[all-commits] [llvm/llvm-project] 96005d: [scudo] Tune FuchsiaConfig for RiscV

[Caslyn Tonelli via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 96005d75b29df315f74978cb0b7602b35f663b75
      https://github.com/llvm/llvm-project/commit/96005d75b29df315f74978cb0b7602b35f663b75
  Author: Caslyn Tonelli <caslyn at google.com>
  Date:   2023-04-17 (Mon, 17 Apr 2023)

  Changed paths:
    M compiler-rt/lib/scudo/standalone/allocator_config.h
    M compiler-rt/lib/scudo/standalone/platform.h

  Log Message:
  -----------
  [scudo] Tune FuchsiaConfig for RiscV

Reduce `PrimaryRegionSizeLog` to 28U to be compatible with a 38bit user
address space on the fuchsia-riscv platform. `PrimaryGroupSizeLog` is
reduced to 19 to preserve 512 BatchGroups per region.

This change can be tested on Fuchsia with:

```
fx set --auto-dir bringup.riscv64 --with //bundles:boot_tests \
fx build bundles:boot_tests \
fx run-boot-test --args={-s,1} boot-libc-unittests \
--cmdline='--gtest_filter=-*DeathTest*:PthreadGetSet*:ScudoSecondaryTest*'
```
The gtest filter ignores pthread and death tests due to non-scudo
related issues on fuchsia-riscv (ScudoSecondaryTest includes a death
check).

Related Ticket: https://fxbug.dev/125263

Differential Revision: https://reviews.llvm.org/D148475