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test: test buffer behavior when zeroFill undefined #11706

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@Trott Trott commented Mar 6, 2017 •
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When ArrayBufferAllocator has an undefined zeroFill property,
Buffer.allocUnsafe() should zero fill.

Refs: 27e84ddd4e1#commitcomment-19182129

The || [0] (discussed in the Refs: above) is the only piece of code in buffer.js not covered by tests. Ideally, this test would probably be a C++ addon test, but until someone writes that test, this will at least confirm that the intended behavior is correct.

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)

test buffer

@Trott Trott added buffer Issues and PRs related to the buffer subsystem. test Issues and PRs related to the tests. labels Mar 6, 2017
@nodejs-github-bot nodejs-github-bot added the test Issues and PRs related to the tests. label Mar 6, 2017
@Trott
test: test buffer behavior when zeroFill undefined
531dba7 
When ArrayBufferAllocator has an undefined zeroFill property,
Buffer.allocUnsafe() should zero fill.

Refs: nodejs@27e84ddd4e1#commitcomment-19182129
@bnoordhuis
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I don't know. This is brittle both in how it monkey-patches the bindings and how it expects buffers to contain random garbage. If in an individual run the buffers all come from freshly mmap-ed memory (not inconceivable with a loop like that) the test will fail.

You could ameliorate it somewhat by filling the buffer with non-zero data so that it's not all zeroes when its memory is reused for another buffer but that's still no guarantee.

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Trott commented Mar 6, 2017 •
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This is brittle

Yes, indeed. Best what can be said for it is that it's probably better than no test at all (our current situation).

Would happily close this in favor of a C++ addon that did the testing instead.

addaleax
addaleax approved these changes Mar 6, 2017
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Code LGTM, and I don’t think it hurts to have this

test/parallel/test-buffer-bindingobj-no-zerofill.js
// `process.binding('buffer').setupBufferJS` be monkey-patched before this runs.
const monkeyPatchedBuffer = require('../../lib/buffer');

// On unpatched buffer. allocUnsafe() should not zero fill memory. It's always
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typo: , after buffer?

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fhinkel commented Mar 9, 2017

Thanks, landed with fixed typo in 9ee58c0.

@fhinkel fhinkel closed this Mar 9, 2017
fhinkel pushed a commit that referenced this pull request Mar 9, 2017
@Trott @fhinkel
test: test buffer behavior when zeroFill undefined
9ee58c0 
When ArrayBufferAllocator has an undefined zeroFill property,
Buffer.allocUnsafe() should zero fill.

Refs: 27e84ddd4e1#commitcomment-19182129

PR-URL: #11706
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
@Trott
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Trott commented Mar 9, 2017

(Looks like this may have landed without a CI run. :-O )

italoacasas pushed a commit to italoacasas/node that referenced this pull request Mar 13, 2017
@Trott @italoacasas
test: test buffer behavior when zeroFill undefined
1af0fa4 
When ArrayBufferAllocator has an undefined zeroFill property,
Buffer.allocUnsafe() should zero fill.

Refs: nodejs@27e84ddd4e1#commitcomment-19182129

PR-URL: nodejs#11706
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
@italoacasas italoacasas mentioned this pull request Mar 13, 2017
Merged
jungx098 pushed a commit to jungx098/node that referenced this pull request Mar 21, 2017
@Trott @jungx098
test: test buffer behavior when zeroFill undefined
1dfa279 
When ArrayBufferAllocator has an undefined zeroFill property,
Buffer.allocUnsafe() should zero fill.

Refs: nodejs@27e84ddd4e1#commitcomment-19182129

PR-URL: nodejs#11706
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Qantas94Heavy added a commit to Qantas94Heavy/node that referenced this pull request Apr 9, 2017
@Qantas94Heavy
test: fix allocUnsafe uninitialized buffer check
5700fc8 
Fixes parallel/test-buffer-bindingobj-no-zerofill to properly check
that buffers created with `Buffer.allocUnsafe()` are not zero-filled.

The test introduced in nodejs#11706 passes even if the buffer has been
zero-filled and fails if none of the buffer values are zero.

Signed-off-by: Karl Cheng <qantas94heavy@gmail.com>
Refs: nodejs#11706
@Qantas94Heavy Qantas94Heavy mentioned this pull request Apr 9, 2017
Closed
2 tasks
jasnell pushed a commit that referenced this pull request Apr 11, 2017
@Qantas94Heavy @jasnell
test: fix allocUnsafe uninitialized buffer check
eb49d59 
Fixes parallel/test-buffer-bindingobj-no-zerofill to properly check
that buffers created with `Buffer.allocUnsafe()` are not zero-filled.

The test introduced in #11706 passes even if the buffer has been
zero-filled and fails if none of the buffer values are zero.

Refs: #11706
PR-URL: #12290
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
@MylesBorins
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looks like this has failures. Please manually backport (and include #12290 )

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Trott commented Apr 18, 2017

This depends on #7082 which is labeled dont-land-on-v6.x. Labeling this the same (and #12290 as well).

evanlucas pushed a commit that referenced this pull request Apr 25, 2017
@Qantas94Heavy @evanlucas
test: fix allocUnsafe uninitialized buffer check
8ee62cd 
Fixes parallel/test-buffer-bindingobj-no-zerofill to properly check
that buffers created with `Buffer.allocUnsafe()` are not zero-filled.

The test introduced in #11706 passes even if the buffer has been
zero-filled and fails if none of the buffer values are zero.

Refs: #11706
PR-URL: #12290
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
evanlucas pushed a commit that referenced this pull request May 1, 2017
@Qantas94Heavy @evanlucas
test: fix allocUnsafe uninitialized buffer check
e63607b 
Fixes parallel/test-buffer-bindingobj-no-zerofill to properly check
that buffers created with `Buffer.allocUnsafe()` are not zero-filled.

The test introduced in #11706 passes even if the buffer has been
zero-filled and fails if none of the buffer values are zero.

Refs: #11706
PR-URL: #12290
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
evanlucas pushed a commit that referenced this pull request May 2, 2017
@Qantas94Heavy @evanlucas
test: fix allocUnsafe uninitialized buffer check
1ab998f 
Fixes parallel/test-buffer-bindingobj-no-zerofill to properly check
that buffers created with `Buffer.allocUnsafe()` are not zero-filled.

The test introduced in #11706 passes even if the buffer has been
zero-filled and fails if none of the buffer values are zero.

Refs: #11706
PR-URL: #12290
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
@Trott Trott mentioned this pull request Aug 18, 2018
Closed
3 tasks
@starkwang starkwang mentioned this pull request Aug 27, 2018
Closed
@Trott Trott deleted the buffer-addon branch January 13, 2022 22:34
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@fhinkel fhinkel fhinkel approved these changes

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