472 lines
13 KiB
C
472 lines
13 KiB
C
/*
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* System-dependent scheduler support
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*
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* Copyright 1998 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <signal.h>
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#include <stdio.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_SYS_TIME_H
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# include <sys/time.h>
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#endif
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#ifdef HAVE_SYS_SYSCALL_H
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# include <sys/syscall.h>
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#endif
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#ifdef HAVE_SYS_LWP_H
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# include <sys/lwp.h>
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#endif
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#ifdef HAVE_UCONTEXT_H
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# include <ucontext.h>
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#endif
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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#ifdef HAVE_SCHED_H
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#include <sched.h>
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#endif
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#ifdef HAVE_NPTL
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#include <pthread.h>
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#endif
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#include "thread.h"
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#include "wine/server.h"
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#include "winbase.h"
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#include "wine/winbase16.h"
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#include "wine/exception.h"
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#include "wine/library.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(thread);
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struct thread_cleanup_info
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{
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void *stack_base;
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int stack_size;
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int status;
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};
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/* temporary stacks used on thread exit */
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#define TEMP_STACK_SIZE 1024
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#define NB_TEMP_STACKS 8
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static char temp_stacks[NB_TEMP_STACKS][TEMP_STACK_SIZE];
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static LONG next_temp_stack; /* next temp stack to use */
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/***********************************************************************
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* SYSDEPS_SetCurThread
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*
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* Make 'thread' the current thread.
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*/
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void SYSDEPS_SetCurThread( TEB *teb )
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{
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#if defined(__i386__)
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/* On the i386, the current thread is in the %fs register */
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LDT_ENTRY fs_entry;
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wine_ldt_set_base( &fs_entry, teb );
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wine_ldt_set_limit( &fs_entry, 0xfff );
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wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
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wine_ldt_init_fs( teb->teb_sel, &fs_entry );
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#elif defined(__powerpc__)
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/* On PowerPC, the current TEB is in the gpr13 register */
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__asm__ __volatile__("mr 2, %0" : : "r" (teb));
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#elif defined(HAVE__LWP_CREATE)
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/* On non-i386 Solaris, we use the LWP private pointer */
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_lwp_setprivate( teb );
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#endif
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}
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/***********************************************************************
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* call_on_thread_stack
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*
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* Call a function once we switched to the thread stack.
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*/
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static void call_on_thread_stack( void *func )
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{
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__TRY
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{
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void (*funcptr)(void) = func;
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funcptr();
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}
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__EXCEPT(UnhandledExceptionFilter)
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{
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TerminateThread( GetCurrentThread(), GetExceptionCode() );
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}
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__ENDTRY
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SYSDEPS_ExitThread(0); /* should never get here */
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}
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/***********************************************************************
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* get_temp_stack
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*
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* Get a temporary stack address to run the thread exit code on.
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*/
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inline static char *get_temp_stack(void)
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{
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unsigned int next = InterlockedExchangeAdd( &next_temp_stack, 1 );
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return temp_stacks[next % NB_TEMP_STACKS];
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}
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/***********************************************************************
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* cleanup_thread
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*
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* Cleanup the remains of a thread. Runs on a temporary stack.
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*/
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static void cleanup_thread( void *ptr )
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{
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/* copy the info structure since it is on the stack we will free */
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struct thread_cleanup_info info = *(struct thread_cleanup_info *)ptr;
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munmap( info.stack_base, info.stack_size );
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wine_ldt_free_fs( wine_get_fs() );
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#ifdef HAVE__LWP_CREATE
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_lwp_exit();
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#endif
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_exit( info.status );
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}
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/***********************************************************************
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* SYSDEPS_StartThread
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*
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* Startup routine for a new thread.
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*/
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static void SYSDEPS_StartThread( TEB *teb )
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{
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SYSDEPS_SetCurThread( teb );
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SIGNAL_Init();
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CLIENT_InitThread();
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__TRY
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{
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teb->startup();
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}
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__EXCEPT(UnhandledExceptionFilter)
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{
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TerminateThread( GetCurrentThread(), GetExceptionCode() );
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}
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__ENDTRY
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SYSDEPS_ExitThread(0); /* should never get here */
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}
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/***********************************************************************
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* SYSDEPS_SpawnThread
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*
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* Start running a new thread.
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* Return -1 on error, 0 if OK.
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*/
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int SYSDEPS_SpawnThread( TEB *teb )
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{
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#ifdef HAVE_NPTL
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pthread_t id;
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pthread_attr_t attr;
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pthread_attr_init( &attr );
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pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_DETACHED );
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pthread_attr_setstack( &attr, teb->stack_base, (char *)teb->stack_top - (char *)teb->stack_base );
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if (pthread_create( &id, &attr, (void * (*)(void *))SYSDEPS_StartThread, teb )) return -1;
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return 0;
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#elif defined(HAVE_CLONE)
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if (clone( (int (*)(void *))SYSDEPS_StartThread, teb->stack_top,
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CLONE_VM | CLONE_FS | CLONE_FILES | SIGCHLD, teb ) < 0)
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return -1;
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return 0;
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#elif defined(HAVE_RFORK)
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void **sp = (void **)teb->stack_top;
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*--sp = teb;
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*--sp = 0;
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*--sp = SYSDEPS_StartThread;
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__asm__ __volatile__(
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"pushl %2;\n\t" /* flags */
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"pushl $0;\n\t" /* 0 ? */
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"movl %1,%%eax;\n\t" /* SYS_rfork */
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".byte 0x9a; .long 0; .word 7;\n\t" /* lcall 7:0... FreeBSD syscall */
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"cmpl $0, %%edx;\n\t"
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"je 1f;\n\t"
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"movl %0,%%esp;\n\t" /* child -> new thread */
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"ret;\n"
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"1:\n\t" /* parent -> caller thread */
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"addl $8,%%esp" :
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: "r" (sp), "g" (SYS_rfork), "g" (RFPROC | RFMEM)
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: "eax", "edx");
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return 0;
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#elif defined(HAVE__LWP_CREATE)
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ucontext_t context;
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_lwp_makecontext( &context, (void(*)(void *))SYSDEPS_StartThread, teb,
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NULL, teb->stack_base, (char *)teb->stack_top - (char *)teb->stack_base );
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if ( _lwp_create( &context, 0, NULL ) )
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return -1;
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return 0;
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#endif
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FIXME("CreateThread: stub\n" );
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return -1;
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}
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/***********************************************************************
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* SYSDEPS_CallOnStack
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*/
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void DECLSPEC_NORETURN SYSDEPS_CallOnStack( void (*func)(LPVOID), LPVOID arg );
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#ifdef __i386__
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# ifdef __GNUC__
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__ASM_GLOBAL_FUNC( SYSDEPS_CallOnStack,
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"movl 4(%esp),%ecx\n\t" /* func */
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"movl 8(%esp),%edx\n\t" /* arg */
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".byte 0x64\n\tmovl 0x04,%esp\n\t" /* teb->stack_top */
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"pushl %edx\n\t"
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"xorl %ebp,%ebp\n\t"
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"call *%ecx\n\t"
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"int $3" /* we never return here */ );
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# elif defined(_MSC_VER)
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__declspec(naked) void SYSDEPS_CallOnStack( void (*func)(LPVOID), LPVOID arg )
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{
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__asm mov ecx, 4[esp];
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__asm mov edx, 8[esp];
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__asm mov fs:[0x04], esp;
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__asm push edx;
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__asm xor ebp, ebp;
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__asm call [ecx];
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__asm int 3;
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}
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# endif /* defined(__GNUC__) || defined(_MSC_VER) */
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#elif defined(__sparc__) && defined(__GNUC__)
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__ASM_GLOBAL_FUNC( SYSDEPS_CallOnStack,
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"mov %o0, %l0\n\t" /* store first argument */
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"call " __ASM_NAME("NtCurrentTeb") ", 0\n\t"
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"mov %o1, %l1\n\t" /* delay slot: store second argument */
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"ld [%o0+4], %sp\n\t" /* teb->stack_top */
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"call %l0, 0\n\t" /* call func */
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"mov %l1, %o0\n\t" /* delay slot: arg for func */
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"ta 0x01\n\t"); /* breakpoint - we never get here */
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#else /* !sparc, !i386 */
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void SYSDEPS_CallOnStack( void (*func)(LPVOID), LPVOID arg )
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{
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func( arg );
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while(1); /* avoid warning */
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}
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#endif /* !defined(__i386__) && !defined(__sparc__) */
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/***********************************************************************
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* SYSDEPS_SwitchToThreadStack
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*/
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void SYSDEPS_SwitchToThreadStack( void (*func)(void) )
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{
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SYSDEPS_CallOnStack( call_on_thread_stack, func );
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}
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/***********************************************************************
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* SYSDEPS_ExitThread
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*
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* Exit a running thread; must not return.
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*/
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void SYSDEPS_ExitThread( int status )
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{
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TEB *teb = NtCurrentTeb();
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struct thread_cleanup_info info;
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MEMORY_BASIC_INFORMATION meminfo;
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wine_ldt_free_entries( teb->stack_sel, 1 );
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VirtualQuery( teb->stack_top, &meminfo, sizeof(meminfo) );
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info.stack_base = meminfo.AllocationBase;
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info.stack_size = meminfo.RegionSize + ((char *)teb->stack_top - (char *)meminfo.AllocationBase);
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info.status = status;
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SIGNAL_Block();
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#ifdef HAVE_NPTL
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SYSDEPS_AbortThread( status );
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#else
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SIGNAL_Reset();
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VirtualFree( teb->stack_base, 0, MEM_RELEASE | MEM_SYSTEM );
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close( teb->wait_fd[0] );
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close( teb->wait_fd[1] );
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close( teb->reply_fd );
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close( teb->request_fd );
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teb->stack_low = get_temp_stack();
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teb->stack_top = (char *) teb->stack_low + TEMP_STACK_SIZE;
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SYSDEPS_CallOnStack( cleanup_thread, &info );
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#endif
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}
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/***********************************************************************
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* SYSDEPS_AbortThread
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*
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* Same as SYSDEPS_ExitThread, but must not do anything that requires a server call.
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*/
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void SYSDEPS_AbortThread( int status )
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{
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SIGNAL_Block();
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close( NtCurrentTeb()->wait_fd[0] );
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close( NtCurrentTeb()->wait_fd[1] );
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close( NtCurrentTeb()->reply_fd );
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close( NtCurrentTeb()->request_fd );
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#ifdef HAVE_NPTL
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pthread_exit( (void *)status );
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#endif
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SIGNAL_Reset();
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#ifdef HAVE__LWP_CREATE
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_lwp_exit();
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#endif
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for (;;) /* avoid warning */
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_exit( status );
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}
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/***********************************************************************
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* SYSDEPS_GetUnixTid
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*
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* Get the Unix tid of the current thread.
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*/
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int SYSDEPS_GetUnixTid(void)
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{
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#ifdef HAVE__LWP_SELF
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return _lwp_self();
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#elif defined(__linux__) && defined(__i386__)
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int ret;
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__asm__("int $0x80" : "=a" (ret) : "0" (224) /* SYS_gettid */);
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if (ret < 0) ret = -1;
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return ret;
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#else
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return -1;
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#endif
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}
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#ifndef HAVE_NPTL
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/* default errno before threading is initialized */
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static int *default_errno_location(void)
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{
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static int static_errno;
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return &static_errno;
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}
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/* default h_errno before threading is initialized */
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static int *default_h_errno_location(void)
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{
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static int static_h_errno;
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return &static_h_errno;
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}
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/* errno once threading is working */
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static int *thread_errno_location(void)
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{
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return &NtCurrentTeb()->thread_errno;
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}
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/* h_errno once threading is working */
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static int *thread_h_errno_location(void)
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{
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return &NtCurrentTeb()->thread_h_errno;
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}
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static int* (*errno_location_ptr)(void) = default_errno_location;
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static int* (*h_errno_location_ptr)(void) = default_h_errno_location;
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/***********************************************************************
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* __errno_location/__error/__errno/___errno/__thr_errno
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*
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* Get the per-thread errno location.
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*/
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int *__errno_location(void) { return errno_location_ptr(); } /* Linux */
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int *__error(void) { return errno_location_ptr(); } /* FreeBSD */
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int *__errno(void) { return errno_location_ptr(); } /* NetBSD */
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int *___errno(void) { return errno_location_ptr(); } /* Solaris */
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int *__thr_errno(void) { return errno_location_ptr(); } /* UnixWare */
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/***********************************************************************
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* __h_errno_location
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*
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* Get the per-thread h_errno location.
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*/
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int *__h_errno_location(void)
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{
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return h_errno_location_ptr();
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}
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#endif /* HAVE_NPTL */
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#if defined(__linux__) && defined(__i386__)
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static inline void writejump( const char *symbol, void *dest )
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{
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unsigned char *addr = wine_dlsym( RTLD_NEXT, symbol, NULL, 0 );
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if (!addr) return;
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/* write a relative jump at the function address */
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mprotect((void*)((unsigned int)addr & ~(getpagesize()-1)), 5, PROT_READ|PROT_EXEC|PROT_WRITE);
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addr[0] = 0xe9;
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*(int *)(addr+1) = (unsigned char *)dest - (addr + 5);
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mprotect((void*)((unsigned int)addr & ~(getpagesize()-1)), 5, PROT_READ|PROT_EXEC);
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}
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#endif
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/***********************************************************************
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* SYSDEPS_InitErrno
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*
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* Initialize errno handling.
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*/
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void SYSDEPS_InitErrno(void)
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{
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#ifndef HAVE_NPTL
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errno_location_ptr = thread_errno_location;
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h_errno_location_ptr = thread_h_errno_location;
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# if defined(__linux__) && defined(__i386__)
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writejump( "__errno_location", thread_errno_location );
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writejump( "__h_errno_location", thread_h_errno_location );
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# endif
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#endif /* HAVE_NPTL */
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}
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/**********************************************************************
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* NtCurrentTeb (NTDLL.@)
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*
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* This will crash and burn if called before threading is initialized
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*/
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#if defined(__i386__) && defined(__GNUC__)
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__ASM_GLOBAL_FUNC( NtCurrentTeb, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" );
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#elif defined(__i386__) && defined(_MSC_VER)
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/* Nothing needs to be done. MS C "magically" exports the inline version from winnt.h */
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#elif defined(HAVE__LWP_CREATE)
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/***********************************************************************
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* NtCurrentTeb (NTDLL.@)
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*/
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struct _TEB * WINAPI NtCurrentTeb(void)
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{
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extern void *_lwp_getprivate(void);
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return (struct _TEB *)_lwp_getprivate();
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}
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#elif defined(__powerpc__)
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__ASM_GLOBAL_FUNC( NtCurrentTeb, "\n\tmr 3,2\n\tblr" );
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#else
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# error NtCurrentTeb not defined for this architecture
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#endif /* __i386__ */
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