Make sanitizers work again in coreclr

[omajid]

• Don't use CMAKE_CURRENT_SOURCE_DIR because it points to the original CMakeLists.txt that's doing an include. Use the variable that explicitly refers to eng/native.

• --ffunction-sections produces an error with clang. -fsanitize=bool;-ffunction-sections (single dash in -ffunction) is accepted by even clang 3.0 (the oldest clang I could find on godbolt.org while the two-dash variant is treated as an error.

• Add symbolizer argument to enable-sanitizers.sh to force exporting the symbol variable, which the comment states (I haven't verified) is not needed on newer clang versions.

• Stop defaulting to an older clang version, and support un-versioned names too.

[dotnet-issue-labeler]

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[omajid]

I figured I would enable sanitizers to see if something obvious pops up for #61671, but I am running into some errors locally that I don't know how to fix:

$ source ./src/coreclr/enablesanitizers.sh ubsan
$ export VERBOSE=1
$ ./build.sh clr+libs+libs.tests -rc checked -lc Release
[....]
  /usr/bin/ld: ../../dlls/mscordac/libmscordaccore.so: undefined reference to `typeinfo for BINDER_SPACE::Assembly'
  /usr/bin/ld: ../../dlls/mscordac/libmscordaccore.so: undefined reference to `typeinfo for LCGMethodResolver'
  /usr/bin/ld: ../../dlls/mscordac/libmscordaccore.so: undefined reference to `typeinfo for DebuggerRCThread'

[omajid]

A standalone build with - without sanitizers enabled ./build.sh clr+libs+libs.tests -rc checked -lc Release - works for me.

I wonder why enabling sanitizers introduces undefined references.

Anyone know where if there's a library I need to link to to get access to BINDER_SPACE::Assembly, LCGMethodResolver and DebuggerRCThread?

[ghost]

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Issue Details

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• Don't use CMAKE_CURRENT_SOURCE_DIR because it points to the original CMakeLists.txt that's doing an include. Use the variable that explicitly refers to eng/native.

• --ffunction-sections produces an error with clang. -fsanitize=bool;-ffunction-sections (single dash in -ffunction) is accepted by even clang 3.0 (the oldest clang I could find on godbolt.org while the two-dash variant is treated as an error.

• Add symbolizer argument to enable-sanitizers.sh to force exporting the symbol variable, which the comment states (I haven't verified) is not needed on newer clang versions.

• Stop defaulting to an older clang version, and support un-versioned names too.

Author:	omajid
Assignees:	-
Labels:	area-Infrastructure-coreclr, community-contribution
Milestone:	-

[omajid]

Marking this as draft, until the issues in #61948 (comment) are resolved.

[tstellar]

@omajid This can happen if you have a library consumer built with rtti enabled trying to link with a library built without rtti.

[ghost]

Draft Pull Request was automatically closed for inactivity. Please let us know if you'd like to reopen it.