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