int thread_index = 0;
          thread_index < thread_count;
          ++thread_index) {
       MinidumpThread* thread = &(*threads)[thread_index];
       // Assume that the file offset is correct after the last read.
       if (!thread->Read()) {
         BPLOG(ERROR) << "MinidumpThreadList cannot read thread " <<
                         thread_index << "/" << thread_count;
         return false;
       }
       uint32_t thread_id;
       if (!thread->GetThreadID(&thread_id)) {
         BPLOG(ERROR) << "MinidumpThreadList cannot get thread ID for thread " <<
                         thread_index << "/" << thread_count;
         return false;
       }
       if (GetThreadByID(thread_id)) {
         // Another thread with this ID is already in the list.  Data error.
         BPLOG(ERROR) << "MinidumpThreadList found multiple threads with ID " <<
                         HexString(thread_id) << " at thread " <<
                         thread_index << "/" << thread_count;
         return false;
       }
       id_to_thread_map_[thread_id] = thread;
     }
     threads_ = threads.release();
   }
   thread_count_ = thread_count;
   valid_ = true;
   return true;
 }
 MinidumpThread* MinidumpThreadList::GetThreadAtIndex(unsigned int index)
     const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpThreadList for GetThreadAtIndex";
     return NULL;
   }
   if (index >= thread_count_) {
     BPLOG(ERROR) << "MinidumpThreadList index out of range: " <<
                     index << "/" << thread_count_;
     return NULL;
   }
   return &(*threads_)[index];
 }
 MinidumpThread* MinidumpThreadList::GetThreadByID(uint32_t thread_id) {
   // Don't check valid_.  Read calls this method before everything is
   // validated.  It is safe to not check valid_ here.
   return id_to_thread_map_[thread_id];
 }
 void MinidumpThreadList::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpThreadList cannot print invalid data";
     return;
   }
   printf("MinidumpThreadList\n");
   printf("  thread_count = %d\n", thread_count_);
   printf("\n");
   for (unsigned int thread_index = 0;
        thread_index < thread_count_;
        ++thread_index) {
     printf("thread[%d]\n", thread_index);
     (*threads_)[thread_index].Print();
   }
 }
 //
 // MinidumpModule
 //
 uint32_t MinidumpModule::max_cv_bytes_ = 32768;
 uint32_t MinidumpModule::max_misc_bytes_ = 32768;
 MinidumpModule::MinidumpModule(Minidump* minidump)
     : MinidumpObject(minidump),
       module_valid_(false),
       has_debug_info_(false),
       module_(),
       name_(NULL),
       cv_record_(NULL),
       cv_record_signature_(MD_CVINFOUNKNOWN_SIGNATURE),
       misc_record_(NULL) {
 }
 MinidumpModule::~MinidumpModule() {
   delete name_;
   delete cv_record_;
   delete misc_record_;
 }
 bool MinidumpModule::Read() {
   // Invalidate cached data.
   delete name_;
   name_ = NULL;
   delete cv_record_;
   cv_record_ = NULL;
   cv_record_signature_ = MD_CVINFOUNKNOWN_SIGNATURE;
   delete misc_record_;
   misc_record_ = NULL;
   module_valid_ = false;
   has_debug_info_ = false;
   valid_ = false;
   if (!minidump_->ReadBytes(&module_, MD_MODULE_SIZE)) {
     BPLOG(ERROR) << "MinidumpModule cannot read module";
     return false;
   }
   if (minidump_->swap()) {
     Swap(&module_.base_of_image);
     Swap(&module_.size_of_image);
     Swap(&module_.checksum);
     Swap(&module_.time_date_stamp);
     Swap(&module_.module_name_rva);
     Swap(&module_.version_info.signature);
     Swap(&module_.version_info.struct_version);
     Swap(&module_.version_info.file_version_hi);
     Swap(&module_.version_info.file_version_lo);
     Swap(&module_.version_info.product_version_hi);
     Swap(&module_.version_info.product_version_lo);
     Swap(&module_.version_info.file_flags_mask);
     Swap(&module_.version_info.file_flags);
     Swap(&module_.version_info.file_os);
     Swap(&module_.version_info.file_type);
     Swap(&module_.version_info.file_subtype);
     Swap(&module_.version_info.file_date_hi);
     Swap(&module_.version_info.file_date_lo);
     Swap(&module_.cv_record);
     Swap(&module_.misc_record);
     // Don't swap reserved fields because their contents are unknown (as
     // are their proper widths).
   }
   // Check for base + size overflow or undersize.
   if (module_.size_of_image == 0 ||
       module_.size_of_image >
           numeric_limits<uint64_t>::max() - module_.base_of_image) {
     BPLOG(ERROR) << "MinidumpModule has a module problem, " <<
                     HexString(module_.base_of_image) << "+" <<
                     HexString(module_.size_of_image);
     return false;
   }
   module_valid_ = true;
   return true;
 }
 bool MinidumpModule::ReadAuxiliaryData() {
   if (!module_valid_) {
     BPLOG(ERROR) << "Invalid MinidumpModule for ReadAuxiliaryData";
     return false;
   }
   // Each module must have a name.
   name_ = minidump_->ReadString(module_.module_name_rva);
   if (!name_) {
     BPLOG(ERROR) << "MinidumpModule could not read name";
     return false;
   }
   // At this point, we have enough info for the module to be valid.
   valid_ = true;
   // CodeView and miscellaneous debug records are only required if the
   // module indicates that they exist.
   if (module_.cv_record.data_size && !GetCVRecord(NULL)) {
     BPLOG(ERROR) << "MinidumpModule has no CodeView record, "
                     "but one was expected";
     return false;
   }
   if (module_.misc_record.data_size && !GetMiscRecord(NULL)) {
     BPLOG(ERROR) << "MinidumpModule has no miscellaneous debug record, "
                     "but one was expected";
     return false;
   }
   has_debug_info_ = true;
   return true;
 }
 string MinidumpModule::code_file() const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpModule for code_file";
     return "";
   }
   return *name_;
 }
 string MinidumpModule::code_identifier() const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpModule for code_identifier";
     return "";
   }
   if (!has_debug_info_)
     return "";
   MinidumpSystemInfo *minidump_system_info = minidump_->GetSystemInfo();
   if (!minidump_system_info) {
     BPLOG(ERROR) << "MinidumpModule code_identifier requires "
                     "MinidumpSystemInfo";
     return "";
   }
   const MDRawSystemInfo *raw_system_info = minidump_system_info->system_info();
   if (!raw_system_info) {
     BPLOG(ERROR) << "MinidumpModule code_identifier requires MDRawSystemInfo";
     return "";
   }
   string identifier;
   switch (raw_system_info->platform_id) {
     case MD_OS_WIN32_NT:
     case MD_OS_WIN32_WINDOWS: {
       // Use the same format that the MS symbol server uses in filesystem
       // hierarchies.
       char identifier_string[17];
       snprintf(identifier_string, sizeof(identifier_string), "%08X%x",
                module_.time_date_stamp, module_.size_of_image);
       identifier = identifier_string;
       break;
     }
     case MD_OS_MAC_OS_X:
     case MD_OS_IOS:
     case MD_OS_SOLARIS:
     case MD_OS_ANDROID:
     case MD_OS_LINUX: {
       // TODO(mmentovai): support uuid extension if present, otherwise fall
       // back to version (from LC_ID_DYLIB?), otherwise fall back to something
       // else.
       identifier = "id";
       break;
     }
     default: {
       // Without knowing what OS generated the dump, we can't generate a good
       // identifier.  Return an empty string, signalling failure.
       BPLOG(ERROR) << "MinidumpModule code_identifier requires known platform, "
                       "found " << HexString(raw_system_info->platform_id);
       break;
     }
   }
   return identifier;
 }
 string MinidumpModule::debug_file() const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpModule for debug_file";
     return "";
   }
   if (!has_debug_info_)
     return "";
   string file;
   // Prefer the CodeView record if present.
   if (cv_record_) {
     if (cv_record_signature_ == MD_CVINFOPDB70_SIGNATURE) {
       // It's actually an MDCVInfoPDB70 structure.
       const MDCVInfoPDB70* cv_record_70 =
           reinterpret_cast<const MDCVInfoPDB70*>(&(*cv_record_)[0]);
       assert(cv_record_70->cv_signature == MD_CVINFOPDB70_SIGNATURE);
       // GetCVRecord guarantees pdb_file_name is null-terminated.
       file = reinterpret_cast<const char*>(cv_record_70->pdb_file_name);
     } else if (cv_record_signature_ == MD_CVINFOPDB20_SIGNATURE) {
       // It's actually an MDCVInfoPDB20 structure.
       const MDCVInfoPDB20* cv_record_20 =
           reinterpret_cast<const MDCVInfoPDB20*>(&(*cv_record_)[0]);
       assert(cv_record_20->cv_header.signature == MD_CVINFOPDB20_SIGNATURE);
       // GetCVRecord guarantees pdb_file_name is null-terminated.
       file = reinterpret_cast<const char*>(cv_record_20->pdb_file_name);
     }
     // If there's a CodeView record but it doesn't match a known signature,
     // try the miscellaneous record.
   }
   if (file.empty()) {
     // No usable CodeView record.  Try the miscellaneous debug record.
     if (misc_record_) {
       const MDImageDebugMisc* misc_record =
           reinterpret_cast<const MDImageDebugMisc *>(&(*misc_record_)[0]);
       if (!misc_record->unicode) {
         // If it's not Unicode, just stuff it into the string.  It's unclear
         // if misc_record->data is 0-terminated, so use an explicit size.
         file = string(
             reinterpret_cast<const char*>(misc_record->data),
             module_.misc_record.data_size - MDImageDebugMisc_minsize);
       } else {
         // There's a misc_record but it encodes the debug filename in UTF-16.
         // (Actually, because miscellaneous records are so old, it's probably
         // UCS-2.)  Convert it to UTF-8 for congruity with the other strings
         // that this method (and all other methods in the Minidump family)
         // return.
         unsigned int bytes =
             module_.misc_record.data_size - MDImageDebugMisc_minsize;
         if (bytes % 2 == 0) {
           unsigned int utf16_words = bytes / 2;
           // UTF16ToUTF8 expects a vector<uint16_t>, so create a temporary one
           // and copy the UTF-16 data into it.
           vector<uint16_t> string_utf16(utf16_words);
           if (utf16_words)
             memcpy(&string_utf16[0], &misc_record->data, bytes);
           // GetMiscRecord already byte-swapped the data[] field if it contains
           // UTF-16, so pass false as the swap argument.
           scoped_ptr<string> new_file(UTF16ToUTF8(string_utf16, false));
           file = *new_file;
         }
       }
     }
   }
   // Relatively common case
   BPLOG_IF(INFO, file.empty()) << "MinidumpModule could not determine "
                                   "debug_file for " << *name_;
   return file;
 }
 string MinidumpModule::debug_identifier() const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpModule for debug_identifier";
     return "";
   }
   if (!has_debug_info_)
     return "";
   string identifier;
   // Use the CodeView record if present.
   if (cv_record_) {
     if (cv_record_signature_ == MD_CVINFOPDB70_SIGNATURE) {
       // It's actually an MDCVInfoPDB70 structure.
       const MDCVInfoPDB70* cv_record_70 =
           reinterpret_cast<const MDCVInfoPDB70*>(&(*cv_record_)[0]);
       assert(cv_record_70->cv_signature == MD_CVINFOPDB70_SIGNATURE);
       // Use the same format that the MS symbol server uses in filesystem
       // hierarchies.
       char identifier_string[41];
       snprintf(identifier_string, sizeof(identifier_string),
                "%08X%04X%04X%02X%02X%02X%02X%02X%02X%02X%02X%x",
                cv_record_70->signature.data1,
                cv_record_70->signature.data2,
                cv_record_70->signature.data3,
                cv_record_70->signature.data4[0],
                cv_record_70->signature.data4[1],
                cv_record_70->signature.data4[2],
                cv_record_70->signature.data4[3],
                cv_record_70->signature.data4[4],
                cv_record_70->signature.data4[5],
                cv_record_70->signature.data4[6],
                cv_record_70->signature.data4[7],
                cv_record_70->age);
       identifier = identifier_string;
     } else if (cv_record_signature_ == MD_CVINFOPDB20_SIGNATURE) {
       // It's actually an MDCVInfoPDB20 structure.
       const MDCVInfoPDB20* cv_record_20 =
           reinterpret_cast<const MDCVInfoPDB20*>(&(*cv_record_)[0]);
       assert(cv_record_20->cv_header.signature == MD_CVINFOPDB20_SIGNATURE);
       // Use the same format that the MS symbol server uses in filesystem
       // hierarchies.
       char identifier_string[17];
       snprintf(identifier_string, sizeof(identifier_string),
                "%08X%x", cv_record_20->signature, cv_record_20->age);
       identifier = identifier_string;
     }
   }
   // TODO(mmentovai): if there's no usable CodeView record, there might be a
   // miscellaneous debug record.  It only carries a filename, though, and no
   // identifier.  I'm not sure what the right thing to do for the identifier
   // is in that case, but I don't expect to find many modules without a
   // CodeView record (or some other Breakpad extension structure in place of
   // a CodeView record).  Treat it as an error (empty identifier) for now.
   // TODO(mmentovai): on the Mac, provide fallbacks as in code_identifier().
   // Relatively common case
   BPLOG_IF(INFO, identifier.empty()) << "MinidumpModule could not determine "
                                         "debug_identifier for " << *name_;
   return identifier;
 }
 string MinidumpModule::version() const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpModule for version";
     return "";
   }
   string version;
   if (module_.version_info.signature == MD_VSFIXEDFILEINFO_SIGNATURE &&
       module_.version_info.struct_version & MD_VSFIXEDFILEINFO_VERSION) {
     char version_string[24];
     snprintf(version_string, sizeof(version_string), "%u.%u.%u.%u",
              module_.version_info.file_version_hi >> 16,
              module_.version_info.file_version_hi & 0xffff,
              module_.version_info.file_version_lo >> 16,
              module_.version_info.file_version_lo & 0xffff);
     version = version_string;
   }
   // TODO(mmentovai): possibly support other struct types in place of
   // the one used with MD_VSFIXEDFILEINFO_SIGNATURE.  We can possibly use
   // a different structure that better represents versioning facilities on
   // Mac OS X and Linux, instead of forcing them to adhere to the dotted
   // quad of 16-bit ints that Windows uses.
   BPLOG_IF(INFO, version.empty()) << "MinidumpModule could not determine "
                                      "version for " << *name_;
   return version;
 }
 const CodeModule* MinidumpModule::Copy() const {
   return new BasicCodeModule(this);
 }
 const uint8_t* MinidumpModule::GetCVRecord(uint32_t* size) {
   if (!module_valid_) {
     BPLOG(ERROR) << "Invalid MinidumpModule for GetCVRecord";
     return NULL;
   }
   if (!cv_record_) {
     // This just guards against 0-sized CodeView records; more specific checks
     // are used when the signature is checked against various structure types.
     if (module_.cv_record.data_size == 0) {
       return NULL;
     }
     if (!minidump_->SeekSet(module_.cv_record.rva)) {
       BPLOG(ERROR) << "MinidumpModule could not seek to CodeView record";
       return NULL;
     }
     if (module_.cv_record.data_size > max_cv_bytes_) {
       BPLOG(ERROR) << "MinidumpModule CodeView record size " <<
                       module_.cv_record.data_size << " exceeds maximum " <<
                       max_cv_bytes_;
       return NULL;
     }
     // Allocating something that will be accessed as MDCVInfoPDB70 or
     // MDCVInfoPDB20 but is allocated as uint8_t[] can cause alignment
     // problems.  x86 and ppc are able to cope, though.  This allocation
     // style is needed because the MDCVInfoPDB70 or MDCVInfoPDB20 are
     // variable-sized due to their pdb_file_name fields; these structures
     // are not MDCVInfoPDB70_minsize or MDCVInfoPDB20_minsize and treating
     // them as such would result in incomplete structures or overruns.
     scoped_ptr< vector<uint8_t> > cv_record(
         new vector<uint8_t>(module_.cv_record.data_size));
     if (!minidump_->ReadBytes(&(*cv_record)[0], module_.cv_record.data_size)) {
       BPLOG(ERROR) << "MinidumpModule could not read CodeView record";
       return NULL;
     }
     uint32_t signature = MD_CVINFOUNKNOWN_SIGNATURE;
     if (module_.cv_record.data_size > sizeof(signature)) {
       MDCVInfoPDB70* cv_record_signature =
           reinterpret_cast<MDCVInfoPDB70*>(&(*cv_record)[0]);
       signature = cv_record_signature->cv_signature;
       if (minidump_->swap())
         Swap(&signature);
     }
     if (signature == MD_CVINFOPDB70_SIGNATURE) {
       // Now that the structure type is known, recheck the size.
       if (MDCVInfoPDB70_minsize > module_.cv_record.data_size) {
         BPLOG(ERROR) << "MinidumpModule CodeView7 record size mismatch, " <<
                         MDCVInfoPDB70_minsize << " > " <<
                         module_.cv_record.data_size;
         return NULL;
       }
       if (minidump_->swap()) {
         MDCVInfoPDB70* cv_record_70 =
             reinterpret_cast<MDCVInfoPDB70*>(&(*cv_record)[0]);
         Swap(&cv_record_70->cv_signature);
         Swap(&cv_record_70->signature);
         Swap(&cv_record_70->age);
         // Don't swap cv_record_70.pdb_file_name because it's an array of 8-bit
         // quantities.  (It's a path, is it UTF-8?)
       }
       // The last field of either structure is null-terminated 8-bit character
       // data.  Ensure that it's null-terminated.
       if ((*cv_record)[module_.cv_record.data_size - 1] != '\0') {
         BPLOG(ERROR) << "MinidumpModule CodeView7 record string is not "
                         "0-terminated";
         return NULL;
       }
     } else if (signature == MD_CVINFOPDB20_SIGNATURE) {
       // Now that the structure type is known, recheck the size.
       if (MDCVInfoPDB20_minsize > module_.cv_record.data_size) {
         BPLOG(ERROR) << "MinidumpModule CodeView2 record size mismatch, " <<
                         MDCVInfoPDB20_minsize << " > " <<
                         module_.cv_record.data_size;
         return NULL;
       }
       if (minidump_->swap()) {
         MDCVInfoPDB20* cv_record_20 =
             reinterpret_cast<MDCVInfoPDB20*>(&(*cv_record)[0]);
         Swap(&cv_record_20->cv_header.signature);
         Swap(&cv_record_20->cv_header.offset);
         Swap(&cv_record_20->signature);
         Swap(&cv_record_20->age);
         // Don't swap cv_record_20.pdb_file_name because it's an array of 8-bit
         // quantities.  (It's a path, is it UTF-8?)
       }
       // The last field of either structure is null-terminated 8-bit character
       // data.  Ensure that it's null-terminated.
       if ((*cv_record)[module_.cv_record.data_size - 1] != '\0') {
         BPLOG(ERROR) << "MindumpModule CodeView2 record string is not "
                         "0-terminated";
         return NULL;
       }
     }
     // If the signature doesn't match something above, it's not something
     // that Breakpad can presently handle directly.  Because some modules in
     // the wild contain such CodeView records as MD_CVINFOCV50_SIGNATURE,
     // don't bail out here - allow the data to be returned to the user,
     // although byte-swapping can't be done.
     // Store the vector type because that's how storage was allocated, but
     // return it casted to uint8_t*.
     cv_record_ = cv_record.release();
     cv_record_signature_ = signature;
   }
   if (size)
     *size = module_.cv_record.data_size;
   return &(*cv_record_)[0];
 }
 const MDImageDebugMisc* MinidumpModule::GetMiscRecord(uint32_t* size) {
   if (!module_valid_) {
     BPLOG(ERROR) << "Invalid MinidumpModule for GetMiscRecord";
     return NULL;
   }
   if (!misc_record_) {
     if (module_.misc_record.data_size == 0) {
       return NULL;
     }
     if (MDImageDebugMisc_minsize > module_.misc_record.data_size) {
       BPLOG(ERROR) << "MinidumpModule miscellaneous debugging record "
                       "size mismatch, " << MDImageDebugMisc_minsize << " > " <<
                       module_.misc_record.data_size;
       return NULL;
     }
     if (!minidump_->SeekSet(module_.misc_record.rva)) {
       BPLOG(ERROR) << "MinidumpModule could not seek to miscellaneous "
                       "debugging record";
       return NULL;
     }
     if (module_.misc_record.data_size > max_misc_bytes_) {
       BPLOG(ERROR) << "MinidumpModule miscellaneous debugging record size " <<
                       module_.misc_record.data_size << " exceeds maximum " <<
                       max_misc_bytes_;
       return NULL;
     }
     // Allocating something that will be accessed as MDImageDebugMisc but
     // is allocated as uint8_t[] can cause alignment problems.  x86 and
     // ppc are able to cope, though.  This allocation style is needed
     // because the MDImageDebugMisc is variable-sized due to its data field;
     // this structure is not MDImageDebugMisc_minsize and treating it as such
     // would result in an incomplete structure or an overrun.
     scoped_ptr< vector<uint8_t> > misc_record_mem(
         new vector<uint8_t>(module_.misc_record.data_size));
     MDImageDebugMisc* misc_record =
         reinterpret_cast<MDImageDebugMisc*>(&(*misc_record_mem)[0]);
     if (!minidump_->ReadBytes(misc_record, module_.misc_record.data_size)) {
       BPLOG(ERROR) << "MinidumpModule could not read miscellaneous debugging "
                       "record";
       return NULL;
     }
     if (minidump_->swap()) {
       Swap(&misc_record->data_type);
       Swap(&misc_record->length);
       // Don't swap misc_record.unicode because it's an 8-bit quantity.
       // Don't swap the reserved fields for the same reason, and because
       // they don't contain any valid data.
       if (misc_record->unicode) {
         // There is a potential alignment problem, but shouldn't be a problem
         // in practice due to the layout of MDImageDebugMisc.
         uint16_t* data16 = reinterpret_cast<uint16_t*>(&(misc_record->data));
         unsigned int dataBytes = module_.misc_record.data_size -
                                  MDImageDebugMisc_minsize;
         unsigned int dataLength = dataBytes / 2;
         for (unsigned int characterIndex = 0;
              characterIndex < dataLength;
              ++characterIndex) {
           Swap(&data16[characterIndex]);
         }
       }
     }
     if (module_.misc_record.data_size != misc_record->length) {
       BPLOG(ERROR) << "MinidumpModule miscellaneous debugging record data "
                       "size mismatch, " << module_.misc_record.data_size <<
                       " != " << misc_record->length;
       return NULL;
     }
     // Store the vector type because that's how storage was allocated, but
     // return it casted to MDImageDebugMisc*.
     misc_record_ = misc_record_mem.release();
   }
   if (size)
     *size = module_.misc_record.data_size;
   return reinterpret_cast<MDImageDebugMisc*>(&(*misc_record_)[0]);
 }
 void MinidumpModule::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpModule cannot print invalid data";
     return;
   }
   printf("MDRawModule\n");
   printf("  base_of_image                   = 0x%" PRIx64 "\n",
          module_.base_of_image);
   printf("  size_of_image                   = 0x%x\n",
          module_.size_of_image);
   printf("  checksum                        = 0x%x\n",
          module_.checksum);
   printf("  time_date_stamp                 = 0x%x\n",
          module_.time_date_stamp);
   printf("  module_name_rva                 = 0x%x\n",
          module_.module_name_rva);
   printf("  version_info.signature          = 0x%x\n",
          module_.version_info.signature);
   printf("  version_info.struct_version     = 0x%x\n",
          module_.version_info.struct_version);
   printf("  version_info.file_version       = 0x%x:0x%x\n",
          module_.version_info.file_version_hi,
          module_.version_info.file_version_lo);
   printf("  version_info.product_version    = 0x%x:0x%x\n",
          module_.version_info.product_version_hi,
          module_.version_info.product_version_lo);
   printf("  version_info.file_flags_mask    = 0x%x\n",
          module_.version_info.file_flags_mask);
   printf("  version_info.file_flags         = 0x%x\n",
          module_.version_info.file_flags);
   printf("  version_info.file_os            = 0x%x\n",
          module_.version_info.file_os);
   printf("  version_info.file_type          = 0x%x\n",
          module_.version_info.file_type);
   printf("  version_info.file_subtype       = 0x%x\n",
          module_.version_info.file_subtype);
   printf("  version_info.file_date          = 0x%x:0x%x\n",
          module_.version_info.file_date_hi,
          module_.version_info.file_date_lo);
   printf("  cv_record.data_size             = %d\n",
          module_.cv_record.data_size);
   printf("  cv_record.rva                   = 0x%x\n",
          module_.cv_record.rva);
   printf("  misc_record.data_size           = %d\n",
          module_.misc_record.data_size);
   printf("  misc_record.rva                 = 0x%x\n",
          module_.misc_record.rva);
   printf("  (code_file)                     = \"%s\"\n", code_file().c_str());
   printf("  (code_identifier)               = \"%s\"\n",
          code_identifier().c_str());
   uint32_t cv_record_size;
   const uint8_t *cv_record = GetCVRecord(&cv_record_size);
   if (cv_record) {
     if (cv_record_signature_ == MD_CVINFOPDB70_SIGNATURE) {
       const MDCVInfoPDB70* cv_record_70 =
           reinterpret_cast<const MDCVInfoPDB70*>(cv_record);
       assert(cv_record_70->cv_signature == MD_CVINFOPDB70_SIGNATURE);
       printf("  (cv_record).cv_signature        = 0x%x\n",
              cv_record_70->cv_signature);
       printf("  (cv_record).signature           = %08x-%04x-%04x-%02x%02x-",
              cv_record_70->signature.data1,
              cv_record_70->signature.data2,
              cv_record_70->signature.data3,
              cv_record_70->signature.data4[0],
              cv_record_70->signature.data4[1]);
       for (unsigned int guidIndex = 2;
            guidIndex < 8;
            ++guidIndex) {
         printf("%02x", cv_record_70->signature.data4[guidIndex]);
       }
       printf("\n");
       printf("  (cv_record).age                 = %d\n",
              cv_record_70->age);
       printf("  (cv_record).pdb_file_name       = \"%s\"\n",
              cv_record_70->pdb_file_name);
     } else if (cv_record_signature_ == MD_CVINFOPDB20_SIGNATURE) {
       const MDCVInfoPDB20* cv_record_20 =
           reinterpret_cast<const MDCVInfoPDB20*>(cv_record);
       assert(cv_record_20->cv_header.signature == MD_CVINFOPDB20_SIGNATURE);
       printf("  (cv_record).cv_header.signature = 0x%x\n",
              cv_record_20->cv_header.signature);
       printf("  (cv_record).cv_header.offset    = 0x%x\n",
              cv_record_20->cv_header.offset);
       printf("  (cv_record).signature           = 0x%x\n",
              cv_record_20->signature);
       printf("  (cv_record).age                 = %d\n",
              cv_record_20->age);
       printf("  (cv_record).pdb_file_name       = \"%s\"\n",
              cv_record_20->pdb_file_name);
     } else {
       printf("  (cv_record)                     = ");
       for (unsigned int cv_byte_index = 0;
            cv_byte_index < cv_record_size;
            ++cv_byte_index) {
         printf("%02x", cv_record[cv_byte_index]);
       }
       printf("\n");
     }
   } else {
     printf("  (cv_record)                     = (null)\n");
   }
   const MDImageDebugMisc* misc_record = GetMiscRecord(NULL);
   if (misc_record) {
     printf("  (misc_record).data_type         = 0x%x\n",
            misc_record->data_type);
     printf("  (misc_record).length            = 0x%x\n",
            misc_record->length);
     printf("  (misc_record).unicode           = %d\n",
            misc_record->unicode);
     // Don't bother printing the UTF-16, we don't really even expect to ever
     // see this misc_record anyway.
     if (misc_record->unicode)
       printf("  (misc_record).data              = \"%s\"\n",
              misc_record->data);
     else
       printf("  (misc_record).data              = (UTF-16)\n");
   } else {
     printf("  (misc_record)                   = (null)\n");
   }
   printf("  (debug_file)                    = \"%s\"\n", debug_file().c_str());
   printf("  (debug_identifier)              = \"%s\"\n",
          debug_identifier().c_str());
   printf("  (version)                       = \"%s\"\n", version().c_str());
   printf("\n");
 }
 //
 // MinidumpModuleList
 //
 uint32_t MinidumpModuleList::max_modules_ = 1024;
 MinidumpModuleList::MinidumpModuleList(Minidump* minidump)
     : MinidumpStream(minidump),
       range_map_(new RangeMap<uint64_t, unsigned int>()),
       modules_(NULL),
       module_count_(0) {
 }
 MinidumpModuleList::~MinidumpModuleList() {
   delete range_map_;
   delete modules_;
 }
 bool MinidumpModuleList::Read(uint32_t expected_size) {
   // Invalidate cached data.
   range_map_->Clear();
   delete modules_;
   modules_ = NULL;
   module_count_ = 0;
   valid_ = false;
   uint32_t module_count;
   if (expected_size < sizeof(module_count)) {
     BPLOG(ERROR) << "MinidumpModuleList count size mismatch, " <<
                     expected_size << " < " << sizeof(module_count);
     return false;
   }
   if (!minidump_->ReadBytes(&module_count, sizeof(module_count))) {
     BPLOG(ERROR) << "MinidumpModuleList could not read module count";
     return false;
   }
   if (minidump_->swap())
     Swap(&module_count);
   if (module_count > numeric_limits<uint32_t>::max() / MD_MODULE_SIZE) {
     BPLOG(ERROR) << "MinidumpModuleList module count " << module_count <<
                     " would cause multiplication overflow";
     return false;
   }
   if (expected_size != sizeof(module_count) +
                        module_count * MD_MODULE_SIZE) {
     // may be padded with 4 bytes on 64bit ABIs for alignment
     if (expected_size == sizeof(module_count) + 4 +
                          module_count * MD_MODULE_SIZE) {
       uint32_t useless;
       if (!minidump_->ReadBytes(&useless, 4)) {
         BPLOG(ERROR) << "MinidumpModuleList cannot read modulelist padded bytes";
         return false;
       }
     } else {
       BPLOG(ERROR) << "MinidumpModuleList size mismatch, " << expected_size <<
                       " != " << sizeof(module_count) +
                       module_count * MD_MODULE_SIZE;
       return false;
     }
   }
   if (module_count > max_modules_) {
     BPLOG(ERROR) << "MinidumpModuleList count " << module_count_ <<
                     " exceeds maximum " << max_modules_;
     return false;
   }
   if (module_count != 0) {
     scoped_ptr<MinidumpModules> modules(
         new MinidumpModules(module_count, MinidumpModule(minidump_)));
     for (unsigned int module_index = 0;
          module_index < module_count;
          ++module_index) {
       MinidumpModule* module = &(*modules)[module_index];
       // Assume that the file offset is correct after the last read.
       if (!module->Read()) {
         BPLOG(ERROR) << "MinidumpModuleList could not read module " <<
                         module_index << "/" << module_count;
         return false;
       }
     }
     // Loop through the module list once more to read additional data and
     // build the range map.  This is done in a second pass because
     // MinidumpModule::ReadAuxiliaryData seeks around, and if it were
     // included in the loop above, additional seeks would be needed where
     // none are now to read contiguous data.
     for (unsigned int module_index = 0;
          module_index < module_count;
          ++module_index) {
       MinidumpModule* module = &(*modules)[module_index];
       // ReadAuxiliaryData fails if any data that the module indicates should
       // exist is missing, but we treat some such cases as valid anyway.  See
       // issue #222: if a debugging record is of a format that's too large to
       // handle, it shouldn't render the entire dump invalid.  Check module
       // validity before giving up.
       if (!module->ReadAuxiliaryData() && !module->valid()) {
         BPLOG(ERROR) << "MinidumpModuleList could not read required module "
                         "auxiliary data for module " <<
                         module_index << "/" << module_count;
         return false;
       }
       // It is safe to use module->code_file() after successfully calling
       // module->ReadAuxiliaryData or noting that the module is valid.
       uint64_t base_address = module->base_address();
       uint64_t module_size = module->size();
       if (base_address == static_cast<uint64_t>(-1)) {
         BPLOG(ERROR) << "MinidumpModuleList found bad base address "
                         "for module " << module_index << "/" << module_count <<
                         ", " << module->code_file();
         return false;
       }
       if (!range_map_->StoreRange(base_address, module_size, module_index)) {
         BPLOG(ERROR) << "MinidumpModuleList could not store module " <<
                         module_index << "/" << module_count << ", " <<
                         module->code_file() << ", " <<
                         HexString(base_address) << "+" <<
                         HexString(module_size);
         return false;
       }
     }
     modules_ = modules.release();
   }
   module_count_ = module_count;
   valid_ = true;
   return true;
 }
 const MinidumpModule* MinidumpModuleList::GetModuleForAddress(
     uint64_t address) const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpModuleList for GetModuleForAddress";
     return NULL;
   }
   unsigned int module_index;
   if (!range_map_->RetrieveRange(address, &module_index, NULL, NULL)) {
     BPLOG(INFO) << "MinidumpModuleList has no module at " <<
                    HexString(address);
     return NULL;
   }
   return GetModuleAtIndex(module_index);
 }
 const MinidumpModule* MinidumpModuleList::GetMainModule() const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpModuleList for GetMainModule";
     return NULL;
   }
   // The main code module is the first one present in a minidump file's
   // MDRawModuleList.
   return GetModuleAtIndex(0);
 }
 const MinidumpModule* MinidumpModuleList::GetModuleAtSequence(
     unsigned int sequence) const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpModuleList for GetModuleAtSequence";
     return NULL;
   }
   if (sequence >= module_count_) {
     BPLOG(ERROR) << "MinidumpModuleList sequence out of range: " <<
                     sequence << "/" << module_count_;
     return NULL;
   }
   unsigned int module_index;
   if (!range_map_->RetrieveRangeAtIndex(sequence, &module_index, NULL, NULL)) {
     BPLOG(ERROR) << "MinidumpModuleList has no module at sequence " << sequence;
     return NULL;
   }
   return GetModuleAtIndex(module_index);
 }
 const MinidumpModule* MinidumpModuleList::GetModuleAtIndex(
     unsigned int index) const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpModuleList for GetModuleAtIndex";
     return NULL;
   }
   if (index >= module_count_) {
     BPLOG(ERROR) << "MinidumpModuleList index out of range: " <<
                     index << "/" << module_count_;
     return NULL;
   }
   return &(*modules_)[index];
 }
 const CodeModules* MinidumpModuleList::Copy() const {
   return new BasicCodeModules(this);
 }
 void MinidumpModuleList::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpModuleList cannot print invalid data";
     return;
   }
   printf("MinidumpModuleList\n");
   printf("  module_count = %d\n", module_count_);
   printf("\n");
   for (unsigned int module_index = 0;
        module_index < module_count_;
        ++module_index) {
     printf("module[%d]\n", module_index);
     (*modules_)[module_index].Print();
   }
 }
 //
 // MinidumpMemoryList
 //
 uint32_t MinidumpMemoryList::max_regions_ = 4096;
 MinidumpMemoryList::MinidumpMemoryList(Minidump* minidump)
     : MinidumpStream(minidump),
       range_map_(new RangeMap<uint64_t, unsigned int>()),
       descriptors_(NULL),
       regions_(NULL),
       region_count_(0) {
 }
 MinidumpMemoryList::~MinidumpMemoryList() {
   delete range_map_;
   delete descriptors_;
   delete regions_;
 }
 bool MinidumpMemoryList::Read(uint32_t expected_size) {
   // Invalidate cached data.
   delete descriptors_;
   descriptors_ = NULL;
   delete regions_;
   regions_ = NULL;
   range_map_->Clear();
   region_count_ = 0;
   valid_ = false;
   uint32_t region_count;
   if (expected_size < sizeof(region_count)) {
     BPLOG(ERROR) << "MinidumpMemoryList count size mismatch, " <<
                     expected_size << " < " << sizeof(region_count);
     return false;
   }
   if (!minidump_->ReadBytes(&region_count, sizeof(region_count))) {
     BPLOG(ERROR) << "MinidumpMemoryList could not read memory region count";
     return false;
   }
   if (minidump_->swap())
     Swap(&region_count);
   if (region_count >
           numeric_limits<uint32_t>::max() / sizeof(MDMemoryDescriptor)) {
     BPLOG(ERROR) << "MinidumpMemoryList region count " << region_count <<
                     " would cause multiplication overflow";
     return false;
   }
   if (expected_size != sizeof(region_count) +
                        region_count * sizeof(MDMemoryDescriptor)) {
     // may be padded with 4 bytes on 64bit ABIs for alignment
     if (expected_size == sizeof(region_count) + 4 +
                          region_count * sizeof(MDMemoryDescriptor)) {
       uint32_t useless;
       if (!minidump_->ReadBytes(&useless, 4)) {
         BPLOG(ERROR) << "MinidumpMemoryList cannot read memorylist padded bytes";
         return false;
       }
     } else {
       BPLOG(ERROR) << "MinidumpMemoryList size mismatch, " << expected_size <<
                       " != " << sizeof(region_count) +
                       region_count * sizeof(MDMemoryDescriptor);
       return false;
     }
   }
   if (region_count > max_regions_) {
     BPLOG(ERROR) << "MinidumpMemoryList count " << region_count <<
                     " exceeds maximum " << max_regions_;
     return false;
   }
   if (region_count != 0) {
     scoped_ptr<MemoryDescriptors> descriptors(
         new MemoryDescriptors(region_count));
     // Read the entire array in one fell swoop, instead of reading one entry
     // at a time in the loop.
     if (!minidump_->ReadBytes(&(*descriptors)[0],
                               sizeof(MDMemoryDescriptor) * region_count)) {
       BPLOG(ERROR) << "MinidumpMemoryList could not read memory region list";
       return false;
     }
     scoped_ptr<MemoryRegions> regions(
         new MemoryRegions(region_count, MinidumpMemoryRegion(minidump_)));
     for (unsigned int region_index = 0;
          region_index < region_count;
          ++region_index) {
       MDMemoryDescriptor* descriptor = &(*descriptors)[region_index];
       if (minidump_->swap())
         Swap(descriptor);
       uint64_t base_address = descriptor->start_of_memory_range;
       uint32_t region_size = descriptor->memory.data_size;
       // Check for base + size overflow or undersize.
       if (region_size == 0 ||
           region_size > numeric_limits<uint64_t>::max() - base_address) {
         BPLOG(ERROR) << "MinidumpMemoryList has a memory region problem, " <<
                         " region " << region_index << "/" << region_count <<
                         ", " << HexString(base_address) << "+" <<
                         HexString(region_size);
         return false;
       }
       if (!range_map_->StoreRange(base_address, region_size, region_index)) {
         BPLOG(ERROR) << "MinidumpMemoryList could not store memory region " <<
                         region_index << "/" << region_count << ", " <<
                         HexString(base_address) << "+" <<
                         HexString(region_size);
         return false;
       }
       (*regions)[region_index].SetDescriptor(descriptor);
     }
     descriptors_ = descriptors.release();
     regions_ = regions.release();
   }
   region_count_ = region_count;
   valid_ = true;
   return true;
 }
 MinidumpMemoryRegion* MinidumpMemoryList::GetMemoryRegionAtIndex(
       unsigned int index) {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpMemoryList for GetMemoryRegionAtIndex";
     return NULL;
   }
   if (index >= region_count_) {
     BPLOG(ERROR) << "MinidumpMemoryList index out of range: " <<
                     index << "/" << region_count_;
     return NULL;
   }
   return &(*regions_)[index];
 }
 MinidumpMemoryRegion* MinidumpMemoryList::GetMemoryRegionForAddress(
     uint64_t address) {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpMemoryList for GetMemoryRegionForAddress";
     return NULL;
   }
   unsigned int region_index;
   if (!range_map_->RetrieveRange(address, &region_index, NULL, NULL)) {
     BPLOG(INFO) << "MinidumpMemoryList has no memory region at " <<
                    HexString(address);
     return NULL;
   }
   return GetMemoryRegionAtIndex(region_index);
 }
 void MinidumpMemoryList::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpMemoryList cannot print invalid data";
     return;
   }
   printf("MinidumpMemoryList\n");
   printf("  region_count = %d\n", region_count_);
   printf("\n");
   for (unsigned int region_index = 0;
        region_index < region_count_;
        ++region_index) {
     MDMemoryDescriptor* descriptor = &(*descriptors_)[region_index];
     printf("region[%d]\n", region_index);
     printf("MDMemoryDescriptor\n");
     printf("  start_of_memory_range = 0x%" PRIx64 "\n",
            descriptor->start_of_memory_range);
     printf("  memory.data_size      = 0x%x\n", descriptor->memory.data_size);
     printf("  memory.rva            = 0x%x\n", descriptor->memory.rva);
     MinidumpMemoryRegion* region = GetMemoryRegionAtIndex(region_index);
     if (region) {
       printf("Memory\n");
       region->Print();
     } else {
       printf("No memory\n");
     }
     printf("\n");
   }
 }
 //
 // MinidumpException
 //
 MinidumpException::MinidumpException(Minidump* minidump)
     : MinidumpStream(minidump),
       exception_(),
       context_(NULL) {
 }
 MinidumpException::~MinidumpException() {
   delete context_;
 }
 bool MinidumpException::Read(uint32_t expected_size) {
   // Invalidate cached data.
   delete context_;
   context_ = NULL;
   valid_ = false;
   if (expected_size != sizeof(exception_)) {
     BPLOG(ERROR) << "MinidumpException size mismatch, " << expected_size <<
                     " != " << sizeof(exception_);
     return false;
   }
   if (!minidump_->ReadBytes(&exception_, sizeof(exception_))) {
     BPLOG(ERROR) << "MinidumpException cannot read exception";
     return false;
   }
   if (minidump_->swap()) {
     Swap(&exception_.thread_id);
     // exception_.__align is for alignment only and does not need to be
     // swapped.
     Swap(&exception_.exception_record.exception_code);
     Swap(&exception_.exception_record.exception_flags);
     Swap(&exception_.exception_record.exception_record);
     Swap(&exception_.exception_record.exception_address);
     Swap(&exception_.exception_record.number_parameters);
     // exception_.exception_record.__align is for alignment only and does not
     // need to be swapped.
     for (unsigned int parameter_index = 0;
          parameter_index < MD_EXCEPTION_MAXIMUM_PARAMETERS;
          ++parameter_index) {
       Swap(&exception_.exception_record.exception_information[parameter_index]);
     }
     Swap(&exception_.thread_context);
   }
   valid_ = true;
   return true;
 }
 bool MinidumpException::GetThreadID(uint32_t *thread_id) const {
   BPLOG_IF(ERROR, !thread_id) << "MinidumpException::GetThreadID requires "
                                  "|thread_id|";
   assert(thread_id);
   *thread_id = 0;
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpException for GetThreadID";
     return false;
   }
   *thread_id = exception_.thread_id;
   return true;
 }
 MinidumpContext* MinidumpException::GetContext() {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpException for GetContext";
     return NULL;
   }
   if (!context_) {
     if (!minidump_->SeekSet(exception_.thread_context.rva)) {
       BPLOG(ERROR) << "MinidumpException cannot seek to context";
       return NULL;
     }
     scoped_ptr<MinidumpContext> context(new MinidumpContext(minidump_));
     // Don't log as an error if we can still fall back on the thread's context
     // (which must be possible if we got this far.)
     if (!context->Read(exception_.thread_context.data_size)) {
       BPLOG(INFO) << "MinidumpException cannot read context";
       return NULL;
     }
     context_ = context.release();
   }
   return context_;
 }
 void MinidumpException::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpException cannot print invalid data";
     return;
   }
   printf("MDException\n");
   printf("  thread_id                                  = 0x%x\n",
          exception_.thread_id);
   printf("  exception_record.exception_code            = 0x%x\n",
          exception_.exception_record.exception_code);
   printf("  exception_record.exception_flags           = 0x%x\n",
          exception_.exception_record.exception_flags);
   printf("  exception_record.exception_record          = 0x%" PRIx64 "\n",
          exception_.exception_record.exception_record);
   printf("  exception_record.exception_address         = 0x%" PRIx64 "\n",
          exception_.exception_record.exception_address);
   printf("  exception_record.number_parameters         = %d\n",
          exception_.exception_record.number_parameters);
   for (unsigned int parameterIndex = 0;
        parameterIndex < exception_.exception_record.number_parameters;
        ++parameterIndex) {
     printf("  exception_record.exception_information[%2d] = 0x%" PRIx64 "\n",
            parameterIndex,
            exception_.exception_record.exception_information[parameterIndex]);
   }
   printf("  thread_context.data_size                   = %d\n",
          exception_.thread_context.data_size);
   printf("  thread_context.rva                         = 0x%x\n",
          exception_.thread_context.rva);
   MinidumpContext* context = GetContext();
   if (context) {
     printf("\n");
     context->Print();
   } else {
     printf("  (no context)\n");
     printf("\n");
   }
 }
 //
 // MinidumpAssertion
 //
 MinidumpAssertion::MinidumpAssertion(Minidump* minidump)
     : MinidumpStream(minidump),
       assertion_(),
       expression_(),
       function_(),
       file_() {
 }
 MinidumpAssertion::~MinidumpAssertion() {
 }
 bool MinidumpAssertion::Read(uint32_t expected_size) {
   // Invalidate cached data.
   valid_ = false;
   if (expected_size != sizeof(assertion_)) {
     BPLOG(ERROR) << "MinidumpAssertion size mismatch, " << expected_size <<
                     " != " << sizeof(assertion_);
     return false;
   }
   if (!minidump_->ReadBytes(&assertion_, sizeof(assertion_))) {
     BPLOG(ERROR) << "MinidumpAssertion cannot read assertion";
     return false;
   }
   // Each of {expression, function, file} is a UTF-16 string,
   // we'll convert them to UTF-8 for ease of use.
   // expression
   // Since we don't have an explicit byte length for each string,
   // we use UTF16codeunits to calculate word length, then derive byte
   // length from that.
   uint32_t word_length = UTF16codeunits(assertion_.expression,
                                          sizeof(assertion_.expression));
   if (word_length > 0) {
     uint32_t byte_length = word_length * 2;
     vector<uint16_t> expression_utf16(word_length);
     memcpy(&expression_utf16[0], &assertion_.expression[0], byte_length);
     scoped_ptr<string> new_expression(UTF16ToUTF8(expression_utf16,
                                                   minidump_->swap()));
     if (new_expression.get())
       expression_ = *new_expression;
   }
   // assertion
   word_length = UTF16codeunits(assertion_.function,
                                sizeof(assertion_.function));
   if (word_length) {
     uint32_t byte_length = word_length * 2;
     vector<uint16_t> function_utf16(word_length);
     memcpy(&function_utf16[0], &assertion_.function[0], byte_length);
     scoped_ptr<string> new_function(UTF16ToUTF8(function_utf16,
                                                 minidump_->swap()));
     if (new_function.get())
       function_ = *new_function;
   }
   // file
   word_length = UTF16codeunits(assertion_.file,
                                sizeof(assertion_.file));
   if (word_length > 0) {
     uint32_t byte_length = word_length * 2;
     vector<uint16_t> file_utf16(word_length);
     memcpy(&file_utf16[0], &assertion_.file[0], byte_length);
     scoped_ptr<string> new_file(UTF16ToUTF8(file_utf16,
                                             minidump_->swap()));
     if (new_file.get())
       file_ = *new_file;
   }
   if (minidump_->swap()) {
     Swap(&assertion_.line);
     Swap(&assertion_.type);
   }
   valid_ = true;
   return true;
 }
 void MinidumpAssertion::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpAssertion cannot print invalid data";
     return;
   }
   printf("MDAssertion\n");
   printf("  expression                                 = %s\n",
          expression_.c_str());
   printf("  function                                   = %s\n",
          function_.c_str());
   printf("  file                                       = %s\n",
          file_.c_str());
   printf("  line                                       = %u\n",
          assertion_.line);
   printf("  type                                       = %u\n",
          assertion_.type);
   printf("\n");
 }
 //
 // MinidumpSystemInfo
 //
 MinidumpSystemInfo::MinidumpSystemInfo(Minidump* minidump)
     : MinidumpStream(minidump),
       system_info_(),
       csd_version_(NULL),
       cpu_vendor_(NULL) {
 }
 MinidumpSystemInfo::~MinidumpSystemInfo() {
   delete csd_version_;
   delete cpu_vendor_;
 }
 bool MinidumpSystemInfo::Read(uint32_t expected_size) {
   // Invalidate cached data.
   delete csd_version_;
   csd_version_ = NULL;
   delete cpu_vendor_;
   cpu_vendor_ = NULL;
   valid_ = false;
   if (expected_size != sizeof(system_info_)) {
     BPLOG(ERROR) << "MinidumpSystemInfo size mismatch, " << expected_size <<
                     " != " << sizeof(system_info_);
     return false;
   }
   if (!minidump_->ReadBytes(&system_info_, sizeof(system_info_))) {
     BPLOG(ERROR) << "MinidumpSystemInfo cannot read system info";
     return false;
   }
   if (minidump_->swap()) {
     Swap(&system_info_.processor_architecture);
     Swap(&system_info_.processor_level);
     Swap(&system_info_.processor_revision);
     // number_of_processors and product_type are 8-bit quantities and need no
     // swapping.
     Swap(&system_info_.major_version);
     Swap(&system_info_.minor_version);
     Swap(&system_info_.build_number);
     Swap(&system_info_.platform_id);
     Swap(&system_info_.csd_version_rva);
     Swap(&system_info_.suite_mask);
     // Don't swap the reserved2 field because its contents are unknown.
     if (system_info_.processor_architecture == MD_CPU_ARCHITECTURE_X86 ||
         system_info_.processor_architecture == MD_CPU_ARCHITECTURE_X86_WIN64) {
       for (unsigned int i = 0; i < 3; ++i)
         Swap(&system_info_.cpu.x86_cpu_info.vendor_id[i]);
       Swap(&system_info_.cpu.x86_cpu_info.version_information);
       Swap(&system_info_.cpu.x86_cpu_info.feature_information);
       Swap(&system_info_.cpu.x86_cpu_info.amd_extended_cpu_features);
     } else {
       for (unsigned int i = 0; i < 2; ++i)
         Swap(&system_info_.cpu.other_cpu_info.processor_features[i]);
     }
   }
   valid_ = true;
   return true;
 }
 string MinidumpSystemInfo::GetOS() {
   string os;
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpSystemInfo for GetOS";
     return os;
   }
   switch (system_info_.platform_id) {
     case MD_OS_WIN32_NT:
     case MD_OS_WIN32_WINDOWS:
       os = "windows";
       break;
     case MD_OS_MAC_OS_X:
       os = "mac";
       break;
     case MD_OS_IOS:
       os = "ios";
       break;
     case MD_OS_LINUX:
       os = "linux";
       break;
     case MD_OS_SOLARIS:
       os = "solaris";
       break;
     case MD_OS_ANDROID:
       os = "android";
       break;
     default:
       BPLOG(ERROR) << "MinidumpSystemInfo unknown OS for platform " <<
                       HexString(system_info_.platform_id);
       break;
   }
   return os;
 }
 string MinidumpSystemInfo::GetCPU() {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpSystemInfo for GetCPU";
     return "";
   }
   string cpu;
   switch (system_info_.processor_architecture) {
     case MD_CPU_ARCHITECTURE_X86:
     case MD_CPU_ARCHITECTURE_X86_WIN64:
       cpu = "x86";
       break;
     case MD_CPU_ARCHITECTURE_AMD64:
       cpu = "x86-64";
       break;
     case MD_CPU_ARCHITECTURE_PPC:
       cpu = "ppc";
       break;
     case MD_CPU_ARCHITECTURE_SPARC:
       cpu = "sparc";
       break;
     case MD_CPU_ARCHITECTURE_ARM:
       cpu = "arm";
       break;
     default:
       BPLOG(ERROR) << "MinidumpSystemInfo unknown CPU for architecture " <<
                       HexString(system_info_.processor_architecture);
       break;
   }
   return cpu;
 }
 const string* MinidumpSystemInfo::GetCSDVersion() {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpSystemInfo for GetCSDVersion";
     return NULL;
   }
   if (!csd_version_)
     csd_version_ = minidump_->ReadString(system_info_.csd_version_rva);
   BPLOG_IF(ERROR, !csd_version_) << "MinidumpSystemInfo could not read "
                                     "CSD version";
   return csd_version_;
 }
 const string* MinidumpSystemInfo::GetCPUVendor() {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpSystemInfo for GetCPUVendor";
     return NULL;
   }
   // CPU vendor information can only be determined from x86 minidumps.
   if (!cpu_vendor_ &&
       (system_info_.processor_architecture == MD_CPU_ARCHITECTURE_X86 ||
        system_info_.processor_architecture == MD_CPU_ARCHITECTURE_X86_WIN64)) {
     char cpu_vendor_string[13];
     snprintf(cpu_vendor_string, sizeof(cpu_vendor_string),
              "%c%c%c%c%c%c%c%c%c%c%c%c",
               system_info_.cpu.x86_cpu_info.vendor_id[0] & 0xff,
              (system_info_.cpu.x86_cpu_info.vendor_id[0] >> 8) & 0xff,
              (system_info_.cpu.x86_cpu_info.vendor_id[0] >> 16) & 0xff,
              (system_info_.cpu.x86_cpu_info.vendor_id[0] >> 24) & 0xff,
               system_info_.cpu.x86_cpu_info.vendor_id[1] & 0xff,
              (system_info_.cpu.x86_cpu_info.vendor_id[1] >> 8) & 0xff,
              (system_info_.cpu.x86_cpu_info.vendor_id[1] >> 16) & 0xff,
              (system_info_.cpu.x86_cpu_info.vendor_id[1] >> 24) & 0xff,
               system_info_.cpu.x86_cpu_info.vendor_id[2] & 0xff,
              (system_info_.cpu.x86_cpu_info.vendor_id[2] >> 8) & 0xff,
              (system_info_.cpu.x86_cpu_info.vendor_id[2] >> 16) & 0xff,
              (system_info_.cpu.x86_cpu_info.vendor_id[2] >> 24) & 0xff);
     cpu_vendor_ = new string(cpu_vendor_string);
   }
   return cpu_vendor_;
 }
 void MinidumpSystemInfo::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpSystemInfo cannot print invalid data";
     return;
   }
   printf("MDRawSystemInfo\n");
   printf("  processor_architecture                     = %d\n",
          system_info_.processor_architecture);
   printf("  processor_level                            = %d\n",
          system_info_.processor_level);
   printf("  processor_revision                         = 0x%x\n",
          system_info_.processor_revision);
   printf("  number_of_processors                       = %d\n",
          system_info_.number_of_processors);
   printf("  product_type                               = %d\n",
          system_info_.product_type);
   printf("  major_version                              = %d\n",
          system_info_.major_version);
   printf("  minor_version                              = %d\n",
          system_info_.minor_version);
   printf("  build_number                               = %d\n",
          system_info_.build_number);
   printf("  platform_id                                = %d\n",
          system_info_.platform_id);
   printf("  csd_version_rva                            = 0x%x\n",
          system_info_.csd_version_rva);
   printf("  suite_mask                                 = 0x%x\n",
          system_info_.suite_mask);
   for (unsigned int i = 0; i < 3; ++i) {
     printf("  cpu.x86_cpu_info.vendor_id[%d]              = 0x%x\n",
            i, system_info_.cpu.x86_cpu_info.vendor_id[i]);
   }
   printf("  cpu.x86_cpu_info.version_information       = 0x%x\n",
          system_info_.cpu.x86_cpu_info.version_information);
   printf("  cpu.x86_cpu_info.feature_information       = 0x%x\n",
          system_info_.cpu.x86_cpu_info.feature_information);
   printf("  cpu.x86_cpu_info.amd_extended_cpu_features = 0x%x\n",
          system_info_.cpu.x86_cpu_info.amd_extended_cpu_features);
   const string* csd_version = GetCSDVersion();
   if (csd_version) {
     printf("  (csd_version)                              = \"%s\"\n",
            csd_version->c_str());
   } else {
     printf("  (csd_version)                              = (null)\n");
   }
   const string* cpu_vendor = GetCPUVendor();
   if (cpu_vendor) {
     printf("  (cpu_vendor)                               = \"%s\"\n",
            cpu_vendor->c_str());
   } else {
     printf("  (cpu_vendor)                               = (null)\n");
   }
   printf("\n");
 }
 //
 // MinidumpMiscInfo
 //
 MinidumpMiscInfo::MinidumpMiscInfo(Minidump* minidump)
     : MinidumpStream(minidump),
       misc_info_() {
 }
 bool MinidumpMiscInfo::Read(uint32_t expected_size) {
   valid_ = false;
   if (expected_size != MD_MISCINFO_SIZE &&
       expected_size != MD_MISCINFO2_SIZE) {
     BPLOG(ERROR) << "MinidumpMiscInfo size mismatch, " << expected_size <<
                     " != " << MD_MISCINFO_SIZE << ", " << MD_MISCINFO2_SIZE <<
                     ")";
     return false;
   }
   if (!minidump_->ReadBytes(&misc_info_, expected_size)) {
     BPLOG(ERROR) << "MinidumpMiscInfo cannot read miscellaneous info";
     return false;
   }
   if (minidump_->swap()) {
     Swap(&misc_info_.size_of_info);
     Swap(&misc_info_.flags1);
     Swap(&misc_info_.process_id);
     Swap(&misc_info_.process_create_time);
     Swap(&misc_info_.process_user_time);
     Swap(&misc_info_.process_kernel_time);
     if (misc_info_.size_of_info > MD_MISCINFO_SIZE) {
       Swap(&misc_info_.processor_max_mhz);
       Swap(&misc_info_.processor_current_mhz);
       Swap(&misc_info_.processor_mhz_limit);
       Swap(&misc_info_.processor_max_idle_state);
       Swap(&misc_info_.processor_current_idle_state);
     }
   }
   if (expected_size != misc_info_.size_of_info) {
     BPLOG(ERROR) << "MinidumpMiscInfo size mismatch, " <<
                     expected_size << " != " << misc_info_.size_of_info;
     return false;
   }
   valid_ = true;
   return true;
 }
 void MinidumpMiscInfo::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpMiscInfo cannot print invalid data";
     return;
   }
   printf("MDRawMiscInfo\n");
   printf("  size_of_info                 = %d\n",   misc_info_.size_of_info);
   printf("  flags1                       = 0x%x\n", misc_info_.flags1);
   printf("  process_id                   = 0x%x\n", misc_info_.process_id);
   printf("  process_create_time          = 0x%x\n",
          misc_info_.process_create_time);
   printf("  process_user_time            = 0x%x\n",
          misc_info_.process_user_time);
   printf("  process_kernel_time          = 0x%x\n",
          misc_info_.process_kernel_time);
   if (misc_info_.size_of_info > MD_MISCINFO_SIZE) {
     printf("  processor_max_mhz            = %d\n",
            misc_info_.processor_max_mhz);
     printf("  processor_current_mhz        = %d\n",
            misc_info_.processor_current_mhz);
     printf("  processor_mhz_limit          = %d\n",
            misc_info_.processor_mhz_limit);
     printf("  processor_max_idle_state     = 0x%x\n",
            misc_info_.processor_max_idle_state);
     printf("  processor_current_idle_state = 0x%x\n",
            misc_info_.processor_current_idle_state);
   }
   printf("\n");
 }
 //
 // MinidumpBreakpadInfo
 //
 MinidumpBreakpadInfo::MinidumpBreakpadInfo(Minidump* minidump)
     : MinidumpStream(minidump),
       breakpad_info_() {
 }
 bool MinidumpBreakpadInfo::Read(uint32_t expected_size) {
   valid_ = false;
   if (expected_size != sizeof(breakpad_info_)) {
     BPLOG(ERROR) << "MinidumpBreakpadInfo size mismatch, " << expected_size <<
                     " != " << sizeof(breakpad_info_);
     return false;
   }
   if (!minidump_->ReadBytes(&breakpad_info_, sizeof(breakpad_info_))) {
     BPLOG(ERROR) << "MinidumpBreakpadInfo cannot read Breakpad info";
     return false;
   }
   if (minidump_->swap()) {
     Swap(&breakpad_info_.validity);
     Swap(&breakpad_info_.dump_thread_id);
     Swap(&breakpad_info_.requesting_thread_id);
   }
   valid_ = true;
   return true;
 }
 bool MinidumpBreakpadInfo::GetDumpThreadID(uint32_t *thread_id) const {
   BPLOG_IF(ERROR, !thread_id) << "MinidumpBreakpadInfo::GetDumpThreadID "
                                  "requires |thread_id|";
   assert(thread_id);
   *thread_id = 0;
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpBreakpadInfo for GetDumpThreadID";
     return false;
   }
   if (!(breakpad_info_.validity & MD_BREAKPAD_INFO_VALID_DUMP_THREAD_ID)) {
     BPLOG(INFO) << "MinidumpBreakpadInfo has no dump thread";
     return false;
   }
   *thread_id = breakpad_info_.dump_thread_id;
   return true;
 }
 bool MinidumpBreakpadInfo::GetRequestingThreadID(uint32_t *thread_id)
     const {
   BPLOG_IF(ERROR, !thread_id) << "MinidumpBreakpadInfo::GetRequestingThreadID "
                                  "requires |thread_id|";
   assert(thread_id);
   *thread_id = 0;
   if (!thread_id || !valid_) {
     BPLOG(ERROR) << "Invalid MinidumpBreakpadInfo for GetRequestingThreadID";
     return false;
   }
   if (!(breakpad_info_.validity &
             MD_BREAKPAD_INFO_VALID_REQUESTING_THREAD_ID)) {
     BPLOG(INFO) << "MinidumpBreakpadInfo has no requesting thread";
     return false;
   }
   *thread_id = breakpad_info_.requesting_thread_id;
   return true;
 }
 void MinidumpBreakpadInfo::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpBreakpadInfo cannot print invalid data";
     return;
   }
   printf("MDRawBreakpadInfo\n");
   printf("  validity             = 0x%x\n", breakpad_info_.validity);
   if (breakpad_info_.validity & MD_BREAKPAD_INFO_VALID_DUMP_THREAD_ID) {
     printf("  dump_thread_id       = 0x%x\n", breakpad_info_.dump_thread_id);
   } else {
     printf("  dump_thread_id       = (invalid)\n");
   }
   if (breakpad_info_.validity & MD_BREAKPAD_INFO_VALID_DUMP_THREAD_ID) {
     printf("  requesting_thread_id = 0x%x\n",
            breakpad_info_.requesting_thread_id);
   } else {
     printf("  requesting_thread_id = (invalid)\n");
   }
   printf("\n");
 }
 //
 // MinidumpMemoryInfo
 //
 MinidumpMemoryInfo::MinidumpMemoryInfo(Minidump* minidump)
     : MinidumpObject(minidump),
       memory_info_() {
 }
 bool MinidumpMemoryInfo::IsExecutable() const {
   uint32_t protection =
       memory_info_.protection & MD_MEMORY_PROTECTION_ACCESS_MASK;
   return protection == MD_MEMORY_PROTECT_EXECUTE ||
       protection == MD_MEMORY_PROTECT_EXECUTE_READ ||
       protection == MD_MEMORY_PROTECT_EXECUTE_READWRITE;
 }
 bool MinidumpMemoryInfo::IsWritable() const {
   uint32_t protection =
       memory_info_.protection & MD_MEMORY_PROTECTION_ACCESS_MASK;
   return protection == MD_MEMORY_PROTECT_READWRITE ||
     protection == MD_MEMORY_PROTECT_WRITECOPY ||
     protection == MD_MEMORY_PROTECT_EXECUTE_READWRITE ||
     protection == MD_MEMORY_PROTECT_EXECUTE_WRITECOPY;
 }
 bool MinidumpMemoryInfo::Read() {
   valid_ = false;
   if (!minidump_->ReadBytes(&memory_info_, sizeof(memory_info_))) {
     BPLOG(ERROR) << "MinidumpMemoryInfo cannot read memory info";
     return false;
   }
   if (minidump_->swap()) {
     Swap(&memory_info_.base_address);
     Swap(&memory_info_.allocation_base);
     Swap(&memory_info_.allocation_protection);
     Swap(&memory_info_.region_size);
     Swap(&memory_info_.state);
     Swap(&memory_info_.protection);
     Swap(&memory_info_.type);
   }
   // Check for base + size overflow or undersize.
   if (memory_info_.region_size == 0 ||
       memory_info_.region_size > numeric_limits<uint64_t>::max() -
                                      memory_info_.base_address) {
     BPLOG(ERROR) << "MinidumpMemoryInfo has a memory region problem, " <<
                     HexString(memory_info_.base_address) << "+" <<
                     HexString(memory_info_.region_size);
     return false;
   }
   valid_ = true;
   return true;
 }
 void MinidumpMemoryInfo::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpMemoryInfo cannot print invalid data";
     return;
   }
   printf("MDRawMemoryInfo\n");
   printf("  base_address          = 0x%" PRIx64 "\n",
          memory_info_.base_address);
   printf("  allocation_base       = 0x%" PRIx64 "\n",
          memory_info_.allocation_base);
   printf("  allocation_protection = 0x%x\n",
          memory_info_.allocation_protection);
   printf("  region_size           = 0x%" PRIx64 "\n", memory_info_.region_size);
   printf("  state                 = 0x%x\n", memory_info_.state);
   printf("  protection            = 0x%x\n", memory_info_.protection);
   printf("  type                  = 0x%x\n", memory_info_.type);
 }
 //
 // MinidumpMemoryInfoList
 //
 MinidumpMemoryInfoList::MinidumpMemoryInfoList(Minidump* minidump)
     : MinidumpStream(minidump),
       range_map_(new RangeMap<uint64_t, unsigned int>()),
       infos_(NULL),
       info_count_(0) {
 }
 MinidumpMemoryInfoList::~MinidumpMemoryInfoList() {
   delete range_map_;
   delete infos_;
 }
 bool MinidumpMemoryInfoList::Read(uint32_t expected_size) {
   // Invalidate cached data.
   delete infos_;
   infos_ = NULL;
   range_map_->Clear();
   info_count_ = 0;
   valid_ = false;
   MDRawMemoryInfoList header;
   if (expected_size < sizeof(MDRawMemoryInfoList)) {
     BPLOG(ERROR) << "MinidumpMemoryInfoList header size mismatch, " <<
                     expected_size << " < " << sizeof(MDRawMemoryInfoList);
     return false;
   }
   if (!minidump_->ReadBytes(&header, sizeof(header))) {
     BPLOG(ERROR) << "MinidumpMemoryInfoList could not read header";
     return false;
   }
   if (minidump_->swap()) {
     Swap(&header.size_of_header);
     Swap(&header.size_of_entry);
     Swap(&header.number_of_entries);
   }
   // Sanity check that the header is the expected size.
   //TODO(ted): could possibly handle this more gracefully, assuming
   // that future versions of the structs would be backwards-compatible.
   if (header.size_of_header != sizeof(MDRawMemoryInfoList)) {
     BPLOG(ERROR) << "MinidumpMemoryInfoList header size mismatch, " <<
                     header.size_of_header << " != " <<
                     sizeof(MDRawMemoryInfoList);
     return false;
   }
   // Sanity check that the entries are the expected size.
   if (header.size_of_entry != sizeof(MDRawMemoryInfo)) {
     BPLOG(ERROR) << "MinidumpMemoryInfoList entry size mismatch, " <<
                     header.size_of_entry << " != " <<
                     sizeof(MDRawMemoryInfo);
     return false;
   }
   if (header.number_of_entries >
           numeric_limits<uint32_t>::max() / sizeof(MDRawMemoryInfo)) {
     BPLOG(ERROR) << "MinidumpMemoryInfoList info count " <<
                     header.number_of_entries <<
                     " would cause multiplication overflow";
     return false;
   }
   if (expected_size != sizeof(MDRawMemoryInfoList) +
                         header.number_of_entries * sizeof(MDRawMemoryInfo)) {
     BPLOG(ERROR) << "MinidumpMemoryInfoList size mismatch, " << expected_size <<
                     " != " << sizeof(MDRawMemoryInfoList) +
                         header.number_of_entries * sizeof(MDRawMemoryInfo);
     return false;
   }
   if (header.number_of_entries != 0) {
     scoped_ptr<MinidumpMemoryInfos> infos(
         new MinidumpMemoryInfos(header.number_of_entries,
                                 MinidumpMemoryInfo(minidump_)));
     for (unsigned int index = 0;
          index < header.number_of_entries;
          ++index) {
       MinidumpMemoryInfo* info = &(*infos)[index];
       // Assume that the file offset is correct after the last read.
       if (!info->Read()) {
         BPLOG(ERROR) << "MinidumpMemoryInfoList cannot read info " <<
                         index << "/" << header.number_of_entries;
         return false;
       }
       uint64_t base_address = info->GetBase();
       uint32_t region_size = info->GetSize();
       if (!range_map_->StoreRange(base_address, region_size, index)) {
         BPLOG(ERROR) << "MinidumpMemoryInfoList could not store"
                         " memory region " <<
                         index << "/" << header.number_of_entries << ", " <<
                         HexString(base_address) << "+" <<
                         HexString(region_size);
         return false;
       }
     }
     infos_ = infos.release();
   }
   info_count_ = header.number_of_entries;
   valid_ = true;
   return true;
 }
 const MinidumpMemoryInfo* MinidumpMemoryInfoList::GetMemoryInfoAtIndex(
       unsigned int index) const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpMemoryInfoList for GetMemoryInfoAtIndex";
     return NULL;
   }
   if (index >= info_count_) {
     BPLOG(ERROR) << "MinidumpMemoryInfoList index out of range: " <<
                     index << "/" << info_count_;
     return NULL;
   }
   return &(*infos_)[index];
 }
 const MinidumpMemoryInfo* MinidumpMemoryInfoList::GetMemoryInfoForAddress(
     uint64_t address) const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid MinidumpMemoryInfoList for"
                     " GetMemoryInfoForAddress";
     return NULL;
   }
   unsigned int info_index;
   if (!range_map_->RetrieveRange(address, &info_index, NULL, NULL)) {
     BPLOG(INFO) << "MinidumpMemoryInfoList has no memory info at " <<
                    HexString(address);
     return NULL;
   }
   return GetMemoryInfoAtIndex(info_index);
 }
 void MinidumpMemoryInfoList::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "MinidumpMemoryInfoList cannot print invalid data";
     return;
   }
   printf("MinidumpMemoryInfoList\n");
   printf("  info_count = %d\n", info_count_);
   printf("\n");
   for (unsigned int info_index = 0;
        info_index < info_count_;
        ++info_index) {
     printf("info[%d]\n", info_index);
     (*infos_)[info_index].Print();
     printf("\n");
   }
 }
 //
 // Minidump
 //
 uint32_t Minidump::max_streams_ = 128;
 unsigned int Minidump::max_string_length_ = 1024;
 Minidump::Minidump(const string& path)
     : header_(),
       directory_(NULL),
       stream_map_(new MinidumpStreamMap()),
       path_(path),
       stream_(NULL),
       swap_(false),
       valid_(false) {
 }
 Minidump::Minidump(istream& stream)
     : header_(),
       directory_(NULL),
       stream_map_(new MinidumpStreamMap()),
       path_(),
       stream_(&stream),
       swap_(false),
       valid_(false) {
 }
 Minidump::~Minidump() {
   if (stream_) {
     BPLOG(INFO) << "Minidump closing minidump";
   }
   if (!path_.empty()) {
     delete stream_;
   }
   delete directory_;
   delete stream_map_;
 }
 bool Minidump::Open() {
   if (stream_ != NULL) {
     BPLOG(INFO) << "Minidump reopening minidump " << path_;
     // The file is already open.  Seek to the beginning, which is the position
     // the file would be at if it were opened anew.
     return SeekSet(0);
   }
   stream_ = new ifstream(path_.c_str(), std::ios::in | std::ios::binary);
   if (!stream_ || !stream_->good()) {
     string error_string;
     int error_code = ErrnoString(&error_string);
     BPLOG(ERROR) << "Minidump could not open minidump " << path_ <<
                     ", error " << error_code << ": " << error_string;
     return false;
   }
   BPLOG(INFO) << "Minidump opened minidump " << path_;
   return true;
 }
 bool Minidump::GetContextCPUFlagsFromSystemInfo(uint32_t *context_cpu_flags) {
   // Initialize output parameters
   *context_cpu_flags = 0;
   // Save the current stream position
   off_t saved_position = Tell();
   if (saved_position == -1) {
     // Failed to save the current stream position.
     // Returns true because the current position of the stream is preserved.
     return true;
   }
   const MDRawSystemInfo* system_info =
     GetSystemInfo() ? GetSystemInfo()->system_info() : NULL;
   if (system_info != NULL) {
     switch (system_info->processor_architecture) {
       case MD_CPU_ARCHITECTURE_X86:
         *context_cpu_flags = MD_CONTEXT_X86;
         break;
       case MD_CPU_ARCHITECTURE_MIPS:
         *context_cpu_flags = MD_CONTEXT_MIPS;
         break;
       case MD_CPU_ARCHITECTURE_ALPHA:
         *context_cpu_flags = MD_CONTEXT_ALPHA;
         break;
       case MD_CPU_ARCHITECTURE_PPC:
         *context_cpu_flags = MD_CONTEXT_PPC;
         break;
       case MD_CPU_ARCHITECTURE_SHX:
         *context_cpu_flags = MD_CONTEXT_SHX;
         break;
       case MD_CPU_ARCHITECTURE_ARM:
         *context_cpu_flags = MD_CONTEXT_ARM;
         break;
       case MD_CPU_ARCHITECTURE_IA64:
         *context_cpu_flags = MD_CONTEXT_IA64;
         break;
       case MD_CPU_ARCHITECTURE_ALPHA64:
         *context_cpu_flags = 0;
         break;
       case MD_CPU_ARCHITECTURE_MSIL:
         *context_cpu_flags = 0;
         break;
       case MD_CPU_ARCHITECTURE_AMD64:
         *context_cpu_flags = MD_CONTEXT_AMD64;
         break;
       case MD_CPU_ARCHITECTURE_X86_WIN64:
         *context_cpu_flags = 0;
         break;
       case MD_CPU_ARCHITECTURE_SPARC:
         *context_cpu_flags = MD_CONTEXT_SPARC;
         break;
       case MD_CPU_ARCHITECTURE_UNKNOWN:
         *context_cpu_flags = 0;
         break;
       default:
         *context_cpu_flags = 0;
         break;
     }
   }
   // Restore position and return
   return SeekSet(saved_position);
 }
 bool Minidump::Read() {
   // Invalidate cached data.
   delete directory_;
   directory_ = NULL;
   stream_map_->clear();
   valid_ = false;
   if (!Open()) {
     BPLOG(ERROR) << "Minidump cannot open minidump";
     return false;
   }
   if (!ReadBytes(&header_, sizeof(MDRawHeader))) {
     BPLOG(ERROR) << "Minidump cannot read header";
     return false;
   }
   if (header_.signature != MD_HEADER_SIGNATURE) {
     // The file may be byte-swapped.  Under the present architecture, these
     // classes don't know or need to know what CPU (or endianness) the
     // minidump was produced on in order to parse it.  Use the signature as
     // a byte order marker.
     uint32_t signature_swapped = header_.signature;
     Swap(&signature_swapped);
     if (signature_swapped != MD_HEADER_SIGNATURE) {
       // This isn't a minidump or a byte-swapped minidump.
       BPLOG(ERROR) << "Minidump header signature mismatch: (" <<
                       HexString(header_.signature) << ", " <<
                       HexString(signature_swapped) << ") != " <<
                       HexString(MD_HEADER_SIGNATURE);
       return false;
     }
     swap_ = true;
   } else {
     // The file is not byte-swapped.  Set swap_ false (it may have been true
     // if the object is being reused?)
     swap_ = false;
   }
   BPLOG(INFO) << "Minidump " << (swap_ ? "" : "not ") <<
                  "byte-swapping minidump";
   if (swap_) {
     Swap(&header_.signature);
     Swap(&header_.version);
     Swap(&header_.stream_count);
     Swap(&header_.stream_directory_rva);
     Swap(&header_.checksum);
     Swap(&header_.time_date_stamp);
     Swap(&header_.flags);
   }
   // Version check.  The high 16 bits of header_.version contain something
   // else "implementation specific."
   if ((header_.version & 0x0000ffff) != MD_HEADER_VERSION) {
     BPLOG(ERROR) << "Minidump version mismatch: " <<
                     HexString(header_.version & 0x0000ffff) << " != " <<
                     HexString(MD_HEADER_VERSION);
     return false;
   }
   if (!SeekSet(header_.stream_directory_rva)) {
     BPLOG(ERROR) << "Minidump cannot seek to stream directory";
     return false;
   }
   if (header_.stream_count > max_streams_) {
     BPLOG(ERROR) << "Minidump stream count " << header_.stream_count <<
                     " exceeds maximum " << max_streams_;
     return false;
   }
   if (header_.stream_count != 0) {
     scoped_ptr<MinidumpDirectoryEntries> directory(
         new MinidumpDirectoryEntries(header_.stream_count));
     // Read the entire array in one fell swoop, instead of reading one entry
     // at a time in the loop.
     if (!ReadBytes(&(*directory)[0],
                    sizeof(MDRawDirectory) * header_.stream_count)) {
       BPLOG(ERROR) << "Minidump cannot read stream directory";
       return false;
     }
     for (unsigned int stream_index = 0;
          stream_index < header_.stream_count;
          ++stream_index) {
       MDRawDirectory* directory_entry = &(*directory)[stream_index];
       if (swap_) {
         Swap(&directory_entry->stream_type);
         Swap(&directory_entry->location);
       }
       // Initialize the stream_map_ map, which speeds locating a stream by
       // type.
       unsigned int stream_type = directory_entry->stream_type;
       switch (stream_type) {
         case MD_THREAD_LIST_STREAM:
         case MD_MODULE_LIST_STREAM:
         case MD_MEMORY_LIST_STREAM:
         case MD_EXCEPTION_STREAM:
         case MD_SYSTEM_INFO_STREAM:
         case MD_MISC_INFO_STREAM:
         case MD_BREAKPAD_INFO_STREAM: {
           if (stream_map_->find(stream_type) != stream_map_->end()) {
             // Another stream with this type was already found.  A minidump
             // file should contain at most one of each of these stream types.
             BPLOG(ERROR) << "Minidump found multiple streams of type " <<
                             stream_type << ", but can only deal with one";
             return false;
           }
           // Fall through to default
         }
         default: {
           // Overwrites for stream types other than those above, but it's
           // expected to be the user's burden in that case.
           (*stream_map_)[stream_type].stream_index = stream_index;
         }
       }
     }
     directory_ = directory.release();
   }
   valid_ = true;
   return true;
 }
 MinidumpThreadList* Minidump::GetThreadList() {
   MinidumpThreadList* thread_list;
   return GetStream(&thread_list);
 }
 MinidumpModuleList* Minidump::GetModuleList() {
   MinidumpModuleList* module_list;
   return GetStream(&module_list);
 }
 MinidumpMemoryList* Minidump::GetMemoryList() {
   MinidumpMemoryList* memory_list;
   return GetStream(&memory_list);
 }
 MinidumpException* Minidump::GetException() {
   MinidumpException* exception;
   return GetStream(&exception);
 }
 MinidumpAssertion* Minidump::GetAssertion() {
   MinidumpAssertion* assertion;
   return GetStream(&assertion);
 }
 MinidumpSystemInfo* Minidump::GetSystemInfo() {
   MinidumpSystemInfo* system_info;
   return GetStream(&system_info);
 }
 MinidumpMiscInfo* Minidump::GetMiscInfo() {
   MinidumpMiscInfo* misc_info;
   return GetStream(&misc_info);
 }
 MinidumpBreakpadInfo* Minidump::GetBreakpadInfo() {
   MinidumpBreakpadInfo* breakpad_info;
   return GetStream(&breakpad_info);
 }
 MinidumpMemoryInfoList* Minidump::GetMemoryInfoList() {
   MinidumpMemoryInfoList* memory_info_list;
   return GetStream(&memory_info_list);
 }
 void Minidump::Print() {
   if (!valid_) {
     BPLOG(ERROR) << "Minidump cannot print invalid data";
     return;
   }
   printf("MDRawHeader\n");
   printf("  signature            = 0x%x\n",    header_.signature);
   printf("  version              = 0x%x\n",    header_.version);
   printf("  stream_count         = %d\n",      header_.stream_count);
   printf("  stream_directory_rva = 0x%x\n",    header_.stream_directory_rva);
   printf("  checksum             = 0x%x\n",    header_.checksum);
   struct tm timestruct;
 #ifdef _WIN32
   gmtime_s(&timestruct, reinterpret_cast<time_t*>(&header_.time_date_stamp));
 #else
   gmtime_r(reinterpret_cast<time_t*>(&header_.time_date_stamp), &timestruct);
 #endif
   char timestr[20];
   strftime(timestr, 20, "%Y-%m-%d %H:%M:%S", &timestruct);
   printf("  time_date_stamp      = 0x%x %s\n", header_.time_date_stamp,
                                                timestr);
   printf("  flags                = 0x%" PRIx64 "\n",  header_.flags);
   printf("\n");
   for (unsigned int stream_index = 0;
        stream_index < header_.stream_count;
        ++stream_index) {
     MDRawDirectory* directory_entry = &(*directory_)[stream_index];
     printf("mDirectory[%d]\n", stream_index);
     printf("MDRawDirectory\n");
     printf("  stream_type        = %d\n",   directory_entry->stream_type);
     printf("  location.data_size = %d\n",
            directory_entry->location.data_size);
     printf("  location.rva       = 0x%x\n", directory_entry->location.rva);
     printf("\n");
   }
   printf("Streams:\n");
   for (MinidumpStreamMap::const_iterator iterator = stream_map_->begin();
        iterator != stream_map_->end();
        ++iterator) {
     uint32_t stream_type = iterator->first;
     MinidumpStreamInfo info = iterator->second;
     printf("  stream type 0x%x at index %d\n", stream_type, info.stream_index);
   }
   printf("\n");
 }
 const MDRawDirectory* Minidump::GetDirectoryEntryAtIndex(unsigned int index)
       const {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid Minidump for GetDirectoryEntryAtIndex";
     return NULL;
   }
   if (index >= header_.stream_count) {
     BPLOG(ERROR) << "Minidump stream directory index out of range: " <<
                     index << "/" << header_.stream_count;
     return NULL;
   }
   return &(*directory_)[index];
 }
 bool Minidump::ReadBytes(void* bytes, size_t count) {
   // Can't check valid_ because Read needs to call this method before
   // validity can be determined.
   if (!stream_) {
     return false;
   }
   stream_->read(static_cast<char*>(bytes), count);
   size_t bytes_read = stream_->gcount();
   if (bytes_read != count) {
     if (bytes_read == size_t(-1)) {
       string error_string;
       int error_code = ErrnoString(&error_string);
       BPLOG(ERROR) << "ReadBytes: error " << error_code << ": " << error_string;
     } else {
       BPLOG(ERROR) << "ReadBytes: read " << bytes_read << "/" << count;
     }
     return false;
   }
   return true;
 }
 bool Minidump::SeekSet(off_t offset) {
   // Can't check valid_ because Read needs to call this method before
   // validity can be determined.
   if (!stream_) {
     return false;
   }
   stream_->seekg(offset, std::ios_base::beg);
   if (!stream_->good()) {
     string error_string;
     int error_code = ErrnoString(&error_string);
     BPLOG(ERROR) << "SeekSet: error " << error_code << ": " << error_string;
     return false;
   }
   return true;
 }
 off_t Minidump::Tell() {
   if (!valid_ || !stream_) {
     return (off_t)-1;
   }
   return stream_->tellg();
 }
 string* Minidump::ReadString(off_t offset) {
   if (!valid_) {
     BPLOG(ERROR) << "Invalid Minidump for ReadString";
     return NULL;
   }
   if (!SeekSet(offset)) {
     BPLOG(ERROR) << "ReadString could not seek to string at offset " << offset;
     return NULL;
   }
   uint32_t bytes;
   if (!ReadBytes(&bytes, sizeof(bytes))) {
     BPLOG(ERROR) << "ReadString could not read string size at offset " <<
                     offset;
     return NULL;
   }
   if (swap_)
     Swap(&bytes);
   if (bytes % 2 != 0) {
     BPLOG(ERROR) << "ReadString found odd-sized " << bytes <<
                     "-byte string at offset " << offset;
     return NULL;
   }
   unsigned int utf16_words = bytes / 2;
   if (utf16_words > max_string_length_) {
     BPLOG(ERROR) << "ReadString string length " << utf16_words <<
                     " exceeds maximum " << max_string_length_ <<
                     " at offset " << offset;
     return NULL;
   }
   vector<uint16_t> string_utf16(utf16_words);
   if (utf16_words) {
     if (!ReadBytes(&string_utf16[0], bytes)) {
       BPLOG(ERROR) << "ReadString could not read " << bytes <<
                       "-byte string at offset " << offset;
       return NULL;
     }
   }
   return UTF16ToUTF8(string_utf16, swap_);
 }
 bool Minidump::SeekToStreamType(uint32_t  stream_type,
                                 uint32_t* stream_length) {
   BPLOG_IF(ERROR, !stream_length) << "Minidump::SeekToStreamType requires "
                                      "|stream_length|";
   assert(stream_length);
   *stream_length = 0;
   if (!valid_) {
     BPLOG(ERROR) << "Invalid Mindump for SeekToStreamType";
     return false;
   }
   MinidumpStreamMap::const_iterator iterator = stream_map_->find(stream_type);
   if (iterator == stream_map_->end()) {
     // This stream type didn't exist in the directory.
     BPLOG(INFO) << "SeekToStreamType: type " << stream_type << " not present";
     return false;
   }
   MinidumpStreamInfo info = iterator->second;
   if (info.stream_index >= header_.stream_count) {
     BPLOG(ERROR) << "SeekToStreamType: type " << stream_type <<
                     " out of range: " <<
                     info.stream_index << "/" << header_.stream_count;
     return false;
   }
   MDRawDirectory* directory_entry = &(*directory_)[info.stream_index];
   if (!SeekSet(directory_entry->location.rva)) {
     BPLOG(ERROR) << "SeekToStreamType could not seek to stream type " <<
                     stream_type;
     return false;
   }
   *stream_length = directory_entry->location.data_size;
   return true;
 }
 template<typename T>
 T* Minidump::GetStream(T** stream) {
   // stream is a garbage parameter that's present only to account for C++'s
   // inability to overload a method based solely on its return type.
   const uint32_t stream_type = T::kStreamType;
   BPLOG_IF(ERROR, !stream) << "Minidump::GetStream type " << stream_type <<
                               " requires |stream|";
   assert(stream);
   *stream = NULL;
   if (!valid_) {
     BPLOG(ERROR) << "Invalid Minidump for GetStream type " << stream_type;
     return NULL;
   }
   MinidumpStreamMap::iterator iterator = stream_map_->find(stream_type);
   if (iterator == stream_map_->end()) {
     // This stream type didn't exist in the directory.
     BPLOG(INFO) << "GetStream: type " << stream_type << " not present";
     return NULL;
   }
   // Get a pointer so that the stored stream field can be altered.
   MinidumpStreamInfo* info = &iterator->second;
   if (info->stream) {
     // This cast is safe because info.stream is only populated by this
     // method, and there is a direct correlation between T and stream_type.
     *stream = static_cast<T*>(info->stream);
     return *stream;
   }
   uint32_t stream_length;
   if (!SeekToStreamType(stream_type, &stream_length)) {
     BPLOG(ERROR) << "GetStream could not seek to stream type " << stream_type;
     return NULL;
   }
   scoped_ptr<T> new_stream(new T(this));
   if (!new_stream->Read(stream_length)) {
     BPLOG(ERROR) << "GetStream could not read stream type " << stream_type;
     return NULL;
   }
   *stream = new_stream.release();
   info->stream = *stream;
   return *stream;
 }
 }  // namespace google_breakpad

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toolkit/crashreporter/google-breakpad/src/processor/minidump.cc@6474c204b198 (annotated)

toolkit/crashreporter/google-breakpad/src/processor/minidump.cc