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Sweden-Number/scheduler/sysdeps.c

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/*
* System-dependent scheduler support
*
* Copyright 1998 Alexandre Julliard
*
* This 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.
*
* This 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <signal.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_SYS_SYSCALL_H
# include <sys/syscall.h>
#endif
#ifdef HAVE_SYS_LWP_H
# include <sys/lwp.h>
#endif
#ifdef HAVE_UCONTEXT_H
# include <ucontext.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#ifdef HAVE_SCHED_H
#include <sched.h>
#endif
#include "thread.h"
#include "wine/server.h"
#include "winbase.h"
#include "wine/winbase16.h"
#include "wine/exception.h"
#include "wine/library.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(thread);
struct thread_cleanup_info
{
void *stack_base;
int stack_size;
int status;
};
/* temporary stacks used on thread exit */
#define TEMP_STACK_SIZE 1024
#define NB_TEMP_STACKS 8
static char temp_stacks[NB_TEMP_STACKS][TEMP_STACK_SIZE];
static LONG next_temp_stack; /* next temp stack to use */
/***********************************************************************
* SYSDEPS_SetCurThread
*
* Make 'thread' the current thread.
*/
void SYSDEPS_SetCurThread( TEB *teb )
{
#if defined(__i386__)
/* On the i386, the current thread is in the %fs register */
LDT_ENTRY fs_entry;
wine_ldt_set_base( &fs_entry, teb );
wine_ldt_set_limit( &fs_entry, 0xfff );
wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
wine_ldt_init_fs( teb->teb_sel, &fs_entry );
#elif defined(__powerpc__)
/* On PowerPC, the current TEB is in the gpr13 register */
__asm__ __volatile__("mr 2, %0" : : "r" (teb));
#elif defined(HAVE__LWP_CREATE)
/* On non-i386 Solaris, we use the LWP private pointer */
_lwp_setprivate( teb );
#endif
}
/***********************************************************************
* call_on_thread_stack
*
* Call a function once we switched to the thread stack.
*/
static void call_on_thread_stack( void *func )
{
__TRY
{
void (*funcptr)(void) = func;
funcptr();
}
__EXCEPT(UnhandledExceptionFilter)
{
TerminateThread( GetCurrentThread(), GetExceptionCode() );
}
__ENDTRY
SYSDEPS_ExitThread(0); /* should never get here */
}
/***********************************************************************
* get_temp_stack
*
* Get a temporary stack address to run the thread exit code on.
*/
inline static char *get_temp_stack(void)
{
unsigned int next = InterlockedExchangeAdd( &next_temp_stack, 1 );
return temp_stacks[next % NB_TEMP_STACKS];
}
/***********************************************************************
* cleanup_thread
*
* Cleanup the remains of a thread. Runs on a temporary stack.
*/
static void cleanup_thread( void *ptr )
{
/* copy the info structure since it is on the stack we will free */
struct thread_cleanup_info info = *(struct thread_cleanup_info *)ptr;
munmap( info.stack_base, info.stack_size );
wine_ldt_free_fs( wine_get_fs() );
#ifdef HAVE__LWP_CREATE
_lwp_exit();
#endif
_exit( info.status );
}
/***********************************************************************
* SYSDEPS_StartThread
*
* Startup routine for a new thread.
*/
static void SYSDEPS_StartThread( TEB *teb )
{
SYSDEPS_SetCurThread( teb );
SIGNAL_Init();
CLIENT_InitThread();
__TRY
{
teb->startup();
}
__EXCEPT(UnhandledExceptionFilter)
{
TerminateThread( GetCurrentThread(), GetExceptionCode() );
}
__ENDTRY
SYSDEPS_ExitThread(0); /* should never get here */
}
/***********************************************************************
* SYSDEPS_SpawnThread
*
* Start running a new thread.
* Return -1 on error, 0 if OK.
*/
int SYSDEPS_SpawnThread( TEB *teb )
{
#ifdef HAVE_CLONE
if (clone( (int (*)(void *))SYSDEPS_StartThread, teb->stack_top,
CLONE_VM | CLONE_FS | CLONE_FILES, teb ) < 0)
return -1;
return 0;
#elif defined(HAVE_RFORK)
void **sp = (void **)teb->stack_top;
*--sp = teb;
*--sp = 0;
*--sp = SYSDEPS_StartThread;
__asm__ __volatile__(
"pushl %2;\n\t" /* flags */
"pushl $0;\n\t" /* 0 ? */
"movl %1,%%eax;\n\t" /* SYS_rfork */
".byte 0x9a; .long 0; .word 7;\n\t" /* lcall 7:0... FreeBSD syscall */
"cmpl $0, %%edx;\n\t"
"je 1f;\n\t"
"movl %0,%%esp;\n\t" /* child -> new thread */
"ret;\n"
"1:\n\t" /* parent -> caller thread */
"addl $8,%%esp" :
: "r" (sp), "g" (SYS_rfork), "g" (RFPROC | RFMEM)
: "eax", "edx");
return 0;
#elif defined(HAVE__LWP_CREATE)
ucontext_t context;
_lwp_makecontext( &context, (void(*)(void *))SYSDEPS_StartThread, teb,
NULL, teb->stack_base, (char *)teb->stack_top - (char *)teb->stack_base );
if ( _lwp_create( &context, 0, NULL ) )
return -1;
return 0;
#endif
FIXME("CreateThread: stub\n" );
return -1;
}
/***********************************************************************
* SYSDEPS_CallOnStack
*/
void DECLSPEC_NORETURN SYSDEPS_CallOnStack( void (*func)(LPVOID), LPVOID arg );
#ifdef __i386__
# ifdef __GNUC__
__ASM_GLOBAL_FUNC( SYSDEPS_CallOnStack,
"movl 4(%esp),%ecx\n\t" /* func */
"movl 8(%esp),%edx\n\t" /* arg */
".byte 0x64\n\tmovl 0x04,%esp\n\t" /* teb->stack_top */
"pushl %edx\n\t"
"xorl %ebp,%ebp\n\t"
"call *%ecx\n\t"
"int $3" /* we never return here */ );
# elif defined(_MSC_VER)
__declspec(naked) void SYSDEPS_CallOnStack( void (*func)(LPVOID), LPVOID arg )
{
__asm mov ecx, 4[esp];
__asm mov edx, 8[esp];
__asm mov fs:[0x04], esp;
__asm push edx;
__asm xor ebp, ebp;
__asm call [ecx];
__asm int 3;
}
# endif /* defined(__GNUC__) || defined(_MSC_VER) */
#elif defined(__sparc__) && defined(__GNUC__)
__ASM_GLOBAL_FUNC( SYSDEPS_CallOnStack,
"mov %o0, %l0\n\t" /* store first argument */
"call " __ASM_NAME("NtCurrentTeb") ", 0\n\t"
"mov %o1, %l1\n\t" /* delay slot: store second argument */
"ld [%o0+4], %sp\n\t" /* teb->stack_top */
"call %l0, 0\n\t" /* call func */
"mov %l1, %o0\n\t" /* delay slot: arg for func */
"ta 0x01\n\t"); /* breakpoint - we never get here */
#else /* !sparc, !i386 */
void SYSDEPS_CallOnStack( void (*func)(LPVOID), LPVOID arg )
{
func( arg );
while(1); /* avoid warning */
}
#endif /* !defined(__i386__) && !defined(__sparc__) */
/***********************************************************************
* SYSDEPS_SwitchToThreadStack
*/
void SYSDEPS_SwitchToThreadStack( void (*func)(void) )
{
SYSDEPS_CallOnStack( call_on_thread_stack, func );
}
/***********************************************************************
* SYSDEPS_ExitThread
*
* Exit a running thread; must not return.
*/
void SYSDEPS_ExitThread( int status )
{
TEB *teb = NtCurrentTeb();
struct thread_cleanup_info info;
MEMORY_BASIC_INFORMATION meminfo;
wine_ldt_free_entries( teb->stack_sel, 1 );
VirtualQuery( teb->stack_top, &meminfo, sizeof(meminfo) );
info.stack_base = meminfo.AllocationBase;
info.stack_size = meminfo.RegionSize + ((char *)teb->stack_top - (char *)meminfo.AllocationBase);
info.status = status;
SIGNAL_Block();
SIGNAL_Reset();
VirtualFree( teb->stack_base, 0, MEM_RELEASE | MEM_SYSTEM );
close( teb->wait_fd[0] );
close( teb->wait_fd[1] );
close( teb->reply_fd );
close( teb->request_fd );
teb->stack_low = get_temp_stack();
teb->stack_top = (char *) teb->stack_low + TEMP_STACK_SIZE;
SYSDEPS_CallOnStack( cleanup_thread, &info );
}
/***********************************************************************
* SYSDEPS_AbortThread
*
* Same as SYSDEPS_ExitThread, but must not do anything that requires a server call.
*/
void SYSDEPS_AbortThread( int status )
{
SIGNAL_Block();
SIGNAL_Reset();
close( NtCurrentTeb()->wait_fd[0] );
close( NtCurrentTeb()->wait_fd[1] );
close( NtCurrentTeb()->reply_fd );
close( NtCurrentTeb()->request_fd );
#ifdef HAVE__LWP_CREATE
_lwp_exit();
#endif
for (;;) /* avoid warning */
_exit( status );
}
/* default errno before threading is initialized */
static int *default_errno_location(void)
{
static int errno;
return &errno;
}
/* default h_errno before threading is initialized */
static int *default_h_errno_location(void)
{
static int h_errno;
return &h_errno;
}
/* errno once threading is working */
static int *thread_errno_location(void)
{
return &NtCurrentTeb()->thread_errno;
}
/* h_errno once threading is working */
static int *thread_h_errno_location(void)
{
return &NtCurrentTeb()->thread_h_errno;
}
static int* (*errno_location_ptr)(void) = default_errno_location;
static int* (*h_errno_location_ptr)(void) = default_h_errno_location;
/***********************************************************************
* __errno_location/__error/___errno
*
* Get the per-thread errno location.
*/
#ifdef ERRNO_LOCATION
int *ERRNO_LOCATION(void)
{
return errno_location_ptr();
}
#endif /* ERRNO_LOCATION */
/***********************************************************************
* __h_errno_location
*
* Get the per-thread h_errno location.
*/
int *__h_errno_location(void)
{
return h_errno_location_ptr();
}
/***********************************************************************
* SYSDEPS_InitErrno
*
* Initialize errno handling.
*/
void SYSDEPS_InitErrno(void)
{
errno_location_ptr = thread_errno_location;
h_errno_location_ptr = thread_h_errno_location;
}
/**********************************************************************
* NtCurrentTeb (NTDLL.@)
*
* This will crash and burn if called before threading is initialized
*/
#if defined(__i386__) && defined(__GNUC__)
__ASM_GLOBAL_FUNC( NtCurrentTeb, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" );
#elif defined(__i386__) && defined(_MSC_VER)
/* Nothing needs to be done. MS C "magically" exports the inline version from winnt.h */
#elif defined(HAVE__LWP_CREATE)
/***********************************************************************
* NtCurrentTeb (NTDLL.@)
*/
struct _TEB * WINAPI NtCurrentTeb(void)
{
extern void *_lwp_getprivate(void);
return (struct _TEB *)_lwp_getprivate();
}
#elif defined(__powerpc__)
__ASM_GLOBAL_FUNC( NtCurrentTeb, "\n\tmr 3,2\n\tblr" );
#else
# error NtCurrentTeb not defined for this architecture
#endif /* __i386__ */
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