diff options
Diffstat (limited to 'lib/sanitizer_common/sanitizer_stacktrace.h')
| -rw-r--r-- | lib/sanitizer_common/sanitizer_stacktrace.h | 65 |
1 files changed, 46 insertions, 19 deletions
diff --git a/lib/sanitizer_common/sanitizer_stacktrace.h b/lib/sanitizer_common/sanitizer_stacktrace.h index 450a40a9069f..f1f29e9f32ee 100644 --- a/lib/sanitizer_common/sanitizer_stacktrace.h +++ b/lib/sanitizer_common/sanitizer_stacktrace.h @@ -1,9 +1,8 @@ //===-- sanitizer_stacktrace.h ----------------------------------*- C++ -*-===// // -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // @@ -17,9 +16,11 @@ namespace __sanitizer { +struct BufferedStackTrace; + static const u32 kStackTraceMax = 256; -#if defined(__sparc__) || (SANITIZER_LINUX && defined(__mips__)) +#if SANITIZER_LINUX && defined(__mips__) # define SANITIZER_CAN_FAST_UNWIND 0 #elif SANITIZER_WINDOWS # define SANITIZER_CAN_FAST_UNWIND 0 @@ -59,7 +60,7 @@ struct StackTrace { static bool WillUseFastUnwind(bool request_fast_unwind) { if (!SANITIZER_CAN_FAST_UNWIND) return false; - else if (!SANITIZER_CAN_SLOW_UNWIND) + if (!SANITIZER_CAN_SLOW_UNWIND) return true; return request_fast_unwind; } @@ -97,6 +98,23 @@ struct BufferedStackTrace : public StackTrace { BufferedStackTrace() : StackTrace(trace_buffer, 0), top_frame_bp(0) {} void Init(const uptr *pcs, uptr cnt, uptr extra_top_pc = 0); + + // Get the stack trace with the given pc and bp. + // The pc will be in the position 0 of the resulting stack trace. + // The bp may refer to the current frame or to the caller's frame. + void Unwind(uptr pc, uptr bp, void *context, bool request_fast, + u32 max_depth = kStackTraceMax) { + top_frame_bp = (max_depth > 0) ? bp : 0; + // Small max_depth optimization + if (max_depth <= 1) { + if (max_depth == 1) + trace_buffer[0] = pc; + size = max_depth; + return; + } + UnwindImpl(pc, bp, context, request_fast, max_depth); + } + void Unwind(u32 max_depth, uptr pc, uptr bp, void *context, uptr stack_top, uptr stack_bottom, bool request_fast_unwind); @@ -106,16 +124,23 @@ struct BufferedStackTrace : public StackTrace { } private: - void FastUnwindStack(uptr pc, uptr bp, uptr stack_top, uptr stack_bottom, - u32 max_depth); - void SlowUnwindStack(uptr pc, u32 max_depth); - void SlowUnwindStackWithContext(uptr pc, void *context, - u32 max_depth); + // Every runtime defines its own implementation of this method + void UnwindImpl(uptr pc, uptr bp, void *context, bool request_fast, + u32 max_depth); + + // UnwindFast/Slow have platform-specific implementations + void UnwindFast(uptr pc, uptr bp, uptr stack_top, uptr stack_bottom, + u32 max_depth); + void UnwindSlow(uptr pc, u32 max_depth); + void UnwindSlow(uptr pc, void *context, u32 max_depth); + void PopStackFrames(uptr count); uptr LocatePcInTrace(uptr pc); BufferedStackTrace(const BufferedStackTrace &) = delete; void operator=(const BufferedStackTrace &) = delete; + + friend class FastUnwindTest; }; // Check if given pointer points into allocated stack area. @@ -127,21 +152,23 @@ static inline bool IsValidFrame(uptr frame, uptr stack_top, uptr stack_bottom) { // Use this macro if you want to print stack trace with the caller // of the current function in the top frame. -#define GET_CALLER_PC_BP_SP \ - uptr bp = GET_CURRENT_FRAME(); \ - uptr pc = GET_CALLER_PC(); \ - uptr local_stack; \ - uptr sp = (uptr)&local_stack - #define GET_CALLER_PC_BP \ uptr bp = GET_CURRENT_FRAME(); \ uptr pc = GET_CALLER_PC(); +#define GET_CALLER_PC_BP_SP \ + GET_CALLER_PC_BP; \ + uptr local_stack; \ + uptr sp = (uptr)&local_stack + // Use this macro if you want to print stack trace with the current // function in the top frame. -#define GET_CURRENT_PC_BP_SP \ +#define GET_CURRENT_PC_BP \ uptr bp = GET_CURRENT_FRAME(); \ - uptr pc = StackTrace::GetCurrentPc(); \ + uptr pc = StackTrace::GetCurrentPc() + +#define GET_CURRENT_PC_BP_SP \ + GET_CURRENT_PC_BP; \ uptr local_stack; \ uptr sp = (uptr)&local_stack |