winedbg: Only check for break/watch points on first chance exceptions.

programs/winedbg/break.c

@@ -775,15 +775,22 @@ BOOL break_should_continue(ADDRESS64* addr, DWORD code)
 }
 
 /***********************************************************************
- *           break_ajust_pc
+ *           break_adjust_pc
  *
  * Adjust PC to the address where the trap (if any) actually occurred
  * Also sets dbg_curr_thread->stopped_xpoint
  */
-void break_adjust_pc(ADDRESS64* addr, DWORD code, BOOL* is_break)
+void break_adjust_pc(ADDRESS64* addr, DWORD code, BOOL first_chance, BOOL* is_break)
 {
     DWORD	        oldval = 0;
 
+    /* break / watch points are handled on first chance */
+    if ( !first_chance )
+    {
+        *is_break = TRUE;
+        dbg_curr_thread->stopped_xpoint = -1;
+        return;
+    }
     *is_break = FALSE;
 
     /* If not single-stepping, back up to the break instruction */

programs/winedbg/debugger.h

@@ -288,7 +288,7 @@ extern void             break_delete_xpoint(int num);
 extern void             break_delete_xpoints_from_module(unsigned long base);
 extern void             break_enable_xpoint(int num, BOOL enable);
 extern void             break_info(void);
-extern void             break_adjust_pc(ADDRESS64* addr, DWORD code, BOOL* is_break);
+extern void             break_adjust_pc(ADDRESS64* addr, DWORD code, BOOL first_chance, BOOL* is_break);
 extern BOOL             break_should_continue(ADDRESS64* addr, DWORD code);
 extern void             break_suspend_execution(void);
 extern void             break_restart_execution(int count);

programs/winedbg/tgt_active.c

@@ -107,7 +107,14 @@ static unsigned dbg_fetch_context(void)
     return TRUE;
 }
 
-static unsigned dbg_exception_prolog(BOOL is_debug, const EXCEPTION_RECORD* rec)
+/***********************************************************************
+ *              dbg_exception_prolog
+ *
+ * Examine exception and decide if interactive mode is entered(return TRUE)
+ * or exception is silently continued(return FALSE)
+ * is_debug means the exception is a breakpoint or single step exception
+ */
+static unsigned dbg_exception_prolog(BOOL is_debug, BOOL first_chance, const EXCEPTION_RECORD* rec)
 {
     ADDRESS64   addr;
     BOOL        is_break;
@@ -143,7 +150,7 @@ static unsigned dbg_exception_prolog(BOOL is_debug, const EXCEPTION_RECORD* rec)
     /* this will resynchronize builtin dbghelp's internal ELF module list */
     SymLoadModule(dbg_curr_process->handle, 0, 0, 0, 0, 0);
 
-    if (is_debug) break_adjust_pc(&addr, rec->ExceptionCode, &is_break);
+    if (is_debug) break_adjust_pc(&addr, rec->ExceptionCode, first_chance, &is_break);
     /*
      * Do a quiet backtrace so that we have an idea of what the situation
      * is WRT the source files.
@@ -398,7 +405,7 @@ static DWORD dbg_handle_exception(const EXCEPTION_RECORD* rec, BOOL first_chance
         dbg_printf( ", invalid program stack" );
     }
 
-    if (dbg_exception_prolog(is_debug, rec))
+    if (dbg_exception_prolog(is_debug, first_chance, rec))
     {
 	dbg_interactiveP = TRUE;
         return 0;