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Linux: Move timer helper routines from librt to libc

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This adds several temporary GLIBC_PRIVATE exports.  The symbol names
are changed so that they all start with __timer_.

It is now possible to invoke the fork handler directly, so
pthread_atfork is no longer necessary.  The associated error cannot
happen anymore, and cancellation handling can be removed from
the helper thread routine.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
2021-06-25 10:51:31 +02:00
parent 1a5a653be2
commit 2c16cb88a6
7 changed files with 64 additions and 50 deletions
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sysdeps/nptl/fork.h
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@@ -20,6 +20,7 @@
#define _FORK_H
#include <assert.h>
#include <kernel-posix-timers.h>
#include <ldsodefs.h>
#include <list.h>
#include <mqueue.h>
@@ -44,6 +45,7 @@ fork_system_setup_after_fork (void)
__default_pthread_attr_lock = LLL_LOCK_INITIALIZER;
call_function_static_weak (__mq_notify_fork_subprocess);
call_function_static_weak (__timer_fork_subprocess);
}
/* In case of a fork() call the memory allocation in the child will be