1 //===-- sanitizer_stacktrace.h ----------------------------------*- C++ -*-===// 2 // 3 // This file is distributed under the University of Illinois Open Source 4 // License. See LICENSE.TXT for details. 5 // 6 //===----------------------------------------------------------------------===// 7 // 8 // This file is shared between AddressSanitizer and ThreadSanitizer 9 // run-time libraries. 10 //===----------------------------------------------------------------------===// 11 #ifndef SANITIZER_STACKTRACE_H 12 #define SANITIZER_STACKTRACE_H 13 14 #include "sanitizer_internal_defs.h" 15 16 namespace __sanitizer { 17 18 static const uptr kStackTraceMax = 256; 19 20 struct StackTrace { 21 typedef bool (*SymbolizeCallback)(const void *pc, char *out_buffer, 22 int out_size); 23 uptr size; 24 uptr max_size; 25 uptr trace[kStackTraceMax]; 26 static void PrintStack(const uptr *addr, uptr size, 27 bool symbolize, const char *strip_file_prefix, 28 SymbolizeCallback symbolize_callback); 29 void CopyTo(uptr *dst, uptr dst_size) { 30 for (uptr i = 0; i < size && i < dst_size; i++) 31 dst[i] = trace[i]; 32 for (uptr i = size; i < dst_size; i++) 33 dst[i] = 0; 34 } 35 36 void CopyFrom(uptr *src, uptr src_size) { 37 size = src_size; 38 if (size > kStackTraceMax) size = kStackTraceMax; 39 for (uptr i = 0; i < size; i++) { 40 trace[i] = src[i]; 41 } 42 } 43 44 void FastUnwindStack(uptr pc, uptr bp, uptr stack_top, uptr stack_bottom); 45 void SlowUnwindStack(uptr pc, uptr max_depth); 46 47 void PopStackFrames(uptr count); 48 49 static uptr GetCurrentPc(); 50 static uptr GetPreviousInstructionPc(uptr pc); 51 52 static uptr CompressStack(StackTrace *stack, 53 u32 *compressed, uptr size); 54 static void UncompressStack(StackTrace *stack, 55 u32 *compressed, uptr size); 56 }; 57 58 59 const char *StripPathPrefix(const char *filepath, 60 const char *strip_file_prefix); 61 62 } // namespace __sanitizer 63 64 // Use this macro if you want to print stack trace with the caller 65 // of the current function in the top frame. 66 #define GET_CALLER_PC_BP_SP \ 67 uptr bp = GET_CURRENT_FRAME(); \ 68 uptr pc = GET_CALLER_PC(); \ 69 uptr local_stack; \ 70 uptr sp = (uptr)&local_stack 71 72 // Use this macro if you want to print stack trace with the current 73 // function in the top frame. 74 #define GET_CURRENT_PC_BP_SP \ 75 uptr bp = GET_CURRENT_FRAME(); \ 76 uptr pc = StackTrace::GetCurrentPc(); \ 77 uptr local_stack; \ 78 uptr sp = (uptr)&local_stack 79 80 81 #endif // SANITIZER_STACKTRACE_H 82