Changeset 7786 in webkit for trunk/JavaScriptCore/kjs/object.cpp

Timestamp:

Oct 7, 2004, 2:30:47 PM (21 years ago)

Author:

rjw

Message:

Added simple JavaScript call tracing. Very useful for
debugging complex pages.

Tracing is only available in development builds and is
enabled by:

(gdb) set traceJavaScript = 1

or programatically

setTraceJavaScript(true)

Function, args, and return values are printed to console. Very
verbose.

Reviewed by Ken.

• kjs/function_object.cpp: (FunctionProtoFuncImp::call):
• kjs/object.cpp: (KJS::Object::call):

File:

• trunk/JavaScriptCore/kjs/object.cpp (modified) (3 diffs)

trunk/JavaScriptCore/kjs/object.cpp

@@ -40 +40 @@
 #include "nodes.h"
 
+#ifndef NDEBUG
+#define JAVASCRIPT_CALL_TRACING Yes
+#endif
+
+#ifdef JAVASCRIPT_CALL_TRACING
+static bool traceJavaScript = false;
+
+extern "C" {
+    void setTraceJavaScript(bool f)
+    {
+        traceJavaScript = f;
+    }
+
+    static bool traceJavaScript()
+    {
+        return traceJavaScript;
+    }
+}
+#endif
+
 namespace KJS {
 
@@ -57 +77 @@
 #if KJS_MAX_STACK > 0
   static int depth = 0; // sum of all concurrent interpreters
+
+#ifdef JAVASCRIPT_CALL_TRACING
+    static bool tracing = false;
+    if (javaScriptTrace() && !tracing) {
+        tracing = true;
+        for (int i = 0; i < depth; i++)
+            putchar (' ');
+        printf ("*** calling:  %s\n", toString(exec).ascii());
+        for (int j = 0; j < args.size(); j++) {
+            for (int i = 0; i < depth; i++)
+                putchar (' ');
+            printf ("*** arg[%d] = %s\n", j, args[j].toString(exec).ascii());
+        }
+        tracing = false;
+    }
+#endif
+
   if (++depth > KJS_MAX_STACK) {
     --depth;
@@ -70 +107 @@
 #if KJS_MAX_STACK > 0
   --depth;
+#endif
+
+#ifdef JAVASCRIPT_CALL_TRACING
+    if (javaScriptTrace() && !tracing) {
+        tracing = true;
+        for (int i = 0; i < depth; i++)
+            putchar (' ');
+        printf ("*** returning:  %s\n", ret.toString(exec).ascii());
+        tracing = false;
+    }
 #endif