43 lines
1.1 KiB
C++
43 lines
1.1 KiB
C++
// Check handle_bus flag
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// Defaults to true
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// RUN: %clangxx_asan -std=c++11 %s -o %t
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// RUN: not %run %t 2>&1 | FileCheck %s -check-prefix=CHECK-BUS
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// RUN: %env_asan_opts=handle_sigbus=0 not --crash %run %t 2>&1 | FileCheck %s
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// UNSUPPORTED: ios
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#include <assert.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include <string>
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char array[4096];
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int main(int argc, char **argv) {
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int fd = open((std::string(argv[0]) + ".m").c_str(), O_RDWR | O_CREAT, 0700);
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if (fd < 0) {
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perror("open");
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exit(1);
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}
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assert(write(fd, array, sizeof(array)) == sizeof(array));
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// Write some zeroes to the file, then mmap it while it has a 4KiB size
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char *addr = (char *)mmap(nullptr, sizeof(array), PROT_READ,
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MAP_FILE | MAP_SHARED, fd, 0);
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if (addr == MAP_FAILED) {
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perror("mmap");
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exit(1);
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}
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// Truncate the file so our memory isn't valid any more
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assert(ftruncate(fd, 0) == 0);
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// Try to access the memory
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return addr[42];
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// CHECK-NOT: DEADLYSIGNAL
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// CHECK-BUS: DEADLYSIGNAL
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// CHECK-BUS: ERROR: AddressSanitizer: BUS
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}
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