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deps: backport 03ef3cd from V8 upstream
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Reduces likelihood of the filename being truncated in /tmp/perf-*.map when
profiling with --perf_basic_prof.

PR-URL: #3165
Reviewed-By: bnoordhuis - Ben Noordhuis <[email protected]>

v8/v8@03ef3cd

Original commit message:
  improve perf_basic_prof filename reporting

  The buffer used for appending filenames to the string printed to the
  perf_basic_prof log was unnecessarily too small. Bump it up to be at least
  kUtf8BufferSize.

  Truncation of filenames makes it really hard to work with profiles gathered on
  Node.js. Because of the way Node.js works, you can have node module dependencies
  in deeply nested directories. The last thing you want when investigating a
  performance problem is to have script names be truncated.

  This patch is a stop-gap. Ideally, I want no truncation of the filename at all
  and use a dynamically growing buffer. That would be a larger change, and I
  wanted to have a quick fix available that can be back-ported to Node.js LTS
  release.

  [email protected],[email protected]
  BUG=

  Review URL: https://codereview.chromium.org/1388543002

  Cr-Commit-Position: refs/heads/master@{#31092}
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ofrobots committed Oct 5, 2015
1 parent 2e6ece4 commit 6fff47f
Showing 1 changed file with 1 addition and 1 deletion.
2 changes: 1 addition & 1 deletion deps/v8/src/log.cc
Original file line number Diff line number Diff line change
Expand Up @@ -147,7 +147,7 @@ class CodeEventLogger::NameBuffer {

private:
static const int kUtf8BufferSize = 512;
static const int kUtf16BufferSize = 128;
static const int kUtf16BufferSize = kUtf8BufferSize;

int utf8_pos_;
char utf8_buffer_[kUtf8BufferSize];
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