valgrind currently does not work on GCC compiled executables, due to an upstream bug. https://bugs.kde.org/show_bug.cgi?id=472329
So temporarily switch to clang, so that a long term solution can be figured out in the meantime.
ci: Temporarily use clang in valgrind tasks #34589
pull maflcko wants to merge 3 commits into bitcoin:master from maflcko:2602-ci-temp-val changing 4 files +13 −8-
maflcko commented at 9:39 AM on February 14, 2026: member
- DrahtBot added the label Tests on Feb 14, 2026
-
DrahtBot commented at 9:39 AM on February 14, 2026: contributor
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in ci/test/00_setup_env_native_fuzz_with_valgrind.sh:21 in fa173ec59a outdated
16 | @@ -17,5 +17,6 @@ export FUZZ_TESTS_CONFIG="--valgrind" 17 | export GOAL="all" 18 | export BITCOIN_CONFIG="\ 19 | -DBUILD_FOR_FUZZING=ON \ 20 | - -DCMAKE_CXX_FLAGS='-Wno-error=array-bounds' \ 21 | + -DCMAKE_C_COMPILER=clang \ 22 | + -DCMAKE_CXX_COMPILER=clang++ \
l0rinc commented at 12:43 PM on February 14, 2026:is the removed
no-error=array-boundsrelated to the mentioned bug?
maflcko commented at 1:03 PM on February 14, 2026:No, this is just a gcc false-positive, which can be removed, because clang is used
maflcko commented at 1:09 PM on February 16, 2026:thx, added to the commit msg
in ci/test/00_setup_env_native_valgrind.sh:9 in fa173ec59a outdated
5 | @@ -6,9 +6,9 @@ 6 | 7 | export LC_ALL=C.UTF-8 8 | 9 | -export CI_IMAGE_NAME_TAG="mirror.gcr.io/debian:trixie" 10 | +export CI_IMAGE_NAME_TAG="mirror.gcr.io/ubuntu:26.04"
l0rinc commented at 12:44 PM on February 14, 2026:container image version
it's not strictly just the version, is this part of a unification attempts?
maflcko commented at 1:02 PM on February 14, 2026:It will have to be bumped anyway at some point, so might as well do it now. It shouldn't matter much
l0rinc commented at 1:33 PM on February 14, 2026:yeah, but is there an ubuntu
26.04version? In other cases we've used the24.04 LTS. https://releases.ubuntu.com/26.04-snapshot1 seems empty. The build is passing (though I don't see thevalgrindtasks referenced by the current GH Actions matrix anymore), not sure what I'm missing :/
maflcko commented at 1:10 PM on February 16, 2026:Added to the commit msg:
- Also, bump the container CI_IMAGE_NAME_TAG, while touching the config. + This bumps the valgrind version to be more recent: + https://packages.ubuntu.com/resolute/valgrind vs + https://packages.debian.org/trixie/valgrind
l0rinc commented at 2:18 PM on February 16, 2026:I still don't understand the
26.04tag - is that a custom snapshot that we want to use temporarily? We don't usually depend on unreleased OS, I'm confused why it's necessary here.
maflcko commented at 2:26 PM on February 16, 2026:I don't see a downside here to using it, and it has the benefit of using the latest clang compiler version and the latest valgrind version, so it is nice to know that they are working. I can keep it, but then someone will likely bump it later.
maflcko commented at 12:52 PM on March 10, 2026:(reverted for now, can be done in a follow-up i guess)
in contrib/valgrind.supp:16 in fa173ec59a
11 | @@ -12,13 +12,28 @@ 12 | # --error-limit=no build/bin/test_bitcoin 13 | # 14 | # Note that suppressions may depend on OS and/or library versions. 15 | -# Tested on aarch64 and x86_64 with Ubuntu Noble system libs, using clang-16 16 | -# and GCC, without gui. 17 | +# Tested on x86_64 with Ubuntu 26.04 system libs, using clang, without gui. 18 | +{
l0rinc commented at 12:46 PM on February 14, 2026:the title claims switching compiler, but I don't know how to review these lines
maflcko commented at 1:02 PM on February 14, 2026:Reverting them will make the CI fail.
I think you can also test locally by compiling with clang-21 and then running:
./bld-cmake/test/functional/interface_bitcoin_cli.py --valgrind
l0rinc commented at 8:18 PM on February 14, 2026:I tried this on an RPI5 with
Clangversion 22.0.0 (aarch64) for fa173ec59a9dcc2e7956366344d68999d1d1249e. It seems to trigger similarvalgrindfalse positives on aarch64 - the updated suppression doesn't seem to cover it, see:2026-02-14T19:42:42.017831Z TestFramework (ERROR): Unexpected exception Traceback (most recent call last): File "/mnt/my_storage/bitcoin/test/functional/test_framework/test_framework.py", line 138, in main self.setup() ~~~~~~~~~~^^ File "/mnt/my_storage/bitcoin/test/functional/test_framework/test_framework.py", line 272, in setup self.setup_network() ~~~~~~~~~~~~~~~~~~^^ File "/mnt/my_storage/bitcoin/test/functional/test_framework/test_framework.py", line 363, in setup_network self.setup_nodes() ~~~~~~~~~~~~~~~~^^ File "/mnt/my_storage/bitcoin/test/functional/test_framework/test_framework.py", line 385, in setup_nodes self.start_nodes() ~~~~~~~~~~~~~~~~^^ File "/mnt/my_storage/bitcoin/test/functional/test_framework/test_framework.py", line 531, in start_nodes node.wait_for_rpc_connection() ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^ File "/mnt/my_storage/bitcoin/test/functional/test_framework/test_node.py", line 316, in wait_for_rpc_connection raise FailedToStartError(self._node_msg( f'bitcoind exited with status {self.process.returncode} during initialization. {str_error}')) test_framework.test_node.FailedToStartError: [node 0] bitcoind exited with status 1 during initialization. ==68399== Use of uninitialised value of size 8 ==68399== at 0x22AD68: _M_is_engaged (optional:563) ==68399== by 0x22AD68: operator=<node::BlockfileCursor> (optional:1036) ==68399== by 0x22AD68: node::BlockManager::LoadBlockIndexDB(std::optional<uint256> const&) (???:565) ==68399== by 0x46C717: ChainstateManager::LoadBlockIndex() (../src/validation.cpp:4939) ==68399== by 0x241A8F: node::CompleteChainstateInitialization(ChainstateManager&, node::ChainstateLoadOptions const&) (../src/node/chainstate.cpp:43) ==68399== by 0x24142B: node::LoadChainstate(ChainstateManager&, kernel::CacheSizes const&, node::ChainstateLoadOptions const&) (../src/node/chainstate.cpp:184) ==68399== by 0x1950C7: operator() (../src/init.cpp:1392) ==68399== by 0x1950C7: operator()<(lambda at ../src/init.cpp:1392:45)> (???:1386) ==68399== by 0x1950C7: InitAndLoadChainstate(node::NodeContext&, bool, bool, kernel::CacheSizes const&, ArgsManager const&) (???:1392) ==68399== by 0x18FE6B: AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*) (../src/init.cpp:1809) ==68399== by 0x17BA97: AppInit (../src/bitcoind.cpp:242) ==68399== by 0x17BA97: main (???:283) ==68399== { <insert_a_suppression_name_here> Memcheck:Value8 fun:_M_is_engaged fun:operator=<node::BlockfileCursor> fun:_ZN4node12BlockManager16LoadBlockIndexDBERKSt8optionalI7uint256E fun:_ZN17ChainstateManager14LoadBlockIndexEv fun:_ZN4nodeL32CompleteChainstateInitializationER17ChainstateManagerRKNS_21ChainstateLoadOptionsE fun:_ZN4node14LoadChainstateER17ChainstateManagerRKN6kernel10CacheSizesERKNS_21ChainstateLoadOptionsE fun:operator() fun:operator()<(lambda at ../src/init.cpp:1392:45)> fun:_ZL21InitAndLoadChainstateRN4node11NodeContextEbbRKN6kernel10CacheSizesERK11ArgsManager fun:_Z11AppInitMainRN4node11NodeContextEPN10interfaces21BlockAndHeaderTipInfoE fun:AppInit fun:main } ==68399== ==68399== Exit program on first error (--exit-on-first-error=yes) ************************
l0rinc changes_requestedl0rinc commented at 12:48 PM on February 14, 2026: contributorconcept ACK
Could you please add a link to the bug for more context and split the change to commits that explain all the different changes. And it's "temporary", can we add a todo to the code to make it official :)?
maflcko commented at 1:05 PM on February 14, 2026: memberAnd it's "temporary", can we add a todo to the code to make it official :)?
It is not clear what to do, so a tracking issue seems more appropriate than a vague todo.
Could you please add a link to the bug for more context and split the change to commits that explain all the different changes.
The upstream bugs are https://bugs.kde.org/show_bug.cgi?id=485276 and https://bugs.kde.org/show_bug.cgi?id=472329
maflcko force-pushed on Feb 16, 2026maflcko marked this as a draft on Feb 19, 2026maflcko marked this as ready for review on Feb 27, 2026maflcko force-pushed on Feb 27, 2026maflcko commented at 11:41 AM on February 27, 2026: memberrebased and ready for nack/ack again
maflcko force-pushed on Feb 27, 2026maflcko added the label DrahtBot Guix build requested on Mar 5, 2026DrahtBot commented at 5:53 AM on March 8, 2026: contributor<!--9cd9c72976c961c55c7acef8f6ba82cd-->
Guix builds (on x86_64) [untrusted test-only build, possibly unsafe, not for production use]
DrahtBot removed the label DrahtBot Guix build requested on Mar 8, 2026maflcko requested review from l0rinc on Mar 10, 2026fadb77169btest: Scale feature_dbcrash.py timeout with factor
This allows to run the test under valgrind: ./bld-cmake/test/functional/feature_dbcrash.py --timeout-factor=10 --valgrind For testing, the same test can be run multiple times in parallel: ./bld-cmake/test/functional/test_runner.py -j 10 $( printf 'feature_dbcrash.py %.0s' {1..10} ) --timeout-factor=10 --valgrind (Running the test under valgrind may take several hours!) I found that before this commit, 9 out of the 10 runs failed via: ``` ... TestFramework (INFO): Iteration 36, generating 2500 transactions [11, 5, 6] TestFramework (ERROR): Unexpected exception Traceback (most recent call last): File "/b-c/test/functional/test_framework/test_framework.py", line 142, in main self.run_test() ~~~~~~~~~~~~~^^ File "/b-c/bld-cmake/test/functional/feature_dbcrash.py", line 262, in run_test self.sync_node3blocks(block_hashes) ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^ File "/b-c/bld-cmake/test/functional/feature_dbcrash.py", line 151, in sync_node3blocks nodei_utxo_hash = self.restart_node(i, block_hash) File "/b-c/bld-cmake/test/functional/feature_dbcrash.py", line 102, in restart_node raise AssertionError(f"Unable to successfully restart node {node_index} in allotted time") AssertionError: Unable to successfully restart node 0 in allotted time ``` With this commit, all 10 runs passed.maflcko force-pushed on Mar 10, 2026in test/sanitizer_suppressions/valgrind.supp:15 in fa6ba11768 outdated
11 | @@ -12,8 +12,7 @@ 12 | # --error-limit=no build/bin/test_bitcoin 13 | # 14 | # Note that suppressions may depend on OS and/or library versions. 15 | -# Tested on aarch64 and x86_64 with Ubuntu Noble system libs, using clang-16 16 | -# and GCC, without gui. 17 | +# Tested on x86_64 with Debian Trixie system libs, using clang, without gui.
maflcko commented at 3:35 PM on March 10, 2026:No, I have not tested the latest push at all. I've only tested this on Ubuntu 26.04. It should be easy to re-test by manually spinning up a x86_64 box and running the two CI valgrind configs, which use Debian Trixie.
l0rinc commented at 1:40 PM on March 10, 2026: contributorCode review ACK fa6ba11768cfa27d60b43ec43e84e88980837e74
l0rinc approvedin ci/test/00_setup_env_native_valgrind.sh:18 in fa6ba11768
16 | @@ -17,7 +17,9 @@ export TEST_RUNNER_EXTRA="--exclude rpc_bind --exclude feature_bind_extra" 17 | export GOAL="install" 18 | # TODO enable GUI
maflcko commented at 3:46 PM on March 10, 2026:I wonder why this isn't enabled. Let me try to enable it ...
Edit: Running with system libs gives:
$ valgrind --gen-suppressions=all --exit-on-first-error=yes --error-exitcode=1 --quiet ./bld-cmake/bin/test_bitcoin-qt ... ==906896== Conditional jump or move depends on uninitialised value(s) ==906896== at 0x243F0E26: ??? ==906896== by 0x1F08261F: ??? ==906896== { <insert_a_suppression_name_here> Memcheck:Cond obj:* obj:* } ==906896== ==906896== Exit program on first error (--exit-on-first-error=yes)
maflcko commented at 9:33 PM on March 10, 2026:Only seems to pass with DEBUG=1 depends.
For reference, the following command did pass for me:
( cd depends && make DEBUG=1 -j $(nproc) ) && cmake --fresh -B ./bld-cmake --toolchain depends/*/toolchain.cmake -DAPPEND_CXXFLAGS='-O3 -g2' -DAPPEND_CFLAGS='-O3 -g2' -DCMAKE_BUILD_TYPE=Debug -DCMAKE_EXE_LINKER_FLAGS=-fuse-ld=mold -DCMAKE_C_COMPILER='clang' -DCMAKE_CXX_COMPILER='clang++' --preset=dev-mode -DCMAKE_EXPORT_COMPILE_COMMANDS=ON && cmake --build ./bld-cmake --parallel $(nproc) && valgrind --exit-on-first-error=yes --error-exitcode=1 --quiet ./bld-cmake/bin/test_bitcoin-qtPushed a new commit to remove the TODO for now.
maflcko commented at 11:38 AM on March 11, 2026:I've also tried:
diff --git a/ci/test/00_setup_env_native_msan.sh b/ci/test/00_setup_env_native_msan.sh index 4a17fb4..0e1697b 100755 --- a/ci/test/00_setup_env_native_msan.sh +++ b/ci/test/00_setup_env_native_msan.sh @@ -16,14 +16,13 @@ export MSAN_AND_LIBCXX_FLAGS="${MSAN_FLAGS} ${LIBCXX_FLAGS}" export CONTAINER_NAME="ci_native_msan" export PACKAGES="clang-${APT_LLVM_V} llvm-${APT_LLVM_V} llvm-${APT_LLVM_V}-dev libclang-${APT_LLVM_V}-dev libclang-rt-${APT_LLVM_V}-dev python3-pip" export PIP_PACKAGES="--break-system-packages pycapnp" -export DEP_OPTS="DEBUG=1 NO_QT=1 CC=clang CXX=clang++ CFLAGS='${MSAN_FLAGS}' CXXFLAGS='${MSAN_AND_LIBCXX_FLAGS}'" +export DEP_OPTS="DEBUG=1 CC=clang CXX=clang++ CFLAGS='${MSAN_FLAGS}' CXXFLAGS='${MSAN_AND_LIBCXX_FLAGS}'" export GOAL="install" export CI_LIMIT_STACK_SIZE=1 # Setting CMAKE_{C,CXX}_FLAGS_DEBUG flags to an empty string ensures that the flags set in MSAN_FLAGS remain unaltered. # _FORTIFY_SOURCE is not compatible with MSAN. export BITCOIN_CONFIG="\ --preset=dev-mode \ - -DBUILD_GUI=OFF \ -DCMAKE_BUILD_TYPE=Debug \ -DCMAKE_C_FLAGS_DEBUG='' \ -DCMAKE_CXX_FLAGS_DEBUG='' \Which prints:
All tests passed. ~InitExecutor : Stopping thread ~InitExecutor : Stopped thread ==87986==WARNING: MemorySanitizer: use-of-uninitialized-value [#0](/bitcoin-bitcoin/0/) 0x56145624af4f in QLibraryStore::cleanup() /usr/qtbase/src/corelib/plugin/qlibrary.cpp:364:26 [#1](/bitcoin-bitcoin/1/) 0x56145623d05c in qlibraryCleanup() /usr/qtbase/src/corelib/plugin/qlibrary.cpp:378:5 [#2](/bitcoin-bitcoin/2/) 0x56145623d05c in (anonymous namespace)::qlibraryCleanup_dtor_class_::~qlibraryCleanup_dtor_class_() /usr/qtbase/src/corelib/plugin/qlibrary.cpp:380:23 [#3](/bitcoin-bitcoin/3/) 0x561450f4884f in MSanCxaAtExitWrapper(void*) (/ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/bin/test_bitcoin-qt+0x2df84f) (BuildId: 0a3f6add7bb2dd2a7bfc097a6edf88a12aebb62f) [#4](/bitcoin-bitcoin/4/) 0x7fb04940da75 (/lib/x86_64-linux-gnu/libc.so.6+0x47a75) (BuildId: 8e9fd827446c24067541ac5390e6f527fb5947bb) [#5](/bitcoin-bitcoin/5/) 0x7fb04940dbbd in exit (/lib/x86_64-linux-gnu/libc.so.6+0x47bbd) (BuildId: 8e9fd827446c24067541ac5390e6f527fb5947bb) [#6](/bitcoin-bitcoin/6/) 0x7fb0493f01d0 (/lib/x86_64-linux-gnu/libc.so.6+0x2a1d0) (BuildId: 8e9fd827446c24067541ac5390e6f527fb5947bb) [#7](/bitcoin-bitcoin/7/) 0x7fb0493f028a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28a) (BuildId: 8e9fd827446c24067541ac5390e6f527fb5947bb) [#8](/bitcoin-bitcoin/8/) 0x561450f16fb4 in _start (/ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/bin/test_bitcoin-qt+0x2adfb4) (BuildId: 0a3f6add7bb2dd2a7bfc097a6edf88a12aebb62f) Member fields were destroyed [#0](/bitcoin-bitcoin/0/) 0x561450f47de1 in __sanitizer_dtor_callback_fields (/ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/bin/test_bitcoin-qt+0x2dede1) (BuildId: 0a3f6add7bb2dd2a7bfc097a6edf88a12aebb62f) [#1](/bitcoin-bitcoin/1/) 0x561455b213ae in QLoggingCategory::~QLoggingCategory() /usr/qtbase/src/corelib/io/qloggingcategory.h:41:32 [#2](/bitcoin-bitcoin/2/) 0x561455b213ae in QLoggingCategory::~QLoggingCategory() /usr/qtbase/src/corelib/io/qloggingcategory.cpp:194:1 [#3](/bitcoin-bitcoin/3/) 0x561450f4884f in MSanCxaAtExitWrapper(void*) (/ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/bin/test_bitcoin-qt+0x2df84f) (BuildId: 0a3f6add7bb2dd2a7bfc097a6edf88a12aebb62f) [#4](/bitcoin-bitcoin/4/) 0x7fb04940dbbd in exit (/lib/x86_64-linux-gnu/libc.so.6+0x47bbd) (BuildId: 8e9fd827446c24067541ac5390e6f527fb5947bb) [#5](/bitcoin-bitcoin/5/) 0x7fb0493f01d0 (/lib/x86_64-linux-gnu/libc.so.6+0x2a1d0) (BuildId: 8e9fd827446c24067541ac5390e6f527fb5947bb) [#6](/bitcoin-bitcoin/6/) 0x7fb0493f028a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28a) (BuildId: 8e9fd827446c24067541ac5390e6f527fb5947bb) [#7](/bitcoin-bitcoin/7/) 0x561450f16fb4 in _start (/ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/bin/test_bitcoin-qt+0x2adfb4) (BuildId: 0a3f6add7bb2dd2a7bfc097a6edf88a12aebb62f) SUMMARY: MemorySanitizer: use-of-uninitialized-value /usr/qtbase/src/corelib/plugin/qlibrary.cpp:364:26 in QLibraryStore::cleanup() Exiting 99% tests passed, 1 tests failed out of 157 Total Test time (real) = 608.27 sec The following tests FAILED: 7 - test_bitcoin-qt (Failed) Errors while running CTest Command '['/ci_container_base/ci/test/03_test_script.sh']' returned non-zero exit status 8.l0rinc commented at 11:04 PM on March 10, 2026: contributorCode review ACK fac9ae4c931f1b0ad176d2558fa767de04d89521
faf3ef4ee7ci: Clarify why valgrind task has gui disabled
A build with system libs (or with a normal depends build) will fail with: ```sh $ valgrind --exit-on-first-error=yes --error-exitcode=1 --quiet ./bld-cmake/bin/test_bitcoin-qt Detected locale "C" with character encoding "ANSI_X3.4-1968", which is not UTF-8. Qt depends on a UTF-8 locale, and has switched to "C.UTF-8" instead. If this causes problems, reconfigure your locale. See the locale(1) manual for more information. ********* Start testing of AppTests ********* Config: Using QtTest library 6.10.2, Qt 6.10.2 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 15.2.0), ubuntu 26.04 PASS : AppTests::initTestCase() QINFO : AppTests::appTests() Backing up GUI settings to "/tmp/test_common bitcoin/60d474ffae390f81657d/regtest/guisettings.ini.bak" ==18007== Conditional jump or move depends on uninitialised value(s) ==18007== at 0x12655E26: ??? ==18007== by 0xCB28E7F: ??? ==18007== ==18007== ==18007== Exit program on first error (--exit-on-first-error=yes) ``` A DEBUG=1 depends build would work, but that seems tedious for questionable benefit.
fa70b9ebaaci: Temporarily use clang in valgrind tasks
valgrind currently does not work on GCC -O2 compiled executables, which contain std::optional use, due to an upstream bug. See https://bugs.kde.org/show_bug.cgi?id=472329 One workaround could be to use -O1. However, that seems brittle, as variantions of the bug were seen with -O1 as well. So temporarily use clang in the valgrind CI tasks, because this also allows to drop a false-positive suppression for: -DCMAKE_CXX_FLAGS='-Wno-error=array-bounds' Also, update the comment in contrib/valgrind.supp to mention the background: * GCC -O2 wasn't tested with the suppressions file, due to the mentioned bug. * Clang-17 (or later) on aarch64 wasn't tested due to bug https://github.com/bitcoin/bitcoin/issues/29635 and the minimum supported clang version is clang-17 right now. * GUI isn't tested, because it requires a debug build, see the prior commit. This means the only tested config right now is the one mentioned in the suppression file.
maflcko force-pushed on Mar 18, 2026maflcko commented at 9:29 AM on March 18, 2026: memberReordered the last two commits and pushed a doc-only update.
l0rinc commented at 9:35 AM on March 18, 2026: contributorACK fa70b9ebaa46b5fedcc02200626499d25762d44a
fanquake commented at 4:24 AM on March 23, 2026: memberACK fa70b9ebaa46b5fedcc02200626499d25762d44a - also checked that it doesn't currently work under aarch64.
fanquake merged this on Mar 23, 2026fanquake closed this on Mar 23, 2026fanquake referenced this in commit 6993aa1915 on Mar 23, 2026fanquake referenced this in commit 198bc4da87 on Mar 23, 2026fanquake referenced this in commit d171afa9e8 on Mar 23, 2026maflcko deleted the branch on Mar 24, 2026
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