53a81d4d26
This reapplies 8fa66c6ca7 ([asan][windows]
Eliminate the static asan runtime on windows) for a second time.
That PR bounced off the tests because it caused failures in the other
sanitizer runtimes, these have been fixed by only building interception,
sanitizer_common, and asan with /MD, and continuing to build the rest of
the runtimes with /MT. This does mean that any usage of the static
ubsan/fuzzer/etc runtimes will mean you're mixing different runtime
library linkages in the same app, the interception, sanitizer_common,
and asan runtimes are designed for this, however it does result in some
linker warnings.
Additionally, it turns out when building in release-mode with
LLVM_ENABLE_PDBs the build system forced /OPT:ICF. This totally breaks
asan's "new" method of doing "weak" functions on windows, and so
/OPT:NOICF was explicitly added to asan's link flags.
---------
Co-authored-by: Amy Wishnousky <amyw@microsoft.com>
24 lines
863 B
C++
24 lines
863 B
C++
// RUN: %clang_cl_asan %Od %s %Fe%t
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// RUN: not %run %t 2>&1 | FileCheck %s
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#include <malloc.h>
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int main() {
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char *buffer = (char*)realloc(0, 32),
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*stale = buffer;
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buffer = (char*)realloc(buffer, 64);
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// The 'stale' may now point to a free'd memory.
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stale[0] = 42;
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// CHECK: AddressSanitizer: heap-use-after-free on address [[ADDR:0x[0-9a-f]+]]
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// CHECK: WRITE of size 1 at [[ADDR]] thread T0
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// CHECK-NEXT: {{#0 .* main .*use_after_realloc.cpp}}:[[@LINE-3]]
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// CHECK: [[ADDR]] is located 0 bytes inside of 32-byte region
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// CHECK: freed by thread T0 here:
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// CHECK-NEXT: {{#0 .* realloc }}
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// CHECK: {{ #[1-3] .* main .*use_after_realloc.cpp}}:[[@LINE-9]]
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// CHECK: previously allocated by thread T0 here:
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// CHECK-NEXT: {{#0 .* realloc }}
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// CHECK: {{ #[1-3] .* main .*use_after_realloc.cpp}}:[[@LINE-14]]
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free(buffer);
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}
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