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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-06-07 11:11:03 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-06-24 17:45:58 -0300 |
| commit | baf2a265c71113a91f6971313ef191be9e77ef6a (patch) | |
| tree | ad894e8766707e8c10e98b6e4c857ab315fa0276 /posix | |
| parent | 5b41b2659d35b72636ab50a28d6815cad9c22a66 (diff) | |
| download | glibc-baf2a265c71113a91f6971313ef191be9e77ef6a.zip glibc-baf2a265c71113a91f6971313ef191be9e77ef6a.tar.gz glibc-baf2a265c71113a91f6971313ef191be9e77ef6a.tar.bz2 | |
misc: Optimize internal usage of __libc_single_threaded
By adding an internal alias to avoid the GOT indirection.
On some architecture, __libc_single_thread may be accessed through
copy relocations and thus it requires to update also the copies
default copy.
This is done by adding a new internal macro,
libc_hidden_data_{proto,def}, which has an addition argument that
specifies the alias name (instead of default __GI_ one).
Checked on x86_64-linux-gnu and i686-linux-gnu.
Reviewed-by: Fangrui Song <maskray@google.com>
Diffstat (limited to 'posix')
| -rw-r--r-- | posix/fork.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/posix/fork.c b/posix/fork.c index e1be342..987916a 100644 --- a/posix/fork.c +++ b/posix/fork.c @@ -45,7 +45,7 @@ __libc_fork (void) requirement for fork (Austin Group tracker issue #62) this is best effort to make is async-signal-safe at least for single-thread case. */ - bool multiple_threads = __libc_single_threaded == 0; + bool multiple_threads = __libc_single_threaded_internal == 0; uint64_t lastrun; lastrun = __run_prefork_handlers (multiple_threads); |