n-api: throw RangeError in napi_create_dataview() with invalid range #17869

romandev · 2017-12-26T14:38:34Z

The API is required that byte_length + byte_offset is less than or
equal to the size in bytes of the array passed in. If not, a RangeError
exception is raised.

Refs: https://nodejs.org/api/n-api.html#n_api_napi_create_dataview

Checklist

make -j4 test (UNIX), or vcbuild test (Windows) passes
tests and/or benchmarks are included
commit message follows commit guidelines

Affected core subsystem(s)

n-api

addaleax · 2017-12-27T13:49:09Z

src/node_api.cc

+                           "napi_create_dataview",
+                           "byte_offset + byte_length should be less than or "
+                           "equal to the size in bytes of the array passed in");
+  }


Shouldn't there be some kind of early return in this case? Otherwise we still create the DataView instance & pass it in *result... right?

You're right. I missed return statement. :(
Done. Thank you for review.

TimothyGu

The fact that V8 isn’t throwing an error on cases like this sounds like a bug to me, as the JS DataView constructor does throw. But, this LGTM.

romandev · 2017-12-27T16:29:53Z

Thank you for review. You're right. In JS code, new DataView(new ArrayBuffer(10), 3, 20) will throw RangeError[1] but V8 public API is not.

[1] https://cs.chromium.org/chromium/src/v8/src/builtins/builtins-dataview.cc?sq=package:chromium&l=74

romandev · 2018-01-02T11:04:48Z

Gentle ping :)

mhdawson · 2018-01-03T19:21:07Z

src/node_api.cc

+  if (byte_length + byte_offset > buffer->ByteLength()) {
+    return napi_throw_range_error(
+        env,
+        "napi_create_dataview",


The CODE passed in should be defined in https://github.com/nodejs/node/blob/master/lib/internal/errors.js right after ERR_NAPI_CONTS_PROTOTYPE_OBJECT, and I'd suggest it be ERR_NAPI_INVALID_DATAVIEW_ARGS

Thank you for review. Done.

mhdawson · 2018-01-03T19:21:48Z

Just one comment about how we define the error code but after that it fixed up it looks good.

mhdawson · 2018-01-03T22:25:26Z

lib/internal/errors.js

@@ -433,6 +433,8 @@ E('ERR_MODULE_RESOLUTION_LEGACY', '%s not found by import in %s.' +
 E('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
 E('ERR_NAPI_CONS_FUNCTION', 'Constructor must be a function');
 E('ERR_NAPI_CONS_PROTOTYPE_OBJECT', 'Constructor.prototype must be an object');
+E('ERR_NAPI_INVALID_DATAVIEW_ARGS',
+  'Invalid arguments were passed to napi_create_dataview()');


The message here should match the message in src/node_api.cc. There will be a better way to handle errors on the native side but for now I think we want to make the messages the same.

I should have suggested that in the original comment.

Thank you for explanation.
I've addressed your comment in my latest patch.

mhdawson

LGTM

mhdawson · 2018-01-04T22:32:21Z

CI run: https://ci.nodejs.org/job/node-test-pull-request/12409/

The API is required that `byte_length + byte_offset` is less than or equal to the size in bytes of the array passed in. If not, a RangeError exception is raised[1]. [1] https://nodejs.org/api/n-api.html#n_api_napi_create_dataview

romandev · 2018-01-05T01:45:09Z

@mhdawson I've just fixed the CI error in latest patch. Also, I tested it on my Mac and Linux. (Used this command /usr/bin/python2.7 tools/test.py --mode=release -J addons-napi)
Could you please re-run CI?

romandev · 2018-01-05T01:51:57Z

src/node_api.cc

+        "ERR_NAPI_INVALID_DATAVIEW_ARGS",
+        "byte_offset + byte_length should be less than or "
+        "equal to the size in bytes of the array passed in");
+    return napi_set_last_error(env, napi_pending_exception);


FYI, a crash occurred because there was no this line.

mhdawson · 2018-01-05T16:51:11Z

new CI : https://ci.nodejs.org/job/node-test-pull-request/12421/

The API is required that `byte_length + byte_offset` is less than or equal to the size in bytes of the array passed in. If not, a RangeError exception is raised[1]. [1] https://nodejs.org/api/n-api.html#n_api_napi_create_dataview PR-URL: #17869 Reviewed-By: Tiancheng "Timothy" Gu <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Michael Dawson <[email protected]> Reviewed-By: James M Snell <[email protected]>

jasnell · 2018-01-10T00:23:29Z

Landed in 91c1ccd

The API is required that `byte_length + byte_offset` is less than or equal to the size in bytes of the array passed in. If not, a RangeError exception is raised[1]. [1] https://nodejs.org/api/n-api.html#n_api_napi_create_dataview PR-URL: #17869 Reviewed-By: Tiancheng "Timothy" Gu <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Michael Dawson <[email protected]> Reviewed-By: James M Snell <[email protected]>

The API is required that `byte_length + byte_offset` is less than or equal to the size in bytes of the array passed in. If not, a RangeError exception is raised[1]. [1] https://nodejs.org/api/n-api.html#n_api_napi_create_dataview PR-URL: nodejs#17869 Reviewed-By: Tiancheng "Timothy" Gu <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Michael Dawson <[email protected]> Reviewed-By: James M Snell <[email protected]>

The API is required that `byte_length + byte_offset` is less than or equal to the size in bytes of the array passed in. If not, a RangeError exception is raised[1]. [1] https://nodejs.org/api/n-api.html#n_api_napi_create_dataview Backport-PR-URL: #19447 PR-URL: #17869 Reviewed-By: Tiancheng "Timothy" Gu <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Michael Dawson <[email protected]> Reviewed-By: James M Snell <[email protected]>

The API is required that `byte_length + byte_offset` is less than or equal to the size in bytes of the array passed in. If not, a RangeError exception is raised[1]. [1] https://nodejs.org/api/n-api.html#n_api_napi_create_dataview Backport-PR-URL: #19265 PR-URL: #17869 Reviewed-By: Tiancheng "Timothy" Gu <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Michael Dawson <[email protected]> Reviewed-By: James M Snell <[email protected]>

nodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. dont-land-on-v4.x node-api Issues and PRs related to the Node-API. labels Dec 26, 2017

romandev mentioned this pull request Dec 26, 2017

Implement an initial implementation of DataView class nodejs/node-addon-api#205

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v9.5.0 release proposal #18464

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n-api: throw RangeError in napi_create_dataview() with invalid range #17869

n-api: throw RangeError in napi_create_dataview() with invalid range #17869

romandev commented Dec 26, 2017

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romandev Dec 27, 2017

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romandev commented Jan 2, 2018

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n-api: throw RangeError in napi_create_dataview() with invalid range #17869

n-api: throw RangeError in napi_create_dataview() with invalid range #17869

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romandev commented Dec 26, 2017

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