[compiler-rt] Fix Asan imports/exports unittest

[etienneb]

Summary

Avoid mismatch between imports/exports for 32-bit and 64-bits version.

The test is running grep over macros to detect which functions are
intercepted. Unfortunately, exception handlers differ in 32-bit and
64-bit.

This patch is removing the exception handlers from the test.

[etienneb]

better solution

[rnk]

lgtm

test/asan/TestCases/Windows/dll_host.cc

8–9

Can you comment that we're removing the "@12" part of the 32-bit exported mangled names because it won't be mentioned in the source?

[etienneb]

add comments

test/asan/TestCases/Windows/dll_host.cc

 // This is a host program for DLL tests.
 //
 // Just make sure we can compile this.
 // The actual compile&run sequence is to be done by the DLL tests.
 // RUN: %clang_cl_asan -O0 %s -Fe%t
 //
 // Get the list of ASan wrappers exported by the main module RTL:
-// RUN: dumpbin /EXPORTS %t | grep -o "__asan_wrap[^ ]*" | grep -v @ | sort | uniq > %t.exported_wrappers
+// (note: We need to filter out: _except_handler3, _except_handler4 and __C_specific_handler)
+// RUN: dumpbin /EXPORTS %t | grep -o "__asan_wrap[^ ]*" | sed /_handler/d | grep -v @ | sort | uniq > %t.exported_wrappers
 // FIXME: we should really check the other __asan exports too.
 // RUN: dumpbin /EXPORTS %t | grep -o "__sanitizer_[^ ]*" | grep -v @ | sort | uniq >> %t.exported_wrappers
 //
 // Get the list of ASan wrappers imported by the DLL RTL:
 // [BEWARE: be really careful with the sed commands, as this test can be run
-//  from different environemnts with different shells and seds]
-// RUN: grep INTERCEPT_LIBRARY_FUNCTION %p/../../../../lib/asan/asan_win_dll_thunk.cc | grep -v define | sed -e s/.*(/__asan_wrap_/ | sed -e s/).*// | sort | uniq > %t.dll_imports
-// RUN: grep "^INTERFACE_FUNCTION.*sanitizer" %p/../../../../lib/asan/asan_win_dll_thunk.cc | grep -v define | sed -e s/.*(// | sed -e s/).*// | sort | uniq >> %t.dll_imports
+//  from different environments with different shells and seds]
+// RUN: grep INTERCEPT_LIBRARY_FUNCTION %p/../../../../lib/asan/asan_win_dll_thunk.cc | grep -v define | sed /_handler/d | sed -e s/.*(/__asan_wrap_/ | sed -e s/).*// | sort | uniq > %t.dll_imports
+// RUN: grep "^INTERFACE_FUNCTION.*sanitizer" %p/../../../../lib/asan/asan_win_dll_thunk.cc | grep -v define | sed /_handler/d | sed -e s/.*(// | sed -e s/).*// | sort | uniq >> %t.dll_imports
 //
 // Now make sure the DLL thunk imports everything:
 // RUN: echo
 // RUN: echo "=== NOTE === If you see a mismatch below, please update asan_win_dll_thunk.cc"
 // RUN: diff %t.dll_imports %t.exported_wrappers
 // REQUIRES: asan-static-runtime
 
 #include <stdio.h>