[quickjs] More debugger work

oden-js-sys/quickjs/quickjs.c

@@ -1018,6 +1018,11 @@ typedef struct JSBreakpoint {
     JS_BOOL enabled;
 } JSBreakpoint;
 
+typedef struct JSDebugContext {
+    JSContext *ctx;
+    JSStackFrame *sf;
+} JSDebugContext;
+
 static int JS_InitAtoms(JSRuntime *rt);
 static JSAtom __JS_NewAtomInit(JSRuntime *rt, const char *str, int len,
                                int atom_type);
@@ -6503,6 +6508,7 @@ static void get_frame_debug_position(JSContext *ctx, JSStackFrame *sf,
 
     *backtrace_barrier = FALSE;
     *function = get_func_name(ctx, sf->cur_func);
+
     p = JS_VALUE_GET_OBJ(sf->cur_func);    
     if (js_class_has_bytecode(p->class_id)) {
         JSFunctionBytecode *b;
@@ -6510,7 +6516,6 @@ static void get_frame_debug_position(JSContext *ctx, JSStackFrame *sf,
 
         b = p->u.func.function_bytecode;
         *backtrace_barrier = b->backtrace_barrier;
-        *function = JS_AtomToCString(ctx, b->func_name);
         if (b->has_debug) {
             line_num1 = find_line_num(ctx, b, sf->cur_pc - b->byte_code_buf - 1);
 
@@ -33775,6 +33780,24 @@ static JSValue __JS_EvalInternal(JSContext *ctx, JSValueConst this_obj,
             goto fail1;
         fun_obj = JS_DupValue(ctx, JS_MKPTR(JS_TAG_MODULE, m));
     }
+
+    if (ctx->rt->debug_callback) {
+        JSDebugContext dctx;
+        dctx.ctx = ctx;
+        dctx.sf = sf;
+
+        JSDebugEvent evt;
+        evt.reason = JS_BREAK_CODE_LOADED;
+        evt.u.loaded.filename = filename;
+        
+        /* TODO: Handle the step/resume/what-have-you. Step from here will
+           be complicated because the function we need to step into will be
+           the one we just parsed, kinda- unless it's a module? Even then
+           it's not clear where the break will go if we're loading a
+           module... yikes. */
+        /* resume = */ctx->rt->debug_callback(&dctx, &evt, ctx->rt->debug_opaque);
+    }
+    
     if (flags & JS_EVAL_FLAG_COMPILE_ONLY) {
         ret_val = fun_obj;
     } else {
@@ -54147,6 +54170,12 @@ void JS_SetSourceMapFunc(JSRuntime *rt, JSMapSourceFunc *map_func, void *opaque)
 
 /* Debugger */
 
+void JS_SetDebugCallbackFunc(JSRuntime *rt, JSDebugCallbackFunc *func, void *opaque)
+{
+    rt->debug_callback = func;
+    rt->debug_opaque = opaque;
+}
+
 static BOOL find_pc_offset(JSFunctionBytecode *b, int target_line, int *break_pc, int *actual_line)
 {
     const uint8_t *p_end, *p;
@@ -54199,7 +54228,8 @@ static BOOL find_pc_offset(JSFunctionBytecode *b, int target_line, int *break_pc
     return FALSE;
 }
 
-static JSBreakpoint *find_existing_breakpoint(JSContext *ctx, JSFunctionBytecode *func, int pc) {
+static JSBreakpoint *find_existing_breakpoint(JSContext *ctx, JSFunctionBytecode *func, int pc)
+{
     struct list_head *el;
     list_for_each(el, &ctx->rt->breakpoint_list) {
         JSBreakpoint *bp = list_entry(el, JSBreakpoint, link);
@@ -54210,12 +54240,8 @@ static JSBreakpoint *find_existing_breakpoint(JSContext *ctx, JSFunctionBytecode
     return NULL;
 }
 
-typedef struct JSDebugContext {
-    JSContext *ctx;
-    JSStackFrame *sf;
-} JSDebugContext;
-
-static int js_handle_breakpoint(JSContext *ctx, JSFunctionBytecode *b, int code_offset) {
+static int js_handle_breakpoint(JSContext *ctx, JSFunctionBytecode *b, int code_offset)
+{
     int next_op;
     /* JSResumeMode resume = JS_RESUME_MODE_CONTINUE; */
     JSRuntime *rt = ctx->rt;
@@ -54227,7 +54253,11 @@ static int js_handle_breakpoint(JSContext *ctx, JSFunctionBytecode *b, int code_
                 dctx.ctx = ctx;
                 dctx.sf = ctx->rt->current_stack_frame;
 
-                /* resume = */rt->debug_callback(&dctx, JS_BREAK_BREAKPOINT, bp, rt->debug_opaque);
+                JSDebugEvent evt;
+                evt.reason = JS_BREAK_BREAKPOINT;
+                evt.u.breakpoint = bp;
+                
+                /* resume = */rt->debug_callback(&dctx, &evt, rt->debug_opaque);
             }
         }
         next_op = bp->replaced_byte;
@@ -54241,8 +54271,11 @@ static int js_handle_breakpoint(JSContext *ctx, JSFunctionBytecode *b, int code_
             JSDebugContext dctx;
             dctx.ctx = ctx;
             dctx.sf = ctx->rt->current_stack_frame;
+
+            JSDebugEvent evt;
+            evt.reason = JS_BREAK_STEP;
             
-            /* resume = */rt->debug_callback(&dctx, JS_BREAK_STEP, NULL, rt->debug_opaque);
+            /* resume = */rt->debug_callback(&dctx, &evt, rt->debug_opaque);
         }
     }
     
@@ -54271,7 +54304,7 @@ void JS_DebugGetFrameSourcePosition(JSDebugContext *dctx, JSDebugFrame *frame,
     JSStackFrame *sf = (JSStackFrame *)frame;
     JSContext *ctx = dctx->ctx;
     BOOL backtrace_barrier;
-    
+
     get_frame_debug_position(ctx, sf, function, file, line, &backtrace_barrier);
 }
 

oden-js-sys/quickjs/quickjs.h

@@ -1070,15 +1070,25 @@ typedef enum JSResumeMode {
 } JSResumeMode;
 
 typedef enum JSBreakReason {
+    JS_BREAK_CODE_LOADED,
     JS_BREAK_BREAKPOINT,
     JS_BREAK_STEP,
 } JSBreakReason;
 
 typedef struct JSBreakpoint JSBreakpoint;
 
+typedef struct JSDebugEvent {
+    JSBreakReason reason;
+    union {
+        struct {
+            const char *filename;
+        } loaded;
+        JSBreakpoint *breakpoint;
+    } u;
+} JSDebugEvent;
+
 typedef JSResumeMode JSDebugCallbackFunc(JSDebugContext *ctx,
-                                         JSBreakReason reason,
-                                         JSBreakpoint *breakpoint,
+                                         JSDebugEvent *event,
                                          void *opaque);
 void JS_SetDebugCallbackFunc(JSRuntime *rt, JSDebugCallbackFunc *bp_func,
                              void *opqaue);