[PATCH] D13670: [sanitizer] Fix ptrace interceptor for aarch64

[Adhemerval Zanella via llvm-commits]

zatrazz updated this revision to Diff 37368.
zatrazz added a comment.

I updated the patch with additional checks for the iovec pointer itself and add
more tests for the test/asan/TestCases/Linux/ptrace.cc taking in consideration
all the current supported platforms. I tested on aarch64, arm*, powerpc64**, 
x86_64, and i386. I do not  have access to a mips64 machine, but I based the
changes on current code from ./test/sanitizer_common/TestCases/Linux/ptrace.cc.

For arm the test now fails due missing ptrace instrumentation for the architecture,
however I have a patch ready to fix it (so we might XFAIL arm-linux-gnueabi{hf}
for now). For powercp64 I had to use PTRACE_GETREGSET because
PTRACE_GETREGS was not supported on LE system I have access (although
the ptrace itself does not fail).


http://reviews.llvm.org/D13670

Files:
  lib/sanitizer_common/sanitizer_common_interceptors.inc
  test/asan/TestCases/Linux/ptrace.cc

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