diff options
Diffstat (limited to 'tests/bugs/write-behind/bug-1058663.c')
| -rw-r--r-- | tests/bugs/write-behind/bug-1058663.c | 158 |
1 files changed, 81 insertions, 77 deletions
diff --git a/tests/bugs/write-behind/bug-1058663.c b/tests/bugs/write-behind/bug-1058663.c index 5e522e98048..aedf97d7487 100644 --- a/tests/bugs/write-behind/bug-1058663.c +++ b/tests/bugs/write-behind/bug-1058663.c @@ -19,101 +19,105 @@ static int sigbus_received; /* test for truncate()/seek()/write()/mmap() * There should ne no SIGBUS triggered. */ -void seek_write(char *filename) +void +seek_write(char *filename) { - int fd; - uint8_t *map; - int i; - - fd = open(filename, O_RDWR|O_CREAT|O_TRUNC, 0600); - lseek(fd, FILE_SIZE - 1, SEEK_SET); - write(fd, "\xff", 1); - - map = mmap(NULL, FILE_SIZE, PROT_READ, MAP_PRIVATE, fd, 0); - for (i = 0; i < (FILE_SIZE - 1); i++) { - if (map[i] != 0) /* should never be true */ - abort(); - } - munmap(map, FILE_SIZE); - - close(fd); + int fd; + uint8_t *map; + int i; + + fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, 0600); + lseek(fd, FILE_SIZE - 1, SEEK_SET); + write(fd, "\xff", 1); + + map = mmap(NULL, FILE_SIZE, PROT_READ, MAP_PRIVATE, fd, 0); + for (i = 0; i < (FILE_SIZE - 1); i++) { + if (map[i] != 0) /* should never be true */ + abort(); + } + munmap(map, FILE_SIZE); + + close(fd); } -int read_after_eof(char *filename) +int +read_after_eof(char *filename) { - int ret = 0; - int fd; - char *data; - uint8_t *map; - - fd = open(filename, O_RDWR|O_CREAT|O_TRUNC, 0600); - lseek(fd, FILE_SIZE - 1, SEEK_SET); - write(fd, "\xff", 1); - - /* trigger verify that reading after EOF fails */ - ret = read(fd, data, FILE_SIZE / 2); - if (ret != 0) - return 1; - - /* map an area of 1 byte after FILE_SIZE */ - map = mmap(NULL, 1, PROT_READ, MAP_PRIVATE, fd, FILE_SIZE); - /* map[0] is an access after EOF, it should trigger SIGBUS */ - if (map[0] != 0) - /* it is expected that we exit before we get here */ - if (!sigbus_received) - return 1; - munmap(map, FILE_SIZE); - - close(fd); - - return ret; + int ret = 0; + int fd; + char *data; + uint8_t *map; + + fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, 0600); + lseek(fd, FILE_SIZE - 1, SEEK_SET); + write(fd, "\xff", 1); + + /* trigger verify that reading after EOF fails */ + ret = read(fd, data, FILE_SIZE / 2); + if (ret != 0) + return 1; + + /* map an area of 1 byte after FILE_SIZE */ + map = mmap(NULL, 1, PROT_READ, MAP_PRIVATE, fd, FILE_SIZE); + /* map[0] is an access after EOF, it should trigger SIGBUS */ + if (map[0] != 0) + /* it is expected that we exit before we get here */ + if (!sigbus_received) + return 1; + munmap(map, FILE_SIZE); + + close(fd); + + return ret; } /* signal handler for SIGBUS */ -void catch_sigbus(int signum) +void +catch_sigbus(int signum) { - switch (signum) { + switch (signum) { #ifdef __NetBSD__ - /* Depending on architecture, we can get SIGSEGV */ - case SIGSEGV: /* FALLTHROUGH */ + /* Depending on architecture, we can get SIGSEGV */ + case SIGSEGV: /* FALLTHROUGH */ #endif - case SIGBUS: - sigbus_received++; - if (!expect_sigbus) - exit(EXIT_FAILURE); - if (sigbus_received >= MAX_SIGBUS) - exit(EXIT_SUCCESS); - break; - default: - printf("Unexpected signal received: %d\n", signum); - } + case SIGBUS: + sigbus_received++; + if (!expect_sigbus) + exit(EXIT_FAILURE); + if (sigbus_received >= MAX_SIGBUS) + exit(EXIT_SUCCESS); + break; + default: + printf("Unexpected signal received: %d\n", signum); + } } -int main(int argc, char **argv) +int +main(int argc, char **argv) { - int i = 0; + int i = 0; - if (argc == 1) { - printf("Usage: %s <filename>\n", argv[0]); - return EXIT_FAILURE; - } + if (argc == 1) { + printf("Usage: %s <filename>\n", argv[0]); + return EXIT_FAILURE; + } #ifdef __NetBSD__ - /* Depending on architecture, we can get SIGSEGV */ - signal(SIGSEGV, catch_sigbus); + /* Depending on architecture, we can get SIGSEGV */ + signal(SIGSEGV, catch_sigbus); #endif - signal(SIGBUS, catch_sigbus); + signal(SIGBUS, catch_sigbus); - /* the next test should not trigger SIGBUS */ - expect_sigbus = 0; - for (i = 0; i < RUN_LOOP; i++) { - seek_write(argv[1]); - } + /* the next test should not trigger SIGBUS */ + expect_sigbus = 0; + for (i = 0; i < RUN_LOOP; i++) { + seek_write(argv[1]); + } - /* the next test should trigger SIGBUS */ - expect_sigbus = 1; - if (read_after_eof(argv[1])) - return EXIT_FAILURE; + /* the next test should trigger SIGBUS */ + expect_sigbus = 1; + if (read_after_eof(argv[1])) + return EXIT_FAILURE; - return EXIT_SUCCESS; + return EXIT_SUCCESS; } |