tree 6517be98fae46ad5424690dfd2e04260db5a6b0d
parent 6f19bc6f7a4be8b2d78ef508b1a5e79e83e37dd0
author Nathan Sidwell <nathan@acm.org> 1644262388 -0800
committer Copybara-Service <copybara-worker@google.com> 1644840404 -0800

[demangler] Fix buffer growth

The output buffer growth algorithm had a few issues:

a) An off-by-one error in the initial size check, which uses
'>='. This error was safe, but could cause us to reallocate when there
was no need.

b) An inconsistency between the initial size check (>=) and the
post-doubling check (>).  The latter was somewhat obscured by the
swapped operands.

c) There would be many reallocs with an initially-small buffer.  Add a
little initialization hysteresis.

Reviewed By: ChuanqiXu

Differential Revision: https://reviews.llvm.org/D119177

GitOrigin-RevId: 995c4f306890ad379de19106f053238ce89f1483