[PATCH] D137357: [BOLT] Always move JTs in jump-table=move
Rafael Auler via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Nov 3 13:54:38 PDT 2022
rafauler created this revision.
rafauler added a reviewer: bolt.
Herald added subscribers: treapster, ayermolo.
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We should always move jump tables when requested. Previously,
we were not moving jump tables of non-simple functions in relocation
mode. That caused a bug detailed in the attached test case: in PIC
jump tables, we force jump tables to be moved, but if they are not
moved because the function is not simple, we could incorrectly update
original entries in .rodata, corruping it under special circunstances
(see testcase).
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D137357
Files:
bolt/lib/Core/BinaryEmitter.cpp
bolt/test/runtime/X86/jump-table-pic-conflict.s
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