derek.holloway
7502bf64a4
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60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
// Checks that the ASan debugging API for getting report information reports
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// memory overlap error details.
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// RUN: %clangxx_asan -O0 %if MSVC %{ /Oi %} %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 <string.h>
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char buffer[10] = "hello";
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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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// Trigger memcpy-param-overlap
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memcpy(buffer, buffer + 1, 3); // BOOM
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return 0;
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}
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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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// 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 __asan_on_error() {
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int present = __asan_report_present();
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fprintf(stderr, "%s\n", (present == 1) ? "report" : "");
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// CHECK: report
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const void *addr_src = NULL;
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size_t size_src = 0;
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int is_src = __asan_get_report_src_address(&addr_src, &size_src);
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fprintf(stderr, "is_src: %d, addr_src: " PTR_FMT ", size_src: %zu\n", is_src,
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addr_src, size_src);
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// CHECK: is_src: 1, addr_src: 0x{{[0-9a-f]+}}, size_src: 3
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const void *addr_dest = NULL;
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size_t size_dest = 0;
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int is_dest = __asan_get_report_dest_address(&addr_dest, &size_dest);
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fprintf(stderr, "is_dest: %d, addr_dest: " PTR_FMT ", size_dest: %zu\n",
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is_dest, addr_dest, size_dest);
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// CHECK: is_dest: 1, addr_dest: 0x{{[0-9a-f]+}}, size_dest: 3
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}
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// CHECK: memcpy-param-overlap
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