ASAN deadly signal

[tekknolagi]

Hi,

When I try to build on GitHub Actions, the project works fine. It can compile the C output of my compiler! Very cool.

When I try to build and bootstrap locally, I run into ASAN issues:

AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
...

I tried to attach with GDB but ran into apparent signal handler recursion issues.

[fuhsnn]

Can you share a bit more about your setup (distro and version) and what code triggers that? I'll try to reproduce it.

ASAN shouldn't be required for normal usage, though, that was me being lazy with makefile. Please make do with cc *.c or remove the -fsanitize in makefile before I fix that (want to take the chance to rewrite it for pdpmake compatibility.)

[tekknolagi]

hickory% uname -r
6.8.0-51-generic
hickory% lsb_release -irc
Distributor ID: Ubuntu
Release:        22.04
Codename:       jammy
hickory% cc --version
cc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0

Same under Clang though. I'm just running make test-stage2

[tekknolagi]

Oh actually now I get segfaults under Clang:

make: *** [GNUmakefile:41: stage2/main.o] Segmentation fault (core dumped)
make: *** Waiting for unfinished jobs....
make: *** [GNUmakefile:41: stage2/type.o] Segmentation fault (core dumped)
make: *** [GNUmakefile:41: stage2/codegen.o] Segmentation fault (core dumped)
make: *** [GNUmakefile:41: stage2/alloc.o] Error 1
make: *** [GNUmakefile:41: stage2/preprocess.o] Error 1
make: *** [GNUmakefile:41: stage2/hashmap.o] Error 1

[fuhsnn]

Couldn't reproduce with docker'ed Ubuntu 22.04:

FROM ubuntu:22.04
RUN apt-get update && apt-get install -y --no-install-recommends \
 clang libc-dev make file git ca-certificates

WORKDIR /work/
RUN git clone --depth 1 https://github.com/fuhsnn/slimcc && \
 cd /work/slimcc && \
 make CC=clang test-stage2

Can you try GDB again with the following step?

clang -Wno-switch -g *.c -o slimcc
gdb ./slimcc -ex "set confirm off" -ex "set follow-fork-mode child" -ex "r -c main.c"