[all-commits] [llvm/llvm-project] 60de7d: [libc] Fix malloc Block alignment issue on riscv32...

[Daniel Thornburgh via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 60de7dc886b9d83b0e2b6c9d7b73173d5d870388
      https://github.com/llvm/llvm-project/commit/60de7dc886b9d83b0e2b6c9d7b73173d5d870388
  Author: Daniel Thornburgh <dthorn at google.com>
  Date:   2025-01-16 (Thu, 16 Jan 2025)

  Changed paths:
    M libc/src/__support/CMakeLists.txt
    M libc/src/__support/block.h
    M libc/src/__support/freelist_heap.h
    M libc/test/src/__support/block_test.cpp
    M libc/test/src/__support/freelist_heap_test.cpp

  Log Message:
  -----------
  [libc] Fix malloc Block alignment issue on riscv32 (#117815)

Aligning blocks to max_align_t is neither necessary nor sufficient to
ensure that the usable_space() is so aligned. Instead, we make this an
invariant of Block and maintain it in init() and split().

This allows targets like riscv32 with small pointers and large
max_align_t to maintain the property that all available blocks are
aligned for malloc(). This change adjusts the tests to match and also
updates them closer to llvm-libc style.



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