155 lines
5.8 KiB
C++
155 lines
5.8 KiB
C++
// RUN: %clangxx_msan -O0 %s -o %t && %run %t 2>&1
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// RUN: %clangxx_msan -O3 %s -o %t && %run %t 2>&1
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#include <assert.h>
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#include <errno.h>
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#include <glob.h>
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#include <stdio.h>
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#include <string.h>
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#include <linux/aio_abi.h>
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#include <signal.h>
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#include <sys/epoll.h>
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#include <sys/ptrace.h>
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#include <sys/stat.h>
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#include <sys/uio.h>
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#include <sanitizer/linux_syscall_hooks.h>
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#include <sanitizer/msan_interface.h>
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/* Test the presence of __sanitizer_syscall_ in the tool runtime, and general
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sanity of their behaviour. */
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int main(int argc, char *argv[]) {
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char buf[1000] __attribute__((aligned(8)));
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const int kTen = 10;
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const int kFortyTwo = 42;
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memset(buf, 0, sizeof(buf));
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__msan_unpoison(buf, sizeof(buf));
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__sanitizer_syscall_pre_recvmsg(0, buf, 0);
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__sanitizer_syscall_pre_rt_sigpending(buf, kTen);
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__sanitizer_syscall_pre_getdents(0, buf, kTen);
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__sanitizer_syscall_pre_getdents64(0, buf, kTen);
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__msan_unpoison(buf, sizeof(buf));
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__sanitizer_syscall_post_recvmsg(0, 0, buf, 0);
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__sanitizer_syscall_post_rt_sigpending(-1, buf, kTen);
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__sanitizer_syscall_post_getdents(0, 0, buf, kTen);
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__sanitizer_syscall_post_getdents64(0, 0, buf, kTen);
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assert(__msan_test_shadow(buf, sizeof(buf)) == -1);
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__msan_unpoison(buf, sizeof(buf));
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__sanitizer_syscall_post_recvmsg(kTen, 0, buf, 0);
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// Tell the kernel that the output struct size is 10 bytes, verify that those
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// bytes are unpoisoned, and the next byte is not.
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__msan_poison(buf, kTen + 1);
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__sanitizer_syscall_post_rt_sigpending(0, buf, kTen);
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assert(__msan_test_shadow(buf, sizeof(buf)) == kTen);
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__msan_poison(buf, kTen + 1);
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__sanitizer_syscall_post_getdents(kTen, 0, buf, kTen);
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assert(__msan_test_shadow(buf, sizeof(buf)) == kTen);
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__msan_poison(buf, kTen + 1);
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__sanitizer_syscall_post_getdents64(kTen, 0, buf, kTen);
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assert(__msan_test_shadow(buf, sizeof(buf)) == kTen);
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__msan_poison(buf, sizeof(buf));
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__sanitizer_syscall_post_clock_getres(0, 0, buf);
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assert(__msan_test_shadow(buf, sizeof(buf)) == sizeof(long) * 2);
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__msan_poison(buf, sizeof(buf));
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__sanitizer_syscall_post_clock_gettime(0, 0, buf);
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assert(__msan_test_shadow(buf, sizeof(buf)) == sizeof(long) * 2);
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// Failed syscall does not write to the buffer.
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__msan_poison(buf, sizeof(buf));
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__sanitizer_syscall_post_clock_gettime(-1, 0, buf);
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assert(__msan_test_shadow(buf, sizeof(buf)) == 0);
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__msan_poison(buf, sizeof(buf));
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__sanitizer_syscall_post_read(5, 42, buf, 10);
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assert(__msan_test_shadow(buf, sizeof(buf)) == 5);
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__msan_poison(buf, sizeof(buf));
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__sanitizer_syscall_post_newfstatat(0, 5, "/path/to/file", buf, 0);
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assert(__msan_test_shadow(buf, sizeof(buf)) == sizeof(struct stat));
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__msan_poison(buf, sizeof(buf));
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int prio = 0;
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__sanitizer_syscall_post_mq_timedreceive(kFortyTwo, 5, buf, sizeof(buf), &prio, 0);
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assert(__msan_test_shadow(buf, sizeof(buf)) == kFortyTwo);
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assert(__msan_test_shadow(&prio, sizeof(prio)) == -1);
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__msan_poison(buf, sizeof(buf));
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__sanitizer_syscall_post_ptrace(0, PTRACE_PEEKUSER, kFortyTwo, 0xABCD, buf);
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assert(__msan_test_shadow(buf, sizeof(buf)) == sizeof(void *));
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__msan_poison(buf, sizeof(buf));
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struct iocb iocb[3];
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struct iocb *iocbp[3] = { &iocb[0], &iocb[1], &iocb[2] };
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memset(iocb, 0, sizeof(iocb));
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iocb[0].aio_lio_opcode = IOCB_CMD_PREAD;
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iocb[0].aio_buf = (__u64)buf;
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iocb[0].aio_nbytes = 10;
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iocb[1].aio_lio_opcode = IOCB_CMD_PREAD;
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iocb[1].aio_buf = (__u64)(&buf[20]);
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iocb[1].aio_nbytes = 15;
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struct iovec vec[2] = { {&buf[40], 3}, {&buf[50], 20} };
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iocb[2].aio_lio_opcode = IOCB_CMD_PREADV;
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iocb[2].aio_buf = (__u64)(&vec);
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iocb[2].aio_nbytes = 2;
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__sanitizer_syscall_pre_io_submit(0, 3, &iocbp);
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assert(__msan_test_shadow(buf, sizeof(buf)) == 10);
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assert(__msan_test_shadow(buf + 20, sizeof(buf) - 20) == 15);
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assert(__msan_test_shadow(buf + 40, sizeof(buf) - 40) == 3);
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assert(__msan_test_shadow(buf + 50, sizeof(buf) - 50) == 20);
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__msan_poison(buf, sizeof(buf));
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char *p = buf;
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__msan_poison(&p, sizeof(p));
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__sanitizer_syscall_post_io_setup(0, 1, &p);
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assert(__msan_test_shadow(&p, sizeof(p)) == -1);
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assert(__msan_test_shadow(buf, sizeof(buf)) >= 32);
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__msan_poison(buf, sizeof(buf));
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__sanitizer_syscall_post_pipe(0, (int *)buf);
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assert(__msan_test_shadow(buf, sizeof(buf)) == 2 * sizeof(int));
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__msan_poison(buf, sizeof(buf));
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__sanitizer_syscall_post_pipe2(0, (int *)buf, 0);
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assert(__msan_test_shadow(buf, sizeof(buf)) == 2 * sizeof(int));
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__msan_poison(buf, sizeof(buf));
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__sanitizer_syscall_post_socketpair(0, 0, 0, 0, (int *)buf);
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assert(__msan_test_shadow(buf, sizeof(buf)) == 2 * sizeof(int));
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__msan_poison(buf, sizeof(buf));
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__sanitizer_syscall_post_sigaltstack(0, nullptr, (stack_t *)buf);
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assert(__msan_test_shadow(buf, sizeof(buf)) == sizeof(stack_t));
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__msan_poison(buf, sizeof(buf));
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long max_events = sizeof(buf) / sizeof(epoll_event);
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__sanitizer_syscall_pre_epoll_wait(0, buf, max_events, 0);
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__sanitizer_syscall_post_epoll_wait(max_events, 0, buf, max_events, 0);
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assert(__msan_test_shadow(buf, sizeof(buf)) == max_events * sizeof(epoll_event));
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__msan_poison(buf, sizeof(buf));
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sigset_t sigset = {};
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__sanitizer_syscall_pre_epoll_pwait(0, buf, max_events, 0, &sigset, sizeof(sigset));
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__sanitizer_syscall_post_epoll_pwait(max_events, 0, buf, max_events, 0, &sigset, sizeof(sigset));
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assert(__msan_test_shadow(buf, sizeof(buf)) == max_events * sizeof(epoll_event));
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__msan_poison(buf, sizeof(buf));
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sigset = {};
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timespec timespec = {};
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__sanitizer_syscall_pre_epoll_pwait2(0, buf, max_events, ×pec,
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&sigset, sizeof(sigset));
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__sanitizer_syscall_post_epoll_pwait2(max_events, 0, buf, max_events,
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×pec, &sigset, sizeof(sigset));
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assert(__msan_test_shadow(buf, sizeof(buf)) == max_events * sizeof(epoll_event));
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return 0;
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}
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