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