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n-api: guard against cond null dereference #21871

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gabrielschulhof
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A condition variable is only created by the thread-safe function if the
queue size is set to something larger than zero. This adds tests for the
case where the queue size is zero.

Fixes: nodejs/help#1387

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

@nodejs-github-bot 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 Jul 18, 2018
@gabrielschulhof
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CI to flush out potential platform-dependent bugs: https://ci.nodejs.org/job/node-test-pull-request/15937/

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Another CI after fixing syntax: https://ci.nodejs.org/job/node-test-pull-request/15938/

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LGTM

A condition variable is only created by the thread-safe function if the
queue size is set to something larger than zero. This adds null-checks
around the condition variable and tests for the case where the queue
size is zero.

Fixes: nodejs/help#1387
@gabrielschulhof
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Improved the commit message a bit.

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@gabrielschulhof
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@nodejs/collaborators may I please have another review before landing this?

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Landed in 53296e8.

gabrielschulhof pushed a commit that referenced this pull request Jul 24, 2018
A condition variable is only created by the thread-safe function if the
queue size is set to something larger than zero. This adds null-checks
around the condition variable and tests for the case where the queue
size is zero.

Fixes: nodejs/help#1387
PR-URL: #21871
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
@gabrielschulhof gabrielschulhof deleted the help-1387-tsfn-zero-queue branch July 24, 2018 02:09
targos pushed a commit that referenced this pull request Jul 24, 2018
A condition variable is only created by the thread-safe function if the
queue size is set to something larger than zero. This adds null-checks
around the condition variable and tests for the case where the queue
size is zero.

Fixes: nodejs/help#1387
PR-URL: #21871
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
@targos targos mentioned this pull request Jul 31, 2018
gabrielschulhof pushed a commit to gabrielschulhof/node that referenced this pull request Dec 28, 2018
A condition variable is only created by the thread-safe function if the
queue size is set to something larger than zero. This adds null-checks
around the condition variable and tests for the case where the queue
size is zero.

Fixes: nodejs/help#1387
PR-URL: nodejs#21871
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
MylesBorins pushed a commit that referenced this pull request Jan 18, 2019
A condition variable is only created by the thread-safe function if the
queue size is set to something larger than zero. This adds null-checks
around the condition variable and tests for the case where the queue
size is zero.

Fixes: nodejs/help#1387
PR-URL: #21871
Backport-PR-URL: #25002
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
rvagg pushed a commit that referenced this pull request Feb 28, 2019
A condition variable is only created by the thread-safe function if the
queue size is set to something larger than zero. This adds null-checks
around the condition variable and tests for the case where the queue
size is zero.

Fixes: nodejs/help#1387
PR-URL: #21871
Backport-PR-URL: #25002
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
@MylesBorins MylesBorins mentioned this pull request Mar 26, 2019
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napi_threadsafe_function -- Segmentation fault: 11
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