| //===-- asan_stack.h --------------------------------------------*- C++ -*-===// |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a part of AddressSanitizer, an address sanity checker. |
| // |
| // ASan-private header for asan_stack.cc. |
| //===----------------------------------------------------------------------===// |
| #ifndef ASAN_STACK_H |
| #define ASAN_STACK_H |
| |
| #include "asan_flags.h" |
| #include "asan_thread.h" |
| #include "sanitizer_common/sanitizer_flags.h" |
| #include "sanitizer_common/sanitizer_stacktrace.h" |
| |
| namespace __asan { |
| |
| // 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. |
| ALWAYS_INLINE |
| void GetStackTraceWithPcBpAndContext(StackTrace *stack, uptr max_depth, uptr pc, |
| uptr bp, void *context, bool fast) { |
| #if SANITIZER_WINDOWS |
| stack->Unwind(max_depth, pc, bp, context, 0, 0, fast); |
| #else |
| AsanThread *t; |
| stack->size = 0; |
| if (LIKELY(asan_inited)) { |
| if ((t = GetCurrentThread()) && !t->isUnwinding()) { |
| uptr stack_top = t->stack_top(); |
| uptr stack_bottom = t->stack_bottom(); |
| ScopedUnwinding unwind_scope(t); |
| stack->Unwind(max_depth, pc, bp, context, stack_top, stack_bottom, fast); |
| } else if (t == 0 && !fast) { |
| /* If GetCurrentThread() has failed, try to do slow unwind anyways. */ |
| stack->Unwind(max_depth, pc, bp, context, 0, 0, false); |
| } |
| } |
| #endif // SANITIZER_WINDOWS |
| } |
| |
| } // namespace __asan |
| |
| // NOTE: A Rule of thumb is to retrieve stack trace in the interceptors |
| // as early as possible (in functions exposed to the user), as we generally |
| // don't want stack trace to contain functions from ASan internals. |
| |
| #define GET_STACK_TRACE(max_size, fast) \ |
| StackTrace stack; \ |
| if (max_size <= 2) { \ |
| stack.size = max_size; \ |
| if (max_size > 0) { \ |
| stack.top_frame_bp = GET_CURRENT_FRAME(); \ |
| stack.trace[0] = StackTrace::GetCurrentPc(); \ |
| if (max_size > 1) \ |
| stack.trace[1] = GET_CALLER_PC(); \ |
| } \ |
| } else { \ |
| GetStackTraceWithPcBpAndContext(&stack, max_size, \ |
| StackTrace::GetCurrentPc(), \ |
| GET_CURRENT_FRAME(), 0, fast); \ |
| } |
| |
| #define GET_STACK_TRACE_FATAL(pc, bp) \ |
| StackTrace stack; \ |
| GetStackTraceWithPcBpAndContext(&stack, kStackTraceMax, pc, bp, 0, \ |
| common_flags()->fast_unwind_on_fatal) |
| |
| #define GET_STACK_TRACE_SIGNAL(pc, bp, context) \ |
| StackTrace stack; \ |
| GetStackTraceWithPcBpAndContext(&stack, kStackTraceMax, pc, bp, context, \ |
| common_flags()->fast_unwind_on_fatal) |
| |
| #define GET_STACK_TRACE_FATAL_HERE \ |
| GET_STACK_TRACE(kStackTraceMax, common_flags()->fast_unwind_on_fatal) |
| |
| #define GET_STACK_TRACE_THREAD \ |
| GET_STACK_TRACE(kStackTraceMax, true) |
| |
| #define GET_STACK_TRACE_MALLOC \ |
| GET_STACK_TRACE(common_flags()->malloc_context_size, \ |
| common_flags()->fast_unwind_on_malloc) |
| |
| #define GET_STACK_TRACE_FREE GET_STACK_TRACE_MALLOC |
| |
| #define PRINT_CURRENT_STACK() \ |
| { \ |
| GET_STACK_TRACE_FATAL_HERE; \ |
| stack.Print(); \ |
| } |
| |
| #endif // ASAN_STACK_H |