libsanitizer/ubsan/ubsan_diag_standalone.cpp

   1 //===-- ubsan_diag_standalone.cpp -----------------------------------------===//
   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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // Diagnostic reporting for the standalone UBSan runtime.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "ubsan_platform.h"
  14 #if CAN_SANITIZE_UB
  15 #include "ubsan_diag.h"
  16
  17 using namespace __ubsan;
  18
  19 void __sanitizer::BufferedStackTrace::UnwindImpl(
  20     uptr pc, uptr bp, void *context, bool request_fast, u32 max_depth) {
  21   uptr top = 0;
  22   uptr bottom = 0;
  23   if (StackTrace::WillUseFastUnwind(request_fast)) {
  24     GetThreadStackTopAndBottom(false, &top, &bottom);
  25     Unwind(max_depth, pc, bp, nullptr, top, bottom, true);
  26   } else
  27     Unwind(max_depth, pc, bp, context, 0, 0, false);
  28 }
  29
  30 extern "C" {
  31 SANITIZER_INTERFACE_ATTRIBUTE
  32 void __sanitizer_print_stack_trace() {
  33   GET_CURRENT_PC_BP;
  34   BufferedStackTrace stack;
  35   stack.Unwind(pc, bp, nullptr, common_flags()->fast_unwind_on_fatal);
  36   stack.Print();
  37 }
  38 } // extern "C"
  39
  40 #endif  // CAN_SANITIZE_UB