Check for GC interrupt in JSON parser.

Check for GC interrupt in JSON parser.

BUG=v8:3974
LOG=NO

Committed: https://crrev.com/16ff37db4a416523e54c473640ccf52b53c6655e
Cr-Commit-Position: refs/heads/master@{#27334}

[ulan, 2015-03-18 16:39:10]

ulan@chromium.org changed reviewers:
+ yangguo@chromium.org

[ulan, 2015-03-18 16:39:11]

PTAL.

Below is the test that fails with OOM without this CL. I am not adding it since
it is long running and flaky.

table = [];

for (var i = 0; i < 32; i++) {
 table[i] = String.fromCharCode(i + 0x410);
 print(table[i]);
}


var random = (function() {
  var seed = 10;
  return function() {
    seed = (seed * 1009) % 8831;
    return seed;
  };
})();


function key(length) {
  var s = "";
  for (var i = 0; i < length; i++) {
    s += table[random() % 32];
  }
  return '"' + s + '"';
}


function value() {
  return '[{' + '"field1" : ' + random() + ', "field2" : ' + random() + '}]';
}


function generate(n) {
  var s = '{';  
  for (var i = 0; i < n; i++) {
     if (i > 0) s += ', ';
     s += key(random() % 10 + 7);
     s += ':';
     s += value();
  }
  s += '}';
  return s;
}


print("generating");

var str = generate(40000);

print("parsing "  + str.length);
JSON.parse(str);

print("done");

[ulan, 2015-03-18 16:40:10]

ulan@chromium.org changed reviewers:
+ hpayer@chromium.org

[Yang, 2015-03-20 09:15:33]

On 2015/03/18 16:40:10, ulan wrote:

lgtm. Please add a comment in the json parser on the motivation though.

[ulan, 2015-03-20 09:29:27]

On 2015/03/20 09:15:33, Yang wrote:
> On 2015/03/18 16:40:10, ulan wrote:
> 
> lgtm. Please add a comment in the json parser on the motivation though.

Done.

[ulan, 2015-03-20 09:29:35]

The CQ bit was checked by ulan@chromium.org

[ulan, 2015-03-20 09:29:35]

The patchset sent to the CQ was uploaded after l-g-t-m from yangguo@chromium.org
Link to the patchset: https://codereview.chromium.org/1021523002/#ps40001
(title: "Add comment")

[commit-bot: I haz the power, 2015-03-20 09:29:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1021523002/40001

[commit-bot: I haz the power, 2015-03-20 09:52:22]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-03-20 09:52:43]

Patchset 3 (id:??) landed as
https://crrev.com/16ff37db4a416523e54c473640ccf52b53c6655e
Cr-Commit-Position: refs/heads/master@{#27334}