diff options
Diffstat (limited to 'tools/testing/selftests/proc')
| -rw-r--r-- | tools/testing/selftests/proc/.gitignore | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/proc/Makefile | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/proc/proc.h | 5 | ||||
| -rw-r--r-- | tools/testing/selftests/proc/thread-self.c | 64 |
4 files changed, 71 insertions, 0 deletions
diff --git a/tools/testing/selftests/proc/.gitignore b/tools/testing/selftests/proc/.gitignore index ee33d6c3137f..82121a81681f 100644 --- a/tools/testing/selftests/proc/.gitignore +++ b/tools/testing/selftests/proc/.gitignore @@ -10,3 +10,4 @@ /proc-uptime-002 /read /self +/thread-self diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile index 344bca8e4b28..1c12c34cf85d 100644 --- a/tools/testing/selftests/proc/Makefile +++ b/tools/testing/selftests/proc/Makefile @@ -14,5 +14,6 @@ TEST_GEN_PROGS += proc-uptime-001 TEST_GEN_PROGS += proc-uptime-002 TEST_GEN_PROGS += read TEST_GEN_PROGS += self +TEST_GEN_PROGS += thread-self include ../lib.mk diff --git a/tools/testing/selftests/proc/proc.h b/tools/testing/selftests/proc/proc.h index 31ca4b0c007f..b7d57ea40237 100644 --- a/tools/testing/selftests/proc/proc.h +++ b/tools/testing/selftests/proc/proc.h @@ -14,6 +14,11 @@ static inline pid_t sys_getpid(void) return syscall(SYS_getpid); } +static inline pid_t sys_gettid(void) +{ + return syscall(SYS_gettid); +} + static inline bool streq(const char *s1, const char *s2) { return strcmp(s1, s2) == 0; diff --git a/tools/testing/selftests/proc/thread-self.c b/tools/testing/selftests/proc/thread-self.c new file mode 100644 index 000000000000..4b23b39b7ae0 --- /dev/null +++ b/tools/testing/selftests/proc/thread-self.c @@ -0,0 +1,64 @@ +/* + * Copyright © 2018 Alexey Dobriyan <adobriyan@gmail.com> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ +// Test that /proc/thread-self gives correct TGID/PID. +#undef NDEBUG +#include <assert.h> +#include <sched.h> +#include <stdio.h> +#include <unistd.h> +#include <sys/mman.h> +#include <sys/wait.h> + +#include "proc.h" + +int f(void *arg) +{ + char buf1[64], buf2[64]; + pid_t pid, tid; + ssize_t rv; + + pid = sys_getpid(); + tid = sys_gettid(); + snprintf(buf1, sizeof(buf1), "%u/task/%u", pid, tid); + + rv = readlink("/proc/thread-self", buf2, sizeof(buf2)); + assert(rv == strlen(buf1)); + buf2[rv] = '\0'; + assert(streq(buf1, buf2)); + + if (arg) + exit(0); + return 0; +} + +int main(void) +{ + const int PAGE_SIZE = sysconf(_SC_PAGESIZE); + pid_t pid; + void *stack; + + /* main thread */ + f((void *)0); + + stack = mmap(NULL, 2 * PAGE_SIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); + assert(stack != MAP_FAILED); + /* side thread */ + pid = clone(f, stack + PAGE_SIZE, CLONE_THREAD|CLONE_SIGHAND|CLONE_VM, (void *)1); + assert(pid > 0); + pause(); + + return 0; +} |