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* cygthread.cc (cygthread::stub): Revert previous change and again subsume

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cygthread::stub2.  Just return from function now since ExitThread is guaranteed
by automatic _threadinfo wrapper.  Define as per ThreadProc convention.
(cygthread::stub2): Remove.
(cygthread::simplestub): Perform similar operations to cygthread::stub.
(cygthread::simplestub2): Remove.
* cygthread.h (cygthread::stub): Declare as per ThreadProc convention.
(cygthread::stub2): Remove declaration.
(cygthread::simplestub): Declare as per ThreadProc convention.
(cygthread::simplestub2): Remove declaration.
* cygtls.h (_threadinfo::call): Define first argument as per ThreadProc
convention.
(_threadinfo::call2): Ditto.
(_tlsbase): Define as char * pointer.
(_tlstop): New definition.
(_main_tls): Define here.
* dcrt0.cc (alloc_stack): Revert previous change which called init_thread since
information would be overwritten by fork later anyway.
(dll_crt0_1): Use _tlsbase and _tlstop for setting stack bottom, top.
* exceptions.cc: Move _main_tls declaration to cygtls.h.
(_threadinfo::call): Define first argument as per ThreadProc convention.
(_threadinfo::call2): Call ExitThread with thread function return value.
(_threadinfo::init_thread): Don't initialize cygtls to zero if input arg is
NULL.
* fork.cc (fork_child): Reset _main_tls here.  Reinitialize parts of _my_tls
after copying data from parent.
* init.cc (threadfunc_fe): New function.  Front-end for all threads created in
cygwin processes.
(munge_threadfunc): New function.
(dll_entry): Call munge_threadfunc to force the call of a thread wrapper.
* thread.cc (pthread::thread_init_wrapper): Perform similar operations to
cygthread::stub.
(pthread::thread_init_wrapper2): Remove.
* thread.h (pthread::thread_init_wrapper): Declare as per ThreadProc
convention.
(pthread::thread_init_wrapper2): Remove declaration.
* window.cc (Winmain): Just return from function now since ExitThread is
guaranteed by automatic _threadinfo wrapper.
This commit is contained in:
Christopher Faylor 2003-12-14 07:09:22 +00:00
parent f082663050
commit c350feda20
11 changed files with 108 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,49 @@
2003-12-14 Christopher Faylor <cgf@redhat.com>
* cygthread.cc (cygthread::stub): Revert previous change and again
subsume cygthread::stub2. Just return from function now since
ExitThread is guaranteed by automatic _threadinfo wrapper. Define as
per ThreadProc convention.
(cygthread::stub2): Remove.
(cygthread::simplestub): Perform similar operations to cygthread::stub.
(cygthread::simplestub2): Remove.
* cygthread.h (cygthread::stub): Declare as per ThreadProc convention.
(cygthread::stub2): Remove declaration.
(cygthread::simplestub): Declare as per ThreadProc convention.
(cygthread::simplestub2): Remove declaration.
* cygtls.h (_threadinfo::call): Define first argument as per ThreadProc
convention.
(_threadinfo::call2): Ditto.
(_tlsbase): Define as char * pointer.
(_tlstop): New definition.
(_main_tls): Define here.
* dcrt0.cc (alloc_stack): Revert previous change which called
init_thread since information would be overwritten by fork later
anyway.
(dll_crt0_1): Use _tlsbase and _tlstop for setting stack bottom, top.
* exceptions.cc: Move _main_tls declaration to cygtls.h.
(_threadinfo::call): Define first argument as per ThreadProc
convention.
(_threadinfo::call2): Call ExitThread with thread function return
value.
(_threadinfo::init_thread): Don't initialize cygtls to zero if input
arg is NULL.
* fork.cc (fork_child): Reset _main_tls here. Reinitialize parts of
_my_tls after copying data from parent.
* init.cc (threadfunc_fe): New function. Front-end for all threads
created in cygwin processes.
(munge_threadfunc): New function.
(dll_entry): Call munge_threadfunc to force the call of a thread
wrapper.
* thread.cc (pthread::thread_init_wrapper): Perform similar operations
to cygthread::stub.
(pthread::thread_init_wrapper2): Remove.
* thread.h (pthread::thread_init_wrapper): Declare as per ThreadProc
convention.
(pthread::thread_init_wrapper2): Remove declaration.
* window.cc (Winmain): Just return from function now since ExitThread
is guaranteed by automatic _threadinfo wrapper.
2003-12-12 Christopher Faylor <cgf@redhat.com>
* dtable.cc (dtable::delete_archetype): Add debugging.

18
winsup/cygwin/cygthread.cc
View File

@ -31,13 +31,6 @@ bool NO_COPY cygthread::exiting;
to execute. */
DWORD WINAPI
cygthread::stub (VOID *arg)
{
_threadinfo::call (stub2, arg);
return 0;
}
void
cygthread::stub2 (void *arg, void *)
{
exception_list except_entry;
/* Initialize this thread's ability to respond to things like
@ -71,7 +64,7 @@ cygthread::stub2 (void *arg, void *)
else
{
if (!info->func || exiting)
ExitThread (0);
return 0;
/* Cygwin threads should not call ExitThread directly */
info->func (info->arg == cygself ? info : info->arg);
@ -98,13 +91,6 @@ cygthread::stub2 (void *arg, void *)
and then exits the thread. */
DWORD WINAPI
cygthread::simplestub (VOID *arg)
{
_threadinfo::call (simplestub2, arg);
return 0;
}
void
cygthread::simplestub2 (void *arg, void *)
{
exception_list except_entry;
/* Initialize this thread's ability to respond to things like
@ -116,7 +102,7 @@ cygthread::simplestub2 (void *arg, void *)
info->stack_ptr = &arg;
info->ev = info->h;
info->func (info->arg == cygself ? info : info->arg);
ExitThread (0);
return 0;
}
/* Start things going. Called from dll_crt0_1. */

2
winsup/cygwin/cygthread.h
View File

@ -19,12 +19,12 @@ class cygthread
VOID *arg;
bool is_freerange;
static bool exiting;
static DWORD WINAPI stub (VOID *);
static void stub2 (void *, void *);
static DWORD WINAPI simplestub (VOID *);
static void simplestub2 (void *, void *);
void terminate_thread ();
public:
static DWORD WINAPI stub (VOID *);
static DWORD main_thread_id;
static const char * name (DWORD = 0);
cygthread (LPTHREAD_START_ROUTINE, LPVOID, const char *);

10
winsup/cygwin/cygtls.h
View File

@ -44,8 +44,8 @@ struct _threadinfo
static CRITICAL_SECTION protect_linked_list;
static void init ();
void init_thread (void *);
static void call (void (*) (void *, void *), void *);
void call2 (void (*) (void *, void *), void *, void *);
static void call (DWORD (*) (void *, void *), void *);
void call2 (DWORD (*) (void *, void *), void *, void *);
static struct _threadinfo *find_tls (int sig);
void remove ();
void push (__stack_t, bool = false);
@ -62,8 +62,10 @@ struct _threadinfo
};
#pragma pack(pop)
extern _threadinfo *_tlsbase __asm__ ("%fs:4");
#define _my_tls (_tlsbase[-1])
extern char *_tlsbase __asm__ ("%fs:4");
extern char *_tlstop __asm__ ("%fs:8");
#define _my_tls (((_threadinfo *) _tlsbase)[-1])
extern _threadinfo *_main_tls;
#define CYGTLS_PADSIZE (sizeof (_threadinfo) + 64)
#endif /*_CYGTLS_H*/

10
winsup/cygwin/dcrt0.cc
View File

@ -520,11 +520,7 @@ alloc_stack (child_info_fork *ci)
if (sm.AllocationBase == ci->stacktop)
ci->stacksize = 0;
else
{
alloc_stack_hard_way (ci, b + sizeof (b) - 1);
_main_tls = &_my_tls;
_main_tls->init_thread (NULL);
}
alloc_stack_hard_way (ci, b + sizeof (b) - 1);
return;
}
@ -665,8 +661,8 @@ dll_crt0_1 ()
this step. */
if (fork_info->stacksize)
{
asm ("movl %0,%%fs:4" : : "r" (fork_info->stackbottom));
asm ("movl %0,%%fs:8" : : "r" (fork_info->stacktop));
_tlsbase = (char *) fork_info->stackbottom;
_tlstop = (char *) fork_info->stacktop;
}
longjmp (fork_info->jmp, fork_info->cygpid);

16
winsup/cygwin/exceptions.cc
View File

@ -38,7 +38,6 @@ extern void sigdelayed ();
_threadinfo NO_COPY dummy_thread;
_threadinfo NO_COPY *_last_thread = &dummy_thread;
extern _threadinfo *_main_tls;
CRITICAL_SECTION NO_COPY _threadinfo::protect_linked_list;
@ -150,17 +149,17 @@ _threadinfo::reset_exception ()
}
void
_threadinfo::call (void (*func) (void *, void *), void *arg)
_threadinfo::call (DWORD (*func) (void *, void *), void *arg)
{
char buf[CYGTLS_PADSIZE];
_my_tls.call2 (func, arg, buf);
}
void
_threadinfo::call2 (void (*func) (void *, void *), void *arg, void *buf)
_threadinfo::call2 (DWORD (*func) (void *, void *), void *arg, void *buf)
{
init_thread (buf);
func (arg, buf);
ExitThread (func (arg, buf));
}
void
@ -170,10 +169,13 @@ _threadinfo::init ()
}
void
_threadinfo::init_thread (void *)
_threadinfo::init_thread (void *x)
{
memset (this, 0, sizeof (*this));
stackptr = stack;
if (x)
{
memset (this, 0, sizeof (*this));
stackptr = stack;
}
EnterCriticalSection (&protect_linked_list);
prev = _last_thread;

4
winsup/cygwin/fork.cc
View File

@ -262,8 +262,8 @@ fork_child (HANDLE& hParent, dll *&first_dll, bool& load_dlls)
Exit with a status code of 0. */
if (fork_info->stacksize)
{
((DWORD *)fork_info->stackbottom)[-17] = (DWORD)do_exit;
((DWORD *)fork_info->stackbottom)[-15] = (DWORD)0;
_main_tls = &_my_tls;
_my_tls.init_thread (NULL);
}
set_file_api_mode (current_codepage);

35
winsup/cygwin/init.cc
View File

@ -12,12 +12,41 @@ details. */
#include <stdlib.h>
#include "thread.h"
#include "perprocess.h"
#include "cygthread.h"
#include "cygtls.h"
int NO_COPY dynamically_loaded;
extern "C" int
WINAPI dll_entry (HANDLE h, DWORD reason, void *static_load)
static void WINAPI
threadfunc_fe (VOID *arg)
{
_threadinfo::call ((DWORD (*) (void *, void *)) (((char **) _tlsbase)[-1]), arg);
}
static void
munge_threadfunc (HANDLE cygwin_hmodule)
{
char **ebp = (char **) __builtin_frame_address (0);
static unsigned threadfunc_ix;
if (!threadfunc_ix)
{
for (char **peb = ebp; peb < (char **) _tlsbase; peb++)
if (*peb == (char *) cygthread::stub)
{
threadfunc_ix = peb - ebp;
goto foundit;
}
return;
}
foundit:
char *threadfunc = ebp[threadfunc_ix];
ebp[threadfunc_ix] = (char *) threadfunc_fe;
((char **) _tlsbase)[-1] = threadfunc;
}
extern "C" int WINAPI
dll_entry (HANDLE h, DWORD reason, void *static_load)
{
switch (reason)
{
@ -28,9 +57,9 @@ WINAPI dll_entry (HANDLE h, DWORD reason, void *static_load)
case DLL_PROCESS_DETACH:
break;
case DLL_THREAD_ATTACH:
_my_tls.stackptr = _my_tls.stack;
if (MT_INTERFACE->reent_key.set (&MT_INTERFACE->reents))
api_fatal ("thread initialization failed");
munge_threadfunc (h);
break;
}
return 1;

16
winsup/cygwin/thread.cc
View File

@ -338,8 +338,8 @@ pthread::create (void *(*func) (void *), pthread_attr *newattr,
arg = threadarg;
win32_obj_id = ::CreateThread (&sec_none_nih, attr.stacksize,
(LPTHREAD_START_ROUTINE) thread_init_wrapper,
this, CREATE_SUSPENDED, &thread_id);
thread_init_wrapper, this, CREATE_SUSPENDED,
&thread_id);
if (!win32_obj_id)
{
@ -1887,8 +1887,8 @@ __reent_t::init_clib (struct _reent& var)
_clib = &var;
};
void
pthread::thread_init_wrapper2 (void *arg, void *)
DWORD WINAPI
pthread::thread_init_wrapper (void *arg)
{
pthread *thread = (pthread *) arg;
_my_tls.tid = thread;
@ -1928,14 +1928,8 @@ pthread::thread_init_wrapper2 (void *arg, void *)
void *ret = thread->function (thread->arg);
thread->exit (ret);
}
/* Pthreads */
void
pthread::thread_init_wrapper (void *arg)
{
// calls thread_init_wrapper2. Never returns.
_threadinfo::call (thread_init_wrapper2, arg);
return 0; // just for show. Never returns.
}
bool

3
winsup/cygwin/thread.h
View File

@ -502,8 +502,7 @@ public:
virtual void pop_cleanup_handler (int const execute);
static pthread* self ();
static void thread_init_wrapper (void *);
static void thread_init_wrapper2 (void *, void *);
static DWORD WINAPI thread_init_wrapper (void *);
virtual unsigned long getsequence_np();

2
winsup/cygwin/window.cc
View File

@ -120,7 +120,7 @@ Winmain (VOID *)
while (GetMessage (&msg, ourhwnd, 0, 0) == TRUE)
DispatchMessage (&msg);
ExitThread (0);
return 0;
}
HWND __stdcall