| 1 | //===--- Stack smashing test to check stack canary set up ----------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "src/__support/CPP/string.h" |
| 10 | #include "src/__support/OSUtil/io.h" |
| 11 | #include "src/pthread/pthread_atfork.h" |
| 12 | #include "src/signal/raise.h" |
| 13 | #include "src/sys/wait/wait.h" |
| 14 | #include "src/sys/wait/wait4.h" |
| 15 | #include "src/sys/wait/waitpid.h" |
| 16 | #include "src/unistd/fork.h" |
| 17 | |
| 18 | #include "test/IntegrationTest/test.h" |
| 19 | |
| 20 | #include <signal.h> |
| 21 | #include <sys/wait.h> |
| 22 | #include <unistd.h> |
| 23 | |
| 24 | void no_stack_smashing_normal_exit() { |
| 25 | pid_t pid = LIBC_NAMESPACE::fork(); |
| 26 | if (pid == 0) { |
| 27 | // Child process |
| 28 | char foo[30]; |
| 29 | for (int i = 0; i < 30; i++) |
| 30 | foo[i] = (foo[i] != 42) ? 42 : 24; |
| 31 | return; |
| 32 | } |
| 33 | ASSERT_TRUE(pid > 0); |
| 34 | int status; |
| 35 | pid_t cpid = LIBC_NAMESPACE::wait(&status); |
| 36 | ASSERT_TRUE(cpid > 0); |
| 37 | ASSERT_EQ(cpid, pid); |
| 38 | ASSERT_TRUE(WIFEXITED(status)); |
| 39 | } |
| 40 | |
| 41 | void stack_smashing_abort() { |
| 42 | pid_t pid = LIBC_NAMESPACE::fork(); |
| 43 | if (pid == 0) { |
| 44 | // Child process |
| 45 | char foo[30]; |
| 46 | char *frame_ptr = static_cast<char *>(__builtin_frame_address(0)); |
| 47 | char *cur_ptr = &foo[0]; |
| 48 | // Corrupt the stack |
| 49 | while (cur_ptr != frame_ptr) { |
| 50 | *cur_ptr = (*cur_ptr != 42) ? 42 : 24; |
| 51 | cur_ptr++; |
| 52 | } |
| 53 | return; |
| 54 | } |
| 55 | ASSERT_TRUE(pid > 0); |
| 56 | int status; |
| 57 | pid_t cpid = LIBC_NAMESPACE::wait(&status); |
| 58 | ASSERT_TRUE(cpid > 0); |
| 59 | ASSERT_EQ(cpid, pid); |
| 60 | ASSERT_TRUE(WTERMSIG(status) == SIGABRT); |
| 61 | } |
| 62 | |
| 63 | TEST_MAIN(int argc, char **argv, char **envp) { |
| 64 | no_stack_smashing_normal_exit(); |
| 65 | stack_smashing_abort(); |
| 66 | return 0; |
| 67 | } |
| 68 |