73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
//===-- asan_debugging.cc -------------------------------------------------===//
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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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// This file contains various functions that are generally useful to call when
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// using a debugger (LLDB, GDB).
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//===----------------------------------------------------------------------===//
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#include "asan_allocator.h"
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#include "asan_flags.h"
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#include "asan_internal.h"
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#include "asan_mapping.h"
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#include "asan_thread.h"
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namespace __asan {
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uptr AsanGetStack(uptr addr, uptr *trace, uptr size, u32 *thread_id,
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bool alloc_stack) {
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AsanChunkView chunk = FindHeapChunkByAddress(addr);
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if (!chunk.IsValid()) return 0;
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StackTrace stack;
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if (alloc_stack) {
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if (chunk.AllocTid() == kInvalidTid) return 0;
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chunk.GetAllocStack(&stack);
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if (thread_id) *thread_id = chunk.AllocTid();
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} else {
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if (chunk.FreeTid() == kInvalidTid) return 0;
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chunk.GetFreeStack(&stack);
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if (thread_id) *thread_id = chunk.FreeTid();
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}
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if (trace && size) {
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if (size > kStackTraceMax)
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size = kStackTraceMax;
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if (size > stack.size)
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size = stack.size;
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for (uptr i = 0; i < size; i++)
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trace[i] = StackTrace::GetPreviousInstructionPc(stack.trace[i]);
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return size;
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}
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return 0;
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}
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} // namespace __asan
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using namespace __asan;
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SANITIZER_INTERFACE_ATTRIBUTE
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uptr __asan_get_alloc_stack(uptr addr, uptr *trace, uptr size, u32 *thread_id) {
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return AsanGetStack(addr, trace, size, thread_id, /* alloc_stack */ true);
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}
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SANITIZER_INTERFACE_ATTRIBUTE
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uptr __asan_get_free_stack(uptr addr, uptr *trace, uptr size, u32 *thread_id) {
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return AsanGetStack(addr, trace, size, thread_id, /* alloc_stack */ false);
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}
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SANITIZER_INTERFACE_ATTRIBUTE
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void __asan_get_shadow_mapping(uptr *shadow_scale, uptr *shadow_offset) {
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if (shadow_scale)
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*shadow_scale = SHADOW_SCALE;
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if (shadow_offset)
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*shadow_offset = SHADOW_OFFSET;
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}
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