[all-commits] [llvm/llvm-project] ef9627: [scudo] Allow the quarantine code to be compiled o...

[Christopher Ferris via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ef962752d9fee02fe1e626dc92206eb0457e2aa3
      https://github.com/llvm/llvm-project/commit/ef962752d9fee02fe1e626dc92206eb0457e2aa3
  Author: Christopher Ferris <cferris1000 at users.noreply.github.com>
  Date:   2025-07-30 (Wed, 30 Jul 2025)

  Changed paths:
    M compiler-rt/lib/scudo/standalone/allocator_config.def
    M compiler-rt/lib/scudo/standalone/allocator_config_wrapper.h
    M compiler-rt/lib/scudo/standalone/combined.h
    M compiler-rt/lib/scudo/standalone/secondary.h
    M compiler-rt/lib/scudo/standalone/tests/combined_test.cpp

  Log Message:
  -----------
  [scudo] Allow the quarantine code to be compiled out (#151064)

Add a new configuration option QuarantineDisabled that allows all of the
quarantine code to be compiled out.

Add new tests that verify that the code is removed properly.

On Android, this saves ~4000 bytes for 32 bit and ~6000 bytes for 64
bit.

On Android, I used some microbenchmarks that do malloc/free in a loop
and for allocations in the primary, the performance is about the same
for both 32 bit and 64 bit. For secondary allocations, I saw ~8% speed
up on 32 bit and ~3% on 64 bit speed up which feels like it could just
be code size improvements.



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