debug-compile-event.js revision 402d937239b0e2fd11bf2f4fe972ad78aa9fd481 
1// Copyright 2009 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Flags: --expose-debug-as debug
29// Get the Debug object exposed from the debug context global object.
30Debug = debug.Debug
31
32var exception = false;  // Exception in debug event listener.
33var before_compile_count = 0;
34var after_compile_count = 0;
35var current_source = '';  // Current source being compiled.
36var source_count = 0;  // Total number of scources compiled.
37var host_compilations = 0;  // Number of scources compiled through the API.
38var eval_compilations = 0;  // Number of scources compiled through eval.
39var json_compilations = 0;  // Number of scources compiled through JSON.parse.
40
41
42function compileSource(source) {
43  current_source = source;
44  eval(current_source);
45  source_count++;
46}
47
48
49function listener(event, exec_state, event_data, data) {
50  try {
51    if (event == Debug.DebugEvent.BeforeCompile ||
52        event == Debug.DebugEvent.AfterCompile) {
53      // Count the events.
54      if (event == Debug.DebugEvent.BeforeCompile) {
55        before_compile_count++;
56      } else {
57        after_compile_count++;
58        switch (event_data.script().compilationType()) {
59          case Debug.ScriptCompilationType.Host:
60            host_compilations++;
61            break;
62          case Debug.ScriptCompilationType.Eval:
63            eval_compilations++;
64            break;
65          case Debug.ScriptCompilationType.JSON:
66            json_compilations++;
67            break;
68        }
69      }
70
71      // If the compiled source contains 'eval' there will be additional compile
72      // events for the source inside eval.
73      if (current_source.indexOf('eval') == 0) {
74        // For source with 'eval' there will be compile events with substrings
75        // as well as with with the exact source.
76        assertTrue(current_source.indexOf(event_data.script().source()) >= 0);
77      } else if (current_source.indexOf('JSON.parse') == 0) {
78        // For JSON the JSON source will be in parentheses.
79        var s = event_data.script().source();
80        if (s[0] == '(') {
81          s = s.substring(1, s.length - 2);
82        }
83        assertTrue(current_source.indexOf(s) >= 0);
84      } else {
85        // For source without 'eval' there will be a compile events with the
86        // exact source.
87        assertEquals(current_source, event_data.script().source());
88      }
89      // Check that script context is included into the event message.
90      var json = event_data.toJSONProtocol();
91      var msg = eval('(' + json + ')');
92      assertTrue('context' in msg.body.script);
93
94      // Check that we pick script name from //@ sourceURL, iff present
95      assertEquals(current_source.indexOf('sourceURL') >= 0 ?
96                     'myscript.js' : undefined,
97                   event_data.script().name());
98    }
99  } catch (e) {
100    exception = e
101  }
102};
103
104
105// Add the debug event listener.
106Debug.setListener(listener);
107
108// Compile different sources.
109compileSource('a=1');
110compileSource('(function(){})');
111compileSource('eval("a=2")');
112source_count++;  // Using eval causes additional compilation event.
113compileSource('eval("eval(\'(function(){return a;})\')")');
114source_count += 2;  // Using eval causes additional compilation event.
115compileSource('JSON.parse(\'{"a":1,"b":2}\')');
116source_count++;  // Using JSON.parse causes additional compilation event.
117compileSource('x=1; //@ sourceURL=myscript.js');
118
119// Make sure that the debug event listener was invoked.
120assertFalse(exception, "exception in listener")
121
122// Number of before and after compile events should be the same.
123assertEquals(before_compile_count, after_compile_count);
124
125// Check the actual number of events (no compilation through the API as all
126// source compiled through eval except for one JSON.parse call).
127assertEquals(source_count, after_compile_count);
128assertEquals(0, host_compilations);
129assertEquals(source_count - 1, eval_compilations);
130assertEquals(1, json_compilations);
131
132Debug.setListener(null);
133