1 // Copyright (c) 2013 Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 // stackwalker_mips.h: MIPS-specific stackwalker. 31 // 32 // Provides stack frames given MIPS register context and a memory region 33 // corresponding to a MIPSstack. 34 // 35 // Author: Tata Elxsi 36 37 #ifndef PROCESSOR_STACKWALKER_MIPS_H__ 38 #define PROCESSOR_STACKWALKER_MIPS_H__ 39 40 #include "google_breakpad/common/breakpad_types.h" 41 #include "google_breakpad/common/minidump_format.h" 42 #include "google_breakpad/processor/stackwalker.h" 43 #include "google_breakpad/processor/stack_frame_cpu.h" 44 #include "processor/cfi_frame_info.h" 45 46 namespace google_breakpad { 47 48 class CodeModules; 49 50 class StackwalkerMIPS : public Stackwalker { 51 public: 52 // Context is a MIPS context object that gives access to mips-specific 53 // register state corresponding to the innermost called frame to be 54 // included in the stack. The other arguments are passed directly 55 // through to the base Stackwalker constructor. 56 StackwalkerMIPS(const SystemInfo* system_info, 57 const MDRawContextMIPS* context, 58 MemoryRegion* memory, 59 const CodeModules* modules, 60 StackFrameSymbolizer* frame_symbolizer); 61 62 private: 63 // Implementation of Stackwalker, using mips context and stack conventions. 64 virtual StackFrame* GetContextFrame(); 65 virtual StackFrame* GetCallerFrame(const CallStack* stack, 66 bool stack_scan_allowed); 67 68 // Use cfi_frame_info (derived from STACK CFI records) to construct 69 // the frame that called frames.back(). The caller takes ownership 70 // of the returned frame. Return NULL on failure. 71 StackFrameMIPS* GetCallerByCFIFrameInfo(const vector<StackFrame*>& frames, 72 CFIFrameInfo* cfi_frame_info); 73 74 // Scan the stack for plausible return address and frame pointer pair. 75 // The caller takes ownership of the returned frame. Return NULL on failure. 76 StackFrameMIPS* GetCallerByStackScan(const vector<StackFrame*>& frames); 77 78 // Stores the CPU context corresponding to the innermost stack frame to 79 // be returned by GetContextFrame. 80 const MDRawContextMIPS* context_; 81 }; 82 83 } // namespace google_breakpad 84 85 #endif // PROCESSOR_STACKWALKER_MIPS_H__ 86