child_process: measure buffer length in bytes #7381
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Trott
added
child_process
| @@ -20,7 +20,7 @@ function main(conf) { | |||
| const len = +conf.len; | |||
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| const msg = '"' + Array(len).join('.') + '"'; | |||
| const options = { 'stdio': ['ignore', 'pipe', 'ignore'] }; | |||
| const options = {'stdio': ['ignore', 'ipc', 'ignore']}; | |||
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Merge error on my part that undoes a change that came in after the commit I reverted. Will fix it momentarily...
This reverts commit c9a5990.
This change fixes a known issue where `maxBuffer` limits by characters rather than bytes. Benchmark added to confirm no performance regression occurs with this change. This necessarily changes default behavior of `stdout` and `stderr` callbacks such that they receive buffers rather than strings. The alternative would be a performance hit on the defaults. Refs: nodejs#6764 Refs: nodejs#1901
This was referenced Jun 23, 2016
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Closing in favor of non-semver-major #7391 |
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Checklist
make -j4 test(UNIX) orvcbuild test nosign(Windows) passesAffected core subsystem(s)
child_process
Description of change
This re-implements a previous fix that had to be reverted. The fix is to measure the
maxBufferoption ofchild_process.exec()in bytes (per the documentation and user expectations) and not characters.Unfortunately, the fix had a side effect such the
child.stdoutandchild.stderrdataevents sent their callbacks buffers by default rather than strings. This is undocumented but fully exposed and caused bugs in userland (e.g., https://github.com/tes/bosco/issues/152).This PR depends on #7377. It re-implements the change, but this time it is marked
semver-majorand tests are added to confirm the behavior change.