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| // RUN: %clangxx_msan -O0 %s -o %t && %run %t 2>&1
// RUN: %clangxx_msan -O3 %s -o %t && %run %t 2>&1
#include <assert.h>
#include <errno.h>
#include <glob.h>
#include <stdio.h>
#include <string.h>
#include <linux/aio_abi.h>
#include <sys/ptrace.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <sanitizer/linux_syscall_hooks.h>
#include <sanitizer/msan_interface.h>
/* Test the presence of __sanitizer_syscall_ in the tool runtime, and general
sanity of their behaviour. */
int main(int argc, char *argv[]) {
char buf[1000] __attribute__((aligned(8)));
const int kTen = 10;
const int kFortyTwo = 42;
memset(buf, 0, sizeof(buf));
__msan_unpoison(buf, sizeof(buf));
__sanitizer_syscall_pre_recvmsg(0, buf, 0);
__sanitizer_syscall_pre_rt_sigpending(buf, kTen);
__sanitizer_syscall_pre_getdents(0, buf, kTen);
__sanitizer_syscall_pre_getdents64(0, buf, kTen);
__msan_unpoison(buf, sizeof(buf));
__sanitizer_syscall_post_recvmsg(0, 0, buf, 0);
__sanitizer_syscall_post_rt_sigpending(-1, buf, kTen);
__sanitizer_syscall_post_getdents(0, 0, buf, kTen);
__sanitizer_syscall_post_getdents64(0, 0, buf, kTen);
assert(__msan_test_shadow(buf, sizeof(buf)) == -1);
__msan_unpoison(buf, sizeof(buf));
__sanitizer_syscall_post_recvmsg(kTen, 0, buf, 0);
// Tell the kernel that the output struct size is 10 bytes, verify that those
// bytes are unpoisoned, and the next byte is not.
__msan_poison(buf, kTen + 1);
__sanitizer_syscall_post_rt_sigpending(0, buf, kTen);
assert(__msan_test_shadow(buf, sizeof(buf)) == kTen);
__msan_poison(buf, kTen + 1);
__sanitizer_syscall_post_getdents(kTen, 0, buf, kTen);
assert(__msan_test_shadow(buf, sizeof(buf)) == kTen);
__msan_poison(buf, kTen + 1);
__sanitizer_syscall_post_getdents64(kTen, 0, buf, kTen);
assert(__msan_test_shadow(buf, sizeof(buf)) == kTen);
__msan_poison(buf, sizeof(buf));
__sanitizer_syscall_post_clock_getres(0, 0, buf);
assert(__msan_test_shadow(buf, sizeof(buf)) == sizeof(long) * 2);
__msan_poison(buf, sizeof(buf));
__sanitizer_syscall_post_clock_gettime(0, 0, buf);
assert(__msan_test_shadow(buf, sizeof(buf)) == sizeof(long) * 2);
// Failed syscall does not write to the buffer.
__msan_poison(buf, sizeof(buf));
__sanitizer_syscall_post_clock_gettime(-1, 0, buf);
assert(__msan_test_shadow(buf, sizeof(buf)) == 0);
__msan_poison(buf, sizeof(buf));
__sanitizer_syscall_post_read(5, 42, buf, 10);
assert(__msan_test_shadow(buf, sizeof(buf)) == 5);
__msan_poison(buf, sizeof(buf));
__sanitizer_syscall_post_newfstatat(0, 5, "/path/to/file", buf, 0);
assert(__msan_test_shadow(buf, sizeof(buf)) == sizeof(struct stat));
__msan_poison(buf, sizeof(buf));
int prio = 0;
__sanitizer_syscall_post_mq_timedreceive(kFortyTwo, 5, buf, sizeof(buf), &prio, 0);
assert(__msan_test_shadow(buf, sizeof(buf)) == kFortyTwo);
assert(__msan_test_shadow(&prio, sizeof(prio)) == -1);
__msan_poison(buf, sizeof(buf));
__sanitizer_syscall_post_ptrace(0, PTRACE_PEEKUSER, kFortyTwo, 0xABCD, buf);
assert(__msan_test_shadow(buf, sizeof(buf)) == sizeof(void *));
__msan_poison(buf, sizeof(buf));
struct iocb iocb[3];
struct iocb *iocbp[3] = { &iocb[0], &iocb[1], &iocb[2] };
memset(iocb, 0, sizeof(iocb));
iocb[0].aio_lio_opcode = IOCB_CMD_PREAD;
iocb[0].aio_buf = (__u64)buf;
iocb[0].aio_nbytes = 10;
iocb[1].aio_lio_opcode = IOCB_CMD_PREAD;
iocb[1].aio_buf = (__u64)(&buf[20]);
iocb[1].aio_nbytes = 15;
struct iovec vec[2] = { {&buf[40], 3}, {&buf[50], 20} };
iocb[2].aio_lio_opcode = IOCB_CMD_PREADV;
iocb[2].aio_buf = (__u64)(&vec);
iocb[2].aio_nbytes = 2;
__sanitizer_syscall_pre_io_submit(0, 3, &iocbp);
assert(__msan_test_shadow(buf, sizeof(buf)) == 10);
assert(__msan_test_shadow(buf + 20, sizeof(buf) - 20) == 15);
assert(__msan_test_shadow(buf + 40, sizeof(buf) - 40) == 3);
assert(__msan_test_shadow(buf + 50, sizeof(buf) - 50) == 20);
__msan_poison(buf, sizeof(buf));
char *p = buf;
__msan_poison(&p, sizeof(p));
__sanitizer_syscall_post_io_setup(0, 1, &p);
assert(__msan_test_shadow(&p, sizeof(p)) == -1);
assert(__msan_test_shadow(buf, sizeof(buf)) >= 32);
__msan_poison(buf, sizeof(buf));
__sanitizer_syscall_post_pipe(0, (int *)buf);
assert(__msan_test_shadow(buf, sizeof(buf)) == 2 * sizeof(int));
__msan_poison(buf, sizeof(buf));
__sanitizer_syscall_post_pipe2(0, (int *)buf, 0);
assert(__msan_test_shadow(buf, sizeof(buf)) == 2 * sizeof(int));
__msan_poison(buf, sizeof(buf));
__sanitizer_syscall_post_socketpair(0, 0, 0, 0, (int *)buf);
assert(__msan_test_shadow(buf, sizeof(buf)) == 2 * sizeof(int));
return 0;
}
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