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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-12-07 17:17:24 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-06-09 15:16:45 -0300 |
| commit | a6c813d0ad0fd9830f2cd3c3d079af8d2aa50a1f (patch) | |
| tree | 4a76233e9a815b23428b380ec689491ec9b8f7b4 /nptl/pthreadP.h | |
| parent | f779b1efb35fe141e47952af3ac7f0540acca401 (diff) | |
| download | glibc-a6c813d0ad0fd9830f2cd3c3d079af8d2aa50a1f.tar.gz glibc-a6c813d0ad0fd9830f2cd3c3d079af8d2aa50a1f.tar.xz glibc-a6c813d0ad0fd9830f2cd3c3d079af8d2aa50a1f.zip | |
nptl: Use pthread_kill on pthread_cancel
It consolidates the tgkill call and it is the first step of making pthread_cancel async-signal-safe. It also fix a possible issue where the 'struct pthread' tid is not read atomically, which might send an invalid cancellation signal (similar to what db988e50a87f613cb6b9e98a2fc66a4848bc3546 fixed for pthread_join). Checked on x86_64-linux-gnu and aarch64-linux-gnu.
Diffstat (limited to 'nptl/pthreadP.h')
| -rw-r--r-- | nptl/pthreadP.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h index 618922f47a..675d1de753 100644 --- a/nptl/pthreadP.h +++ b/nptl/pthreadP.h @@ -515,6 +515,8 @@ libc_hidden_proto (__pthread_detach) extern int __pthread_kill (pthread_t threadid, int signo); libc_hidden_proto (__pthread_kill) extern int __pthread_cancel (pthread_t th); +extern int __pthread_kill_internal (pthread_t threadid, int signo) + attribute_hidden; extern void __pthread_exit (void *value) __attribute__ ((__noreturn__)); libc_hidden_proto (__pthread_exit) extern int __pthread_join (pthread_t threadid, void **thread_return); |