forked from OSchip/llvm-project
105 lines
3.7 KiB
C++
105 lines
3.7 KiB
C++
//===-- asan_stack.h --------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of AddressSanitizer, an address sanity checker.
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//
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// ASan-private header for asan_stack.cc.
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//===----------------------------------------------------------------------===//
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#ifndef ASAN_STACK_H
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#define ASAN_STACK_H
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#include "asan_internal.h"
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namespace __asan {
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static const size_t kStackTraceMax = 64;
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struct AsanStackTrace {
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size_t size;
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size_t max_size;
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uintptr_t trace[kStackTraceMax];
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static void PrintStack(uintptr_t *addr, size_t size);
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void PrintStack() {
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PrintStack(this->trace, this->size);
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}
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void CopyTo(uintptr_t *dst, size_t dst_size) {
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for (size_t i = 0; i < size && i < dst_size; i++)
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dst[i] = trace[i];
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for (size_t i = size; i < dst_size; i++)
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dst[i] = 0;
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}
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void CopyFrom(uintptr_t *src, size_t src_size) {
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size = src_size;
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if (size > kStackTraceMax) size = kStackTraceMax;
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for (size_t i = 0; i < size; i++) {
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trace[i] = src[i];
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}
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}
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void GetStackTrace(size_t max_s, uintptr_t pc, uintptr_t bp);
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void FastUnwindStack(uintptr_t pc, uintptr_t bp);
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static uintptr_t GetCurrentPc();
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static size_t CompressStack(AsanStackTrace *stack,
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uint32_t *compressed, size_t size);
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static void UncompressStack(AsanStackTrace *stack,
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uint32_t *compressed, size_t size);
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};
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} // namespace __asan
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// Use this macro if you want to print stack trace with the caller
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// of the current function in the top frame.
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#define GET_CALLER_PC_BP_SP \
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uintptr_t bp = GET_CURRENT_FRAME(); \
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uintptr_t pc = GET_CALLER_PC(); \
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uintptr_t local_stack; \
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uintptr_t sp = (uintptr_t)&local_stack;
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// Use this macro if you want to print stack trace with the current
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// function in the top frame.
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#define GET_CURRENT_PC_BP_SP \
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uintptr_t bp = GET_CURRENT_FRAME(); \
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uintptr_t pc = AsanStackTrace::GetCurrentPc(); \
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uintptr_t local_stack; \
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uintptr_t sp = (uintptr_t)&local_stack;
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// Get the stack trace with the given pc and bp.
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// The pc will be in the position 0 of the resulting stack trace.
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// The bp may refer to the current frame or to the caller's frame.
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// fast_unwind is currently unused.
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#define GET_STACK_TRACE_WITH_PC_AND_BP(max_s, pc, bp) \
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AsanStackTrace stack; \
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stack.GetStackTrace(max_s, pc, bp); \
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// NOTE: A Rule of thumb is to retrieve stack trace in the interceptors
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// as early as possible (in functions exposed to the user), as we generally
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// don't want stack trace to contain functions from ASan internals.
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#define GET_STACK_TRACE_HERE(max_size) \
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GET_STACK_TRACE_WITH_PC_AND_BP(max_size, \
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AsanStackTrace::GetCurrentPc(), GET_CURRENT_FRAME()) \
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#define GET_STACK_TRACE_HERE_FOR_MALLOC \
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GET_STACK_TRACE_HERE(FLAG_malloc_context_size)
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#define GET_STACK_TRACE_HERE_FOR_FREE(ptr) \
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GET_STACK_TRACE_HERE(FLAG_malloc_context_size)
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#define PRINT_CURRENT_STACK() \
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{ \
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GET_STACK_TRACE_HERE(kStackTraceMax); \
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stack.PrintStack(); \
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} \
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#endif // ASAN_STACK_H
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