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/*
* Copyright (c) 1994 by Xerox Corporation. All rights reserved.
* Copyright (c) 1996 by Silicon Graphics. All rights reserved.
* Copyright (c) 1998 by Fergus Henderson. All rights reserved.
* Copyright (c) 2000-2010 by Hewlett-Packard Development Company.
* All rights reserved.
*
* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
*
* Permission is hereby granted to use or copy this program
* for any purpose, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is granted,
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*/
/* We want to make sure that GC_thread_exit_proc() is unconditionally */
/* invoked, even if the client is not compiled with -fexceptions, but */
/* the GC is. The workaround is to put GC_inner_start_routine() in its */
/* own file (pthread_start.c), and undefine __EXCEPTIONS in the GCC */
/* case at the top of the file. FIXME: it's still unclear whether this */
/* will actually cause the exit handler to be invoked last when */
/* thread_exit is called (and if -fexceptions is used). */
#if defined(__GNUC__) && defined(__linux__)
/* We undefine __EXCEPTIONS to avoid using GCC __cleanup__ attribute. */
/* The current NPTL implementation of pthread_cleanup_push uses */
/* __cleanup__ attribute when __EXCEPTIONS is defined (-fexceptions). */
/* The stack unwinding and cleanup with __cleanup__ attributes work */
/* correctly when everything is compiled with -fexceptions, but it is */
/* not the requirement for this library clients to use -fexceptions */
/* everywhere. With __EXCEPTIONS undefined, the cleanup routines are */
/* registered with __pthread_register_cancel thus should work anyway. */
# undef __EXCEPTIONS
#endif
#include "private/pthread_support.h"
#if defined(GC_PTHREADS) && !defined(GC_WIN32_THREADS)
#include <pthread.h>
#include <sched.h>
/* Invoked from GC_start_routine(). */
GC_INNER_PTHRSTART void * GC_CALLBACK GC_inner_start_routine(
struct GC_stack_base *sb, void *arg)
{
void * (*start)(void *);
void * start_arg;
void * result;
volatile GC_thread me =
GC_start_rtn_prepare_thread(&start, &start_arg, sb, arg);
# ifndef NACL
pthread_cleanup_push(GC_thread_exit_proc, me);
# endif
result = (*start)(start_arg);
# if defined(DEBUG_THREADS) && !defined(GC_PTHREAD_START_STANDALONE)
GC_log_printf("Finishing thread %p\n", (void *)pthread_self());
# endif
me -> status = result;
# ifndef NACL
pthread_cleanup_pop(1);
/* Cleanup acquires lock, ensuring that we can't exit while */
/* a collection that thinks we're alive is trying to stop us. */
# endif
return result;
}
#endif /* GC_PTHREADS */