Support stepping into getters and setters.

Related Chromium bug:
http://code.google.com/p/chromium/issues/detail?id=16427

Review URL: http://codereview.chromium.org/149542

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2458 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
yurys@chromium.org 2009-07-14 16:55:32 +00:00
parent 894af58c82
commit cc6be014dc
4 changed files with 289 additions and 6 deletions

View File

@ -334,8 +334,11 @@ void BreakLocationIterator::PrepareStepIn() {
rinfo()->set_target_address(stub->entry());
}
} else {
// Step in through constructs call requires no changes to the running code.
ASSERT(RelocInfo::IsConstructCall(rmode()));
// Step in through construct call requires no changes to the running code.
// Step in through getters/setters should already be prepared as well
// because caller of this function (Debug::PrepareStep) is expected to
// flood the top frame's function with one shot breakpoints.
ASSERT(RelocInfo::IsConstructCall(rmode()) || code->is_inline_cache_stub());
}
}
@ -1087,10 +1090,18 @@ void Debug::PrepareStep(StepAction step_action, int step_count) {
// Compute whether or not the target is a call target.
bool is_call_target = false;
bool is_load_or_store = false;
bool is_inline_cache_stub = false;
if (RelocInfo::IsCodeTarget(it.rinfo()->rmode())) {
Address target = it.rinfo()->target_address();
Code* code = Code::GetCodeFromTargetAddress(target);
if (code->is_call_stub()) is_call_target = true;
if (code->is_call_stub()) {
is_call_target = true;
}
if (code->is_inline_cache_stub()) {
is_inline_cache_stub = true;
is_load_or_store = !is_call_target;
}
}
// If this is the last break code target step out is the only possibility.
@ -1103,8 +1114,8 @@ void Debug::PrepareStep(StepAction step_action, int step_count) {
JSFunction* function = JSFunction::cast(frames_it.frame()->function());
FloodWithOneShot(Handle<SharedFunctionInfo>(function->shared()));
}
} else if (!(is_call_target || RelocInfo::IsConstructCall(it.rmode())) ||
step_action == StepNext || step_action == StepMin) {
} else if (!(is_inline_cache_stub || RelocInfo::IsConstructCall(it.rmode()))
|| step_action == StepNext || step_action == StepMin) {
// Step next or step min.
// Fill the current function with one-shot break points.
@ -1117,9 +1128,20 @@ void Debug::PrepareStep(StepAction step_action, int step_count) {
} else {
// Fill the current function with one-shot break points even for step in on
// a call target as the function called might be a native function for
// which step in will not stop.
// which step in will not stop. It also prepares for stepping in
// getters/setters.
FloodWithOneShot(shared);
if (is_load_or_store) {
// Remember source position and frame to handle step in getter/setter. If
// there is a custom getter/setter it will be handled in
// Object::Get/SetPropertyWithCallback, otherwise the step action will be
// propagated on the next Debug::Break.
thread_local_.last_statement_position_ =
debug_info->code()->SourceStatementPosition(frame->pc());
thread_local_.last_fp_ = frame->fp();
}
// Step in or Step in min
it.PrepareStepIn();
ActivateStepIn(frame);

View File

@ -216,6 +216,12 @@ Object* Object::GetPropertyWithDefinedGetter(Object* receiver,
HandleScope scope;
Handle<JSFunction> fun(JSFunction::cast(getter));
Handle<Object> self(receiver);
#ifdef ENABLE_DEBUGGER_SUPPORT
// Handle stepping into a getter if step into is active.
if (Debug::StepInActive()) {
Debug::HandleStepIn(fun, Handle<Object>::null(), 0, false);
}
#endif
bool has_pending_exception;
Handle<Object> result =
Execution::Call(fun, self, 0, NULL, &has_pending_exception);
@ -1624,6 +1630,12 @@ Object* JSObject::SetPropertyWithDefinedSetter(JSFunction* setter,
Handle<Object> value_handle(value);
Handle<JSFunction> fun(JSFunction::cast(setter));
Handle<JSObject> self(this);
#ifdef ENABLE_DEBUGGER_SUPPORT
// Handle stepping into a setter if step into is active.
if (Debug::StepInActive()) {
Debug::HandleStepIn(fun, Handle<Object>::null(), 0, false);
}
#endif
bool has_pending_exception;
Object** argv[] = { value_handle.location() };
Execution::Call(fun, self, 1, argv, &has_pending_exception);

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@ -0,0 +1,248 @@
// 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
// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug
var exception = null;
var state = 1;
var expected_source_line_text = null;
var expected_function_name = null;
// Simple debug event handler which first time will cause 'step in' action
// to get into g.call and than check that execution is pauesed inside
// function 'g'.
function listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Break) {
if (state == 1) {
exec_state.prepareStep(Debug.StepAction.StepIn, 2);
state = 2;
} else if (state == 2) {
assertEquals(expected_source_line_text,
event_data.sourceLineText());
assertEquals(expected_function_name, event_data.func().name());
state = 3;
}
}
} catch(e) {
exception = e;
}
};
// Add the debug event listener.
Debug.setListener(listener);
var c = {
name: 'name ',
get getter1() {
return this.name; // getter 1
},
get getter2() {
return { // getter 2
'a': c.name
};
},
set setter1(n) {
this.name = n; // setter 1
}
};
c.__defineGetter__('y', function getterY() {
return this.name; // getter y
});
c.__defineGetter__(3, function getter3() {
return this.name; // getter 3
});
c.__defineSetter__('y', function setterY(n) {
this.name = n; // setter y
});
c.__defineSetter__(3, function setter3(n) {
this.name = n; // setter 3
});
var d = {
'c': c,
};
function testGetter1_1() {
expected_function_name = 'getter1';
expected_source_line_text = ' return this.name; // getter 1';
debugger;
var x = c.getter1;
}
function testGetter1_2() {
expected_function_name = 'getter1';
expected_source_line_text = ' return this.name; // getter 1';
debugger;
var x = c['getter1'];
}
function testGetter1_3() {
expected_function_name = 'getter1';
expected_source_line_text = ' return this.name; // getter 1';
debugger;
for (var i = 1; i < 2; i++) {
var x = c['getter' + i];
}
}
function testGetter1_4() {
expected_function_name = 'getter1';
expected_source_line_text = ' return this.name; // getter 1';
debugger;
var x = d.c.getter1;
}
function testGetter1_5() {
expected_function_name = 'getter1';
expected_source_line_text = ' return this.name; // getter 1';
for (var i = 2; i != 1; i--);
debugger;
var x = d.c['getter' + i];
}
function testGetter2_1() {
expected_function_name = 'getter2';
expected_source_line_text = ' return { // getter 2';
for (var i = 2; i != 1; i--);
debugger;
var t = d.c.getter2.name;
}
function testGetterY_1() {
expected_function_name = 'getterY';
expected_source_line_text = ' return this.name; // getter y';
debugger;
var t = d.c.y;
}
function testIndexedGetter3_1() {
expected_function_name = 'getter3';
expected_source_line_text = ' return this.name; // getter 3';
debugger;
var r = d.c[3];
}
function testSetterY_1() {
expected_function_name = 'setterY';
expected_source_line_text = ' this.name = n; // setter y';
debugger;
d.c.y = 'www';
}
function testIndexedSetter3_1() {
expected_function_name = 'setter3';
expected_source_line_text = ' this.name = n; // setter 3';
var i = 3
debugger;
d.c[3] = 'www';
}
function testSetter1_1() {
expected_function_name = 'setter1';
expected_source_line_text = ' this.name = n; // setter 1';
debugger;
d.c.setter1 = 'aa';
}
function testSetter1_2() {
expected_function_name = 'setter1';
expected_source_line_text = ' this.name = n; // setter 1';
debugger;
d.c['setter1'] = 'bb';
}
function testSetter1_3() {
expected_function_name = 'setter1';
expected_source_line_text = ' this.name = n; // setter 1';
for (var i = 2; i != 1; i--);
debugger;
d.c['setter' + i] = i;
}
var e = {
name: 'e'
};
e.__proto__ = c;
function testProtoGetter1_1() {
expected_function_name = 'getter1';
expected_source_line_text = ' return this.name; // getter 1';
debugger;
var x = e.getter1;
}
function testProtoSetter1_1() {
expected_function_name = 'setter1';
expected_source_line_text = ' this.name = n; // setter 1';
debugger;
e.setter1 = 'aa';
}
function testProtoIndexedGetter3_1() {
expected_function_name = 'getter3';
expected_source_line_text = ' return this.name; // getter 3';
debugger;
var x = e[3];
}
function testProtoIndexedSetter3_1() {
expected_function_name = 'setter3';
expected_source_line_text = ' this.name = n; // setter 3';
debugger;
e[3] = 'new val';
}
function testProtoSetter1_2() {
expected_function_name = 'setter1';
expected_source_line_text = ' this.name = n; // setter 1';
for (var i = 2; i != 1; i--);
debugger;
e['setter' + i] = 'aa';
}
for (var n in this) {
if (n.substr(0, 4) != 'test') {
continue;
}
state = 1;
this[n]();
assertNull(exception);
assertEquals(3, state);
}
// Get rid of the debug event listener.
Debug.setListener(null);

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@ -58,6 +58,7 @@ debug-ignore-breakpoints: CRASH || FAIL
debug-multiple-breakpoints: CRASH || FAIL
debug-setbreakpoint: CRASH || FAIL || PASS
debug-step-stub-callfunction: SKIP
debug-stepin-accessor: CRASH || FAIL
debug-stepin-constructor: CRASH, FAIL
debug-stepin-function-call: CRASH || FAIL
debug-step: SKIP