FilesExpand file tree

 master

/

debug-step.js

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

49 lines (40 loc) · 1.28 KB

 master

/

debug-step.js

Top

File metadata and controls

• Code
• Blame

49 lines (40 loc) · 1.28 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

// Copyright 2016 the V8 project authors. All rights reserved.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.

// Flags: --cache=code

Debug = debug.Debug

// Simple debug event handler which first time hit will perform 1000 steps and

// second time hit will evaluate and store the value of "i". If requires that

// the global property "state" is initially zero.

var bp1, bp2;

function listener(event, exec_state, event_data, data) {

if (event == Debug.DebugEvent.Break) {

if (step_count > 0) {

exec_state.prepareStep(Debug.StepAction.StepInto);

step_count--;

} else {

result = exec_state.frame().evaluate("i").value();

// Clear the break point on line 2 if set.

if (bp2) {

Debug.clearBreakPoint(bp2);

}

}

}

};

// Add the debug event listener.

Debug.setListener(listener);

// Test debug event for break point.

function f() {

var i; // Line 1.

for (i = 0; i < 1000; i++) { // Line 2.

x = 1; // Line 3.

}

};

// Set a breakpoint on the for statement (line 1).

bp1 = Debug.setBreakPoint(f, 1);

// Check that performing 1000 steps will make i 333.

var step_count = 1000;

result = -1;

f();

assertEquals(333, result);

Debug.setListener(null);