1.26.0

All products

Changed

• Write sidecar logs when it runs in thread mode #4235
• datadog-setup.php now reports that macOS is not supported #4284 (thank you @staabm for the report!)

Fixed

• Stop spawning a new sidecar while a PHP worker shuts down, which left orphaned sidecar processes #4164
• Correctly handle a thread-mode sidecar that takes over as the new master process #4270
• Fix sidecar telemetry lock inversions, premature sidecar idle shutdown and a hang on Windows when the sidecar pipe is full #4219
• Avoid a race between the SSI loader's background dlclose() and process exit #4229
• Crash reports now respect proxy environment variables, and the agent host/port takes priority over a UDS socket for error tracking uploads DataDog/libdatadog#2462, DataDog/libdatadog#2633
• Authenticate sidecar connections and shared memory (peer credential checks, trusted shared memory directory), fixing GHSA-j3g8-6962-2xqq and GHSA-fmrj-jm6v-j549 DataDog/libdatadog#2551

Internal

• Update Rust dependencies to fix RustSec advisories; building from source now requires Rust 1.91.1 #4188
• Publish the OTel process context during MINIT #4213

Tracer

Added

• Support OTel sampling (ot.th/ot.rv tracestate) in distributed tracing #4177

Changed

• Update the default query string obfuscation regex, fixing a security vulnerability, as described in GHSA-49fg-59cp-2hqj #4282
• Improve stability of the tracer on macOS #4187
• Client-side stats obfuscation now follows the agent's full SQL obfuscation config DataDog/libdatadog#2535

Fixed

• Fix crashes at shutdown: on PHP 7.0/7.1 ZTS #4185, in atexit after ddtrace was unloaded #4197, in the zend extension shutdown #4218, and in remote config shutdown #4220
• Fix rare use-after-frees in the in-process background sender, during request processing #4189 and at shutdown when the writer thread gets detached #4278 (thank you @alexandre-daubois!)
• Make the flush on SIGTERM/SIGINT safe against crashes in the allocator #4222
• Fix a crash when walking the stack after a generator was destroyed during an aborted call #4272
• Fix JIT blacklisting on PHP 8.5+ and for generator memory #4226, #4236
• Fix multi-hooking with dynamic payloads and a crash when subclassing HookData #4236
• Do not start the background writer when the tracer is disabled during MINIT #4233
• Avoid starvation of synchronous flushes with the in-process background sender #4224
• Fix sidecar connection from threads impersonating another user under Windows #4280
• Make Windows remote config notifications safe against unloading ddtrace #4219
• Evaluate the sampling decision once per trace chunk during serialization #4219
• Set peer.service sources in the Predis and PDO connect integrations #4285, #4286 (thank you @redpanda for the reports!)
• Report http.status_code for Guzzle requests that throw on non-2xx responses, and fix DD_TRACE_HTTP_CLIENT_ERROR_STATUSES handling #4287 (thank you @fbaumann-ph for the report!)
• Fix client-side stats: http.endpoint takes precedence over http.route again, and deeply nested SQL can no longer exhaust the stack during obfuscation DataDog/libdatadog#2582, DataDog/libdatadog#2441
• Fix a possible divide-by-zero panic in the shared rate limiter #4259

Internal

• Add the _dd.sdk.otlp_export marker to trace chunks #4240

Profiling

Changed

• Speed up sample processing, reducing dropped samples under load #4194

Fixed

• Fix several I/O profiling issues: poll readiness, fread/fwrite byte counts, RELRO protection after GOT patching, and loader bounds checks #4156
• Fix a wall-time crash after ext-grpc runs PHP code on a native thread; I/O profiling is disabled when ext-grpc is loaded #4198
• Report allocator-rounded allocation sizes and fix upscaling of samples with varying allocation sizes #4230
• Block signals before spawning profiler helper threads #4224

AppSec

Changed

• Update libddwaf to 2.1.0 and build it from source for PECL packages, fixing offline builds #4203 (thank you @remicollet for the report!)
• Update vendored libxml2 to 2.15.4 #4224

Fixed

• Fix loading AppSec on musl ZTS builds (e.g. Alpine, FrankenPHP), and a crash on ZTS thread exit #4180
• Fix protocol failures caused by empty AppSec data #4216