7339ca278c
Summary: Adds two flavours of generic unwinder and all the supporting cruft. If the supporting allocator is okay with bringing in sanitizer_common, they can use the fast frame-pointer based unwinder from sanitizer_common. Otherwise, we also provide the backtrace() libc-based unwinder as well. Of course, the allocator can always specify its own unwinder and unwinder-symbolizer. The slightly changed output format is exemplified in the first comment on this patch. It now better incorporates backtrace information, and displays allocation details on the second line. Reviewers: eugenis, vlad.tsyrklevich Reviewed By: eugenis, vlad.tsyrklevich Subscribers: srhines, kubamracek, mgorny, cryptoad, #sanitizers, llvm-commits, morehouse Tags: #sanitizers, #llvm Differential Revision: https://reviews.llvm.org/D63841 llvm-svn: 364941
19 lines
439 B
C++
19 lines
439 B
C++
// REQUIRES: gwp_asan
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// RUN: %clangxx_gwp_asan %s -o %t
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// RUN: %expect_crash %run %t 2>&1 | FileCheck %s
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// CHECK: GWP-ASan detected a memory error
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// CHECK: Buffer underflow at 0x{{[a-f0-9]+}} (1 byte to the left
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// CHECK-SAME: of a {{[1-9][0-9]*}}-byte allocation
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#include <cstdlib>
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#include "page_size.h"
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int main() {
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char *Ptr =
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reinterpret_cast<char *>(malloc(pageSize()));
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volatile char x = *(Ptr - 1);
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return 0;
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}
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