tree 97c4975b6d36f77586d5fd2f521d8ba79e2df379
parent b6e9b897d9cda26ee4272c041a620195db9beaed
author Jim Stichnoth <stichnot@chromium.org> 1457482720 -0800
committer Jim Stichnoth <stichnot@chromium.org> 1457482720 -0800

Subzero: Control memory growth from local label fixups.

The ConstantRelocatable objects for pushing local labels are allocated from the Assembler arena, and are no longer pooled, which restricts the memory growth from sandboxing x86-64 calls.

Because the Assembler arena is destroyed while the fixups are still active, these fixups have to be fixed up by holding a pointer to the symbol rather than the constant.

On the 10MB test pexe, the overall growth by the end is ~20MB, instead of ~130MB as before.

This also partially fixes an existing bug with arm32/nonsfi/iasm, exposed by running cross tests and forcing iasm output.

BUG= none
R=jpp@chromium.org

Review URL: https://codereview.chromium.org/1773503003 .