[PATCH] D63586: [ASan] Use dynamic shadow on 32-bit iOS and simulators

[Julian Lettner via Phabricator via llvm-commits]

yln created this revision.
Herald added subscribers: llvm-commits, Sanitizers, hiraditya, kubamracek.
Herald added projects: Sanitizers, LLVM.

The VM layout on iOS is not stable between releases. On 64-bit iOS and
its derivatives we use a dynamic shadow offset that enables ASan to
search for a valid location for the shadow heap on process launch rather
than hardcode it.

This commit extends that approach for 32-bit iOS plus derivatives and
their simulators.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D63586

Files:
  compiler-rt/lib/asan/asan_mapping.h
  compiler-rt/lib/sanitizer_common/sanitizer_mac.cc
  llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
  llvm/test/Instrumentation/AddressSanitizer/dynamic-shadow-darwin.ll

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