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Added specific routines for OUTPUT_DEBUG_STRING and EXCEPTION debug events. 

Generate a breakpoint event on process attach.
Misc cleanups in request handling.
This commit is contained in:
Alexandre Julliard 2000-03-10 22:16:10 +00:00
parent ebd01a94aa
commit ea0d028a0b
16 changed files with 443 additions and 374 deletions
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25
dlls/ntdll/exception.c
View File

@ -13,9 +13,10 @@
#include "wine/exception.h"
#include "stackframe.h"
#include "miscemu.h"
#include "server.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(seh)
DEFAULT_DEBUG_CHANNEL(seh);
/* Exception record for handling exceptions happening inside exception handlers */
typedef struct
@ -84,6 +85,22 @@ static DWORD EXC_CallHandler( EXCEPTION_RECORD *record, EXCEPTION_FRAME *frame,
}
/**********************************************************************
* EXC_SendEvent
*
* Send an EXCEPTION_DEBUG_EVENT event to the debugger.
*/
static inline int send_debug_event( EXCEPTION_RECORD *rec, int first_chance, CONTEXT *context )
{
struct exception_event_request *req = get_req_buffer();
req->record = *rec;
req->first = first_chance;
req->context = *context;
if (!server_call_noerr( REQ_EXCEPTION_EVENT )) *context = req->context;
return req->status;
}
/*******************************************************************
* EXC_DefaultHandling
*
@ -91,8 +108,7 @@ static DWORD EXC_CallHandler( EXCEPTION_RECORD *record, EXCEPTION_FRAME *frame,
*/
static void EXC_DefaultHandling( EXCEPTION_RECORD *rec, CONTEXT *context )
{
if (DEBUG_SendExceptionEvent( rec, FALSE, context ) == DBG_CONTINUE)
return; /* continue execution */
if (send_debug_event( rec, FALSE, context ) == DBG_CONTINUE) return; /* continue execution */
if (rec->ExceptionFlags & EH_STACK_INVALID)
ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
@ -117,8 +133,7 @@ void WINAPI EXC_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context )
TRACE( "code=%lx flags=%lx\n", rec->ExceptionCode, rec->ExceptionFlags );
if (DEBUG_SendExceptionEvent( rec, TRUE, context ) == DBG_CONTINUE)
return; /* continue execution */
if (send_debug_event( rec, TRUE, context ) == DBG_CONTINUE) return; /* continue execution */
frame = NtCurrentTeb()->except;
nested_frame = NULL;

34
include/server.h
View File

@ -31,14 +31,8 @@ typedef WCHAR path_t[MAX_PATH+1];
/* definitions of the event data depending on the event code */
struct debug_event_exception
{
int code; /* exception code */
int flags; /* exception flags */
void *record; /* exception record ptr */
void *addr; /* exception address */
int nb_params; /* exceptions parameters */
int params[15];
int first_chance; /* first chance to handle it? */
CONTEXT context; /* thread context */
EXCEPTION_RECORD record; /* exception record */
int first; /* first chance exception? */
};
struct debug_event_create_thread
{
@ -813,11 +807,22 @@ struct wait_debug_event_request
};
/* Send a debug event */
struct send_debug_event_request
/* Send an exception event */
struct exception_event_request
{
OUT int status; /* event continuation status */
IN debug_event_t event; /* debug event data */
IN EXCEPTION_RECORD record; /* exception record */
IN int first; /* first chance exception? */
IN CONTEXT context; /* thread context */
OUT int status; /* event continuation status */
};
/* Send an output string to the debugger */
struct output_debug_string_request
{
IN void* string; /* string to display (in debugged process address space) */
IN int unicode; /* is it Unicode? */
IN int length; /* string length */
};
@ -1164,7 +1169,8 @@ enum request
REQ_CREATE_SNAPSHOT,
REQ_NEXT_PROCESS,
REQ_WAIT_DEBUG_EVENT,
REQ_SEND_DEBUG_EVENT,
REQ_EXCEPTION_EVENT,
REQ_OUTPUT_DEBUG_STRING,
REQ_CONTINUE_DEBUG_EVENT,
REQ_DEBUG_PROCESS,
REQ_READ_PROCESS_MEMORY,
@ -1196,7 +1202,7 @@ enum request
REQ_NB_REQUESTS
};
#define SERVER_PROTOCOL_VERSION 2
#define SERVER_PROTOCOL_VERSION 3
/* ### make_requests end ### */
/* Everything above this line is generated automatically by tools/make_requests */

60
scheduler/debugger.c
View File

@ -7,39 +7,12 @@
#include <string.h>
#include "winerror.h"
#include "process.h"
#include "server.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(debugstr);
/**********************************************************************
* DEBUG_SendExceptionEvent
*
* Send an EXCEPTION_DEBUG_EVENT event to the current process debugger.
*/
DWORD DEBUG_SendExceptionEvent( EXCEPTION_RECORD *rec, BOOL first_chance, CONTEXT *context )
{
int i;
struct send_debug_event_request *req = get_req_buffer();
req->event.code = EXCEPTION_DEBUG_EVENT;
req->event.info.exception.code = rec->ExceptionCode;
req->event.info.exception.flags = rec->ExceptionFlags;
req->event.info.exception.record = rec->ExceptionRecord;
req->event.info.exception.addr = rec->ExceptionAddress;
req->event.info.exception.nb_params = rec->NumberParameters;
req->event.info.exception.first_chance = first_chance;
req->event.info.exception.context = *context;
for (i = 0; i < req->event.info.exception.nb_params; i++)
req->event.info.exception.params[i] = rec->ExceptionInformation[i];
if (!server_call_noerr( REQ_SEND_DEBUG_EVENT ))
*context = req->event.info.exception.context;
return req->status;
}
/******************************************************************************
* WaitForDebugEvent (KERNEL32.720)
*
@ -54,7 +27,6 @@ DWORD DEBUG_SendExceptionEvent( EXCEPTION_RECORD *rec, BOOL first_chance, CONTEX
BOOL WINAPI WaitForDebugEvent( LPDEBUG_EVENT event, DWORD timeout )
{
struct wait_debug_event_request *req = get_req_buffer();
int i;
req->timeout = timeout;
if (server_call( REQ_WAIT_DEBUG_EVENT )) return FALSE;
@ -70,14 +42,8 @@ BOOL WINAPI WaitForDebugEvent( LPDEBUG_EVENT event, DWORD timeout )
SetLastError( ERROR_SEM_TIMEOUT );
return FALSE;
case EXCEPTION_DEBUG_EVENT:
event->u.Exception.ExceptionRecord.ExceptionCode = req->event.info.exception.code;
event->u.Exception.ExceptionRecord.ExceptionFlags = req->event.info.exception.flags;
event->u.Exception.ExceptionRecord.ExceptionRecord = req->event.info.exception.record;
event->u.Exception.ExceptionRecord.ExceptionAddress = req->event.info.exception.addr;
event->u.Exception.ExceptionRecord.NumberParameters = req->event.info.exception.nb_params;
for (i = 0; i < req->event.info.exception.nb_params; i++)
event->u.Exception.ExceptionRecord.ExceptionInformation[i] = req->event.info.exception.params[i];
event->u.Exception.dwFirstChance = req->event.info.exception.first_chance;
event->u.Exception.ExceptionRecord = req->event.info.exception.record;
event->u.Exception.dwFirstChance = req->event.info.exception.first;
break;
case CREATE_THREAD_DEBUG_EVENT:
event->u.CreateThread.hThread = req->event.info.create_thread.handle;
@ -158,12 +124,11 @@ BOOL WINAPI DebugActiveProcess( DWORD pid )
*/
void WINAPI OutputDebugStringA( LPCSTR str )
{
struct send_debug_event_request *req = get_req_buffer();
req->event.code = OUTPUT_DEBUG_STRING_EVENT;
req->event.info.output_string.string = (void *)str;
req->event.info.output_string.unicode = 0;
req->event.info.output_string.length = strlen(str) + 1;
server_call_noerr( REQ_SEND_DEBUG_EVENT );
struct output_debug_string_request *req = get_req_buffer();
req->string = (void *)str;
req->unicode = 0;
req->length = strlen(str) + 1;
server_call_noerr( REQ_OUTPUT_DEBUG_STRING );
TRACE("%s\n", str);
}
@ -173,12 +138,11 @@ void WINAPI OutputDebugStringA( LPCSTR str )
*/
void WINAPI OutputDebugStringW( LPCWSTR str )
{
struct send_debug_event_request *req = get_req_buffer();
req->event.code = OUTPUT_DEBUG_STRING_EVENT;
req->event.info.output_string.string = (void *)str;
req->event.info.output_string.unicode = 1;
req->event.info.output_string.length = (lstrlenW(str) + 1) * sizeof(WCHAR);
server_call_noerr( REQ_SEND_DEBUG_EVENT );
struct output_debug_string_request *req = get_req_buffer();
req->string = (void *)str;
req->unicode = 1;
req->length = (lstrlenW(str) + 1) * sizeof(WCHAR);
server_call_noerr( REQ_OUTPUT_DEBUG_STRING );
TRACE("%s\n", debugstr_w(str));
}

10
server/context_i386.c
View File

@ -457,13 +457,12 @@ static void copy_context( CONTEXT *to, CONTEXT *from, int flags )
DECL_HANDLER(get_thread_context)
{
struct thread *thread;
CONTEXT *context;
if ((thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT )))
{
if ((context = get_debug_context( thread ))) /* thread is inside an exception event */
if (thread->context) /* thread is inside an exception event */
{
copy_context( &req->context, context, req->flags );
copy_context( &req->context, thread->context, req->flags );
}
else
{
@ -481,13 +480,12 @@ DECL_HANDLER(get_thread_context)
DECL_HANDLER(set_thread_context)
{
struct thread *thread;
CONTEXT *context;
if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
{
if ((context = get_debug_context( thread ))) /* thread is inside an exception event */
if (thread->context) /* thread is inside an exception event */
{
copy_context( context, &req->context, req->flags );
copy_context( thread->context, &req->context, req->flags );
}
else
{

357
server/debugger.c
View File

@ -83,93 +83,132 @@ static const struct object_ops debug_ctx_ops =
};
/* initialise the fields that do not need to be filled by the client */
static int fill_debug_event( struct debug_event *event, void *arg )
/* routines to build an event according to its type */
static int fill_exception_event( struct debug_event *event, void *arg )
{
struct process *debugger = event->debugger->process;
struct process *process;
struct thread *thread;
struct process_dll *dll;
int handle;
/* some events need special handling */
switch(event->data.code)
{
case CREATE_THREAD_DEBUG_EVENT:
thread = arg;
/* documented: THREAD_GET_CONTEXT | THREAD_SET_CONTEXT | THREAD_SUSPEND_RESUME */
if ((handle = alloc_handle( debugger, thread, THREAD_ALL_ACCESS, FALSE )) == -1)
return 0;
event->data.info.create_thread.handle = handle;
event->data.info.create_thread.teb = thread->teb;
event->data.info.create_thread.start = thread->entry;
break;
case CREATE_PROCESS_DEBUG_EVENT:
process = arg;
thread = process->thread_list;
/* documented: PROCESS_VM_READ | PROCESS_VM_WRITE */
if ((handle = alloc_handle( debugger, process, PROCESS_ALL_ACCESS, FALSE )) == -1)
return 0;
event->data.info.create_process.process = handle;
/* documented: THREAD_GET_CONTEXT | THREAD_SET_CONTEXT | THREAD_SUSPEND_RESUME */
if ((handle = alloc_handle( debugger, thread, THREAD_ALL_ACCESS, FALSE )) == -1)
{
close_handle( debugger, event->data.info.create_process.process );
return 0;
}
event->data.info.create_process.thread = handle;
handle = -1;
if (process->exe.file &&
/* the doc says write access too, but this doesn't seem a good idea */
((handle = alloc_handle( debugger, process->exe.file, GENERIC_READ, FALSE )) == -1))
{
close_handle( debugger, event->data.info.create_process.process );
close_handle( debugger, event->data.info.create_process.thread );
return 0;
}
event->data.info.create_process.file = handle;
event->data.info.create_process.teb = thread->teb;
event->data.info.create_process.base = process->exe.base;
event->data.info.create_process.start = thread->entry;
event->data.info.create_process.dbg_offset = process->exe.dbg_offset;
event->data.info.create_process.dbg_size = process->exe.dbg_size;
event->data.info.create_process.name = 0;
event->data.info.create_process.unicode = 0;
break;
case LOAD_DLL_DEBUG_EVENT:
dll = arg;
handle = -1;
if (dll->file &&
(handle = alloc_handle( debugger, dll->file, GENERIC_READ, FALSE )) == -1)
return 0;
event->data.info.load_dll.handle = handle;
event->data.info.load_dll.base = dll->base;
event->data.info.load_dll.dbg_offset = dll->dbg_offset;
event->data.info.load_dll.dbg_size = dll->dbg_size;
event->data.info.load_dll.name = dll->name;
event->data.info.load_dll.unicode = 0;
break;
case EXIT_PROCESS_DEBUG_EVENT:
process = arg;
event->data.info.exit.exit_code = process->exit_code;
break;
case EXIT_THREAD_DEBUG_EVENT:
thread = arg;
event->data.info.exit.exit_code = thread->exit_code;
break;
case UNLOAD_DLL_DEBUG_EVENT:
event->data.info.unload_dll.base = arg;
break;
case EXCEPTION_DEBUG_EVENT:
case OUTPUT_DEBUG_STRING_EVENT:
case RIP_EVENT:
break;
}
memcpy( &event->data.info.exception, arg, sizeof(event->data.info.exception) );
return 1;
}
static int fill_create_thread_event( struct debug_event *event, void *arg )
{
struct process *debugger = event->debugger->process;
struct thread *thread = arg;
int handle;
/* documented: THREAD_GET_CONTEXT | THREAD_SET_CONTEXT | THREAD_SUSPEND_RESUME */
if ((handle = alloc_handle( debugger, thread, THREAD_ALL_ACCESS, FALSE )) == -1)
return 0;
event->data.info.create_thread.handle = handle;
event->data.info.create_thread.teb = thread->teb;
event->data.info.create_thread.start = thread->entry;
return 1;
}
static int fill_create_process_event( struct debug_event *event, void *arg )
{
struct process *debugger = event->debugger->process;
struct process *process = arg;
struct thread *thread = process->thread_list;
int handle;
/* documented: PROCESS_VM_READ | PROCESS_VM_WRITE */
if ((handle = alloc_handle( debugger, process, PROCESS_ALL_ACCESS, FALSE )) == -1)
return 0;
event->data.info.create_process.process = handle;
/* documented: THREAD_GET_CONTEXT | THREAD_SET_CONTEXT | THREAD_SUSPEND_RESUME */
if ((handle = alloc_handle( debugger, thread, THREAD_ALL_ACCESS, FALSE )) == -1)
{
close_handle( debugger, event->data.info.create_process.process );
return 0;
}
event->data.info.create_process.thread = handle;
handle = -1;
if (process->exe.file &&
/* the doc says write access too, but this doesn't seem a good idea */
((handle = alloc_handle( debugger, process->exe.file, GENERIC_READ, FALSE )) == -1))
{
close_handle( debugger, event->data.info.create_process.process );
close_handle( debugger, event->data.info.create_process.thread );
return 0;
}
event->data.info.create_process.file = handle;
event->data.info.create_process.teb = thread->teb;
event->data.info.create_process.base = process->exe.base;
event->data.info.create_process.start = thread->entry;
event->data.info.create_process.dbg_offset = process->exe.dbg_offset;
event->data.info.create_process.dbg_size = process->exe.dbg_size;
event->data.info.create_process.name = 0;
event->data.info.create_process.unicode = 0;
return 1;
}
static int fill_exit_thread_event( struct debug_event *event, void *arg )
{
struct thread *thread = arg;
event->data.info.exit.exit_code = thread->exit_code;
return 1;
}
static int fill_exit_process_event( struct debug_event *event, void *arg )
{
struct process *process = arg;
event->data.info.exit.exit_code = process->exit_code;
return 1;
}
static int fill_load_dll_event( struct debug_event *event, void *arg )
{
struct process *debugger = event->debugger->process;
struct process_dll *dll = arg;
int handle = -1;
if (dll->file && (handle = alloc_handle( debugger, dll->file, GENERIC_READ, FALSE )) == -1)
return 0;
event->data.info.load_dll.handle = handle;
event->data.info.load_dll.base = dll->base;
event->data.info.load_dll.dbg_offset = dll->dbg_offset;
event->data.info.load_dll.dbg_size = dll->dbg_size;
event->data.info.load_dll.name = dll->name;
event->data.info.load_dll.unicode = 0;
return 1;
}
static int fill_unload_dll_event( struct debug_event *event, void *arg )
{
event->data.info.unload_dll.base = arg;
return 1;
}
static int fill_output_debug_string_event( struct debug_event *event, void *arg )
{
struct output_debug_string_request *req = arg;
event->data.info.output_string.string = req->string;
event->data.info.output_string.unicode = req->unicode;
event->data.info.output_string.length = req->length;
return 1;
}
typedef int (*fill_event_func)( struct debug_event *event, void *arg );
#define NB_DEBUG_EVENTS OUTPUT_DEBUG_STRING_EVENT /* RIP_EVENT not supported */
static const fill_event_func fill_debug_event[NB_DEBUG_EVENTS] =
{
fill_exception_event, /* EXCEPTION_DEBUG_EVENT */
fill_create_thread_event, /* CREATE_THREAD_DEBUG_EVENT */
fill_create_process_event, /* CREATE_PROCESS_DEBUG_EVENT */
fill_exit_thread_event, /* EXIT_THREAD_DEBUG_EVENT */
fill_exit_process_event, /* EXIT_PROCESS_DEBUG_EVENT */
fill_load_dll_event, /* LOAD_DLL_DEBUG_EVENT */
fill_unload_dll_event, /* UNLOAD_DLL_DEBUG_EVENT */
fill_output_debug_string_event /* OUTPUT_DEBUG_STRING_EVENT */
};
/* unlink the first event from the queue */
static void unlink_event( struct debug_ctx *debug_ctx, struct debug_event *event )
{
@ -228,18 +267,13 @@ static void build_wait_debug_reply( struct thread *thread, struct object *obj, i
}
/* build a reply for the send_event request */
static void build_send_event_reply( struct thread *thread, struct object *obj, int signaled )
static void build_exception_event_reply( struct thread *thread, struct object *obj, int signaled )
{
struct send_debug_event_request *req = get_req_ptr( thread );
struct exception_event_request *req = get_req_ptr( thread );
struct debug_event *event = (struct debug_event *)obj;
assert( obj->ops == &debug_event_ops );
req->status = event->status;
/* copy the context into the reply */
if (event->data.code == EXCEPTION_DEBUG_EVENT)
memcpy( &req->event.info.exception.context,
&event->data.info.exception.context,
sizeof(req->event.info.exception.context) );
thread->context = NULL;
}
static void debug_event_dump( struct object *obj, int verbose )
@ -363,28 +397,27 @@ static int continue_debug_event( struct process *process, struct thread *thread,
}
/* queue a debug event for a debugger */
static struct debug_event *queue_debug_event( struct thread *thread, int code, void *arg,
debug_event_t *data )
static struct debug_event *queue_debug_event( struct thread *thread, int code, void *arg )
{
struct thread *debugger = thread->process->debugger;
struct debug_ctx *debug_ctx = debugger->debug_ctx;
struct debug_event *event;
assert( code > 0 && code <= NB_DEBUG_EVENTS );
assert( debug_ctx );
/* cannot queue a debug event for myself */
assert( debugger->process != thread->process );
/* build the event */
if (!(event = alloc_object( &debug_event_ops, -1 ))) return NULL;
event->next = NULL;
event->prev = NULL;
event->state = EVENT_QUEUED;
event->sender = (struct thread *)grab_object( thread );
event->debugger = (struct thread *)grab_object( debugger );
if (data) memcpy( &event->data, data, sizeof(event->data) );
event->next = NULL;
event->prev = NULL;
event->state = EVENT_QUEUED;
event->sender = (struct thread *)grab_object( thread );
event->debugger = (struct thread *)grab_object( debugger );
event->data.code = code;
if (!fill_debug_event( event, arg ))
if (!fill_debug_event[code-1]( event, arg ))
{
event->data.code = -1; /* make sure we don't attempt to close handles */
release_object( event );
@ -401,11 +434,43 @@ void generate_debug_event( struct thread *thread, int code, void *arg )
{
if (thread->process->debugger)
{
struct debug_event *event = queue_debug_event( thread, code, arg, NULL );
struct debug_event *event = queue_debug_event( thread, code, arg );
if (event) release_object( event );
}
}
/* attach a process to a debugger thread and suspend it */
static int debugger_attach( struct process *process, struct thread *debugger )
{
struct thread *thread;
if (process->debugger) goto error; /* already being debugged */
if (process->init_event) goto error; /* still starting up */
/* make sure we don't create a debugging loop */
for (thread = debugger; thread; thread = thread->process->debugger)
if (thread->process == process) goto error;
suspend_process( process );
/* we must have been able to attach all threads */
for (thread = process->thread_list; thread; thread = thread->proc_next)
if (!thread->attached)
{
fprintf( stderr, "%p not attached\n", thread );
resume_process( process );
goto error;
}
if (set_process_debugger( process, debugger )) return 1;
resume_process( process );
return 0;
error:
set_error( STATUS_ACCESS_DENIED );
return 0;
}
/* generate all startup events of a given process */
void generate_startup_debug_events( struct process *process )
{
@ -426,40 +491,12 @@ void generate_startup_debug_events( struct process *process )
}
}
/* return a pointer to the context in case the thread is inside an exception event */
CONTEXT *get_debug_context( struct thread *thread )
{
struct debug_event *event;
struct thread *debugger = thread->process->debugger;
if (!debugger) return NULL; /* not being debugged */
assert( debugger->debug_ctx );
/* find the exception event in the debugger's queue */
for (event = debugger->debug_ctx->event_head; event; event = event->next)
if (event->sender == thread && (event->data.code == EXCEPTION_DEBUG_EVENT))
return &event->data.info.exception.context;
return NULL;
}
/* attach a process to a debugger thread */
int debugger_attach( struct process *process, struct thread *debugger )
/* set the debugger of a given process */
int set_process_debugger( struct process *process, struct thread *debugger )
{
struct debug_ctx *debug_ctx;
struct thread *thread;
if (process->debugger) /* already being debugged */
{
set_error( STATUS_ACCESS_DENIED );
return 0;
}
/* make sure we don't create a debugging loop */
for (thread = debugger; thread; thread = thread->process->debugger)
if (thread->process == process)
{
set_error( STATUS_ACCESS_DENIED );
return 0;
}
assert( !process->debugger );
if (!debugger->debug_ctx) /* need to allocate a context */
{
@ -515,34 +552,54 @@ DECL_HANDLER(continue_debug_event)
/* Start debugging an existing process */
DECL_HANDLER(debug_process)
{
struct debug_event_exception data;
struct debug_event *event;
struct process *process = get_process_from_id( req->pid );
if (!process) return;
if (debugger_attach( process, current ))
{
generate_startup_debug_events( process );
/* FIXME: breakpoint exception event */
resume_process( process );
data.record.ExceptionCode = EXCEPTION_BREAKPOINT;
data.record.ExceptionFlags = EXCEPTION_CONTINUABLE;
data.record.ExceptionRecord = NULL;
data.record.ExceptionAddress = process->thread_list->entry; /* FIXME */
data.record.NumberParameters = 0;
data.first = 1;
if ((event = queue_debug_event( process->thread_list, EXCEPTION_DEBUG_EVENT, &data )))
release_object( event );
}
release_object( process );
}
/* Send a debug event */
DECL_HANDLER(send_debug_event)
/* send an exception event */
DECL_HANDLER(exception_event)
{
struct debug_event *event;
int code = req->event.code;
if (current->process->debugger)
{
struct debug_event_exception data;
struct debug_event *event;
if ((code <= 0) || (code > RIP_EVENT))
{
fatal_protocol_error( current, "send_debug_event: bad code %d\n", code );
return;
}
req->status = 0;
if (current->process->debugger && ((event = queue_debug_event( current, code,
NULL, &req->event ))))
{
/* wait for continue_debug_event */
struct object *obj = &event->obj;
sleep_on( 1, &obj, 0, -1, build_send_event_reply );
release_object( event );
data.record = req->record;
data.first = req->first;
if ((event = queue_debug_event( current, EXCEPTION_DEBUG_EVENT, &data )))
{
struct object *obj = &event->obj;
current->context = &req->context;
sleep_on( 1, &obj, 0, -1, build_exception_event_reply );
release_object( event );
}
}
}
/* send an output string to the debugger */
DECL_HANDLER(output_debug_string)
{
if (current->process->debugger)
{
struct debug_event *event = queue_debug_event( current, OUTPUT_DEBUG_STRING_EVENT, req );
if (event) release_object( event );
}
}

8
server/file.c
View File

@ -468,15 +468,17 @@ DECL_HANDLER(alloc_file_handle)
struct file *file;
req->handle = -1;
if ((fd = dup(fd)) != -1)
if (current->pass_fd != -1)
{
if ((file = create_file_for_fd( fd, req->access, FILE_SHARE_READ | FILE_SHARE_WRITE, 0 )))
if ((file = create_file_for_fd( current->pass_fd, req->access,
FILE_SHARE_READ | FILE_SHARE_WRITE, 0 )))
{
req->handle = alloc_handle( current->process, file, req->access, 0 );
release_object( file );
}
current->pass_fd = -1;
}
else file_set_error();
else set_error( STATUS_INVALID_PARAMETER );
}
/* get a Unix fd to read from a file */

2
server/main.c
View File

@ -60,7 +60,6 @@ static void sigterm_handler()
/* initialize signal handling */
static void signal_init(void)
{
#if 0
if (!debug_level)
{
switch(fork())
@ -74,7 +73,6 @@ static void signal_init(void)
exit(0);
}
}
#endif
signal( SIGPIPE, SIG_IGN );
signal( SIGHUP, sigterm_handler );
signal( SIGINT, sigterm_handler );

3
server/object.h
View File

@ -153,11 +153,10 @@ extern int free_console( struct process *process );
/* debugger functions */
extern int debugger_attach( struct process *process, struct thread *debugger );
extern int set_process_debugger( struct process *process, struct thread *debugger );
extern void generate_debug_event( struct thread *thread, int code, void *arg );
extern void generate_startup_debug_events( struct process *process );
extern void debug_exit_thread( struct thread *thread );
extern CONTEXT *get_debug_context( struct thread *thread );
/* mapping functions */

4
server/process.c
View File

@ -201,9 +201,9 @@ struct thread *create_process( int fd, struct process *parent,
/* attach to the debugger if requested */
if (process->create_flags & (DEBUG_PROCESS | DEBUG_ONLY_THIS_PROCESS))
debugger_attach( process, current );
set_process_debugger( process, current );
else if (parent && parent->debugger && !(parent->create_flags & DEBUG_ONLY_THIS_PROCESS))
debugger_attach( process, parent->debugger );
set_process_debugger( process, parent->debugger );
release_object( process );
return thread;

10
server/request.c
View File

@ -127,16 +127,16 @@ static void fatal_perror( const char *err, ... )
}
/* call a request handler */
static void call_req_handler( struct thread *thread, enum request req, int fd )
static inline void call_req_handler( struct thread *thread, enum request req )
{
current = thread;
clear_error();
if (debug_level) trace_request( req, fd );
if (debug_level) trace_request( req );
if (req < REQ_NB_REQUESTS)
{
req_handlers[req].handler( current->buffer, fd );
req_handlers[req]( current->buffer );
if (current && !current->wait) send_reply( current );
current = NULL;
return;
@ -186,10 +186,8 @@ void read_request( struct thread *thread )
if (ret == sizeof(req))
{
int pass_fd = thread->pass_fd;
call_req_handler( thread, req );
thread->pass_fd = -1;
call_req_handler( thread, req, pass_fd );
if (pass_fd != -1) close( pass_fd );
return;
}
if (ret == -1)

219
server/request.h
View File

@ -22,20 +22,26 @@
#define PROTOCOL_ERROR -3
/* request handler definition */
#define DECL_HANDLER(name) void req_##name( struct name##_request *req, int fd )
#define DECL_HANDLER(name) void req_##name( struct name##_request *req )
/* request functions */
#ifdef __GNUC__
extern void fatal_protocol_error( struct thread *thread,
const char *err, ... ) __attribute__((format (printf,2,3)));
#else
extern void fatal_protocol_error( struct thread *thread, const char *err, ... );
#endif
extern void read_request( struct thread *thread );
extern int write_request( struct thread *thread );
extern void fatal_protocol_error( struct thread *thread, const char *err, ... );
extern void set_reply_fd( struct thread *thread, int pass_fd );
extern void send_reply( struct thread *thread );
extern void open_master_socket(void);
extern void close_master_socket(void);
extern void lock_master_socket( int locked );
extern void trace_request( enum request req, int fd );
extern void trace_request( enum request req );
extern void trace_reply( struct thread *thread );
/* get the request buffer */
@ -138,7 +144,8 @@ DECL_HANDLER(create_device);
DECL_HANDLER(create_snapshot);
DECL_HANDLER(next_process);
DECL_HANDLER(wait_debug_event);
DECL_HANDLER(send_debug_event);
DECL_HANDLER(exception_event);
DECL_HANDLER(output_debug_string);
DECL_HANDLER(continue_debug_event);
DECL_HANDLER(debug_process);
DECL_HANDLER(read_process_memory);
@ -170,108 +177,108 @@ DECL_HANDLER(get_atom_name);
#ifdef WANT_REQUEST_HANDLERS
static const struct handler {
void (*handler)( void *req, int fd );
unsigned int min_size;
} req_handlers[REQ_NB_REQUESTS] = {
{ (void(*)())req_new_process, sizeof(struct new_process_request) },
{ (void(*)())req_new_thread, sizeof(struct new_thread_request) },
{ (void(*)())req_boot_done, sizeof(struct boot_done_request) },
{ (void(*)())req_init_process, sizeof(struct init_process_request) },
{ (void(*)())req_init_process_done, sizeof(struct init_process_done_request) },
{ (void(*)())req_init_thread, sizeof(struct init_thread_request) },
{ (void(*)())req_get_thread_buffer, sizeof(struct get_thread_buffer_request) },
{ (void(*)())req_terminate_process, sizeof(struct terminate_process_request) },
{ (void(*)())req_terminate_thread, sizeof(struct terminate_thread_request) },
{ (void(*)())req_get_process_info, sizeof(struct get_process_info_request) },
{ (void(*)())req_set_process_info, sizeof(struct set_process_info_request) },
{ (void(*)())req_get_thread_info, sizeof(struct get_thread_info_request) },
{ (void(*)())req_set_thread_info, sizeof(struct set_thread_info_request) },
{ (void(*)())req_suspend_thread, sizeof(struct suspend_thread_request) },
{ (void(*)())req_resume_thread, sizeof(struct resume_thread_request) },
{ (void(*)())req_load_dll, sizeof(struct load_dll_request) },
{ (void(*)())req_unload_dll, sizeof(struct unload_dll_request) },
{ (void(*)())req_queue_apc, sizeof(struct queue_apc_request) },
{ (void(*)())req_get_apcs, sizeof(struct get_apcs_request) },
{ (void(*)())req_close_handle, sizeof(struct close_handle_request) },
{ (void(*)())req_get_handle_info, sizeof(struct get_handle_info_request) },
{ (void(*)())req_set_handle_info, sizeof(struct set_handle_info_request) },
{ (void(*)())req_dup_handle, sizeof(struct dup_handle_request) },
{ (void(*)())req_open_process, sizeof(struct open_process_request) },
{ (void(*)())req_select, sizeof(struct select_request) },
{ (void(*)())req_create_event, sizeof(struct create_event_request) },
{ (void(*)())req_event_op, sizeof(struct event_op_request) },
{ (void(*)())req_open_event, sizeof(struct open_event_request) },
{ (void(*)())req_create_mutex, sizeof(struct create_mutex_request) },
{ (void(*)())req_release_mutex, sizeof(struct release_mutex_request) },
{ (void(*)())req_open_mutex, sizeof(struct open_mutex_request) },
{ (void(*)())req_create_semaphore, sizeof(struct create_semaphore_request) },
{ (void(*)())req_release_semaphore, sizeof(struct release_semaphore_request) },
{ (void(*)())req_open_semaphore, sizeof(struct open_semaphore_request) },
{ (void(*)())req_create_file, sizeof(struct create_file_request) },
{ (void(*)())req_alloc_file_handle, sizeof(struct alloc_file_handle_request) },
{ (void(*)())req_get_read_fd, sizeof(struct get_read_fd_request) },
{ (void(*)())req_get_write_fd, sizeof(struct get_write_fd_request) },
{ (void(*)())req_set_file_pointer, sizeof(struct set_file_pointer_request) },
{ (void(*)())req_truncate_file, sizeof(struct truncate_file_request) },
{ (void(*)())req_set_file_time, sizeof(struct set_file_time_request) },
{ (void(*)())req_flush_file, sizeof(struct flush_file_request) },
{ (void(*)())req_get_file_info, sizeof(struct get_file_info_request) },
{ (void(*)())req_lock_file, sizeof(struct lock_file_request) },
{ (void(*)())req_unlock_file, sizeof(struct unlock_file_request) },
{ (void(*)())req_create_pipe, sizeof(struct create_pipe_request) },
{ (void(*)())req_create_socket, sizeof(struct create_socket_request) },
{ (void(*)())req_accept_socket, sizeof(struct accept_socket_request) },
{ (void(*)())req_set_socket_event, sizeof(struct set_socket_event_request) },
{ (void(*)())req_get_socket_event, sizeof(struct get_socket_event_request) },
{ (void(*)())req_enable_socket_event, sizeof(struct enable_socket_event_request) },
{ (void(*)())req_alloc_console, sizeof(struct alloc_console_request) },
{ (void(*)())req_free_console, sizeof(struct free_console_request) },
{ (void(*)())req_open_console, sizeof(struct open_console_request) },
{ (void(*)())req_set_console_fd, sizeof(struct set_console_fd_request) },
{ (void(*)())req_get_console_mode, sizeof(struct get_console_mode_request) },
{ (void(*)())req_set_console_mode, sizeof(struct set_console_mode_request) },
{ (void(*)())req_set_console_info, sizeof(struct set_console_info_request) },
{ (void(*)())req_get_console_info, sizeof(struct get_console_info_request) },
{ (void(*)())req_write_console_input, sizeof(struct write_console_input_request) },
{ (void(*)())req_read_console_input, sizeof(struct read_console_input_request) },
{ (void(*)())req_create_change_notification, sizeof(struct create_change_notification_request) },
{ (void(*)())req_create_mapping, sizeof(struct create_mapping_request) },
{ (void(*)())req_open_mapping, sizeof(struct open_mapping_request) },
{ (void(*)())req_get_mapping_info, sizeof(struct get_mapping_info_request) },
{ (void(*)())req_create_device, sizeof(struct create_device_request) },
{ (void(*)())req_create_snapshot, sizeof(struct create_snapshot_request) },
{ (void(*)())req_next_process, sizeof(struct next_process_request) },
{ (void(*)())req_wait_debug_event, sizeof(struct wait_debug_event_request) },
{ (void(*)())req_send_debug_event, sizeof(struct send_debug_event_request) },
{ (void(*)())req_continue_debug_event, sizeof(struct continue_debug_event_request) },
{ (void(*)())req_debug_process, sizeof(struct debug_process_request) },
{ (void(*)())req_read_process_memory, sizeof(struct read_process_memory_request) },
{ (void(*)())req_write_process_memory, sizeof(struct write_process_memory_request) },
{ (void(*)())req_create_key, sizeof(struct create_key_request) },
{ (void(*)())req_open_key, sizeof(struct open_key_request) },
{ (void(*)())req_delete_key, sizeof(struct delete_key_request) },
{ (void(*)())req_close_key, sizeof(struct close_key_request) },
{ (void(*)())req_enum_key, sizeof(struct enum_key_request) },
{ (void(*)())req_query_key_info, sizeof(struct query_key_info_request) },
{ (void(*)())req_set_key_value, sizeof(struct set_key_value_request) },
{ (void(*)())req_get_key_value, sizeof(struct get_key_value_request) },
{ (void(*)())req_enum_key_value, sizeof(struct enum_key_value_request) },
{ (void(*)())req_delete_key_value, sizeof(struct delete_key_value_request) },
{ (void(*)())req_load_registry, sizeof(struct load_registry_request) },
{ (void(*)())req_save_registry, sizeof(struct save_registry_request) },
{ (void(*)())req_set_registry_levels, sizeof(struct set_registry_levels_request) },
{ (void(*)())req_create_timer, sizeof(struct create_timer_request) },
{ (void(*)())req_open_timer, sizeof(struct open_timer_request) },
{ (void(*)())req_set_timer, sizeof(struct set_timer_request) },
{ (void(*)())req_cancel_timer, sizeof(struct cancel_timer_request) },
{ (void(*)())req_get_thread_context, sizeof(struct get_thread_context_request) },
{ (void(*)())req_set_thread_context, sizeof(struct set_thread_context_request) },
{ (void(*)())req_get_selector_entry, sizeof(struct get_selector_entry_request) },
{ (void(*)())req_add_atom, sizeof(struct add_atom_request) },
{ (void(*)())req_delete_atom, sizeof(struct delete_atom_request) },
{ (void(*)())req_find_atom, sizeof(struct find_atom_request) },
{ (void(*)())req_get_atom_name, sizeof(struct get_atom_name_request) },
typedef void (*req_handler)( void *req );
static const req_handler req_handlers[REQ_NB_REQUESTS] =
{
(req_handler)req_new_process,
(req_handler)req_new_thread,
(req_handler)req_boot_done,
(req_handler)req_init_process,
(req_handler)req_init_process_done,
(req_handler)req_init_thread,
(req_handler)req_get_thread_buffer,
(req_handler)req_terminate_process,
(req_handler)req_terminate_thread,
(req_handler)req_get_process_info,
(req_handler)req_set_process_info,
(req_handler)req_get_thread_info,
(req_handler)req_set_thread_info,
(req_handler)req_suspend_thread,
(req_handler)req_resume_thread,
(req_handler)req_load_dll,
(req_handler)req_unload_dll,
(req_handler)req_queue_apc,
(req_handler)req_get_apcs,
(req_handler)req_close_handle,
(req_handler)req_get_handle_info,
(req_handler)req_set_handle_info,
(req_handler)req_dup_handle,
(req_handler)req_open_process,
(req_handler)req_select,
(req_handler)req_create_event,
(req_handler)req_event_op,
(req_handler)req_open_event,
(req_handler)req_create_mutex,
(req_handler)req_release_mutex,
(req_handler)req_open_mutex,
(req_handler)req_create_semaphore,
(req_handler)req_release_semaphore,
(req_handler)req_open_semaphore,
(req_handler)req_create_file,
(req_handler)req_alloc_file_handle,
(req_handler)req_get_read_fd,
(req_handler)req_get_write_fd,
(req_handler)req_set_file_pointer,
(req_handler)req_truncate_file,
(req_handler)req_set_file_time,
(req_handler)req_flush_file,
(req_handler)req_get_file_info,
(req_handler)req_lock_file,
(req_handler)req_unlock_file,
(req_handler)req_create_pipe,
(req_handler)req_create_socket,
(req_handler)req_accept_socket,
(req_handler)req_set_socket_event,
(req_handler)req_get_socket_event,
(req_handler)req_enable_socket_event,
(req_handler)req_alloc_console,
(req_handler)req_free_console,
(req_handler)req_open_console,
(req_handler)req_set_console_fd,
(req_handler)req_get_console_mode,
(req_handler)req_set_console_mode,
(req_handler)req_set_console_info,
(req_handler)req_get_console_info,
(req_handler)req_write_console_input,
(req_handler)req_read_console_input,
(req_handler)req_create_change_notification,
(req_handler)req_create_mapping,
(req_handler)req_open_mapping,
(req_handler)req_get_mapping_info,
(req_handler)req_create_device,
(req_handler)req_create_snapshot,
(req_handler)req_next_process,
(req_handler)req_wait_debug_event,
(req_handler)req_exception_event,
(req_handler)req_output_debug_string,
(req_handler)req_continue_debug_event,
(req_handler)req_debug_process,
(req_handler)req_read_process_memory,
(req_handler)req_write_process_memory,
(req_handler)req_create_key,
(req_handler)req_open_key,
(req_handler)req_delete_key,
(req_handler)req_close_key,
(req_handler)req_enum_key,
(req_handler)req_query_key_info,
(req_handler)req_set_key_value,
(req_handler)req_get_key_value,
(req_handler)req_enum_key_value,
(req_handler)req_delete_key_value,
(req_handler)req_load_registry,
(req_handler)req_save_registry,
(req_handler)req_set_registry_levels,
(req_handler)req_create_timer,
(req_handler)req_open_timer,
(req_handler)req_set_timer,
(req_handler)req_cancel_timer,
(req_handler)req_get_thread_context,
(req_handler)req_set_thread_context,
(req_handler)req_get_selector_entry,
(req_handler)req_add_atom,
(req_handler)req_delete_atom,
(req_handler)req_find_atom,
(req_handler)req_get_atom_name,
};
#endif /* WANT_REQUEST_HANDLERS */

1
server/thread.c
View File

@ -126,6 +126,7 @@ struct thread *create_thread( int fd, struct process *process, int suspend )
if (!(thread = alloc_object( &thread_ops, fd ))) return NULL;
thread->unix_pid = 0; /* not known yet */
thread->context = NULL;
thread->teb = NULL;
thread->mutex = NULL;
thread->debug_ctx = NULL;

1
server/thread.h
View File

@ -47,6 +47,7 @@ struct thread
int attached; /* is thread attached with ptrace? */
int exit_code; /* thread exit code */
int unix_pid; /* Unix pid of client */
CONTEXT *context; /* current context if in an exception handler */
void *teb; /* TEB address (in client address space) */
void *entry; /* thread entry point (in client address space) */
int priority; /* priority level */

61
server/trace.c
View File

@ -79,23 +79,28 @@ static void dump_context( const CONTEXT *context )
#endif
}
static void dump_debug_event_t( const debug_event_t *event )
static void dump_exc_record( const EXCEPTION_RECORD *rec )
{
int i;
fprintf( stderr, "{code=%lx,flags=%lx,rec=%p,addr=%p,params={",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionRecord,
rec->ExceptionAddress );
for (i = 0; i < rec->NumberParameters; i++)
{
if (i) fputc( ',', stderr );
fprintf( stderr, "%lx", rec->ExceptionInformation[i] );
}
fputc( '}', stderr );
}
static void dump_debug_event_t( const debug_event_t *event )
{
switch(event->code)
{
case EXCEPTION_DEBUG_EVENT:
fprintf( stderr, "{exception,code=%x,flags=%x,rec=%p,addr=%p,params={",
event->info.exception.code, event->info.exception.flags,
event->info.exception.record, event->info.exception.addr );
for (i = 0; i < event->info.exception.nb_params; i++)
{
if (i) fputc( ',', stderr );
fprintf( stderr, "%x", event->info.exception.params[i] );
}
fprintf( stderr, "},first_chance=%d,context=", event->info.exception.first_chance );
dump_context( &event->info.exception.context );
fputc( '}', stderr );
fprintf( stderr, "{exception," );
dump_exc_record( &event->info.exception.record );
fprintf( stderr, ",first=%d}", event->info.exception.first );
break;
case CREATE_THREAD_DEBUG_EVENT:
fprintf( stderr, "{create_thread,thread=%d,teb=%p,start=%p}",
@ -927,17 +932,28 @@ static void dump_wait_debug_event_reply( const struct wait_debug_event_request *
dump_debug_event_t( &req->event );
}
static void dump_send_debug_event_request( const struct send_debug_event_request *req )
static void dump_exception_event_request( const struct exception_event_request *req )
{
fprintf( stderr, " event=" );
dump_debug_event_t( &req->event );
fprintf( stderr, " record=" );
dump_exc_record( &req->record );
fprintf( stderr, "," );
fprintf( stderr, " first=%d,", req->first );
fprintf( stderr, " context=" );
dump_context( &req->context );
}
static void dump_send_debug_event_reply( const struct send_debug_event_request *req )
static void dump_exception_event_reply( const struct exception_event_request *req )
{
fprintf( stderr, " status=%d", req->status );
}
static void dump_output_debug_string_request( const struct output_debug_string_request *req )
{
fprintf( stderr, " string=%p,", req->string );
fprintf( stderr, " unicode=%d,", req->unicode );
fprintf( stderr, " length=%d", req->length );
}
static void dump_continue_debug_event_request( const struct continue_debug_event_request *req )
{
fprintf( stderr, " pid=%p,", req->pid );
@ -1310,7 +1326,8 @@ static const dump_func req_dumpers[REQ_NB_REQUESTS] = {
(dump_func)dump_create_snapshot_request,
(dump_func)dump_next_process_request,
(dump_func)dump_wait_debug_event_request,
(dump_func)dump_send_debug_event_request,
(dump_func)dump_exception_event_request,
(dump_func)dump_output_debug_string_request,
(dump_func)dump_continue_debug_event_request,
(dump_func)dump_debug_process_request,
(dump_func)dump_read_process_memory_request,
@ -1411,7 +1428,8 @@ static const dump_func reply_dumpers[REQ_NB_REQUESTS] = {
(dump_func)dump_create_snapshot_reply,
(dump_func)dump_next_process_reply,
(dump_func)dump_wait_debug_event_reply,
(dump_func)dump_send_debug_event_reply,
(dump_func)dump_exception_event_reply,
(dump_func)0,
(dump_func)0,
(dump_func)0,
(dump_func)dump_read_process_memory_reply,
@ -1512,7 +1530,8 @@ static const char * const req_names[REQ_NB_REQUESTS] = {
"create_snapshot",
"next_process",
"wait_debug_event",
"send_debug_event",
"exception_event",
"output_debug_string",
"continue_debug_event",
"debug_process",
"read_process_memory",
@ -1546,7 +1565,7 @@ static const char * const req_names[REQ_NB_REQUESTS] = {
/* ### make_requests end ### */
/* Everything above this line is generated automatically by tools/make_requests */
void trace_request( enum request req, int fd )
void trace_request( enum request req )
{
current->last_req = req;
if (req < REQ_NB_REQUESTS)
@ -1556,7 +1575,7 @@ void trace_request( enum request req, int fd )
}
else
fprintf( stderr, "%08x: %d(", (unsigned int)current, req );
if (fd != -1) fprintf( stderr, " ) fd=%d\n", fd );
if (current->pass_fd != -1) fprintf( stderr, " ) fd=%d\n", current->pass_fd );
else fprintf( stderr, " )\n" );
}

9
tools/make_requests
View File

@ -18,6 +18,7 @@
"path_t" => "&dump_path_t",
"debug_event_t" => "&dump_debug_event_t",
"CONTEXT" => "&dump_context",
"EXCEPTION_RECORD" => "&dump_exc_record",
"char[1]" => "\\\"%s\\\"",
"WCHAR[1]" => "&dump_unicode_string"
);
@ -80,13 +81,11 @@ my @request_lines = ();
foreach $req (@requests) { push @request_lines, "DECL_HANDLER($req);\n"; }
push @request_lines, "\n#ifdef WANT_REQUEST_HANDLERS\n\n";
push @request_lines, "static const struct handler {\n";
push @request_lines, " void (*handler)( void *req, int fd );\n";
push @request_lines, " unsigned int min_size;\n";
push @request_lines, "} req_handlers[REQ_NB_REQUESTS] = {\n";
push @request_lines, "typedef void (*req_handler)( void *req );\n";
push @request_lines, "static const req_handler req_handlers[REQ_NB_REQUESTS] =\n{\n";
foreach $req (@requests)
{
push @request_lines, " { (void(*)())req_$req, sizeof(struct ${req}_request) },\n";
push @request_lines, " (req_handler)req_$req,\n";
}
push @request_lines, "};\n#endif /* WANT_REQUEST_HANDLERS */\n";

13
win32/except.c
View File

@ -34,9 +34,10 @@
#include "process.h"
#include "thread.h"
#include "stackframe.h"
#include "server.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(seh)
DEFAULT_DEBUG_CHANNEL(seh);
/*******************************************************************
@ -69,12 +70,16 @@ void WINAPI RaiseException( DWORD code, DWORD flags, DWORD nbargs, const LPDWORD
*/
DWORD WINAPI UnhandledExceptionFilter(PEXCEPTION_POINTERS epointers)
{
struct exception_event_request *req = get_req_buffer();
char message[80];
PDB *pdb = PROCESS_Current();
if (DEBUG_SendExceptionEvent( epointers->ExceptionRecord, FALSE,
epointers->ContextRecord ) == DBG_CONTINUE)
return EXCEPTION_CONTINUE_EXECUTION;
/* send a last chance event to the debugger */
req->record = *epointers->ExceptionRecord;
req->first = 0;
req->context = *epointers->ContextRecord;
if (!server_call_noerr( REQ_EXCEPTION_EVENT )) *epointers->ContextRecord = req->context;
if (req->status == DBG_CONTINUE) return EXCEPTION_CONTINUE_EXECUTION;
if (pdb->top_filter)
{