toolkit/crashreporter/google-breakpad/src/processor/cfi_frame_info-inl.h@129ffea94266 (annotated)
toolkit/crashreporter/google-breakpad/src/processor/cfi_frame_info-inl.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
| michael@0 | 1 | // -*- mode: C++ -*- |
| michael@0 | 2 | |
| michael@0 | 3 | // Copyright (c) 2010, Google Inc. |
| michael@0 | 4 | // All rights reserved. |
| michael@0 | 5 | // |
| michael@0 | 6 | // Redistribution and use in source and binary forms, with or without |
| michael@0 | 7 | // modification, are permitted provided that the following conditions are |
| michael@0 | 8 | // met: |
| michael@0 | 9 | // |
| michael@0 | 10 | // * Redistributions of source code must retain the above copyright |
| michael@0 | 11 | // notice, this list of conditions and the following disclaimer. |
| michael@0 | 12 | // * Redistributions in binary form must reproduce the above |
| michael@0 | 13 | // copyright notice, this list of conditions and the following disclaimer |
| michael@0 | 14 | // in the documentation and/or other materials provided with the |
| michael@0 | 15 | // distribution. |
| michael@0 | 16 | // * Neither the name of Google Inc. nor the names of its |
| michael@0 | 17 | // contributors may be used to endorse or promote products derived from |
| michael@0 | 18 | // this software without specific prior written permission. |
| michael@0 | 19 | // |
| michael@0 | 20 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| michael@0 | 21 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| michael@0 | 22 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| michael@0 | 23 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| michael@0 | 24 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| michael@0 | 25 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| michael@0 | 26 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| michael@0 | 27 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| michael@0 | 28 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| michael@0 | 29 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| michael@0 | 30 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 31 | |
| michael@0 | 32 | // Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> |
| michael@0 | 33 | |
| michael@0 | 34 | // cfi_frame_info-inl.h: Definitions for cfi_frame_info.h inlined functions. |
| michael@0 | 35 | |
| michael@0 | 36 | #ifndef PROCESSOR_CFI_FRAME_INFO_INL_H_ |
| michael@0 | 37 | #define PROCESSOR_CFI_FRAME_INFO_INL_H_ |
| michael@0 | 38 | |
| michael@0 | 39 | #include <string.h> |
| michael@0 | 40 | |
| michael@0 | 41 | namespace google_breakpad { |
| michael@0 | 42 | |
| michael@0 | 43 | template <typename RegisterValueType, class RawContextType> |
| michael@0 | 44 | bool SimpleCFIWalker<RegisterValueType, RawContextType>::FindCallerRegisters( |
| michael@0 | 45 | const MemoryRegion &memory, |
| michael@0 | 46 | const CFIFrameInfo &cfi_frame_info, |
| michael@0 | 47 | const RawContextType &callee_context, |
| michael@0 | 48 | int callee_validity, |
| michael@0 | 49 | RawContextType *caller_context, |
| michael@0 | 50 | int *caller_validity) const { |
| michael@0 | 51 | typedef CFIFrameInfo::RegisterValueMap<RegisterValueType> ValueMap; |
| michael@0 | 52 | ValueMap callee_registers; |
| michael@0 | 53 | ValueMap caller_registers; |
| michael@0 | 54 | |
| michael@0 | 55 | // Populate callee_registers with register values from callee_context. |
| michael@0 | 56 | for (size_t i = 0; i < map_size_; i++) { |
| michael@0 | 57 | const RegisterSet &r = register_map_[i]; |
| michael@0 | 58 | if (callee_validity & r.validity_flag) |
| michael@0 | 59 | callee_registers.set(r.name, callee_context.*r.context_member); |
| michael@0 | 60 | } |
| michael@0 | 61 | |
| michael@0 | 62 | // Apply the rules, and see what register values they yield. |
| michael@0 | 63 | if (!cfi_frame_info |
| michael@0 | 64 | .FindCallerRegs<RegisterValueType>(callee_registers, memory, |
| michael@0 | 65 | &caller_registers)) |
| michael@0 | 66 | return false; |
| michael@0 | 67 | |
| michael@0 | 68 | // Populate *caller_context with the values the rules placed in |
| michael@0 | 69 | // caller_registers. |
| michael@0 | 70 | memset(caller_context, 0xda, sizeof(*caller_context)); |
| michael@0 | 71 | *caller_validity = 0; |
| michael@0 | 72 | for (size_t i = 0; i < map_size_; i++) { |
| michael@0 | 73 | const RegisterSet &r = register_map_[i]; |
| michael@0 | 74 | |
| michael@0 | 75 | // Did the rules provide a value for this register by its name? |
| michael@0 | 76 | bool found = false; |
| michael@0 | 77 | RegisterValueType v = caller_registers.get(&found, r.name); |
| michael@0 | 78 | if (found) { |
| michael@0 | 79 | caller_context->*r.context_member = v; |
| michael@0 | 80 | *caller_validity |= r.validity_flag; |
| michael@0 | 81 | continue; |
| michael@0 | 82 | } |
| michael@0 | 83 | |
| michael@0 | 84 | // Did the rules provide a value for this register under its |
| michael@0 | 85 | // alternate name? |
| michael@0 | 86 | if (r.alternate_name) { |
| michael@0 | 87 | found = false; |
| michael@0 | 88 | v = caller_registers.get(&found, r.alternate_name); |
| michael@0 | 89 | if (found) { |
| michael@0 | 90 | caller_context->*r.context_member = v; |
| michael@0 | 91 | *caller_validity |= r.validity_flag; |
| michael@0 | 92 | continue; |
| michael@0 | 93 | } |
| michael@0 | 94 | } |
| michael@0 | 95 | |
| michael@0 | 96 | // Is this a callee-saves register? The walker assumes that these |
| michael@0 | 97 | // still hold the caller's value if the CFI doesn't mention them. |
| michael@0 | 98 | // |
| michael@0 | 99 | // Note that other frame walkers may fail to recover callee-saves |
| michael@0 | 100 | // registers; for example, the x86 "traditional" strategy only |
| michael@0 | 101 | // recovers %eip, %esp, and %ebp, even though %ebx, %esi, and %edi |
| michael@0 | 102 | // are callee-saves, too. It is not correct to blindly set the |
| michael@0 | 103 | // valid bit for all callee-saves registers, without first |
| michael@0 | 104 | // checking its validity bit in the callee. |
| michael@0 | 105 | if (r.callee_saves && (callee_validity & r.validity_flag) != 0) { |
| michael@0 | 106 | caller_context->*r.context_member = callee_context.*r.context_member; |
| michael@0 | 107 | *caller_validity |= r.validity_flag; |
| michael@0 | 108 | continue; |
| michael@0 | 109 | } |
| michael@0 | 110 | |
| michael@0 | 111 | // Otherwise, the register's value is unknown. |
| michael@0 | 112 | } |
| michael@0 | 113 | |
| michael@0 | 114 | return true; |
| michael@0 | 115 | } |
| michael@0 | 116 | |
| michael@0 | 117 | } // namespace google_breakpad |
| michael@0 | 118 | |
| michael@0 | 119 | #endif // PROCESSOR_CFI_FRAME_INFO_INL_H_ |
