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Revert "ntdll: Fix possible deadlock in vectored exception handling." 

This reverts commit eb0e82a755.
It's causing different deadlocks, notably when a thread tries to
remove a handler inside a handler.
This commit is contained in:
Alexandre Julliard 2010-11-10 19:17:41 +01:00
parent 1309731b4a
commit 177a7e5683
3 changed files with 13 additions and 18 deletions
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29
dlls/ntdll/exception.c
View File

@ -48,17 +48,14 @@ typedef struct
static struct list vectored_handlers = LIST_INIT(vectored_handlers);
static RTL_RWLOCK vectored_handlers_lock;
/**********************************************************************
* exceptions_init
*
* Initialize read/write lock used by the vectored exception handling.
*/
void exceptions_init(void)
static RTL_CRITICAL_SECTION vectored_handlers_section;
static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
{
RtlInitializeResource(&vectored_handlers_lock);
}
0, 0, &vectored_handlers_section,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": vectored_handlers_section") }
};
static RTL_CRITICAL_SECTION vectored_handlers_section = { &critsect_debug, -1, 0, 0, 0, 0 };
/**********************************************************************
* wait_suspend
@ -165,7 +162,7 @@ LONG call_vectored_handlers( EXCEPTION_RECORD *rec, CONTEXT *context )
except_ptrs.ExceptionRecord = rec;
except_ptrs.ContextRecord = context;
RtlAcquireResourceShared( &vectored_handlers_lock, TRUE );
RtlEnterCriticalSection( &vectored_handlers_section );
LIST_FOR_EACH( ptr, &vectored_handlers )
{
VECTORED_HANDLER *handler = LIST_ENTRY( ptr, VECTORED_HANDLER, entry );
@ -175,7 +172,7 @@ LONG call_vectored_handlers( EXCEPTION_RECORD *rec, CONTEXT *context )
TRACE( "handler at %p returned %x\n", handler->func, ret );
if (ret == EXCEPTION_CONTINUE_EXECUTION) break;
}
RtlReleaseResource( &vectored_handlers_lock );
RtlLeaveCriticalSection( &vectored_handlers_section );
return ret;
}
@ -217,10 +214,10 @@ PVOID WINAPI RtlAddVectoredExceptionHandler( ULONG first, PVECTORED_EXCEPTION_HA
if (handler)
{
handler->func = func;
RtlAcquireResourceExclusive( &vectored_handlers_lock, TRUE );
RtlEnterCriticalSection( &vectored_handlers_section );
if (first) list_add_head( &vectored_handlers, &handler->entry );
else list_add_tail( &vectored_handlers, &handler->entry );
RtlReleaseResource( &vectored_handlers_lock );
RtlLeaveCriticalSection( &vectored_handlers_section );
}
return handler;
}
@ -234,7 +231,7 @@ ULONG WINAPI RtlRemoveVectoredExceptionHandler( PVOID handler )
struct list *ptr;
ULONG ret = FALSE;
RtlAcquireResourceExclusive( &vectored_handlers_lock, TRUE );
RtlEnterCriticalSection( &vectored_handlers_section );
LIST_FOR_EACH( ptr, &vectored_handlers )
{
VECTORED_HANDLER *curr_handler = LIST_ENTRY( ptr, VECTORED_HANDLER, entry );
@ -245,7 +242,7 @@ ULONG WINAPI RtlRemoveVectoredExceptionHandler( PVOID handler )
break;
}
}
RtlReleaseResource( &vectored_handlers_lock );
RtlLeaveCriticalSection( &vectored_handlers_section );
if (ret) RtlFreeHeap( GetProcessHeap(), 0, handler );
return ret;
}

1
dlls/ntdll/ntdll_misc.h
View File

@ -71,7 +71,6 @@ extern void virtual_init(void);
extern void virtual_init_threading(void);
extern void fill_cpu_info(void);
extern void heap_set_debug_flags( HANDLE handle );
extern void exceptions_init(void);
/* server support */
extern timeout_t server_start_time;

1
dlls/ntdll/thread.c
View File

@ -296,7 +296,6 @@ HANDLE thread_init(void)
user_shared_data->TickCountMultiplier = 1 << 24;
fill_cpu_info();
exceptions_init();
return exe_file;
}