Debugger: Use Python instead of GDB/MI to retrieve stack

This will be useful to create artificial QML stack frames.

Change-Id: I41cb87f8dea69d88695fea46a1ae2b0270cbec1a
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

share/qtcreator/debugger/gdbbridge.py

@@ -1696,6 +1696,38 @@ class Dumper(DumperBase):
         return type
 
 
+    def stackListFrames(self, n):
+        self.prepare("options:pe")
+        self.output = []
+
+        frame = gdb.newest_frame()
+        i = 0
+        t1 = 'frame={level="%s",addr="0x%x",func="%s",'
+        t1 += 'file="%s",fullname="%s",line="%s",from="%s"}'
+        while i < n and frame:
+            with OutputSafer(self):
+                name = frame.name()
+                functionName = "??" if name is None else name
+                fileName = ""
+                objfile = ""
+                fullName = ""
+                pc = frame.pc()
+                sal = frame.find_sal()
+                line = -1
+                if sal:
+                    line = sal.line
+                    symtab = sal.symtab
+                    if not symtab is None:
+                        objfile = symtab.objfile.filename
+                        fileName = symtab.filename
+                        fullName = symtab.fullname()
+                self.put(t1 % (i, pc, functionName, fileName, fullName, line, objfile))
+
+            frame = frame.older()
+            i += 1
+
+        return ''.join(self.output)
+
 class CliDumper(Dumper):
     def __init__(self):
         Dumper.__init__(self)
@@ -1871,6 +1903,19 @@ def reloadDumper(arg):
 
 registerCommand("reload", reloadDumper)
 
+#######################################################################
+#
+# StackFrames Command
+#
+#######################################################################
+
+def stackListFrames(arg):
+    args = arg.split(' ')
+    limit = int(args[1]) if len(args) >= 2 else 1000
+    return theDumper.stackListFrames(limit)
+
+registerCommand("stackListFrames", stackListFrames)
+
 #######################################################################
 #
 # Mixed C++/Qml debugging

src/plugins/debugger/gdb/gdbengine.cpp

@@ -1251,7 +1251,7 @@ void GdbEngine::updateAll()
     //PENDING_DEBUG("UPDATING ALL\n");
     QTC_CHECK(state() == InferiorUnrunnable || state() == InferiorStopOk);
     reloadModulesInternal();
-    postCommand("-stack-list-frames", CB(handleStackListFrames),
+    postCommand("stackListFrames", CB(handleStackListFrames),
         QVariant::fromValue<StackCookie>(StackCookie(false, true)));
     stackHandler()->setCurrentIndex(0);
     postCommand("-thread-info", CB(handleThreadInfo), 0);
@@ -3240,7 +3240,7 @@ void GdbEngine::reloadFullStack()
 {
     PENDING_DEBUG("RELOAD FULL STACK");
     resetLocation();
-    postCommand("-stack-list-frames", Discardable, CB(handleStackListFrames),
+    postCommand("stackListFrames", Discardable, CB(handleStackListFrames),
         QVariant::fromValue<StackCookie>(StackCookie(true, true)));
 }
 
@@ -3331,7 +3331,7 @@ void GdbEngine::handleQmlStackTrace(const GdbResponse &response)
 void GdbEngine::reloadStack(bool forceGotoLocation)
 {
     PENDING_DEBUG("RELOAD STACK");
-    QByteArray cmd = "-stack-list-frames";
+    QByteArray cmd = "stackListFrames";
     int stackDepth = action(MaximalStackDepth)->value().toInt();
     if (stackDepth)
         cmd += " 0 " + QByteArray::number(stackDepth);
@@ -3354,8 +3354,10 @@ StackFrame GdbEngine::parseStackFrame(const GdbMi &frameMi, int level)
     frame.line = frameMi["line"].toInt();
     frame.address = frameMi["addr"].toAddress();
     frame.usable = QFileInfo(frame.file).isReadable();
-    if (frameMi["language"].data() == "js")
+    if (frameMi["language"].data() == "js") {
         frame.language = QmlLanguage;
+        frame.fixQmlFrame(startParameters());
+    }
     return frame;
 }
 
@@ -3373,7 +3375,11 @@ void GdbEngine::handleStackListFrames(const GdbResponse &response)
     StackCookie cookie = response.cookie.value<StackCookie>();
     QList<StackFrame> stackFrames;
 
-    GdbMi stack = response.data["stack"];
+    //GdbMi stack = response.data["stack"];
+    QByteArray out = response.consoleStreamOutput;
+    GdbMi stack;
+    stack.fromStringMultiple(out);
+
     if (!stack.isValid()) {
         qDebug() << "FIXME: stack:" << stack.toString();
         return;