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1 package org.python.core;
3
4 class PythonTraceFunction extends TraceFunction
5 {
6 PyObject tracefunc;
7
8 PythonTraceFunction(PyObject tracefunc) {
9 this.tracefunc = tracefunc;
10 }
11
12 private synchronized TraceFunction safeCall(PyFrame frame, String  label,
13 PyObject arg)
14 {
15 ThreadState ts = Py.getThreadState();
16 if (ts.tracing)
17 return null;
18
19 if (tracefunc == null)
20 return null;
21
22 PyObject ret = null;
23 try {
24 ts.tracing = true;
25 ret = tracefunc.__call__(frame, new PyString(label), arg);
26 } catch (PyException exc) {
27 frame.tracefunc = null;
28 ts.systemState.tracefunc = null;
29 ts.systemState.profilefunc = null;
30 throw exc;
31 } finally {
32 ts.tracing = false;
33 }
34 if (ret == tracefunc)
35 return this;
36 if (ret == Py.None)
37 return null;
38 return new PythonTraceFunction(ret);
39 }
40
41 public TraceFunction traceCall(PyFrame frame) {
42 return safeCall(frame, "call", Py.None);
43 }
44
45 public TraceFunction traceReturn(PyFrame frame, PyObject ret) {
46 return safeCall(frame, "return", ret);
47 }
48
49 public TraceFunction traceLine(PyFrame frame, int line) {
50 return safeCall(frame, "line", Py.None);
51 }
52
53 public TraceFunction traceException(PyFrame frame, PyException exc) {
54 return safeCall(frame, "exception",
55 new PyTuple(new PyObject[] {exc.type, exc.value,
56 exc.traceback
57 }));
58 }
59 }
60 |
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