Set thread start address to 0 on events generated by

DebugActiveProcess.
Return a correct address in the simulated exception event.

server/context_i386.c

@@ -458,6 +458,19 @@ static void copy_context( CONTEXT *to, CONTEXT *from, int flags )
     /* always need to be accessed by ptrace anyway */
 }
 
+/* retrieve the current instruction pointer of a thread */
+void *get_thread_ip( struct thread *thread )
+{
+    CONTEXT context;
+    context.Eip = 0;
+    if (suspend_for_ptrace( thread ))
+    {
+        get_thread_context( thread, CONTEXT_CONTROL, &context );
+        resume_thread( thread );
+    }
+    return (void *)context.Eip;
+}
+
 /* retrieve the current context of a thread */
 DECL_HANDLER(get_thread_context)
 {

server/debugger.c

@@ -94,7 +94,7 @@ static int fill_exception_event( struct debug_event *event, void *arg )
 static int fill_create_thread_event( struct debug_event *event, void *arg )
 {
     struct process *debugger = event->debugger->process;
-    struct thread *thread = arg;
+    struct thread *thread = event->sender;
     int handle;
     
     /* documented: THREAD_GET_CONTEXT | THREAD_SET_CONTEXT | THREAD_SUSPEND_RESUME */
@@ -102,15 +102,15 @@ static int fill_create_thread_event( struct debug_event *event, void *arg )
         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;
+    event->data.info.create_thread.start  = arg;
     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 = event->sender;
-    struct thread *thread = process->thread_list;
+    struct process *process = thread->process;
     int handle;
 
     /* documented: PROCESS_VM_READ | PROCESS_VM_WRITE */
@@ -138,7 +138,7 @@ static int fill_create_process_event( struct debug_event *event, void *arg )
     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.start      = arg;
     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;
@@ -472,15 +472,15 @@ static int debugger_attach( struct process *process, struct thread *debugger )
 }
 
 /* generate all startup events of a given process */
-void generate_startup_debug_events( struct process *process )
+void generate_startup_debug_events( struct process *process, void *entry )
 {
     struct process_dll *dll;
     struct thread *thread = process->thread_list;
 
     /* generate creation events */
-    generate_debug_event( thread, CREATE_PROCESS_DEBUG_EVENT, process );
+    generate_debug_event( thread, CREATE_PROCESS_DEBUG_EVENT, entry );
     while ((thread = thread->proc_next))
-        generate_debug_event( thread, CREATE_THREAD_DEBUG_EVENT, thread );
+        generate_debug_event( thread, CREATE_THREAD_DEBUG_EVENT, NULL );
 
     /* generate dll events (in loading order, i.e. reverse list order) */
     for (dll = &process->exe; dll->next; dll = dll->next);
@@ -559,13 +559,13 @@ DECL_HANDLER(debug_process)
 
     if (debugger_attach( process, current ))
     {
-        generate_startup_debug_events( process );
+        generate_startup_debug_events( process, NULL );
         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.ExceptionAddress = get_thread_ip( process->thread_list );
         data.record.NumberParameters = 0;
         data.first = 1;
         if ((event = queue_debug_event( process->thread_list, EXCEPTION_DEBUG_EVENT, &data )))

server/main.c

@@ -86,6 +86,7 @@ int main( int argc, char *argv[] )
     parse_args( argc, argv );
     signal_init();
     open_master_socket();
+    setvbuf( stderr, NULL, _IOLBF, 0 );
 
     if (debug_level) fprintf( stderr, "Server: starting (pid=%ld)\n", (long) getpid() );
     select_loop();

server/object.h

@@ -155,7 +155,7 @@ extern int free_console( struct process *process );
 
 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 generate_startup_debug_events( struct process *process, void *entry );
 extern void debug_exit_thread( struct thread *thread );
 
 /* mapping functions */

server/process.c

@@ -656,9 +656,8 @@ DECL_HANDLER(init_process_done)
         fatal_protocol_error( current, "init_process_done: no event\n" );
         return;
     }
-    current->entry    = req->entry;
     process->exe.base = req->module;
-    generate_startup_debug_events( current->process );
+    generate_startup_debug_events( current->process, req->entry );
     set_event( process->init_event );
     release_object( process->init_event );
     process->init_event = NULL;

server/thread.c

@@ -635,10 +635,9 @@ DECL_HANDLER(init_thread)
     }
     current->unix_pid = req->unix_pid;
     current->teb      = req->teb;
-    current->entry    = req->entry;
     if (current->suspend + current->process->suspend > 0) stop_thread( current );
     if (current->process->running_threads > 1)
-        generate_debug_event( current, CREATE_THREAD_DEBUG_EVENT, current );
+        generate_debug_event( current, CREATE_THREAD_DEBUG_EVENT, req->entry );
 }
 
 /* terminate a thread */

server/thread.h

@@ -49,7 +49,6 @@ struct thread
     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 */
     int                 affinity;  /* affinity mask */
     int                 suspend;   /* suspend count */
@@ -89,6 +88,7 @@ extern void detach_thread( struct thread *thread, int sig );
 extern int suspend_for_ptrace( struct thread *thread );
 extern int read_thread_int( struct thread *thread, const int *addr, int *data );
 extern int write_thread_int( struct thread *thread, int *addr, int data, unsigned int mask );
+extern void *get_thread_ip( struct thread *thread );
 
 
 static inline int get_error(void)       { return current->error; }