The Tor Browser: comparison toolkit/crashreporter/google-breakpad/src/client/minidump_file

--1:000000000000
+:50bc76f3ae6b
+// Copyright (c) 2006, 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_file_writer.cc: Minidump file writer implementation.
+//
+// See minidump_file_writer.h for documentation.
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include "client/minidump_file_writer-inl.h"
+#include "common/linux/linux_libc_support.h"
+#include "common/string_conversion.h"
+#if __linux__
+#include "third_party/lss/linux_syscall_support.h"
+#endif
+namespace google_breakpad {
+const MDRVA MinidumpFileWriter::kInvalidMDRVA = static_cast<MDRVA>(-1);
+MinidumpFileWriter::MinidumpFileWriter()
+: file_(-1),
+close_file_when_destroyed_(true),
+position_(0),
+size_(0) {
+}
+MinidumpFileWriter::~MinidumpFileWriter() {
+if (close_file_when_destroyed_)
+Close();
+}
+bool MinidumpFileWriter::Open(const char *path) {
+assert(file_ == -1);
+#if __linux__
+file_ = sys_open(path, O_WRONLY | O_CREAT | O_EXCL, 0600);
+#else
+file_ = open(path, O_WRONLY | O_CREAT | O_EXCL, 0600);
+#endif
+return file_ != -1;
+}
+void MinidumpFileWriter::SetFile(const int file) {
+assert(file_ == -1);
+file_ = file;
+close_file_when_destroyed_ = false;
+}
+bool MinidumpFileWriter::Close() {
+bool result = true;
+if (file_ != -1) {
+if (-1 == ftruncate(file_, position_)) {
+return false;
+}
+#if __linux__
+result = (sys_close(file_) == 0);
+#else
+result = (close(file_) == 0);
+#endif
+file_ = -1;
+}
+return result;
+}
+bool MinidumpFileWriter::CopyStringToMDString(const wchar_t *str,
+unsigned int length,
+TypedMDRVA<MDString> *mdstring) {
+bool result = true;
+if (sizeof(wchar_t) == sizeof(uint16_t)) {
+// Shortcut if wchar_t is the same size as MDString's buffer
+result = mdstring->Copy(str, mdstring->get()->length);
+} else {
+uint16_t out[2];
+int out_idx = 0;
+// Copy the string character by character
+while (length && result) {
+UTF32ToUTF16Char(*str, out);
+if (!out[0])
+return false;
+// Process one character at a time
+--length;
+++str;
+// Append the one or two UTF-16 characters.  The first one will be non-
+// zero, but the second one may be zero, depending on the conversion from
+// UTF-32.
+int out_count = out[1] ? 2 : 1;
+size_t out_size = sizeof(uint16_t) * out_count;
+result = mdstring->CopyIndexAfterObject(out_idx, out, out_size);
+out_idx += out_count;
+}
+}
+return result;
+}
+bool MinidumpFileWriter::CopyStringToMDString(const char *str,
+unsigned int length,
+TypedMDRVA<MDString> *mdstring) {
+bool result = true;
+uint16_t out[2];
+int out_idx = 0;
+// Copy the string character by character
+while (length && result) {
+int conversion_count = UTF8ToUTF16Char(str, length, out);
+if (!conversion_count)
+return false;
+// Move the pointer along based on the nubmer of converted characters
+length -= conversion_count;
+str += conversion_count;
+// Append the one or two UTF-16 characters
+int out_count = out[1] ? 2 : 1;
+size_t out_size = sizeof(uint16_t) * out_count;
+result = mdstring->CopyIndexAfterObject(out_idx, out, out_size);
+out_idx += out_count;
+}
+return result;
+}
+template <typename CharType>
+bool MinidumpFileWriter::WriteStringCore(const CharType *str,
+unsigned int length,
+MDLocationDescriptor *location) {
+assert(str);
+assert(location);
+// Calculate the mdstring length by either limiting to |length| as passed in
+// or by finding the location of the NULL character.
+unsigned int mdstring_length = 0;
+if (!length)
+length = INT_MAX;
+for (; mdstring_length < length && str[mdstring_length]; ++mdstring_length)
+;
+// Allocate the string buffer
+TypedMDRVA<MDString> mdstring(this);
+if (!mdstring.AllocateObjectAndArray(mdstring_length + 1, sizeof(uint16_t)))
+return false;
+// Set length excluding the NULL and copy the string
+mdstring.get()->length =
+static_cast<uint32_t>(mdstring_length * sizeof(uint16_t));
+bool result = CopyStringToMDString(str, mdstring_length, &mdstring);
+// NULL terminate
+if (result) {
+uint16_t ch = 0;
+result = mdstring.CopyIndexAfterObject(mdstring_length, &ch, sizeof(ch));
+if (result)
+*location = mdstring.location();
+}
+return result;
+}
+bool MinidumpFileWriter::WriteString(const wchar_t *str, unsigned int length,
+MDLocationDescriptor *location) {
+return WriteStringCore(str, length, location);
+}
+bool MinidumpFileWriter::WriteString(const char *str, unsigned int length,
+MDLocationDescriptor *location) {
+return WriteStringCore(str, length, location);
+}
+bool MinidumpFileWriter::WriteMemory(const void *src, size_t size,
+MDMemoryDescriptor *output) {
+assert(src);
+assert(output);
+UntypedMDRVA mem(this);
+if (!mem.Allocate(size))
+return false;
+if (!mem.Copy(src, mem.size()))
+return false;
+output->start_of_memory_range = reinterpret_cast<uint64_t>(src);
+output->memory = mem.location();
+return true;
+}
+MDRVA MinidumpFileWriter::Allocate(size_t size) {
+assert(size);
+assert(file_ != -1);
+size_t aligned_size = (size + 7) & ~7;  // 64-bit alignment
+if (position_ + aligned_size > size_) {
+size_t growth = aligned_size;
+size_t minimal_growth = getpagesize();
+// Ensure that the file grows by at least the size of a memory page
+if (growth < minimal_growth)
+growth = minimal_growth;
+size_t new_size = size_ + growth;
+if (ftruncate(file_, new_size) != 0)
+return kInvalidMDRVA;
+size_ = new_size;
+}
+MDRVA current_position = position_;
+position_ += static_cast<MDRVA>(aligned_size);
+return current_position;
+}
+bool MinidumpFileWriter::Copy(MDRVA position, const void *src, ssize_t size) {
+assert(src);
+assert(size);
+assert(file_ != -1);
+// Ensure that the data will fit in the allocated space
+if (static_cast<size_t>(size + position) > size_)
+return false;
+// Seek and write the data
+#if __linux__
+if (sys_lseek(file_, position, SEEK_SET) == static_cast<off_t>(position)) {
+if (sys_write(file_, src, size) == size) {
+#else
+if (lseek(file_, position, SEEK_SET) == static_cast<off_t>(position)) {
+if (write(file_, src, size) == size) {
+#endif
+return true;
+}
+}
+return false;
+}
+bool UntypedMDRVA::Allocate(size_t size) {
+assert(size_ == 0);
+size_ = size;
+position_ = writer_->Allocate(size_);
+return position_ != MinidumpFileWriter::kInvalidMDRVA;
+}
+bool UntypedMDRVA::Copy(MDRVA pos, const void *src, size_t size) {
+assert(src);
+assert(size);
+assert(pos + size <= position_ + size_);
+return writer_->Copy(pos, src, size);
+}
+}  // namespace google_breakpad

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comparison: toolkit/crashreporter/google-breakpad/src/client/minidump_file_writer.cc

toolkit/crashreporter/google-breakpad/src/client/minidump_file_writer.cc