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lua: enable fuzz introspector (#10891) 

This enables fuzz introspector for lua.

The [current
build](https://oss-fuzz-build-logs.storage.googleapis.com/log-95e09fbf-701e-4adf-ad25-8629c7dd5f8a.txt)
fails with:
```
Step #6 - "compile-libfuzzer-introspector-x86_64": [Log level 1] : 10:13:22 : This means a main function is in the source code rather in the libfuzzer library, and thus we do not care about it. We only want to study the actual fuzzers. Exiting this run.
Step #6 - "compile-libfuzzer-introspector-x86_64": /usr/bin/ld.gold: internal error in read_header_prolog, at ../../gold/dwarf_reader.cc:1678
Step #6 - "compile-libfuzzer-introspector-x86_64": clang-15: fatal error: linker command failed with exit code 1 (use -v to see invocation)
Step #6 - "compile-libfuzzer-introspector-x86_64": make: *** [makefile:119: lua] Error 1
Step #6 - "compile-libfuzzer-introspector-x86_64": 
```
At first I thought this was an issue of multiple-definitions since the
error is the same as: https://github.com/google/oss-fuzz/issues/8629
However, allowing multiple definitions didn't work.

I'm not entirely sure why this fixes the problem. It was through trial
and error I came up with the fix. I assume it may be some ASAN gets
compiled in somehow during non-ASAN builds and this causes issues for
the gold linker (but not in non-gold linkers, i.e. coverage and other
sanitizers are fine).

This fixes the introspector build, but also adds ASAN instrumentation
which bloats the calltrees, but the function table is good.

I tried setting LDFLAGS=-fsanitizer=address but this didn't work in the
case of Lua. I have some ideas, however, to fix this. Will pursue that
at a later stage.

Ref: https://github.com/google/oss-fuzz/issues/10882
This commit is contained in:
DavidKorczynski 2023-08-26 19:59:05 +01:00 committed by GitHub
parent 846244cfb4
commit ecff0de4a3
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7
projects/lua/build.sh
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@ -15,6 +15,13 @@
#
################################################################################
# For some reason the linker will complain if address sanitizer is not used
# in introspector builds.
if [ "$SANITIZER" == "introspector" ]; then
export CFLAGS="${CFLAGS} -fsanitize=address"
export CXXFLAGS="${CXXFLAGS} -fsanitize=address"
fi
PACKAGES="build-essential ninja-build cmake make"
if [ "$ARCHITECTURE" = "i386" ]; then
PACKAGES="$PACKAGES zlib1g-dev:i386 libreadline-dev:i386 libunwind-dev:i386"