Setup the project and the CI configuration. - #1
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iamluc
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May 27, 2024
Direct leak of 24 byte(s) in 1 object(s) allocated from:
#0 0xffff8dfed43b in malloc (/usr/lib/aarch64-linux-gnu/libasan.so.5+0xcf43b)
#1 0xffff81eb8f4f in __cxa_thread_atexit_impl /home/circleci/datadog/tmp/build_extension/ext/ddtrace.c:560
#2 0xffff82ed7c8b in std::sys::unix::thread_local_dtor::register_dtor::ha7abe21b2e8f0491 library/std/src/sys/unix/thread_local_dtor.rs:31
#3 0xffff81ec332b in _dd_writer_loop /home/circleci/datadog/tmp/build_extension/ext/coms.c:1053
#4 0xffff8db7a7e3 in start_thread /build/glibc-tVuo8E/glibc-2.28/nptl/pthread_create.c:486
#5 0xffff8b16a70b (/lib/aarch64-linux-gnu/libc.so.6+0xcf70b)
SUMMARY: AddressSanitizer: 24 byte(s) leaked in 1 allocation(s).
iamluc
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May 27, 2024
Direct leak of 24 byte(s) in 1 object(s) allocated from:
#0 0xffff8dfed43b in malloc (/usr/lib/aarch64-linux-gnu/libasan.so.5+0xcf43b)
#1 0xffff81eb8f4f in __cxa_thread_atexit_impl /home/circleci/datadog/tmp/build_extension/ext/ddtrace.c:560
#2 0xffff82ed7c8b in std::sys::unix::thread_local_dtor::register_dtor::ha7abe21b2e8f0491 library/std/src/sys/unix/thread_local_dtor.rs:31
#3 0xffff81ec332b in _dd_writer_loop /home/circleci/datadog/tmp/build_extension/ext/coms.c:1053
#4 0xffff8db7a7e3 in start_thread /build/glibc-tVuo8E/glibc-2.28/nptl/pthread_create.c:486
#5 0xffff8b16a70b (/lib/aarch64-linux-gnu/libc.so.6+0xcf70b)
SUMMARY: AddressSanitizer: 24 byte(s) leaked in 1 allocation(s).
bwoebi
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May 28, 2024
…nd trace sender (#2672) * Make use of the sidecar thread safe * Collect trace_api.{requests,responses,errors} in the background trace sender * Fix test * Fix memory leak: Direct leak of 24 byte(s) in 1 object(s) allocated from: #0 0xffff8dfed43b in malloc (/usr/lib/aarch64-linux-gnu/libasan.so.5+0xcf43b) #1 0xffff81eb8f4f in __cxa_thread_atexit_impl /home/circleci/datadog/tmp/build_extension/ext/ddtrace.c:560 #2 0xffff82ed7c8b in std::sys::unix::thread_local_dtor::register_dtor::ha7abe21b2e8f0491 library/std/src/sys/unix/thread_local_dtor.rs:31 #3 0xffff81ec332b in _dd_writer_loop /home/circleci/datadog/tmp/build_extension/ext/coms.c:1053 #4 0xffff8db7a7e3 in start_thread /build/glibc-tVuo8E/glibc-2.28/nptl/pthread_create.c:486 #5 0xffff8b16a70b (/lib/aarch64-linux-gnu/libc.so.6+0xcf70b) SUMMARY: AddressSanitizer: 24 byte(s) leaked in 1 allocation(s). * Update libdatadog * Fix tests * Try running system tests with sidecar sender Signed-off-by: Bob Weinand <bob.weinand@datadoghq.com> * Don't explicitly flush the bgs telemetry data * Improve test stability * Try to run system-tests from a fork * Fix telemetry tests * Shut up instrumentation telemetry in web tests * Fix flakiness Signed-off-by: Bob Weinand <bob.weinand@datadoghq.com> * Better flaky test check Signed-off-by: Bob Weinand <bob.weinand@datadoghq.com> --------- Signed-off-by: Bob Weinand <bob.weinand@datadoghq.com> Co-authored-by: Bob Weinand <bob.weinand@datadoghq.com>
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leoromanovsky
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Apr 21, 2026
…er PR #3630 review Addresses all outstanding reviewer feedback from #3630: bwoebi: - Blocker #1: Route exposures through sidecar, zero HTTP from PHP main thread. Implements Rust ExposureState with 65K-entry LRU dedup + 1000-event batch buffer. PHP ExposureWriter uses injectable sidecarCallable routing to DDTrace\ffe_send_exposure() — fire-and-forget, never blocks evaluation. - Blocker #2: Proper documented functions in ddtrace.stub.php (not dd_trace_internal_fn). Eight DDTrace\ffe_* functions declared with PHPDoc @internal: ffe_evaluate, ffe_has_config, ffe_config_changed, ffe_load_config, ffe_send_exposure, ffe_flush_exposures, ffe_set_service_context, ffe_reset_exposure_state. Each has PHP_FUNCTION impl + arginfo + registration. - emalloc/ecalloc memory hygiene and C99 brace style consistent with existing dd-trace-php conventions. - Fire-and-forget: DataDogProvider::resolveViaFfe() invokes exposureWriter->send() and ignores return. No exception propagates from exposure path to evaluation. - Primitive-only attribute filtering in EvaluationContextNormalizer mirrors the C-side filter in ffe_evaluate (drops arrays, nulls, objects, resources). dd-oleksii: - Null targeting key preserved end-to-end (not coerced to empty string). EvaluationContextNormalizer returns [?string, array]. - do_log per-allocation hard gate: ExposureContext::fromBridgeResult() returns null when do_log=false; provider skips exposure send. - OTel feature_flag.evaluations counter with OBSV-02 attributes (key, variant, reason, error.type, allocation_key). MetricsCounter injectable callable, no open-telemetry/api composer dep per CLAUDE.md. Gated on DD_METRICS_OTEL_ENABLED. Fires on every evaluation including errors. - PR split into four independently-reviewable phases (roadmap in staging repo). realFlowControl: - ZTS per-thread FFE state: declined for v1 (NTS-only per PROJECT.md). Global Mutex<FfeState> is correct for NTS. Tracked as v2 requirement. Architecture changes: - Remove src/DDTrace/FeatureFlags/ (old in-process HTTP architecture). LRUCache.php, ExposureCache.php, ExposureWriter.php, Provider.php, FlagEvalMetrics.php — all replaced by Rust-sidecar pipeline. - Remove tests/FeatureFlags/ (tests covered by staging PHPUnit suite). - Add src/DDTrace/OpenFeature/ with 9 classes: BridgeResultMapper, ContextFlattener, DataDogProvider (rewritten), EvaluationContextNormalizer, ExposureContext, ExposureWriter, MetricsCounter, OpenFeatureLifecycleCompatibility, ProviderLifecycle. - Add tests/OpenFeature/ with 7 test files, 143 tests. - components-rs/ffe.rs: add ExposureState + extern C functions for enqueue_exposure, flush_exposures, set_service_context, reset_exposure_state, free_flush_result. Uses lru crate 0.12. - components-rs/Cargo.toml: add lru = "0.12". - composer.json: add open-feature/sdk ^2.1 as require-dev. - src/bridge/_files_tracer.php: load new OpenFeature files, remove FeatureFlags. Verification: 143/143 staging PHPUnit tests pass.
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cataphract
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Sep 15, 2026
AI summary of the mechanism: > The crash is a cross-thread use-after-free: > > 1. gRPC executes a PHP CallCredentials callback directly on a native > EventEngine worker thread. > 2. In PHP NTS, executor globals—including the profiler VM > interrupt—are process-wide. The gRPC thread can therefore consume a > pending wall-time profiling interrupt. > > 3. The profiler stack-walks that foreign thread and caches raw ThinStr > pointers in Zend’s function runtime cache. > 4. Those strings are actually owned by a Rust thread_local StringSet > belonging to that specific gRPC worker. > 5. After the worker remains idle, gRPC retires it. Its TLS destructor > frees/unmaps the string arena, but Zend’s runtime cache still contains > the pointers. > 6. A later callback/sample retrieves one of those dangling pointers > and crashes in: > ``` > ThinStr::len > StringSet::get_thin_str > collect_time > zend_call_function > plugin_get_metadata > ``` > The deterministic reproducer is one sufficiently long callback, a > 25-second idle interval allowing worker retirement, then another > callback. > > Forking, AppSec, tracing, payload stress, and allocation profiling are > not required. The profiler must avoid sampling threads that never ran > PHP request initialization and must not store thread-local arena > pointers in runtime-cache slots accessible from other threads. Stacktrace: ``` \#0 0x00007742bf3ee95c in ?? () from /lib/x86_64-linux-gnu/libc.so.6 \#1 0x00007742bf399cc2 in raise () from /lib/x86_64-linux-gnu/libc.so.6 \#2 0x00007742b87c94ec in libdd_crashtracker::collector::signal_handler_manager::chain_signal_handler () at libdatadog/libdd-crashtracker/src/collector/signal_handler_manager.rs:125 \#3 libdd_crashtracker::collector::crash_handler::handle_posix_sigaction () at libdatadog/libdd-crashtracker/src/collector/crash_handler.rs:235 \#4 <signal handler called> \#5 read<[u8; 8]> () at /rustc/17067e9ac6d7ecb70e50f92c1944e545188d2359/library/core/src/ptr/mod.rs:1380 \#6 read<[u8; 8]> () at /rustc/17067e9ac6d7ecb70e50f92c1944e545188d2359/library/core/src/ptr/mut_ptr.rs:1356 \#7 len<u8> () at /project/libdatadog/libdd-profiling/src/profiles/collections/thin_str.rs:213 \#8 inline_string_ptr () at /project/libdatadog/libdd-profiling/src/profiles/collections/thin_str.rs:235 \#9 borrow () at /project/libdatadog/libdd-profiling/src/profiles/collections/thin_str.rs:470 \#10 deref () at /project/libdatadog/libdd-profiling/src/profiles/collections/thin_str.rs:453 \#11 get_thin_str () at components-rs/../profiling/src/string_set.rs:117 \#12 get_or_insert<datadog_php::profiling::profiler::stack_walking::detail::handle_function_cache_slot::{closure_env#0}> () at components-rs/../profiling/src/profiler/stack_walking.rs:209 \#13 handle_function_cache_slot () at components-rs/../profiling/src/profiler/stack_walking.rs:466 \#14 collect_call_frame () at components-rs/../profiling/src/profiler/stack_walking.rs:417 \#15 collect_stack_sample_cached () at components-rs/../profiling/src/profiler/stack_walking.rs:362 \#16 0x00007742bea25a55 in {closure#0} () at components-rs/../profiling/src/profiler/stack_walking.rs:393 \#17 {closure#0}<datadog_php::profiling::string_set::StringSet, datadog_php::profiling::profiler::stack_walking::detail::collect_stack_sample::{closure_env#0}, core::result::Result<datadog_php::profiling::profiler::backtrace::Backtrace, datadog_php::profiling::profiler::stack_walking::CollectStackSampleError>> () at components-rs/../profiling/src/lib.rs:533 \#18 map<core::cell::RefMut<datadog_php::profiling::string_set::StringSet>, core::cell::BorrowMutError, core::result::Result<datadog_php::profiling::profiler::backtrace::Backtrace, datadog_php::profiling::profiler::stack_walking::CollectStackSampleError>, datadog_php::profiling::{impl#2}::try_with_borrow_mut::{closure#0}::{closure_env#0}<datadog_php::profiling::string_set::StringSet, datadog_php::profiling::profiler::stack_walking::detail::collect_stack_sample::{closure_env#0}, core::result::Result<datadog_php::profiling::profiler::backtrace::Backtrace, datadog_php::profiling::profiler::stack_walking::CollectStackSampleError>>> () at /rustc/17067e9ac6d7ecb70e50f92c1944e545188d2359/library/core/src/result.rs:773 \#19 {closure#0}<datadog_php::profiling::string_set::StringSet, datadog_php::profiling::profiler::stack_walking::detail::collect_stack_sample::{closure_env#0}, core::result::Result<datadog_php::profiling::profiler::backtrace::Backtrace, datadog_php::profiling::profiler::stack_walking::CollectStackSampleError>> () at components-rs/../profiling/src/lib.rs:533 \#20 try_with<core::cell::RefCell<datadog_php::profiling::string_set::StringSet>, datadog_php::profiling::{impl#2}::try_with_borrow_mut::{closure_env#0}<datadog_php::profiling::string_set::StringSet, datadog_php::profiling::profiler::stack_walking::detail::collect_stack_sample::{closure_env#0}, core::result::Result<datadog_php::profiling::profiler::backtrace::Backtrace, datadog_php::profiling::profiler::stack_walking::CollectStackSampleError>>, core::result::Result<core::result::Result<datadog_php::profiling::profiler::backtrace::Backtrace, datadog_php::profiling::profiler::stack_walking::CollectStackSampleError>, core::cell::BorrowMutError>> () at /rustc/17067e9ac6d7ecb70e50f92c1944e545188d2359/library/std/src/thread/local.rs:311 \#21 try_with_borrow_mut<datadog_php::profiling::string_set::StringSet, datadog_php::profiling::profiler::stack_walking::detail::collect_stack_sample::{closure_env#0}, core::result::Result<datadog_php::profiling::profiler::backtrace::Backtrace, datadog_php::profiling::profiler::stack_walking::CollectStackSampleError>> () at components-rs/../profiling/src/lib.rs:532 \#22 collect_stack_sample () at components-rs/../profiling/src/profiler/stack_walking.rs:393 \#23 0x00007742bea2cf55 in collect_stack_sample_timed () at components-rs/../profiling/src/profiler/mod.rs:1158 \#24 0x00007742bea2d087 in collect_time () at components-rs/../profiling/src/profiler/mod.rs:1182 \#25 0x00007742bea35d9a in ddog_php_prof_interrupt_function_wrapper () at components-rs/../profiling/src/wall_time.rs:308 \#26 0x00005b150b5ba079 in zend_interrupt_helper_SPEC () at /root/php/sources/8.5.0/Zend/zend_vm_execute.h:4027 \#27 0x00005b150b69fb6f in execute_ex (ex=0x7742bf013590) at /root/php/sources/8.5.0/Zend/zend_vm_execute.h:116152 \#28 0x00005b150b57cea5 in zend_call_function (fci=0x5b15381ade70, fci_cache=0x5b1538220230) at /root/php/sources/8.5.0/Zend/zend_execute_API.c:1010 \#29 0x00007742be4d7e7e in plugin_get_metadata (ptr=0x7742bf003190, context=..., cb=<optimized out>, user_data=<optimized out>, creds_md=0x77427a7fb0a0, num_creds_md=0x77427a7fb068, status=0x77427a7fb064, error_details=0x77427a7fb058) at /tmp/grpc-php-8.5-release.EUD4iV/src/php/ext/grpc/call_credentials.c:169 \#30 0x00007742be03098f in grpc_plugin_credentials::GetRequestMetadata (this=0x5b153821d660, initial_metadata=..., args=<optimized out>) at /tmp/grpc-php-8.5-release.EUD4iV/src/core/credentials/call/plugin/plugin_credentials.cc:162 \#31 0x00007742be19c295 in grpc_core::ClientAuthFilter::GetMetadataFromCreds (this=<optimized out>, creds=..., md=...) at ./src/core/filter/auth/auth_filters.h:61 \#32 grpc_core::ClientAuthFilter::GetCallCredsMetadata(std::__1::unique_ptr<grpc_metadata_batch, grpc_core::Arena::PooledDeleter>)::{lambda()#1}::operator()()::{lambda()#1}::operator()() const (this=<optimized out>) at ./src/core/filter/auth/auth_filters.h:80 \#33 grpc_core::promise_detail::PromiseLike<grpc_core::Map<grpc_core::ArenaPromise<absl::lts_20250512::StatusOr<std::__1::unique_ptr<grpc_metadata_batch, grpc_core::Arena::PooledDeleter> > >, grpc_core::ClientAuthFilter::GetMetadataFromCreds(grpc_core::RefCountedPtr<grpc_call_credentials>, std::__1::unique_ptr<grpc_metadata_batch, grpc_core::Arena::PooledDeleter>)::{lambda(absl::lts_20250512::StatusOr<std::__1::unique_ptr<grpc_metadata_batch, grpc_core::Arena::PooledDeleter> >)#1}>, void>::PromiseLike<grpc_core::ClientAuthFilter::GetCallCredsMetadata(std::__1::unique_ptr<grpc_metadata_batch, grpc_core::Arena::PooledDeleter>)::{lambda()#1}::operator()()::{lambda()#1}>(std::__1::in_place_t, grpc_core::ClientAuthFilter::GetCallCredsMetadata(std::__1::unique_ptr<grpc_metadata_batch, grpc_core::Arena::PooledDeleter>)::{lambda()#1}::operator()()::{lambda()#1}&&) (this=0x77427a7fb270, f=...) at ./src/core/lib/promise/detail/promise_like.h:219 \#34 grpc_core::promise_detail::PromiseFactoryImpl<grpc_core::promise_detail::OnceToken, grpc_core::ClientAuthFilter::GetCallCredsMetadata(std::__1::unique_ptr<grpc_metadata_batch, grpc_core::Arena::PooledDeleter>)::{lambda()#1}::operator()()::{lambda()#1}>(grpc_core::promise_detail::OnceToken, grpc_core::ClientAuthFilter::GetCallCredsMetadata(std::__1::unique_ptr<grpc_metadata_batch, grpc_core::Arena::PooledDeleter>)::{lambda()#1}::operator()()::{lambda()#1}&&) (f=...) at ./src/core/lib/promise/detail/promise_factory.h:221 ```
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This PR adds the initial setup and aims to setup the CI in PHP versions from 5.6 to 7.2.
Ping @palazzem