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>
56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
// RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
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#include <sanitizer/asan_interface.h>
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#include <stdio.h>
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#include <stdlib.h>
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// If we use %p with MS CRTs, it comes out all upper case. Use %08x to get
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// lowercase hex.
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#ifdef _WIN32
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# ifdef _WIN64
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# define PTR_FMT "0x%08llx"
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# else
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# define PTR_FMT "0x%08x"
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# endif
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// Solaris libc omits the leading 0x.
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#elif defined(__sun__) && defined(__svr4__)
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# define PTR_FMT "0x%p"
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#else
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# define PTR_FMT "%p"
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#endif
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char *heap_ptr;
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int main() {
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// Disable stderr buffering. Needed on Windows.
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setvbuf(stderr, NULL, _IONBF, 0);
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heap_ptr = (char *)malloc(10);
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fprintf(stderr, "heap_ptr: " PTR_FMT "\n", heap_ptr);
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// CHECK: heap_ptr: 0x[[ADDR:[0-9a-f]+]]
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free(heap_ptr);
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free(heap_ptr); // BOOM
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return 0;
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}
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// Required for dyld macOS 12.0+
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#if (__APPLE__)
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__attribute__((weak))
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#endif
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extern "C" void
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__asan_on_error() {
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int present = __asan_report_present();
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void *addr = __asan_get_report_address();
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const char *description = __asan_get_report_description();
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fprintf(stderr, "%s\n", (present == 1) ? "report present" : "");
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// CHECK: report present
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fprintf(stderr, "addr: " PTR_FMT "\n", addr);
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// CHECK: addr: {{0x0*}}[[ADDR]]
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fprintf(stderr, "description: %s\n", description);
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// CHECK: description: double-free
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}
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// CHECK: AddressSanitizer: attempting double-free on {{0x0*}}[[ADDR]] in thread T0
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