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1//===-- asan_stack.h --------------------------------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file is a part of AddressSanitizer, an address sanity checker.10//11// ASan-private header for asan_stack.cpp.12//===----------------------------------------------------------------------===//13 14#ifndef ASAN_STACK_H15#define ASAN_STACK_H16 17#include "asan_flags.h"18#include "asan_thread.h"19#include "sanitizer_common/sanitizer_flags.h"20#include "sanitizer_common/sanitizer_stacktrace.h"21 22namespace __asan {23 24static const u32 kDefaultMallocContextSize = 30;25 26void SetMallocContextSize(u32 size);27u32 GetMallocContextSize();28 29} // namespace __asan30 31// NOTE: A Rule of thumb is to retrieve stack trace in the interceptors32// as early as possible (in functions exposed to the user), as we generally33// don't want stack trace to contain functions from ASan internals.34 35#define GET_STACK_TRACE(max_size, fast) \36 UNINITIALIZED BufferedStackTrace stack; \37 if (max_size <= 2) { \38 stack.size = max_size; \39 if (max_size > 0) { \40 stack.top_frame_bp = GET_CURRENT_FRAME(); \41 stack.trace_buffer[0] = StackTrace::GetCurrentPc(); \42 if (max_size > 1) \43 stack.trace_buffer[1] = GET_CALLER_PC(); \44 } \45 } else { \46 stack.Unwind(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(), nullptr, \47 fast, max_size); \48 }49 50#define GET_STACK_TRACE_FATAL(pc, bp) \51 UNINITIALIZED BufferedStackTrace stack; \52 stack.Unwind(pc, bp, nullptr, common_flags()->fast_unwind_on_fatal)53 54#define GET_STACK_TRACE_FATAL_HERE \55 GET_STACK_TRACE(kStackTraceMax, common_flags()->fast_unwind_on_fatal)56 57#define GET_STACK_TRACE_THREAD \58 GET_STACK_TRACE(kStackTraceMax, true)59 60#define GET_STACK_TRACE_MALLOC \61 GET_STACK_TRACE(GetMallocContextSize(), common_flags()->fast_unwind_on_malloc)62 63#define GET_STACK_TRACE_FREE GET_STACK_TRACE_MALLOC64 65#define PRINT_CURRENT_STACK() \66 { \67 GET_STACK_TRACE_FATAL_HERE; \68 stack.Print(); \69 }70 71#endif // ASAN_STACK_H72