Details
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Bug
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Status: Closed (View Workflow)
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Critical
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Resolution: Fixed
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10.5, 11.5
Description
Original full hanging command during 11.5 opt UB+ASAN compilation:
00:04:47 /usr/lib/gcc/x86_64-linux-gnu/12/cc1 -quiet -I /test/11.5_opt_san/storage/mroonga/vendor/groonga/lib -I /test/11.5_opt_san/storage/mroonga/vendor/groonga/include -I /test/11.5_opt_san/storage/mroonga/vendor/groonga -I /test/11.5_opt_san/wsrep-lib/include -I /test/11.5_opt_san/wsrep-lib/wsrep-API/v26 -I /test/11.5_opt_san/include -I /test/11.5_opt_san/include/providers -I /test/11.5_opt_san/storage/mroonga/vendor/groonga/lib/dat -imultiarch x86_64-linux-gnu -MD CMakeFiles/libgroonga.dir/expr.c.d -MF CMakeFiles/libgroonga.dir/expr.c.o.d -MT storage/mroonga/vendor/groonga/lib/CMakeFiles/libgroonga.dir/expr.c.o -D GRN_DAT_EXPORT -D GRN_EMBEDDED -D HAVE_CONFIG_H -D ONIG_EXTERN=extern -D USE_MYSYS_NEW -D _FILE_OFFSET_BITS=64 -D HAVE_ONIGMO_H -D MRB_INT64 -U _FORTIFY_SOURCE -U _FORTIFY_SOURCE -D WITH_UBSAN -D DBUG_OFF /test/11.5_opt_san/storage/mroonga/vendor/groonga/lib/expr.c -quiet -dumpdir CMakeFiles/libgroonga.dir/ -dumpbase expr.c.c -dumpbase-ext .c -mtune=generic -march=x86-64 -g -O3 -Wno-unused-but-set-variable -Wno-pointer-sign -Wformat=1 -Wstrict-aliasing=2 -Wno-disabled-optimization -Wfloat-equal -Wpointer-arith -Wbad-function-cast -Wcast-align -Wno-sign-compare -Wno-missing-field-initializers -Wimplicit-fallthrough=0 -Wno-uninitialized -Wall -Wdeclaration-after-statement -Wenum-compare -Wenum-conversion -Wextra -Wformat-security -Wmissing-braces -Wformat-truncation=0 -Wno-init-self -Wno-nonnull-compare -Wno-unused-parameter -Wvla -Wwrite-strings -std=gnu99 -std=gnu99 -fexceptions -fno-strict-aliasing -fsanitize=address -fsanitize=address -fsanitize-address-use-after-scope -fsanitize=undefined -fno-sanitize=alignment -fno-omit-frame-pointer -fPIC -fasynchronous-unwind-tables -fstack-protector-strong -Wformat-security -fstack-clash-protection -fcf-protection -o /tmp/ccKRo6T9.s
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The (overly reduced) command:
/usr/lib/gcc/x86_64-linux-gnu/12/cc1 -I /test/11.5_opt_san/storage/mroonga/vendor/groonga/lib -I /test/11.5_opt_san/storage/mroonga/vendor/groonga/include -I /test/11.5_opt_san/storage/mroonga/vendor/groonga -I /test/11.5_opt_san/wsrep-lib/include -I /test/11.5_opt_san/wsrep-lib/wsrep-API/v26 -I /test/11.5_opt_san/include -I /test/11.5_opt_san/include/providers -I /test/11.5_opt_san/storage/mroonga/vendor/groonga/lib/dat -imultiarch x86_64-linux-gnu -D HAVE_CONFIG_H -D WITH_UBSAN /test/11.5_opt_san/storage/mroonga/vendor/groonga/lib/expr.c -dumpdir CMakeFiles/libgroonga.dir/ -dumpbase expr.c.c -dumpbase-ext .c -g -O3 -std=gnu99 -fPIC -Wstrict-aliasing -o /tmp/ccKRo6T9.s
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Will show:
... functions are shown ...
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Analyzing compilation unit
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Performing interprocedural optimizations
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<*free_lang_data> {heap 15M} <visibility> {heap 15M} <build_ssa_passes> {heap 15M} <opt_local_passes> {heap 17M}
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Note the {heap 17M}. It will pause at this point for a few minutes, before continuing the output:
... previous output above ...
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<remove_symbols> {heap 119M} <targetclone> {heap 119M} <free-fnsummary> {heap 119M}
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Streaming LTO
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<whole-program> {heap 119M} <profile_estimate> {heap 119M} <icf> {heap 119M} <devirt> {heap 119M} <cp> {heap 119M} <sra> {heap 119M} <fnsummary> {heap 119M} <inline> {heap 119M} <pure-const> {heap 119M} <modref> {heap 119M} <free-fnsummary> {heap 119M} <static-var> {heap 119M} <single-use> {heap 119M} <comdats> {heap 119M}
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Assembling functions:
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<simdclone> {heap 119M} ... functions are shown ...
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The bit longer (and thus not overly reduced/actual working testcase):
/usr/lib/gcc/x86_64-linux-gnu/12/cc1 -I /test/11.5_opt_san/storage/mroonga/vendor/groonga/lib -I /test/11.5_opt_san/storage/mroonga/vendor/groonga/include -I /test/11.5_opt_san/storage/mroonga/vendor/groonga -I /test/11.5_opt_san/wsrep-lib/include -I /test/11.5_opt_san/wsrep-lib/wsrep-API/v26 -I /test/11.5_opt_san/include -I /test/11.5_opt_san/include/providers -I /test/11.5_opt_san/storage/mroonga/vendor/groonga/lib/dat -imultiarch x86_64-linux-gnu -D HAVE_CONFIG_H -D WITH_UBSAN /test/11.5_opt_san/storage/mroonga/vendor/groonga/lib/expr.c -dumpdir CMakeFiles/libgroonga.dir/ -dumpbase expr.c.c -dumpbase-ext .c -g -O3 -std=gnu99 -fexceptions -fno-strict-aliasing -fsanitize=address -fsanitize=address -fsanitize-address-use-after-scope -fsanitize=undefined -fno-sanitize=alignment -fno-omit-frame-pointer -fPIC -o /tmp/ccKRo6T9.s
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Will show similar output, however:
...
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Analyzing compilation unit
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Performing interprocedural optimizations
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<*free_lang_data> {heap 17M} <visibility> {heap 17M} <build_ssa_passes> {heap 17M} <opt_local_passes> {heap 22M}
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And then hang, with a small amount of single-thread CPU usage, presumable doing some compiler level optimzations or similar.
Note the {heap 22M} (the original unreduced command is 23M). It thus seems there is some "too complex" operation going on that does not terminate.
The time lapsed can be seen with:
$ echo $(( ($(date +%s) - $(stat -c %Y /tmp/ccKRo6T9.s)) / 60 )) minutes |
20 minutes # Original command tested to hang 30+ min, and the orginal compilation of a single build had failed overnight (i.e. 8+ hours) |
As GCC 13 is the default on Ubuntu 23, here is the procedure for installing GCC 12.3.0 and making it default:
sudo apt remove gcc-13 g++-13 |
sudo apt update |
sudo apt install gcc-12 g++-12 |
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 10 |
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-12 10 |
sudo update-alternatives --config gcc # 0/auto |
sudo update-alternatives --config g++ # 0/auto |
gcc --version # 12.3.0 |
g++ --version # 12.3.0 |
Note that if you use -j >1 threads, the compilation may hang at different percentages. I have seen it as low as approx 25% up to 96% using 30 threads; use ps -ef | grep cc | grep mroonga once hang occurs.
Verified on 10.5 opt and 11.5 opt.
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