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 #if SANITIZER_LINUX && (defined(__arm__) || \ 23 defined(__powerpc__) || defined(__powerpc64__) || \ 24 defined(__sparc__) || \ 25 defined(__mips__)) 26 #define SANITIZER_CAN_FAST_UNWIND 0 27 #else 28 #define SANITIZER_CAN_FAST_UNWIND 1 29 #endif 30 31 struct StackTrace { 32 typedef bool (*SymbolizeCallback)(const void *pc, char *out_buffer, 33 int out_size); 34 uptr size; 35 uptr max_size; 36 uptr trace[kStackTraceMax]; 37 static void PrintStack(const uptr *addr, uptr size, 38 bool symbolize, const char *strip_file_prefix, 39 SymbolizeCallback symbolize_callback); 40 void CopyTo(uptr *dst, uptr dst_size) { 41 for (uptr i = 0; i < size && i < dst_size; i++) 42 dst[i] = trace[i]; 43 for (uptr i = size; i < dst_size; i++) 44 dst[i] = 0; 45 } 46 47 void CopyFrom(uptr *src, uptr src_size) { 48 size = src_size; 49 if (size > kStackTraceMax) size = kStackTraceMax; 50 for (uptr i = 0; i < size; i++) { 51 trace[i] = src[i]; 52 } 53 } 54 55 void FastUnwindStack(uptr pc, uptr bp, uptr stack_top, uptr stack_bottom); 56 void SlowUnwindStack(uptr pc, uptr max_depth); 57 58 void PopStackFrames(uptr count); 59 60 static uptr GetCurrentPc(); 61 static uptr GetPreviousInstructionPc(uptr pc); 62 63 static uptr CompressStack(StackTrace *stack, 64 u32 *compressed, uptr size); 65 static void UncompressStack(StackTrace *stack, 66 u32 *compressed, uptr size); 67 }; 68 69 70 const char *StripPathPrefix(const char *filepath, 71 const char *strip_file_prefix); 72 73 void GetStackTrace(StackTrace *stack, uptr max_s, uptr pc, uptr bp, 74 uptr stack_top, uptr stack_bottom, bool fast); 75 76 } // namespace __sanitizer 77 78 // Use this macro if you want to print stack trace with the caller 79 // of the current function in the top frame. 80 #define GET_CALLER_PC_BP_SP \ 81 uptr bp = GET_CURRENT_FRAME(); \ 82 uptr pc = GET_CALLER_PC(); \ 83 uptr local_stack; \ 84 uptr sp = (uptr)&local_stack 85 86 // Use this macro if you want to print stack trace with the current 87 // function in the top frame. 88 #define GET_CURRENT_PC_BP_SP \ 89 uptr bp = GET_CURRENT_FRAME(); \ 90 uptr pc = StackTrace::GetCurrentPc(); \ 91 uptr local_stack; \ 92 uptr sp = (uptr)&local_stack 93 94 95 #endif // SANITIZER_STACKTRACE_H 96
