v8/test/mjsunit/debug-backtrace.js
mstarzinger 10dd9ce8be Make compilers agree on source position of thrown errors.
This makes the compilers agree on the source position of a message
generated by "throw new Error()", it points to the beginning of the
throw directive.

R=titzer@chromium.org
TEST=message/regress/regress-3995
BUG=v8:3995
LOG=N

Review URL: https://codereview.chromium.org/1049703002

Cr-Commit-Position: refs/heads/master@{#27775}
2015-04-13 09:02:48 +00:00

272 lines
11 KiB
JavaScript

// Copyright 2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --expose-debug-as debug
// The functions used for testing backtraces. They are at the top to make the
// testing of source line/column easier.
function f(x, y) {
a=1;
};
var m = function() {
new f(1);
};
function g() {
m();
};
// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug
listenerCalled = false;
exception = false;
function ParsedResponse(json) {
this.response_ = eval('(' + json + ')');
this.refs_ = [];
if (this.response_.refs) {
for (var i = 0; i < this.response_.refs.length; i++) {
this.refs_[this.response_.refs[i].handle] = this.response_.refs[i];
}
}
}
ParsedResponse.prototype.response = function() {
return this.response_;
}
ParsedResponse.prototype.body = function() {
return this.response_.body;
}
ParsedResponse.prototype.running = function() {
return this.response_.running;
}
ParsedResponse.prototype.lookup = function(handle) {
return this.refs_[handle];
}
function listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Break) {
// The expected backtrace is
// 0: f
// 1: m
// 2: g
// 3: [anonymous]
var response;
var backtrace;
var frame;
var source;
var dcp;
// New copy of debug command processor paused state.
dcp = exec_state.debugCommandProcessor(false);
// Get the backtrace.
var json;
json = '{"seq":0,"type":"request","command":"backtrace"}'
var resp = dcp.processDebugJSONRequest(json);
response = new ParsedResponse(resp);
backtrace = response.body();
assertEquals(0, backtrace.fromFrame);
assertEquals(4, backtrace.toFrame);
assertEquals(4, backtrace.totalFrames);
var frames = backtrace.frames;
assertEquals(4, frames.length);
for (var i = 0; i < frames.length; i++) {
assertEquals('frame', frames[i].type);
}
assertEquals(0, frames[0].index);
assertEquals("f", response.lookup(frames[0].func.ref).name);
assertEquals(1, frames[1].index);
assertEquals("", response.lookup(frames[1].func.ref).name);
assertEquals("m", response.lookup(frames[1].func.ref).inferredName);
assertEquals(2, frames[2].index);
assertEquals("g", response.lookup(frames[2].func.ref).name);
assertEquals(3, frames[3].index);
assertEquals("", response.lookup(frames[3].func.ref).name);
assertFalse(response.running(), "expected not running");
// Get backtrace with two frames.
json = '{"seq":0,"type":"request","command":"backtrace","arguments":{"fromFrame":1,"toFrame":3}}'
response = new ParsedResponse(dcp.processDebugJSONRequest(json));
backtrace = response.body();
assertEquals(1, backtrace.fromFrame);
assertEquals(3, backtrace.toFrame);
assertEquals(4, backtrace.totalFrames);
var frames = backtrace.frames;
assertEquals(2, frames.length);
for (var i = 0; i < frames.length; i++) {
assertEquals('frame', frames[i].type);
}
assertEquals(1, frames[0].index);
assertEquals("", response.lookup(frames[0].func.ref).name);
assertEquals("m", response.lookup(frames[0].func.ref).inferredName);
assertEquals(2, frames[1].index);
assertEquals("g", response.lookup(frames[1].func.ref).name);
// Get backtrace with bottom two frames.
json = '{"seq":0,"type":"request","command":"backtrace","arguments":{"fromFrame":0,"toFrame":2, "bottom":true}}'
response = new ParsedResponse(dcp.processDebugJSONRequest(json));
backtrace = response.body();
assertEquals(2, backtrace.fromFrame);
assertEquals(4, backtrace.toFrame);
assertEquals(4, backtrace.totalFrames);
var frames = backtrace.frames;
assertEquals(2, frames.length);
for (var i = 0; i < frames.length; i++) {
assertEquals('frame', frames[i].type);
}
assertEquals(2, frames[0].index);
assertEquals("g", response.lookup(frames[0].func.ref).name);
assertEquals(3, frames[1].index);
assertEquals("", response.lookup(frames[1].func.ref).name);
// Get the individual frames.
json = '{"seq":0,"type":"request","command":"frame"}'
response = new ParsedResponse(dcp.processDebugJSONRequest(json));
frame = response.body();
assertEquals(0, frame.index);
assertEquals("f", response.lookup(frame.func.ref).name);
assertTrue(frame.constructCall);
assertEquals(31, frame.line);
assertEquals(3, frame.column);
assertEquals(2, frame.arguments.length);
assertEquals('x', frame.arguments[0].name);
assertEquals('number', response.lookup(frame.arguments[0].value.ref).type);
assertEquals(1, response.lookup(frame.arguments[0].value.ref).value);
assertEquals('y', frame.arguments[1].name);
assertEquals('undefined', response.lookup(frame.arguments[1].value.ref).type);
json = '{"seq":0,"type":"request","command":"frame","arguments":{"number":0}}'
response = new ParsedResponse(dcp.processDebugJSONRequest(json));
frame = response.body();
assertEquals(0, frame.index);
assertEquals("f", response.lookup(frame.func.ref).name);
assertEquals(31, frame.line);
assertEquals(3, frame.column);
assertEquals(2, frame.arguments.length);
assertEquals('x', frame.arguments[0].name);
assertEquals('number', response.lookup(frame.arguments[0].value.ref).type);
assertEquals(1, response.lookup(frame.arguments[0].value.ref).value);
assertEquals('y', frame.arguments[1].name);
assertEquals('undefined', response.lookup(frame.arguments[1].value.ref).type);
json = '{"seq":0,"type":"request","command":"frame","arguments":{"number":1}}'
response = new ParsedResponse(dcp.processDebugJSONRequest(json));
frame = response.body();
assertEquals(1, frame.index);
assertEquals("", response.lookup(frame.func.ref).name);
assertEquals("m", response.lookup(frame.func.ref).inferredName);
assertFalse(frame.constructCall);
assertEquals(35, frame.line);
assertEquals(2, frame.column);
assertEquals(0, frame.arguments.length);
json = '{"seq":0,"type":"request","command":"frame","arguments":{"number":3}}'
response = new ParsedResponse(dcp.processDebugJSONRequest(json));
frame = response.body();
assertEquals(3, frame.index);
assertEquals("", response.lookup(frame.func.ref).name);
// Source slices for the individual frames (they all refer to this script).
json = '{"seq":0,"type":"request","command":"source",' +
'"arguments":{"frame":0,"fromLine":30,"toLine":32}}'
response = new ParsedResponse(dcp.processDebugJSONRequest(json));
source = response.body();
assertEquals("function f(x, y) {", source.source.substring(0, 18));
assertEquals(30, source.fromLine);
assertEquals(32, source.toLine);
json = '{"seq":0,"type":"request","command":"source",' +
'"arguments":{"frame":1,"fromLine":31,"toLine":32}}'
response = new ParsedResponse(dcp.processDebugJSONRequest(json));
source = response.body();
assertEquals(" a=1;", source.source.substring(0, 6));
assertEquals(31, source.fromLine);
assertEquals(32, source.toLine);
json = '{"seq":0,"type":"request","command":"source",' +
'"arguments":{"frame":2,"fromLine":35,"toLine":36}}'
response = new ParsedResponse(dcp.processDebugJSONRequest(json));
source = response.body();
assertEquals(" new f(1);", source.source.substring(0, 11));
assertEquals(35, source.fromLine);
assertEquals(36, source.toLine);
// Test line interval way beyond this script will result in an error.
json = '{"seq":0,"type":"request","command":"source",' +
'"arguments":{"frame":0,"fromLine":10000,"toLine":20000}}'
response = new ParsedResponse(dcp.processDebugJSONRequest(json));
assertFalse(response.response().success);
// Test without arguments.
json = '{"seq":0,"type":"request","command":"source"}'
response = new ParsedResponse(dcp.processDebugJSONRequest(json));
source = response.body();
assertEquals(Debug.findScript(f).source, source.source);
// New copy of debug command processor in running state.
dcp = exec_state.debugCommandProcessor(true);
// Get the backtrace.
json = '{"seq":0,"type":"request","command":"backtrace"}'
resp = dcp.processDebugJSONRequest(json);
response = new ParsedResponse(resp);
// It might be argueable, but we expect response to have body when
// not suspended
assertTrue(!!response.body(), "response should be null");
assertTrue(response.running(), "expected running");
listenerCalled = true;
}
} catch (e) {
exception = e
};
};
// Add the debug event listener.
Debug.setListener(listener);
// Set a break point and call to invoke the debug event listener.
Debug.setBreakPoint(f, 0, 0);
g();
// Make sure that the debug event listener vas invoked.
assertFalse(exception, "exception in listener");
assertTrue(listenerCalled);