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import gc6.1alpha5

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This commit is contained in:
Fumitoshi UKAI
2002-07-10 14:21:11 +00:00
parent adfa59bd5f
commit bb118b7356
72 changed files with 18916 additions and 8113 deletions
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390
gc/win32_threads.c
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@@ -1,7 +1,25 @@
#if defined(GC_WIN32_THREADS)
#if defined(GC_WIN32_THREADS)
#include "private/gc_priv.h"
#ifdef CYGWIN32
# include <errno.h>
/* Cygwin-specific forward decls */
# undef pthread_create
# undef pthread_sigmask
# undef pthread_join
# undef dlopen
# define DEBUG_CYGWIN_THREADS 0
GC_bool GC_thr_initialized = FALSE;
void * GC_start_routine(void * arg);
void GC_thread_exit_proc(void *arg);
#endif
#if 0
#define STRICT
#include <windows.h>
@@ -18,6 +36,12 @@ struct thread_entry {
/* !in_use ==> stack == 0 */
CONTEXT context;
GC_bool suspended;
# ifdef CYGWIN32
void *status; /* hold exit value until join in case it's a pointer */
pthread_t pthread_id;
# endif
};
volatile GC_bool GC_please_stop = FALSE;
@@ -29,6 +53,12 @@ void GC_push_thread_structures GC_PROTO((void))
/* Unlike the other threads implementations, the thread table here */
/* contains no pointers to the collectable heap. Thus we have */
/* no private structures we need to preserve. */
# ifdef CYGWIN32
{ int i; /* pthreads may keep a pointer in the thread exit value */
for (i = 0; i < MAX_THREADS; i++)
if (thread_table[i].in_use) GC_push_all((ptr_t)&(thread_table[i].status),(ptr_t)(&(thread_table[i].status)+1));
}
#endif
}
void GC_stop_world()
@@ -36,6 +66,10 @@ void GC_stop_world()
DWORD thread_id = GetCurrentThreadId();
int i;
#ifdef CYGWIN32
if (!GC_thr_initialized) ABORT("GC_stop_world() called before GC_thr_init()");
#endif
GC_please_stop = TRUE;
for (i = 0; i < MAX_THREADS; i++)
if (thread_table[i].stack != 0
@@ -53,10 +87,13 @@ void GC_stop_world()
DWORD exitCode;
if (GetExitCodeThread(thread_table[i].handle,&exitCode) &&
exitCode != STILL_ACTIVE) {
thread_table[i].stack = 0;
thread_table[i].stack = 0; /* prevent stack from being pushed */
# ifndef CYGWIN32
/* this breaks pthread_join on Cygwin, which is guaranteed to only see user pthreads */
thread_table[i].in_use = FALSE;
CloseHandle(thread_table[i].handle);
BZERO((void *)(&thread_table[i].context), sizeof(CONTEXT));
#endif
continue;
}
if (SuspendThread(thread_table[i].handle) == (DWORD)-1)
@@ -134,9 +171,6 @@ void GC_push_all_stacks()
(LPCONTEXT)&thread_table[i].context))
ABORT("GetThreadContext failed");
# ifdef I386
if (thread_table[i].context.Esp >= (DWORD)thread_table[i].stack
|| thread_table[i].context.Esp < (DWORD)bottom)
ABORT("Thread stack pointer out of range");
GC_push_one ((word) thread_table[i].context.Edi);
GC_push_one ((word) thread_table[i].context.Esi);
GC_push_one ((word) thread_table[i].context.Ebp);
@@ -144,8 +178,15 @@ void GC_push_all_stacks()
GC_push_one ((word) thread_table[i].context.Edx);
GC_push_one ((word) thread_table[i].context.Ecx);
GC_push_one ((word) thread_table[i].context.Eax);
GC_push_all_stack((char *) thread_table[i].context.Esp,
thread_table[i].stack);
if (thread_table[i].context.Esp >= (DWORD)thread_table[i].stack
|| thread_table[i].context.Esp < (DWORD)bottom) {
WARN("Thread stack pointer 0x%lx out of range, pushing everything",
thread_table[i].context.Esp);
GC_push_all_stack((char *) bottom, thread_table[i].stack);
} else {
GC_push_all_stack((char *) thread_table[i].context.Esp,
thread_table[i].stack);
}
# else
# ifdef ARM32
if (thread_table[i].context.Sp >= (DWORD)thread_table[i].stack
@@ -331,8 +372,18 @@ void GC_get_next_stack(char *start, char **lo, char **hi)
if (*lo < start) *lo = start;
}
#if !defined(MSWINCE) && !(defined(__MINGW32__) && !defined(_DLL))
# ifdef MSWINCE
HANDLE WINAPI GC_CreateThread(
LPSECURITY_ATTRIBUTES lpThreadAttributes,
DWORD dwStackSize, LPTHREAD_START_ROUTINE lpStartAddress,
LPVOID lpParameter, DWORD dwCreationFlags, LPDWORD lpThreadId )
{
return CreateThread(lpThreadAttributes, dwStackSize, lpStartAddress,
lpParameter, dwCreationFlags, lpThreadId);
}
#else /* !defined(MSWINCE) && !(defined(__MINGW32__) && !defined(_DLL)) */
typedef struct {
HANDLE child_ready_h, parent_ready_h;
@@ -437,19 +488,28 @@ static DWORD WINAPI thread_start(LPVOID arg)
/* Clear the thread entry even if we exit with an exception. */
/* This is probably pointless, since an uncaught exception is */
/* supposed to result in the process being killed. */
#ifndef __GNUC__
__try {
#endif /* __GNUC__ */
ret = args.start (args.param);
#ifndef __GNUC__
} __finally {
#endif /* __GNUC__ */
LOCK();
args.entry->stack = 0;
args.entry->in_use = FALSE;
/* cast away volatile qualifier */
BZERO((void *) &args.entry->context, sizeof(CONTEXT));
UNLOCK();
#ifndef __GNUC__
}
#endif /* __GNUC__ */
return ret;
}
#endif /* !defined(MSWINCE) && !(defined(__MINGW32__) && !defined(_DLL)) */
#ifdef MSWINCE
typedef struct {
HINSTANCE hInstance;
@@ -504,6 +564,249 @@ DWORD WINAPI main_thread_start(LPVOID arg)
LONG WINAPI GC_write_fault_handler(struct _EXCEPTION_POINTERS *exc_info);
/* threadAttach/threadDetach routines used by both CYGWIN and DLL implementation,
since both recieve explicit notification on thread creation/destruction
*/
void threadAttach() {
int i;
/* It appears to be unsafe to acquire a lock here, since this */
/* code is apparently not preeemptible on some systems. */
/* (This is based on complaints, not on Microsoft's official */
/* documentation, which says this should perform "only simple */
/* inititalization tasks".) */
/* Hence we make do with nonblocking synchronization. */
/* The following should be a noop according to the win32 */
/* documentation. There is empirical evidence that it */
/* isn't. - HB */
# if defined(MPROTECT_VDB)
if (GC_incremental) SetUnhandledExceptionFilter(GC_write_fault_handler);
# endif
/* cast away volatile qualifier */
for (i = 0; InterlockedExchange((LONG*)&thread_table[i].in_use,1) != 0; i++) {
/* Compare-and-swap would make this cleaner, but that's not */
/* supported before Windows 98 and NT 4.0. In Windows 2000, */
/* InterlockedExchange is supposed to be replaced by */
/* InterlockedExchangePointer, but that's not really what I */
/* want here. */
if (i == MAX_THREADS - 1)
ABORT("too many threads");
}
thread_table[i].id = GetCurrentThreadId();
# ifdef CYGWIN32
thread_table[i].pthread_id = pthread_self();
# endif
if (!DuplicateHandle(GetCurrentProcess(),
GetCurrentThread(),
GetCurrentProcess(),
(HANDLE*)&thread_table[i].handle,
0,
0,
DUPLICATE_SAME_ACCESS)) {
DWORD last_error = GetLastError();
GC_printf1("Last error code: %lx\n", last_error);
ABORT("DuplicateHandle failed");
}
thread_table[i].stack = GC_get_stack_base();
if (thread_table[i].stack == NULL)
ABORT("Failed to find stack base in threadAttach");
/* If this thread is being created while we are trying to stop */
/* the world, wait here. Hopefully this can't happen on any */
/* systems that don't allow us to block here. */
while (GC_please_stop) Sleep(20);
}
void threadDetach(DWORD thread_id) {
int i;
LOCK();
for (i = 0;
i < MAX_THREADS &&
!thread_table[i].in_use || thread_table[i].id != thread_id;
i++) {}
if (i >= MAX_THREADS ) {
WARN("thread %ld not found on detach", (GC_word)thread_id);
}
else {
thread_table[i].stack = 0;
thread_table[i].in_use = FALSE;
CloseHandle(thread_table[i].handle);
/* cast away volatile qualifier */
BZERO((void *)&thread_table[i].context, sizeof(CONTEXT));
}
UNLOCK();
}
#ifdef CYGWIN32
/* Called by GC_init() - we hold the allocation lock. */
void GC_thr_init() {
if (GC_thr_initialized) return;
GC_thr_initialized = TRUE;
#if 0
/* this might already be handled in GC_init... */
InitializeCriticalSection(&GC_allocate_ml);
#endif
/* Add the initial thread, so we can stop it. */
threadAttach();
}
struct start_info {
void *(*start_routine)(void *);
void *arg;
};
int GC_pthread_join(pthread_t pthread_id, void **retval) {
int result;
int i;
# if DEBUG_CYGWIN_THREADS
GC_printf3("thread 0x%x(0x%x) is joining thread 0x%x.\n",(int)pthread_self(),
GetCurrentThreadId(), (int)pthread_id);
# endif
/* Can't do any table lookups here, because thread being joined
might not have registered itself yet */
result = pthread_join(pthread_id, retval);
LOCK();
for (i = 0; !thread_table[i].in_use || thread_table[i].pthread_id != pthread_id;
i++) {
if (i == MAX_THREADS - 1) {
GC_printf1("Failed to find thread 0x%x in pthread_join()\n", pthread_id);
ABORT("thread not found on detach");
}
}
UNLOCK();
threadDetach(thread_table[i].id);
# if DEBUG_CYGWIN_THREADS
GC_printf3("thread 0x%x(0x%x) completed join with thread 0x%x.\n",
(int)pthread_self(), GetCurrentThreadId(), (int)pthread_id);
# endif
return result;
}
/* Cygwin-pthreads calls CreateThread internally, but it's not
* easily interceptible by us..
* so intercept pthread_create instead
*/
int
GC_pthread_create(pthread_t *new_thread,
const pthread_attr_t *attr,
void *(*start_routine)(void *), void *arg) {
int result;
struct start_info * si;
if (!GC_is_initialized) GC_init();
/* make sure GC is initialized (i.e. main thread is attached) */
/* This is otherwise saved only in an area mmapped by the thread */
/* library, which isn't visible to the collector. */
si = GC_malloc_uncollectable(sizeof(struct start_info));
if (0 == si) return(EAGAIN);
si -> start_routine = start_routine;
si -> arg = arg;
# if DEBUG_CYGWIN_THREADS
GC_printf2("About to create a thread from 0x%x(0x%x)\n",(int)pthread_self(),
GetCurrentThreadId);
# endif
result = pthread_create(new_thread, attr, GC_start_routine, si);
if (result) { /* failure */
GC_free(si);
}
return(result);
}
void * GC_start_routine(void * arg)
{
struct start_info * si = arg;
void * result;
void *(*start)(void *);
void *start_arg;
pthread_t pthread_id;
int i;
# if DEBUG_CYGWIN_THREADS
GC_printf2("thread 0x%x(0x%x) starting...\n",(int)pthread_self(),
GetCurrentThreadId());
# endif
/* If a GC occurs before the thread is registered, that GC will */
/* ignore this thread. That's fine, since it will block trying to */
/* acquire the allocation lock, and won't yet hold interesting */
/* pointers. */
LOCK();
/* We register the thread here instead of in the parent, so that */
/* we don't need to hold the allocation lock during pthread_create. */
threadAttach();
UNLOCK();
start = si -> start_routine;
start_arg = si -> arg;
pthread_id = pthread_self();
GC_free(si); /* was allocated uncollectable */
pthread_cleanup_push(GC_thread_exit_proc, pthread_id);
result = (*start)(start_arg);
pthread_cleanup_pop(0);
# if DEBUG_CYGWIN_THREADS
GC_printf2("thread 0x%x(0x%x) returned from start routine.\n",
(int)pthread_self(),GetCurrentThreadId());
# endif
LOCK();
for (i = 0; thread_table[i].pthread_id != pthread_id; i++) {
if (i == MAX_THREADS - 1)
ABORT("thread not found on exit");
}
thread_table[i].status = result;
UNLOCK();
return(result);
}
void GC_thread_exit_proc(void *arg)
{
pthread_t pthread_id = (pthread_t)arg;
int i;
# if DEBUG_CYGWIN_THREADS
GC_printf2("thread 0x%x(0x%x) called pthread_exit().\n",(int)pthread_self(),GetCurrentThreadId());
# endif
LOCK();
for (i = 0; thread_table[i].pthread_id != pthread_id; i++) {
if (i == MAX_THREADS - 1)
ABORT("thread not found on exit");
}
UNLOCK();
#if 0
/* TODO: we need a way to get the exit value after a pthread_exit so we can stash it safely away */
thread_table[i].status = ???
#endif
}
/* nothing required here... */
int GC_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset) {
return pthread_sigmask(how, set, oset);
}
int GC_pthread_detach(pthread_t thread) {
return pthread_detach(thread);
}
#else
/*
* This isn't generally safe, since DllMain is not premptible.
* If another thread holds the lock while this runs we're in trouble.
@@ -517,75 +820,13 @@ BOOL WINAPI DllMain(HINSTANCE inst, ULONG reason, LPVOID reserved)
GC_init(); /* Force initialization before thread attach. */
/* fall through */
case DLL_THREAD_ATTACH:
{
int i;
/* It appears to be unsafe to acquire a lock here, since this */
/* code is apparently not preeemptible on some systems. */
/* (This is based on complaints, not on Microsoft's official */
/* documentation, which says this should perform "only simple */
/* inititalization tasks".) */
/* Hence we make do with nonblocking synchronization. */
/* The following should be a noop according to the win32 */
/* documentation. There is empirical evidence that it */
/* isn't. - HB */
# ifdef MPROTECT_VDB
if (GC_incremental) SetUnhandledExceptionFilter(GC_write_fault_handler);
# endif
for (i = 0;
/* cast away volatile qualifier */
InterlockedExchange((LPLONG) &thread_table[i].in_use, 1) != 0;
i++) {
/* Compare-and-swap would make this cleaner, but that's not */
/* supported before Windows 98 and NT 4.0. In Windows 2000, */
/* InterlockedExchange is supposed to be replaced by */
/* InterlockedExchangePointer, but that's not really what I */
/* want here. */
if (i == MAX_THREADS - 1)
ABORT("too many threads");
}
thread_table[i].id = GetCurrentThreadId();
if (!DuplicateHandle(GetCurrentProcess(),
GetCurrentThread(),
GetCurrentProcess(),
/* cast away volatile qualifier */
(HANDLE *) &thread_table[i].handle,
0,
0,
DUPLICATE_SAME_ACCESS)) {
DWORD last_error = GetLastError();
GC_printf1("Last error code: %lx\n", last_error);
ABORT("DuplicateHandle failed");
}
thread_table[i].stack = GC_get_stack_base();
/* If this thread is being created while we are trying to stop */
/* the world, wait here. Hopefully this can't happen on any */
/* systems that don't allow us to block here. */
while (GC_please_stop) Sleep(20);
}
threadAttach();
break;
case DLL_THREAD_DETACH:
{
int i;
DWORD thread_id = GetCurrentThreadId();
LOCK();
for (i = 0;
i < MAX_THREADS &&
(thread_table[i].stack == 0 || thread_table[i].id != thread_id);
i++) {}
if (i >= MAX_THREADS) {
WARN("thread %ld not found on detach", (GC_word)thread_id);
} else {
thread_table[i].stack = 0;
thread_table[i].in_use = FALSE;
CloseHandle(thread_table[i].handle);
/* cast away volatile qualifier */
BZERO((void *) &thread_table[i].context, sizeof(CONTEXT));
}
UNLOCK();
}
threadDetach(GetCurrentThreadId());
break;
case DLL_PROCESS_DETACH:
{
int i;
@@ -611,6 +852,7 @@ BOOL WINAPI DllMain(HINSTANCE inst, ULONG reason, LPVOID reserved)
}
return TRUE;
}
#endif /* CYGWIN32 */
# endif /* !MSWINCE */