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comparison: toolkit/crashreporter/google-breakpad/src/processor/stackwalker_arm.h
toolkit/crashreporter/google-breakpad/src/processor/stackwalker_arm.h
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| 1 // -*- mode: C++ -*- | |
| 2 | |
| 3 // Copyright (c) 2010 Google Inc. | |
| 4 // All rights reserved. | |
| 5 // | |
| 6 // Redistribution and use in source and binary forms, with or without | |
| 7 // modification, are permitted provided that the following conditions are | |
| 8 // met: | |
| 9 // | |
| 10 // * Redistributions of source code must retain the above copyright | |
| 11 // notice, this list of conditions and the following disclaimer. | |
| 12 // * Redistributions in binary form must reproduce the above | |
| 13 // copyright notice, this list of conditions and the following disclaimer | |
| 14 // in the documentation and/or other materials provided with the | |
| 15 // distribution. | |
| 16 // * Neither the name of Google Inc. nor the names of its | |
| 17 // contributors may be used to endorse or promote products derived from | |
| 18 // this software without specific prior written permission. | |
| 19 // | |
| 20 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 21 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 22 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 23 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 24 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 25 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 26 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 27 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 28 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 29 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 30 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 31 | |
| 32 // stackwalker_arm.h: arm-specific stackwalker. | |
| 33 // | |
| 34 // Provides stack frames given arm register context and a memory region | |
| 35 // corresponding to an arm stack. | |
| 36 // | |
| 37 // Author: Mark Mentovai, Ted Mielczarek | |
| 38 | |
| 39 | |
| 40 #ifndef PROCESSOR_STACKWALKER_ARM_H__ | |
| 41 #define PROCESSOR_STACKWALKER_ARM_H__ | |
| 42 | |
| 43 #include "google_breakpad/common/breakpad_types.h" | |
| 44 #include "google_breakpad/common/minidump_format.h" | |
| 45 #include "google_breakpad/processor/stackwalker.h" | |
| 46 | |
| 47 namespace google_breakpad { | |
| 48 | |
| 49 class CodeModules; | |
| 50 | |
| 51 class StackwalkerARM : public Stackwalker { | |
| 52 public: | |
| 53 // context is an arm context object that gives access to arm-specific | |
| 54 // register state corresponding to the innermost called frame to be | |
| 55 // included in the stack. The other arguments are passed directly through | |
| 56 // to the base Stackwalker constructor. | |
| 57 StackwalkerARM(const SystemInfo* system_info, | |
| 58 const MDRawContextARM* context, | |
| 59 int fp_register, | |
| 60 MemoryRegion* memory, | |
| 61 const CodeModules* modules, | |
| 62 StackFrameSymbolizer* frame_symbolizer); | |
| 63 | |
| 64 // Change the context validity mask of the frame returned by | |
| 65 // GetContextFrame to VALID. This is only for use by unit tests; the | |
| 66 // default behavior is correct for all application code. | |
| 67 void SetContextFrameValidity(int valid) { context_frame_validity_ = valid; } | |
| 68 | |
| 69 private: | |
| 70 // Implementation of Stackwalker, using arm context and stack conventions. | |
| 71 virtual StackFrame* GetContextFrame(); | |
| 72 virtual StackFrame* GetCallerFrame(const CallStack* stack, | |
| 73 bool stack_scan_allowed); | |
| 74 | |
| 75 // Use cfi_frame_info (derived from STACK CFI records) to construct | |
| 76 // the frame that called frames.back(). The caller takes ownership | |
| 77 // of the returned frame. Return NULL on failure. | |
| 78 StackFrameARM* GetCallerByCFIFrameInfo(const vector<StackFrame*> &frames, | |
| 79 CFIFrameInfo* cfi_frame_info); | |
| 80 | |
| 81 // Use the frame pointer. The caller takes ownership of the returned frame. | |
| 82 // Return NULL on failure. | |
| 83 StackFrameARM* GetCallerByFramePointer(const vector<StackFrame*> &frames); | |
| 84 | |
| 85 // Scan the stack for plausible return addresses. The caller takes ownership | |
| 86 // of the returned frame. Return NULL on failure. | |
| 87 StackFrameARM* GetCallerByStackScan(const vector<StackFrame*> &frames); | |
| 88 | |
| 89 // Stores the CPU context corresponding to the youngest stack frame, to | |
| 90 // be returned by GetContextFrame. | |
| 91 const MDRawContextARM* context_; | |
| 92 | |
| 93 // The register to use a as frame pointer. The value is -1 if frame pointer | |
| 94 // cannot be used. | |
| 95 int fp_register_; | |
| 96 | |
| 97 // Validity mask for youngest stack frame. This is always | |
| 98 // CONTEXT_VALID_ALL in real use; it is only changeable for the sake of | |
| 99 // unit tests. | |
| 100 int context_frame_validity_; | |
| 101 }; | |
| 102 | |
| 103 | |
| 104 } // namespace google_breakpad | |
| 105 | |
| 106 | |
| 107 #endif // PROCESSOR_STACKWALKER_ARM_H__ |
