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* cygtls.h (_threadinfo::call): Remove regparm declaration to work around

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compiler bug.
* autoload.cc (TryEnterCriticalSection): Remove.
* dcrt0.cc (dll_crt0_0): Delete inappropriate setting of _my_tls.stackptr to
NULL since it has really bad consequences.  Make 'si' an automatic variable.
* cygtls.cc (_threadinfo::init_thread): Correct thinko which caused thread list
to be allocated every time.
* cygtls.h (CYGTLS_PADSIZE): Define as const int.
* sync.h: Make multiple inclusion safe.
(muto::next): Eliminate.
(muto::exiting_thread): New variable.
(muto::set_exiting_thread): New function.
(new_muto): Change to use different section for mutos since c++ give
inexplicable warning in some cases otherwise.
(new_muto1): Ditto.
* dcrt0.cc (do_exit): Call muto::set_exiting_thread here.
* sync.cc (muto_start): Eliminate.
(muto::acquire): Always give exiting thread a lock.  Never give thread a lock
if exiting.
(muto::release): Ditto for releasing.
* dtable.cc (dtable::init_lock): Unline function and define here.
* dtable.h (lock_cs): Define as a muto since critical sections seem to work
oddly on Windows Me.
(lock): Accommodate switch to muto.
(unlock): Ditto.
* exceptions.cc (setup_handler): Don't worry about acquiring mutos since that
hasn't mattered for a long time.
(signal_exit): Ditto: muto stuff will be handled automatically on exit now.
* Makefile.in (DLL_IMPORTS): Link advapi32 to ensure proper DLL initialization.
* autoload.cc (RegCloseKey): Arbitrarily choose this function as a "seed" to
pull the advapi32 link library in.  So, comment out the autoloading.
* cygtls.cc (_threadinfo::init_thread): Just clear CYGTLS_PADSIZE.
(_threadinfo::remove): Add debugging.
(_threadinfo::find_tls): Ditto.
* cygtls.h (_threadinfo::padding): Make zero length (for now?).
* dcrt0.cc (dll_crt0_0): Move more initialization here from dll_crt0_1.
(dll_crt0_1): See above.
* dtable.h (dtable::lock): Remove commented out critical section locking.
* dtable.h (dtable::init_lock): Remove commented out critical section locking.
* dtable.h (dtable::unlock): Remove commented out critical section locking.
* exceptions.cc (interruptible): bool'ize.
* init.cc (threadfunc_fe): Revert to storing threadfunc at stack bottom.
(munge_threadfunc): Ditto.  Avoid adding overhead to calibration_thread.
(prime_threads): Don't initialize tls stuff.
(dll_entry): Make minor change to initialization order.
* tlsoffsets.h: Regenerate.
* sigproc.cc (wait_sig): Add sanity check for end of process thread exit.
* select.h: Make minor formatting change.
* Makefile.in: Add still more -fomit-frame-pointer functions.
* dtable.h (dtable::lock): New function.
(dtable::unlock): New function.
(dtable::init_lock): New function.
* cygheap.h (HEAP_TLS): Declare new enum value.
(init_cygheap::threadlist): Declare new array.
(init_cygheap::sthreads): Declare new variable.
(cygheap_fdmanip::~cygheap_fdmanip): Use new dtable lock/unlock functions.
(cygheap_fdnew::cygheap_fdnew): Ditto.
(cygheap_fdget::cygheap_fdget): Ditto.
* dtable.cc (dtable_init): Initialize fdtab critical section.
(dtable::fixup_after_fork): Ditto.
(dtable::fixup_after_exec): Ditto.
(dtable::dup2): Use lock/unlock calls to protect access to fdtab.
(dtable::find_fifo): Ditto.
(dtable::fixup_before_fork): Ditto.
(dtable::fixup_before_exec): Ditto.
(dtable::set_file_pointers_for_exec): Ditto.
(dtable::vfork_child_dup): Ditto.
(dtable::vfork_parent_restore): Ditto.
* syscalls.cc (close_all_files): Ditto.
* sync.h (muto::acquired): Declare new function.
(new_muto1): Declare new macro used to specify name of muto storage.
* sync.cc (muto::acquired): Define new function.
* cygthread.cc (cygthread::stub): Remove signal chain removal call since it is
handled during initialization now.
* cygthread.cc (cygthread::simplestub): Remove signal chain removal call since
it is handled during initialization now.
* cygtls.cc (sentry): New class used for locking.  Use throughout.
(_threadinfo::reset_exception): Don't pop stack.
(_threadinfo::find_tls): Move from exceptions.cc.
(_threadinfo::init_thread): Initialize array of threads rather than linked
list.  Take second argument indicating thread function for this thread.
(_threadinfo::remove): Search thread array rather than linked list.  Use sentry
to lock.  Only unlock if we got the lock.
(_threadinfo::find_tls): Ditto for first two.
(handle_threadlist_exception): Handle exceptions when manipulating the thread
list in case of premature thread termination.
(_threadinfo::init_threadlist_exceptions): Ditto.
* cygtls.h (TLS_STACK_SIZE): Decrease size.
(_threadinfo::padding): Add element to avoid overwriting lower part of stack.
(_threadinfo::remove): Add a "wait" argument to control how long we wait for a
lock before removing.
* exceptions.cc (init_exception_handler): Make global.  Take argument to
control exception handler being set.
(ctrl_c_handler): Wait forever when removing self from signal chain.
(_threadinfo::find_tls): Move to cygtls.cc.
(sig_handle): Reorganize detection for thread-specific signals.
* heap.cc (heap_init): Rework slightly.  Make fatal error more verbose.  Remove
malloc initialization since it can't happen during dll attach.
* init.cc (search_for): Move address to search for on stack here.
(threadfunc_ix): Ditto for stack offset.  Make shared so that stack walk
potentially only has to be done once when cygwin processes are running.
(threadfunc_fe): Use standard tls to store thread function (may change back
later).
(calibration_thread): New function.  Potentially called to find threadfunc_ix.
(munge_threadfunc): Search for "search_for" value on stack.  Output warning
when thread func not found on stack.  Use standard tls to store thread
function.
(prime_threads): New function.  Called to prime thread front end.
(dll_entry): Call dll_crt0_0 here when DLL_PROCESS_ATTACH.  Call prime_threads
here.  Try to remove thread from signal list here.
* sigproc.cc (wait_sig): Initialize threadlist exception stuff here.
* thread.cc (pthread::exit): Pass argument to signal list remove function.
* thread.h: Remove obsolete *ResourceLock defines.
* tlsoffsets.h: Regenerate.
* winsup.h (spf): Define temporary debug macro to be deleted later.
* dcrt0.cc (dll_crt0_0): New function, called during DLL initialization.
Mainly consists of code pulled from dll_crt0_1.
(dll_crt0_1): See above.
(_dll_crt0): Wait for initial calibration thread to complete, if appropriate.
Move some stuff to dll_crt0_0.
(initialize_main_tls): Accommodate argument change to
_thread_info::init_thread.
* fork.cc (fork_child): Ditto.
(sync_with_child): Fix debug message.
* external.cc (cygwin_internal): Remove special considerations for
uninitialized dll since initialization happens during dll attach now.
* dlfcn.cc (dlopen): Remove obsolete *ResourceLock calls.
(dlclose): Ditto.
* cygheap.h (init_cygheap::close_ctty): Declare new function.
* cygheap.cc (init_cygheap::close_ctty): Define new function.
* syscalls.cc (close_all_files): Use close_ctty.
(setsid): Ditto.
* cygthread.cc (cygthread::stub): Remove exception initialization.
* cygthread.cc (cygthread::stub): Remove exception initialization.
(cygthread::simplestub): Ditto.
* thread.cc (pthread::thread_init_wrapper): Ditto.
* cygtls.cc (_last_thread): Make static.
(_threadinfo::call2): Initialize exception handler here.
(_threadinfo::find_tls): Move here.
* exceptions.cc (_threadinfo::find_tls): Move.
* dcrt0.cc (__api_fatal): Add prefix info to message here rather than including
it in every call to function.
* winsup.h (api_fatal): Accommodate above change.
* debug.cc (add_handle): Don't do anything if cygheap not around.
(mark_closed): Ditto.
* dll_init.cc (dll_list::detach): Fix debug output.
* fork.cc (sync_with_child): Ditto.
(vfork): Improve debug output.
* heap.cc (heap_init): Ditto.
* exceptions.cc (try_to_debug): Clarify message when debugger attaches.
This commit is contained in:
Christopher Faylor
2004-01-14 15:45:37 +00:00
parent d858958426
commit 2d1d1eb1e4
37 changed files with 757 additions and 428 deletions
Download Patch File Download Diff File Expand all files Collapse all files

325
winsup/cygwin/dcrt0.cc
View File

@@ -35,6 +35,7 @@ details. */
#include "dll_init.h"
#include "cygthread.h"
#include "sync.h"
#include "heap.h"
#define MAX_AT_FILE_LEVEL 10
@@ -55,11 +56,13 @@ bool strip_title_path;
bool allow_glob = true;
codepage_type current_codepage = ansi_cp;
static NO_COPY int mypid = 0;
int __argc_safe;
int _declspec(dllexport) __argc;
char _declspec(dllexport) **__argv;
vfork_save NO_COPY *main_vfork = NULL;
vfork_save NO_COPY *main_vfork;
static int NO_COPY envc;
char NO_COPY **envp;
extern "C" void __sinit (_reent *);
@@ -519,41 +522,127 @@ alloc_stack (child_info_fork *ci)
return;
}
/* Take over from libc's crt0.o and start the application. Note the
various special cases when Cygwin DLL is being runtime loaded (as
opposed to being link-time loaded by Cygwin apps) from a non
cygwin app via LoadLibrary. */
static void
dll_crt0_1 (char *)
#ifdef DEBUGGING
void
break_here ()
{
/* According to onno@stack.urc.tue.nl, the exception handler record must
be on the stack. */
/* FIXME: Verify forked children get their exception handler set up ok. */
exception_list cygwin_except_entry;
debug_printf ("break here");
}
#endif
/* Initialize SIGSEGV handling, etc. */
init_exceptions (&cygwin_except_entry);
static void
initial_env ()
{
char buf[CYG_MAX_PATH + 1];
#ifdef DEBUGGING
DWORD len;
if (GetEnvironmentVariable ("CYGWIN_SLEEP", buf, sizeof (buf) - 1))
{
DWORD ms = atoi (buf);
buf[0] = '\0';
len = GetModuleFileName (NULL, buf, CYG_MAX_PATH);
console_printf ("Sleeping %d, pid %u %s\n", ms, GetCurrentProcessId (), buf);
while (ms--)
Sleep (1);
}
if (GetEnvironmentVariable ("CYGWIN_DEBUG", buf, sizeof (buf) - 1))
{
char buf1[CYG_MAX_PATH + 1];
len = GetModuleFileName (NULL, buf1, CYG_MAX_PATH);
strlwr (buf1);
strlwr (buf);
char *p = strchr (buf, ':');
if (!p)
p = (char *) "gdb.exe -nw";
else
*p++ = '\0';
if (strstr (buf1, buf))
{
error_start_init (p);
try_to_debug ();
break_here ();
}
}
#endif
/* Set the os_being_run global. */
if (GetEnvironmentVariable ("CYGWIN_TESTING", buf, sizeof (buf) - 1))
_cygwin_testing = 1;
}
void __stdcall
dll_crt0_0 ()
{
wincap.init ();
initial_env ();
char zeros[sizeof (child_proc_info->zero)] = {0};
init_console_handler ();
init_global_security ();
if (!DuplicateHandle (GetCurrentProcess (), GetCurrentProcess (),
GetCurrentProcess (), &hMainProc, 0, FALSE,
DUPLICATE_SAME_ACCESS))
hMainProc = GetCurrentProcess ();
DuplicateHandle (hMainProc, GetCurrentThread (), hMainProc,
&hMainThread, 0, false, DUPLICATE_SAME_ACCESS);
(void) SetErrorMode (SEM_FAILCRITICALERRORS);
STARTUPINFO si;
GetStartupInfo (&si);
child_proc_info = (child_info *) si.lpReserved2;
int mypid = 0;
if (si.cbReserved2 < EXEC_MAGIC_SIZE || !child_proc_info
|| memcmp (child_proc_info->zero, zeros,
sizeof (child_proc_info->zero)) != 0)
child_proc_info = NULL;
else
{
if ((child_proc_info->intro & OPROC_MAGIC_MASK) == OPROC_MAGIC_GENERIC)
multiple_cygwin_problem ("proc", child_proc_info->intro, 0);
else if (child_proc_info->intro == PROC_MAGIC_GENERIC
&& child_proc_info->magic != CHILD_INFO_MAGIC)
multiple_cygwin_problem ("proc", child_proc_info->magic,
CHILD_INFO_MAGIC);
else if (child_proc_info->cygheap != (void *) &_cygheap_start)
multiple_cygwin_problem ("cygheap", (DWORD) child_proc_info->cygheap,
(DWORD) &_cygheap_start);
unsigned should_be_cb = 0;
switch (child_proc_info->type)
{
case _PROC_FORK:
user_data->forkee = child_proc_info->cygpid;
should_be_cb = sizeof (child_info_fork);
/* fall through */;
case _PROC_SPAWN:
case _PROC_EXEC:
if (!should_be_cb)
should_be_cb = sizeof (child_info);
if (should_be_cb != child_proc_info->cb)
multiple_cygwin_problem ("proc size", child_proc_info->cb, should_be_cb);
else if (sizeof (fhandler_union) != child_proc_info->fhandler_union_cb)
multiple_cygwin_problem ("fhandler size", child_proc_info->fhandler_union_cb, sizeof (fhandler_union));
else
{
cygwin_user_h = child_proc_info->user_h;
mypid = child_proc_info->cygpid;
break;
}
default:
system_printf ("unknown exec type %d", child_proc_info->type);
/* intentionally fall through */
case _PROC_WHOOPS:
child_proc_info = NULL;
break;
}
}
device::init ();
check_sanity_and_sync (user_data);
do_global_ctors (&__CTOR_LIST__, 1);
/* Nasty static stuff needed by newlib -- point to a local copy of
the reent stuff.
Note: this MUST be done here (before the forkee code) as the
fork copy code doesn't copy the data in libccrt0.cc (that's why we
pass in the per_process struct into the .dll from libccrt0). */
user_data->resourcelocks->Init ();
user_data->threadinterface->Init ();
winpids::init ();
int envc = 0;
char **envp = NULL;
do_global_ctors (&__CTOR_LIST__, 1);
cygthread::init ();
if (!child_proc_info)
memory_init ();
@@ -591,6 +680,7 @@ dll_crt0_1 (char *)
__argv = spawn_info->moreinfo->argv;
envp = spawn_info->moreinfo->envp;
envc = spawn_info->moreinfo->envc;
envp = spawn_info->moreinfo->envp;
cygheap->fdtab.fixup_after_exec (spawn_info->parent);
signal_fixup_after_exec ();
CloseHandle (spawn_info->parent);
@@ -607,9 +697,44 @@ dll_crt0_1 (char *)
CloseHandle (child_proc_info->pppid_handle);
}
_threadinfo::init ();
/* Initialize events */
events_init ();
/* Init global well known SID objects */
cygsid::init ();
cygheap->cwd.init ();
}
/* Take over from libc's crt0.o and start the application. Note the
various special cases when Cygwin DLL is being runtime loaded (as
opposed to being link-time loaded by Cygwin apps) from a non
cygwin app via LoadLibrary. */
static void
dll_crt0_1 (char *)
{
/* According to onno@stack.urc.tue.nl, the exception handler record must
be on the stack. */
/* FIXME: Verify forked children get their exception handler set up ok. */
exception_list cygwin_except_entry;
check_sanity_and_sync (user_data);
malloc_init ();
/* Initialize SIGSEGV handling, etc. */
init_exceptions (&cygwin_except_entry);
/* Nasty static stuff needed by newlib -- point to a local copy of
the reent stuff.
Note: this MUST be done here (before the forkee code) as the
fork copy code doesn't copy the data in libccrt0.cc (that's why we
pass in the per_process struct into the .dll from libccrt0). */
user_data->resourcelocks->Init ();
user_data->threadinterface->Init ();
ProtectHandle (hMainProc);
ProtectHandle (hMainThread);
cygthread::init ();
/* Initialize pthread mainthread when not forked and it is safe to call new,
otherwise it is reinitalized in fixup_after_fork */
@@ -629,12 +754,6 @@ dll_crt0_1 (char *)
cygheap->fdtab.vfork_child_fixup ();
(void) SetErrorMode (SEM_FAILCRITICALERRORS);
/* Initialize events. */
events_init ();
cygheap->cwd.init ();
main_vfork = vfork_storage.create ();
cygbench ("pre-forkee");
@@ -663,9 +782,6 @@ dll_crt0_1 (char *)
}
#endif
/* Init global well known SID objects */
cygsid::init ();
/* Initialize our process table entry. */
pinfo_init (envp, envc);
@@ -773,60 +889,13 @@ dll_crt0_1 (char *)
exit (user_data->main (__argc, __argv, *user_data->envptr));
}
#ifdef DEBUGGING
void
break_here ()
{
debug_printf ("break here");
}
#endif
void
initial_env ()
{
char buf[CYG_MAX_PATH + 1];
#ifdef DEBUGGING
DWORD len;
if (GetEnvironmentVariable ("CYGWIN_SLEEP", buf, sizeof (buf) - 1))
{
DWORD ms = atoi (buf);
buf[0] = '\0';
len = GetModuleFileName (NULL, buf, CYG_MAX_PATH);
console_printf ("Sleeping %d, pid %u %s\n", ms, GetCurrentProcessId (), buf);
Sleep (ms);
}
if (GetEnvironmentVariable ("CYGWIN_DEBUG", buf, sizeof (buf) - 1))
{
char buf1[CYG_MAX_PATH + 1];
len = GetModuleFileName (NULL, buf1, CYG_MAX_PATH);
strlwr (buf1);
strlwr (buf);
char *p = strchr (buf, ':');
if (!p)
p = (char *) "gdb.exe -nw";
else
*p++ = '\0';
if (strstr (buf1, buf))
{
error_start_init (p);
try_to_debug ();
break_here ();
}
}
#endif
if (GetEnvironmentVariable ("CYGWIN_TESTING", buf, sizeof (buf) - 1))
_cygwin_testing = 1;
}
struct _reent *
initialize_main_tls (char *padding)
{
if (!_main_tls)
{
_threadinfo::init ();
_main_tls = &_my_tls;
_main_tls->init_thread (padding);
_main_tls->init_thread (padding, NULL);
}
return &_main_tls->local_clib;
}
@@ -836,81 +905,31 @@ initialize_main_tls (char *padding)
UPTR is a pointer to global data that lives on the libc side of the
line [if one distinguishes the application from the dll]. */
extern "C" void __stdcall
_dll_crt0 ()
{
initial_env ();
char zeros[max (CYGTLS_PADSIZE, sizeof (child_proc_info->zero))] = {0};
static NO_COPY STARTUPINFO si;
extern HANDLE sync_startup;
if (sync_startup)
{
(void) WaitForSingleObject (sync_startup, INFINITE);
CloseHandle (sync_startup);
}
main_environ = user_data->envptr;
*main_environ = NULL;
init_console_handler ();
init_global_security ();
if (!DuplicateHandle (GetCurrentProcess (), GetCurrentProcess (),
GetCurrentProcess (), &hMainProc, 0, FALSE,
DUPLICATE_SAME_ACCESS))
hMainProc = GetCurrentProcess ();
if (child_proc_info && child_proc_info->type == _PROC_FORK)
user_data->forkee = child_proc_info->cygpid;
DuplicateHandle (hMainProc, GetCurrentThread (), hMainProc,
&hMainThread, 0, false, DUPLICATE_SAME_ACCESS);
GetStartupInfo (&si);
child_proc_info = (child_info *) si.lpReserved2;
if (si.cbReserved2 < EXEC_MAGIC_SIZE || !child_proc_info
|| memcmp (child_proc_info->zero, zeros,
sizeof (child_proc_info->zero)) != 0)
child_proc_info = NULL;
else
{
if ((child_proc_info->intro & OPROC_MAGIC_MASK) == OPROC_MAGIC_GENERIC)
multiple_cygwin_problem ("proc", child_proc_info->intro, 0);
else if (child_proc_info->intro == PROC_MAGIC_GENERIC
&& child_proc_info->magic != CHILD_INFO_MAGIC)
multiple_cygwin_problem ("proc", child_proc_info->magic,
CHILD_INFO_MAGIC);
else if (child_proc_info->cygheap != (void *) &_cygheap_start)
multiple_cygwin_problem ("cygheap", (DWORD) child_proc_info->cygheap,
(DWORD) &_cygheap_start);
unsigned should_be_cb = 0;
switch (child_proc_info->type)
{
case _PROC_FORK:
user_data->forkee = child_proc_info->cygpid;
should_be_cb = sizeof (child_info_fork);
/* fall through */;
case _PROC_SPAWN:
case _PROC_EXEC:
if (!should_be_cb)
should_be_cb = sizeof (child_info);
if (should_be_cb != child_proc_info->cb)
multiple_cygwin_problem ("proc size", child_proc_info->cb, should_be_cb);
else if (sizeof (fhandler_union) != child_proc_info->fhandler_union_cb)
multiple_cygwin_problem ("fhandler size", child_proc_info->fhandler_union_cb, sizeof (fhandler_union));
else
{
cygwin_user_h = child_proc_info->user_h;
mypid = child_proc_info->cygpid;
break;
}
default:
system_printf ("unknown exec type %d", child_proc_info->type);
/* intentionally fall through */
case _PROC_WHOOPS:
child_proc_info = NULL;
break;
}
}
char padding[CYGTLS_PADSIZE];
_impure_ptr = &reent_data;
_impure_ptr->_stdin = &_impure_ptr->__sf[0];
_impure_ptr->_stdout = &_impure_ptr->__sf[1];
_impure_ptr->_stderr = &_impure_ptr->__sf[2];
_impure_ptr->_current_locale = "C";
initialize_main_tls (zeros);
dll_crt0_1 (zeros);
initialize_main_tls (padding);
dll_crt0_1 (padding);
}
void
@@ -970,6 +989,7 @@ do_exit (int status)
}
EnterCriticalSection (&exit_lock);
muto::set_exiting_thread ();
if (exit_state < ES_EVENTS_TERMINATE)
{
exit_state = ES_EVENTS_TERMINATE;
@@ -1090,7 +1110,8 @@ __api_fatal (const char *fmt, ...)
va_list ap;
va_start (ap, fmt);
__small_vsprintf (buf, fmt, ap);
int n = __small_sprintf (buf, "%P (%u): *** ", cygwin_pid (GetCurrentProcessId ()));
__small_vsprintf (buf + n, fmt, ap);
va_end (ap);
strcat (buf, "\n");
int len = strlen (buf);