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| author | Rich Felker <dalias@aerifal.cx> | 2019-02-22 02:56:10 -0500 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2019-02-22 03:25:39 -0500 |
| commit | ba18c1ecc6a18203ad8496791154af86f706f632 (patch) | |
| tree | d1e407e0b4f3fbe9e4463e66c960473112159981 /src/thread | |
| parent | 7865d569de7b29dd90b94b5680ec7a2a86ed27af (diff) | |
| download | musl-ba18c1ecc6a18203ad8496791154af86f706f632.tar.gz musl-ba18c1ecc6a18203ad8496791154af86f706f632.tar.xz musl-ba18c1ecc6a18203ad8496791154af86f706f632.zip | |
add membarrier syscall wrapper, refactor dynamic tls install to use it
the motivation for this change is twofold. first, it gets the fallback logic out of the dynamic linker, improving code readability and organization. second, it provides application code that wants to use the membarrier syscall, which depends on preregistration of intent before the process becomes multithreaded unless unbounded latency is acceptable, with a symbol that, when linked, ensures that this registration happens.
Diffstat (limited to 'src/thread')
| -rw-r--r-- | src/thread/pthread_create.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/thread/pthread_create.c b/src/thread/pthread_create.c index 54c03554..7d4dc2ed 100644 --- a/src/thread/pthread_create.c +++ b/src/thread/pthread_create.c @@ -15,7 +15,7 @@ weak_alias(dummy_0, __release_ptc); weak_alias(dummy_0, __pthread_tsd_run_dtors); weak_alias(dummy_0, __do_orphaned_stdio_locks); weak_alias(dummy_0, __dl_thread_cleanup); -weak_alias(dummy_0, __dl_prepare_for_threads); +weak_alias(dummy_0, __membarrier_init); static int tl_lock_count; static int tl_lock_waiters; @@ -246,7 +246,7 @@ int __pthread_create(pthread_t *restrict res, const pthread_attr_t *restrict att init_file_lock(__stderr_used); __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, SIGPT_SET, 0, _NSIG/8); self->tsd = (void **)__pthread_tsd_main; - __dl_prepare_for_threads(); + __membarrier_init(); libc.threaded = 1; } if (attrp && !c11) attr = *attrp; |