1 //===-- sanitizer_stacktrace.h ----------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file is shared between AddressSanitizer and ThreadSanitizer 11 // run-time libraries. 12 //===----------------------------------------------------------------------===// 13 #ifndef SANITIZER_STACKTRACE_H 14 #define SANITIZER_STACKTRACE_H 15 16 #include "sanitizer_internal_defs.h" 17 18 namespace __sanitizer { 19 20 static const uptr kStackTraceMax = 256; 21 22 struct StackTrace { 23 typedef bool (*SymbolizeCallback)(const void *pc, char *out_buffer, 24 int out_size); 25 uptr size; 26 uptr max_size; 27 uptr trace[kStackTraceMax]; 28 static void PrintStack(const uptr *addr, uptr size, 29 bool symbolize, const char *strip_file_prefix, 30 SymbolizeCallback symbolize_callback); CopyToStackTrace31 void CopyTo(uptr *dst, uptr dst_size) { 32 for (uptr i = 0; i < size && i < dst_size; i++) 33 dst[i] = trace[i]; 34 for (uptr i = size; i < dst_size; i++) 35 dst[i] = 0; 36 } 37 CopyFromStackTrace38 void CopyFrom(uptr *src, uptr src_size) { 39 size = src_size; 40 if (size > kStackTraceMax) size = kStackTraceMax; 41 for (uptr i = 0; i < size; i++) { 42 trace[i] = src[i]; 43 } 44 } 45 46 void FastUnwindStack(uptr pc, uptr bp, uptr stack_top, uptr stack_bottom); 47 void SlowUnwindStack(uptr pc, uptr max_depth); 48 49 void PopStackFrames(uptr count); 50 51 static uptr GetCurrentPc(); 52 static uptr GetPreviousInstructionPc(uptr pc); 53 54 static uptr CompressStack(StackTrace *stack, 55 u32 *compressed, uptr size); 56 static void UncompressStack(StackTrace *stack, 57 u32 *compressed, uptr size); 58 }; 59 60 61 const char *StripPathPrefix(const char *filepath, 62 const char *strip_file_prefix); 63 64 } // namespace __sanitizer 65 66 // Use this macro if you want to print stack trace with the caller 67 // of the current function in the top frame. 68 #define GET_CALLER_PC_BP_SP \ 69 uptr bp = GET_CURRENT_FRAME(); \ 70 uptr pc = GET_CALLER_PC(); \ 71 uptr local_stack; \ 72 uptr sp = (uptr)&local_stack 73 74 // Use this macro if you want to print stack trace with the current 75 // function in the top frame. 76 #define GET_CURRENT_PC_BP_SP \ 77 uptr bp = GET_CURRENT_FRAME(); \ 78 uptr pc = StackTrace::GetCurrentPc(); \ 79 uptr local_stack; \ 80 uptr sp = (uptr)&local_stack 81 82 83 #endif // SANITIZER_STACKTRACE_H 84