glibc/sysdeps/nptl/pthread-functions.h
Carlos O'Donell 2827ab990a libc: Extend __libc_freeres framework (Bug 23329).
The __libc_freeres framework does not extend to non-libc.so objects.
This causes problems in general for valgrind and mtrace detecting
unfreed objects in both libdl.so and libpthread.so.  This change is
a pre-requisite to properly moving the malloc hooks out of malloc
since such a move now requires precise accounting of all allocated
data before destructors are run.

This commit adds a proper hook in libc.so.6 for both libdl.so and
for libpthread.so, this ensures that shm-directory.c which uses
freeit () to free memory is called properly.  We also remove the
nptl_freeres hook and fall back to using weak-ref-and-check idiom
for a loaded libpthread.so, thus making this process similar for
all DSOs.

Lastly we follow best practice and use explicit free calls for
both libdl.so and libpthread.so instead of the generic hook process
which has undefined order.

Tested on x86_64 with no regressions.

Signed-off-by: DJ Delorie <dj@redhat.com>
Signed-off-by: Carlos O'Donell <carlos@redhat.com>
2018-06-29 22:39:06 -04:00

116 lines
5.1 KiB
C

/* Copyright (C) 2003-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _PTHREAD_FUNCTIONS_H
#define _PTHREAD_FUNCTIONS_H 1
#include <pthread.h>
#include <setjmp.h>
#include <internaltypes.h>
#include <sysdep.h>
struct xid_command;
/* Data type shared with libc. The libc uses it to pass on calls to
the thread functions. */
struct pthread_functions
{
int (*ptr_pthread_attr_destroy) (pthread_attr_t *);
int (*ptr___pthread_attr_init_2_0) (pthread_attr_t *);
int (*ptr___pthread_attr_init_2_1) (pthread_attr_t *);
int (*ptr_pthread_attr_getdetachstate) (const pthread_attr_t *, int *);
int (*ptr_pthread_attr_setdetachstate) (pthread_attr_t *, int);
int (*ptr_pthread_attr_getinheritsched) (const pthread_attr_t *, int *);
int (*ptr_pthread_attr_setinheritsched) (pthread_attr_t *, int);
int (*ptr_pthread_attr_getschedparam) (const pthread_attr_t *,
struct sched_param *);
int (*ptr_pthread_attr_setschedparam) (pthread_attr_t *,
const struct sched_param *);
int (*ptr_pthread_attr_getschedpolicy) (const pthread_attr_t *, int *);
int (*ptr_pthread_attr_setschedpolicy) (pthread_attr_t *, int);
int (*ptr_pthread_attr_getscope) (const pthread_attr_t *, int *);
int (*ptr_pthread_attr_setscope) (pthread_attr_t *, int);
int (*ptr_pthread_condattr_destroy) (pthread_condattr_t *);
int (*ptr_pthread_condattr_init) (pthread_condattr_t *);
int (*ptr___pthread_cond_broadcast) (pthread_cond_t *);
int (*ptr___pthread_cond_destroy) (pthread_cond_t *);
int (*ptr___pthread_cond_init) (pthread_cond_t *,
const pthread_condattr_t *);
int (*ptr___pthread_cond_signal) (pthread_cond_t *);
int (*ptr___pthread_cond_wait) (pthread_cond_t *, pthread_mutex_t *);
int (*ptr___pthread_cond_timedwait) (pthread_cond_t *, pthread_mutex_t *,
const struct timespec *);
int (*ptr___pthread_cond_broadcast_2_0) (pthread_cond_2_0_t *);
int (*ptr___pthread_cond_destroy_2_0) (pthread_cond_2_0_t *);
int (*ptr___pthread_cond_init_2_0) (pthread_cond_2_0_t *,
const pthread_condattr_t *);
int (*ptr___pthread_cond_signal_2_0) (pthread_cond_2_0_t *);
int (*ptr___pthread_cond_wait_2_0) (pthread_cond_2_0_t *, pthread_mutex_t *);
int (*ptr___pthread_cond_timedwait_2_0) (pthread_cond_2_0_t *,
pthread_mutex_t *,
const struct timespec *);
int (*ptr_pthread_equal) (pthread_t, pthread_t);
void (*ptr___pthread_exit) (void *) __attribute__ ((__noreturn__));
int (*ptr_pthread_getschedparam) (pthread_t, int *, struct sched_param *);
int (*ptr_pthread_setschedparam) (pthread_t, int,
const struct sched_param *);
int (*ptr_pthread_mutex_destroy) (pthread_mutex_t *);
int (*ptr_pthread_mutex_init) (pthread_mutex_t *,
const pthread_mutexattr_t *);
int (*ptr_pthread_mutex_lock) (pthread_mutex_t *);
int (*ptr_pthread_mutex_unlock) (pthread_mutex_t *);
int (*ptr___pthread_setcancelstate) (int, int *);
int (*ptr_pthread_setcanceltype) (int, int *);
void (*ptr___pthread_cleanup_upto) (__jmp_buf, char *);
int (*ptr___pthread_once) (pthread_once_t *, void (*) (void));
int (*ptr___pthread_rwlock_rdlock) (pthread_rwlock_t *);
int (*ptr___pthread_rwlock_wrlock) (pthread_rwlock_t *);
int (*ptr___pthread_rwlock_unlock) (pthread_rwlock_t *);
int (*ptr___pthread_key_create) (pthread_key_t *, void (*) (void *));
void *(*ptr___pthread_getspecific) (pthread_key_t);
int (*ptr___pthread_setspecific) (pthread_key_t, const void *);
void (*ptr__pthread_cleanup_push_defer) (struct _pthread_cleanup_buffer *,
void (*) (void *), void *);
void (*ptr__pthread_cleanup_pop_restore) (struct _pthread_cleanup_buffer *,
int);
#define HAVE_PTR_NTHREADS
unsigned int *ptr_nthreads;
void (*ptr___pthread_unwind) (__pthread_unwind_buf_t *)
__attribute ((noreturn)) __cleanup_fct_attribute;
void (*ptr__nptl_deallocate_tsd) (void);
int (*ptr__nptl_setxid) (struct xid_command *);
void (*ptr_set_robust) (struct pthread *);
};
/* Variable in libc.so. */
extern struct pthread_functions __libc_pthread_functions attribute_hidden;
extern int __libc_pthread_functions_init attribute_hidden;
#ifdef PTR_DEMANGLE
# define PTHFCT_CALL(fct, params) \
({ __typeof (__libc_pthread_functions.fct) __p; \
__p = __libc_pthread_functions.fct; \
PTR_DEMANGLE (__p); \
__p params; })
#else
# define PTHFCT_CALL(fct, params) \
__libc_pthread_functions.fct params
#endif
#endif /* pthread-functions.h */