derek.holloway
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83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
// Checks that the ASan debugging API for getting report information
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// returns correct values.
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// 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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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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char *heap_ptr = (char *)malloc(10);
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free(heap_ptr);
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int present = __asan_report_present();
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fprintf(stderr, "%s\n", (present == 0) ? "no report" : "");
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// CHECK: no report
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heap_ptr[0] = 'A'; // 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
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__asan_on_error() {
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int present = __asan_report_present();
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void *pc = __asan_get_report_pc();
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void *bp = __asan_get_report_bp();
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void *sp = __asan_get_report_sp();
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void *addr = __asan_get_report_address();
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int is_write = __asan_get_report_access_type();
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size_t access_size = __asan_get_report_access_size();
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const char *description = __asan_get_report_description();
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fprintf(stderr, "%s\n", (present == 1) ? "report" : "");
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// CHECK: report
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fprintf(stderr, "pc: " PTR_FMT "\n", pc);
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// CHECK: pc: 0x[[PC:[0-9a-f]+]]
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fprintf(stderr, "bp: " PTR_FMT "\n", bp);
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// CHECK: bp: 0x[[BP:[0-9a-f]+]]
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fprintf(stderr, "sp: " PTR_FMT "\n", sp);
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// CHECK: sp: 0x[[SP:[0-9a-f]+]]
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fprintf(stderr, "addr: " PTR_FMT "\n", addr);
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// CHECK: addr: 0x[[ADDR:[0-9a-f]+]]
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fprintf(stderr, "type: %s\n", (is_write ? "write" : "read"));
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// CHECK: type: write
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fprintf(stderr, "access_size: %zu\n", access_size);
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// CHECK: access_size: 1
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fprintf(stderr, "description: %s\n", description);
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// CHECK: description: heap-use-after-free
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const void *addr2 = NULL;
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size_t size2 = 0;
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int is_dest = __asan_get_report_dest_address(&addr2, &size2);
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fprintf(stderr, "is_dest: %d, addr2: " PTR_FMT ", size2: %zu\n", is_dest,
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addr2, size2);
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// CHECK: is_dest: 1, addr2: 0x[[ADDR]], size2: 1
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int is_src = __asan_get_report_src_address(&addr2, &size2);
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fprintf(stderr, "is_src: %d\n", is_src);
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// CHECK: is_src: 0
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}
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// CHECK: AddressSanitizer: heap-use-after-free on address {{0x0*}}[[ADDR]] at pc {{0x0*}}[[PC]] bp {{0x0*}}[[BP]] sp {{0x0*}}[[SP]]
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// CHECK: WRITE of size 1 at {{0x0*}}[[ADDR]] thread T0
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