[Bug]: Segmentation fault when using fibers in php 8.1

[DuckThom]

Bug report

When running a CLI script with a Fiber in it, the php process crashes with a Segmentation Fault. When disabling the datadog modules, this issue is gone.

This is happening both on amd64 and arm64 platforms.

root@f90a5a2c8233:/# php -v
PHP 8.1.2-1ubuntu2.14 (cli) (built: Aug 18 2023 11:41:11) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.2, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.2-1ubuntu2.14, Copyright (c), by Zend Technologies
    with ddtrace v0.96.0, Copyright Datadog, by Datadog
    with datadog-profiling v0.96.0, Copyright Datadog, by Datadog
    with ddappsec v0.96.0, Copyright Datadog, by Datadog

root@f90a5a2c8233:/# php script.php
Segmentation fault

Test script:

<?php

$fiber = new Fiber( function() {  $a = 1; } );
$return = $fiber->start();

Error in GDB:

Starting program: /usr/bin/php8.1 script.php
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/aarch64-linux-gnu/libthread_db.so.1".
[New Thread 0xfffff2d4dec0 (LWP 10867)]
[New Thread 0xffffeab3dec0 (LWP 10868)]

Thread 1 "php8.1" received signal SIGSEGV, Segmentation fault.
zif_dd_wrap_fiber_entry_call (execute_data=0x0, return_value=<optimized out>) at /home/circleci/datadog/tmp/build_extension/ext/handlers_fiber.c:58
58	        fiber->context.reserved[dd_resource_handle] = stack->fiber_initial_execute_data;

PHP version

8.1.2-1ubuntu2.14

Tracer or profiler version

0.96.0

Installed extensions

[PHP Modules]
calendar
Core
ctype
datadog-profiling
date
ddappsec
ddtrace
exif
FFI
fileinfo
filter
ftp
gettext
hash
iconv
json
libxml
openssl
pcntl
pcre
PDO
Phar
posix
readline
Reflection
session
shmop
sockets
sodium
SPL
standard
sysvmsg
sysvsem
sysvshm
tokenizer
Zend OPcache
zlib

[Zend Modules]
Zend OPcache
datadog-profiling
ddappsec
ddtrace

Output of phpinfo()

ddtrace


Datadog PHP tracer extension
For help, check out the documentation at https://docs.datadoghq.com/tracing/languages/php/
(c) Datadog 2020

Datadog tracing support => disabled
Version => 0.96.0
DATADOG TRACER CONFIGURATION => {
    "date": "2024-01-15T16:02:25Z",
    "os_name": "Linux f90a5a2c8233 6.5.11-linuxkit #1 SMP PREEMPT Wed Dec  6 17:08:31 UTC 2023 aarch64",
    "os_version": "6.5.11-linuxkit",
    "version": "0.96.0",
    "lang": "php",
    "lang_version": "8.1.26",
    "env": null,
    "enabled": true,
    "service": null,
    "enabled_cli": false,
    "agent_url": "http:\/\/localhost:8126",
    "debug": false,
    "analytics_enabled": false,
    "sample_rate": -1,
    "sampling_rules": [],
    "tags": [],
    "service_mapping": [],
    "distributed_tracing_enabled": true,
    "priority_sampling_enabled": true,
    "dd_version": null,
    "architecture": "aarch64",
    "sapi": "cli",
    "datadog.trace.request_init_hook": "\/opt\/datadog\/dd-library\/0.96.0\/dd-trace-sources\/bridge\/dd_wrap_autoloader.php",
    "open_basedir_configured": false,
    "uri_fragment_regex": null,
    "uri_mapping_incoming": null,
    "uri_mapping_outgoing": null,
    "auto_flush_enabled": false,
    "generate_root_span": true,
    "http_client_split_by_domain": false,
    "measure_compile_time": true,
    "report_hostname_on_root_span": false,
    "traced_internal_functions": null,
    "auto_prepend_file_configured": false,
    "integrations_disabled": "default",
    "enabled_from_env": false,
    "opcache.file_cache": null,
    "agent_error": "Failed to connect to localhost port 8126 after 0 ms: Connection refused"
}

Directive => Local Value => Master Value
ddtrace.disable => Off => Off
ddtrace.cgroup_file => /proc/self/cgroup => /proc/self/cgroup
datadog.trace.request_init_hook => /opt/datadog/dd-library/0.96.0/dd-trace-sources/bridge/dd_wrap_autoloader.php => /opt/datadog/dd-library/0.96.0/dd-trace-sources/bridge/dd_wrap_autoloader.php
ddtrace.request_init_hook => /opt/datadog/dd-library/0.96.0/dd-trace-sources/bridge/dd_wrap_autoloader.php => /opt/datadog/dd-library/0.96.0/dd-trace-sources/bridge/dd_wrap_autoloader.php
datadog.trace.agent_url => no value => no value
datadog.agent_host => no value => no value
datadog.dogstatsd_url => no value => no value
datadog.api_key => no value => no value
datadog.distributed_tracing => On => On
datadog.dogstatsd_port => 8125 => 8125
datadog.env => no value => no value
datadog.autofinish_spans => Off => Off
datadog.trace.url_as_resource_names_enabled => On => On
datadog.http_server_route_based_naming => On => On
datadog.integrations_disabled => default => default
datadog.priority_sampling => On => On
datadog.service => no value => no value
datadog.service_name => no value => no value
datadog.service_mapping => no value => no value
datadog.tags => no value => no value
datadog.trace.global_tags => no value => no value
datadog.trace.agent_port => 0 => 0
datadog.trace.analytics_enabled => Off => Off
datadog.trace.append_trace_ids_to_logs => Off => Off
datadog.trace.auto_flush_enabled => Off => Off
datadog.trace.cli_enabled => Off => Off
datadog.trace.measure_compile_time => On => On
datadog.trace.debug => Off => Off
datadog.trace.enabled => Off => On
datadog.instrumentation_telemetry_enabled => On => On
datadog.trace.health_metrics_enabled => Off => Off
datadog.trace.health_metrics_heartbeat_sample_rate => 0.001 => 0.001
datadog.trace.db_client_split_by_instance => Off => Off
datadog.trace.http_client_split_by_domain => Off => Off
datadog.trace.redis_client_split_by_host => Off => Off
datadog.trace.memory_limit => no value => no value
datadog.trace.report_hostname => Off => Off
datadog.trace.flush_collect_cycles => Off => Off
datadog.trace.laravel_queue_distributed_tracing => On => On
datadog.trace.remove_root_span_laravel_queue => On => On
datadog.trace.remove_autoinstrumentation_orphans => Off => Off
datadog.trace.resource_uri_fragment_regex => no value => no value
datadog.trace.resource_uri_mapping_incoming => no value => no value
datadog.trace.resource_uri_mapping_outgoing => no value => no value
datadog.trace.resource_uri_query_param_allowed => no value => no value
datadog.trace.http_url_query_param_allowed => * => *
datadog.trace.http_post_data_param_allowed => no value => no value
datadog.trace.rate_limit => 0 => 0
datadog.trace.sample_rate => -1 => -1
datadog.sampling_rate => -1 => -1
datadog.trace.sampling_rules => [] => []
datadog.trace.sampling_rules_format => regex => regex
datadog.span_sampling_rules => [] => []
datadog.span_sampling_rules_file => no value => no value
datadog.trace.header_tags => no value => no value
datadog.trace.x_datadog_tags_max_length => 512 => 512
datadog.trace.peer_service_mapping => no value => no value
datadog.trace.peer_service_defaults_enabled => Off => Off
datadog.trace.remove_integration_service_names_enabled => Off => Off
datadog.trace.propagate_service => Off => Off
datadog.trace.propagation_style_extract => tracecontext,Datadog,B3,B3 single header => tracecontext,Datadog,B3,B3 single header
datadog.propagation_style_extract => tracecontext,Datadog,B3,B3 single header => tracecontext,Datadog,B3,B3 single header
datadog.trace.propagation_style_inject => tracecontext,Datadog => tracecontext,Datadog
datadog.propagation_style_inject => tracecontext,Datadog => tracecontext,Datadog
datadog.trace.propagation_style => tracecontext,Datadog => tracecontext,Datadog
datadog.trace.traced_internal_functions => no value => no value
datadog.trace.agent_timeout => 500 => 500
datadog.trace.agent_connect_timeout => 100 => 100
datadog.trace.debug_prng_seed => -1 => -1
datadog.log_backtrace => Off => Off
datadog.trace.generate_root_span => On => On
datadog.trace.spans_limit => 1000 => 1000
datadog.trace.128_bit_traceid_generation_enabled => On => On
datadog.trace.128_bit_traceid_logging_enabled => Off => Off
datadog.trace.agent_max_consecutive_failures => 3 => 3
datadog.trace.agent_attempt_retry_time_msec => 5000 => 5000
datadog.trace.bgs_connect_timeout => 2000 => 2000
datadog.trace.bgs_timeout => 5000 => 5000
datadog.trace.agent_flush_interval => 5000 => 5000
datadog.trace.agent_flush_after_n_requests => 10 => 10
datadog.trace.shutdown_timeout => 5000 => 5000
datadog.trace.startup_logs => On => On
datadog.trace.once_logs => On => On
datadog.trace.agent_debug_verbose_curl => Off => Off
datadog.trace.debug_curl_output => Off => Off
datadog.trace.beta_high_memory_pressure_percent => 80 => 80
datadog.trace.sidecar_trace_sender => Off => Off
datadog.trace.agentless => Off => Off
datadog.trace.warn_legacy_dd_trace => On => On
datadog.trace.retain_thread_capabilities => Off => Off
datadog.version => no value => no value
datadog.trace.obfuscation_query_string_regexp => (?i)(?:(?:"|%22)?)(?:(?:old[-_]?|new[-_]?)?p(?:ass)?w(?:or)?d(?:1|2)?|pass(?:[-_]?phrase)?|secret|(?:api[-_]?|private[-_]?|public[-_]?|access[-_]?|secret[-_]?|app(?:lication)?[-_]?)key(?:[-_]?id)?|token|consumer[-_]?(?:id|key|secret)|sign(?:ed|ature)?|auth(?:entication|orization)?)(?:(?:\s|%20)*(?:=|%3D)[^&]+|(?:"|%22)(?:\s|%20)*(?::|%3A)(?:\s|%20)*(?:"|%22)(?:%2[^2]|%[^2]|[^"%])+(?:"|%22))|(?:bearer(?:\s|%20)+[a-z0-9._\-]+|token(?::|%3A)[a-z0-9]{13}|gh[opsu]_[0-9a-zA-Z]{36}|ey[I-L](?:[\w=-]|%3D)+\.ey[I-L](?:[\w=-]|%3D)+(?:\.(?:[\w.+/=-]|%3D|%2F|%2B)+)?|-{5}BEGIN(?:[a-z\s]|%20)+PRIVATE(?:\s|%20)KEY-{5}[^\-]+-{5}END(?:[a-z\s]|%20)+PRIVATE(?:\s|%20)KEY(?:-{5})?(?:\n|%0A)?|(?:ssh-(?:rsa|dss)|ecdsa-[a-z0-9]+-[a-z0-9]+)(?:\s|%20|%09)+(?:[a-z0-9/.+]|%2F|%5C|%2B){100,}(?:=|%3D)*(?:(?:\s|%20|%09)+[a-z0-9._-]+)?) => (?i)(?:(?:"|%22)?)(?:(?:old[-_]?|new[-_]?)?p(?:ass)?w(?:or)?d(?:1|2)?|pass(?:[-_]?phrase)?|secret|(?:api[-_]?|private[-_]?|public[-_]?|access[-_]?|secret[-_]?|app(?:lication)?[-_]?)key(?:[-_]?id)?|token|consumer[-_]?(?:id|key|secret)|sign(?:ed|ature)?|auth(?:entication|orization)?)(?:(?:\s|%20)*(?:=|%3D)[^&]+|(?:"|%22)(?:\s|%20)*(?::|%3A)(?:\s|%20)*(?:"|%22)(?:%2[^2]|%[^2]|[^"%])+(?:"|%22))|(?:bearer(?:\s|%20)+[a-z0-9._\-]+|token(?::|%3A)[a-z0-9]{13}|gh[opsu]_[0-9a-zA-Z]{36}|ey[I-L](?:[\w=-]|%3D)+\.ey[I-L](?:[\w=-]|%3D)+(?:\.(?:[\w.+/=-]|%3D|%2F|%2B)+)?|-{5}BEGIN(?:[a-z\s]|%20)+PRIVATE(?:\s|%20)KEY-{5}[^\-]+-{5}END(?:[a-z\s]|%20)+PRIVATE(?:\s|%20)KEY(?:-{5})?(?:\n|%0A)?|(?:ssh-(?:rsa|dss)|ecdsa-[a-z0-9]+-[a-z0-9]+)(?:\s|%20|%09)+(?:[a-z0-9/.+]|%2F|%5C|%2B){100,}(?:=|%3D)*(?:(?:\s|%20|%09)+[a-z0-9._-]+)?)
datadog.trace.client_ip_enabled => Off => Off
datadog.trace.client_ip_header => no value => no value
datadog.trace.forked_process => On => On
datadog.trace.hook_limit => 100 => 100
datadog.trace.agent_max_payload_size => 52428800 => 52428800
datadog.trace.agent_stack_initial_size => 131072 => 131072
datadog.trace.agent_stack_backlog => 12 => 12
datadog.trace.propagate_user_id_default => Off => Off
datadog.dbm_propagation_mode => disabled => disabled
datadog.trace.wordpress_additional_actions => no value => no value
datadog.trace.wordpress_callbacks => Off => Off
datadog.trace.wordpress_enhanced_integration => Off => Off
datadog.trace.otel_enabled => Off => Off
datadog.trace.amqp_enabled => On => On
datadog.trace.amqp_analytics_enabled => Off => Off
datadog.amqp_analytics_enabled => Off => Off
datadog.trace.amqp_analytics_sample_rate => 1 => 1
datadog.amqp_analytics_sample_rate => 1 => 1
datadog.trace.cakephp_enabled => On => On
datadog.trace.cakephp_analytics_enabled => Off => Off
datadog.cakephp_analytics_enabled => Off => Off
datadog.trace.cakephp_analytics_sample_rate => 1 => 1
datadog.cakephp_analytics_sample_rate => 1 => 1
datadog.trace.codeigniter_enabled => On => On
datadog.trace.codeigniter_analytics_enabled => Off => Off
datadog.codeigniter_analytics_enabled => Off => Off
datadog.trace.codeigniter_analytics_sample_rate => 1 => 1
datadog.codeigniter_analytics_sample_rate => 1 => 1
datadog.trace.curl_enabled => On => On
datadog.trace.curl_analytics_enabled => Off => Off
datadog.curl_analytics_enabled => Off => Off
datadog.trace.curl_analytics_sample_rate => 1 => 1
datadog.curl_analytics_sample_rate => 1 => 1
datadog.trace.drupal_enabled => On => On
datadog.trace.drupal_analytics_enabled => Off => Off
datadog.drupal_analytics_enabled => Off => Off
datadog.trace.drupal_analytics_sample_rate => 1 => 1
datadog.drupal_analytics_sample_rate => 1 => 1
datadog.trace.elasticsearch_enabled => On => On
datadog.trace.elasticsearch_analytics_enabled => Off => Off
datadog.elasticsearch_analytics_enabled => Off => Off
datadog.trace.elasticsearch_analytics_sample_rate => 1 => 1
datadog.elasticsearch_analytics_sample_rate => 1 => 1
datadog.trace.eloquent_enabled => On => On
datadog.trace.eloquent_analytics_enabled => Off => Off
datadog.eloquent_analytics_enabled => Off => Off
datadog.trace.eloquent_analytics_sample_rate => 1 => 1
datadog.eloquent_analytics_sample_rate => 1 => 1
datadog.trace.guzzle_enabled => On => On
datadog.trace.guzzle_analytics_enabled => Off => Off
datadog.guzzle_analytics_enabled => Off => Off
datadog.trace.guzzle_analytics_sample_rate => 1 => 1
datadog.guzzle_analytics_sample_rate => 1 => 1
datadog.trace.laminas_enabled => On => On
datadog.trace.laminas_analytics_enabled => Off => Off
datadog.laminas_analytics_enabled => Off => Off
datadog.trace.laminas_analytics_sample_rate => 1 => 1
datadog.laminas_analytics_sample_rate => 1 => 1
datadog.trace.laravel_enabled => On => On
datadog.trace.laravel_analytics_enabled => Off => Off
datadog.laravel_analytics_enabled => Off => Off
datadog.trace.laravel_analytics_sample_rate => 1 => 1
datadog.laravel_analytics_sample_rate => 1 => 1
datadog.trace.laravelqueue_enabled => On => On
datadog.trace.laravelqueue_analytics_enabled => Off => Off
datadog.laravelqueue_analytics_enabled => Off => Off
datadog.trace.laravelqueue_analytics_sample_rate => 1 => 1
datadog.laravelqueue_analytics_sample_rate => 1 => 1
datadog.trace.logs_enabled => Off => Off
datadog.logs_injection => Off => Off
datadog.trace.logs_analytics_enabled => Off => Off
datadog.logs_analytics_enabled => Off => Off
datadog.trace.logs_analytics_sample_rate => 1 => 1
datadog.logs_analytics_sample_rate => 1 => 1
datadog.trace.lumen_enabled => On => On
datadog.trace.lumen_analytics_enabled => Off => Off
datadog.lumen_analytics_enabled => Off => Off
datadog.trace.lumen_analytics_sample_rate => 1 => 1
datadog.lumen_analytics_sample_rate => 1 => 1
datadog.trace.magento_enabled => On => On
datadog.trace.magento_analytics_enabled => Off => Off
datadog.magento_analytics_enabled => Off => Off
datadog.trace.magento_analytics_sample_rate => 1 => 1
datadog.magento_analytics_sample_rate => 1 => 1
datadog.trace.memcache_enabled => On => On
datadog.trace.memcache_analytics_enabled => Off => Off
datadog.memcache_analytics_enabled => Off => Off
datadog.trace.memcache_analytics_sample_rate => 1 => 1
datadog.memcache_analytics_sample_rate => 1 => 1
datadog.trace.memcached_enabled => On => On
datadog.trace.memcached_analytics_enabled => Off => Off
datadog.memcached_analytics_enabled => Off => Off
datadog.trace.memcached_analytics_sample_rate => 1 => 1
datadog.memcached_analytics_sample_rate => 1 => 1
datadog.trace.mongo_enabled => On => On
datadog.trace.mongo_analytics_enabled => Off => Off
datadog.mongo_analytics_enabled => Off => Off
datadog.trace.mongo_analytics_sample_rate => 1 => 1
datadog.mongo_analytics_sample_rate => 1 => 1
datadog.trace.mongodb_enabled => On => On
datadog.trace.mongodb_analytics_enabled => Off => Off
datadog.mongodb_analytics_enabled => Off => Off
datadog.trace.mongodb_analytics_sample_rate => 1 => 1
datadog.mongodb_analytics_sample_rate => 1 => 1
datadog.trace.mysqli_enabled => On => On
datadog.trace.mysqli_analytics_enabled => Off => Off
datadog.mysqli_analytics_enabled => Off => Off
datadog.trace.mysqli_analytics_sample_rate => 1 => 1
datadog.mysqli_analytics_sample_rate => 1 => 1
datadog.trace.nette_enabled => On => On
datadog.trace.nette_analytics_enabled => Off => Off
datadog.nette_analytics_enabled => Off => Off
datadog.trace.nette_analytics_sample_rate => 1 => 1
datadog.nette_analytics_sample_rate => 1 => 1
datadog.trace.pcntl_enabled => On => On
datadog.trace.pcntl_analytics_enabled => Off => Off
datadog.pcntl_analytics_enabled => Off => Off
datadog.trace.pcntl_analytics_sample_rate => 1 => 1
datadog.pcntl_analytics_sample_rate => 1 => 1
datadog.trace.pdo_enabled => On => On
datadog.trace.pdo_analytics_enabled => Off => Off
datadog.pdo_analytics_enabled => Off => Off
datadog.trace.pdo_analytics_sample_rate => 1 => 1
datadog.pdo_analytics_sample_rate => 1 => 1
datadog.trace.phpredis_enabled => On => On
datadog.trace.phpredis_analytics_enabled => Off => Off
datadog.phpredis_analytics_enabled => Off => Off
datadog.trace.phpredis_analytics_sample_rate => 1 => 1
datadog.phpredis_analytics_sample_rate => 1 => 1
datadog.trace.predis_enabled => On => On
datadog.trace.predis_analytics_enabled => Off => Off
datadog.predis_analytics_enabled => Off => Off
datadog.trace.predis_analytics_sample_rate => 1 => 1
datadog.predis_analytics_sample_rate => 1 => 1
datadog.trace.psr18_enabled => On => On
datadog.trace.psr18_analytics_enabled => Off => Off
datadog.psr18_analytics_enabled => Off => Off
datadog.trace.psr18_analytics_sample_rate => 1 => 1
datadog.psr18_analytics_sample_rate => 1 => 1
datadog.trace.roadrunner_enabled => On => On
datadog.trace.roadrunner_analytics_enabled => Off => Off
datadog.roadrunner_analytics_enabled => Off => Off
datadog.trace.roadrunner_analytics_sample_rate => 1 => 1
datadog.roadrunner_analytics_sample_rate => 1 => 1
datadog.trace.sqlsrv_enabled => On => On
datadog.trace.sqlsrv_analytics_enabled => Off => Off
datadog.sqlsrv_analytics_enabled => Off => Off
datadog.trace.sqlsrv_analytics_sample_rate => 1 => 1
datadog.sqlsrv_analytics_sample_rate => 1 => 1
datadog.trace.slim_enabled => On => On
datadog.trace.slim_analytics_enabled => Off => Off
datadog.slim_analytics_enabled => Off => Off
datadog.trace.slim_analytics_sample_rate => 1 => 1
datadog.slim_analytics_sample_rate => 1 => 1
datadog.trace.symfony_enabled => On => On
datadog.trace.symfony_analytics_enabled => Off => Off
datadog.symfony_analytics_enabled => Off => Off
datadog.trace.symfony_analytics_sample_rate => 1 => 1
datadog.symfony_analytics_sample_rate => 1 => 1
datadog.trace.web_enabled => On => On
datadog.trace.web_analytics_enabled => Off => Off
datadog.web_analytics_enabled => Off => Off
datadog.trace.web_analytics_sample_rate => 1 => 1
datadog.web_analytics_sample_rate => 1 => 1
datadog.trace.wordpress_enabled => On => On
datadog.trace.wordpress_analytics_enabled => Off => Off
datadog.wordpress_analytics_enabled => Off => Off
datadog.trace.wordpress_analytics_sample_rate => 1 => 1
datadog.wordpress_analytics_sample_rate => 1 => 1
datadog.trace.yii_enabled => On => On
datadog.trace.yii_analytics_enabled => Off => Off
datadog.yii_analytics_enabled => Off => Off
datadog.trace.yii_analytics_sample_rate => 1 => 1
datadog.yii_analytics_sample_rate => 1 => 1
datadog.trace.zendframework_enabled => On => On
datadog.trace.zendframework_analytics_enabled => Off => Off
datadog.zendframework_analytics_enabled => Off => Off
datadog.trace.zendframework_analytics_sample_rate => 1 => 1
datadog.zendframework_analytics_sample_rate => 1 => 1

datadog-profiling

Version => 0.96.0
Profiling Enabled => true
Profiling Experimental Features Enabled => false
Experimental CPU Time Profiling Enabled => true
Allocation Profiling Enabled => true
Experimental Timeline Enabled => false
Exception Profiling Enabled => true
Endpoint Collection Enabled => true
Platform's CPU Time API Works => true
Profiling Log Level => off
Profiling Agent Endpoint => http://localhost:8126/
Application's Environment (DD_ENV) =>
Application's Service (DD_SERVICE) => Standard input code
Application's Version (DD_VERSION) =>

Directive => Local Value => Master Value
datadog.profiling.enabled => On => On
datadog.profiling.experimental_features_enabled => Off => Off
datadog.profiling.endpoint_collection_enabled => On => On
datadog.profiling.experimental_cpu_time_enabled => On => On
datadog.profiling.experimental_cpu_enabled => On => On
datadog.profiling.allocation_enabled => On => On
datadog.profiling.experimental_allocation_enabled => On => On
datadog.profiling.experimental_timeline_enabled => Off => Off
datadog.profiling.exception_enabled => On => On
datadog.profiling.experimental_exception_enabled => On => On
datadog.profiling.exception_sampling_distance => 100 => 100
datadog.profiling.experimental_exception_sampling_distance => 100 => 100
datadog.profiling.log_level => off => off
datadog.profiling.output_pprof => no value => no value

Upgrading from

No response

[bwoebi]

Hey, we know about this issue and have a fix for this ready already: #2446.

We'll release it soon, in the meantime, feel free to download and install with this generated installer for the bugfix branch: https://output.circle-artifacts.com/output/job/4429d2ad-e1ab-486b-b7c5-17006d5ed0e2/artifacts/0/datadog-setup.php

EDIT: Read too fast, I saw PHP 8.1.2 and a similar backtrace to that issue, but it's different, sorry. I'm looking at it more closely.

[DuckThom]

Aah yes, I was just checking v0.96.0+6fc83d6357315310881ff7a7fb0067e27620839c and the segfault is indeed still there, no worries 😄

[bwoebi]

I can confirm the issue, it should be broken between 8.1.0 and 8.1.3.

Given that you are using Fibers, I'd like to point out that fibers do have problems with garbage collection in early 8.1 and 8.2 versions, see php/php-src#10496 (< 8.1.17, <8.2.4).

Anyhow, I'll look at how we can fix this.

[DuckThom]

I see, thanks for looking into it. We're unfortunately not able to update to a newer PHP version as this is the one provided by Ubuntu's latest LTS (22.04.3) when installing php8.1.

[bwoebi]

Hey @DuckThom,

please try https://output.circle-artifacts.com/output/job/ae5cabd4-20fc-4602-88b2-d5d9dd2bdfe2/artifacts/0/datadog-setup.php (#2473) - this should actually fix your issue :-)

[DuckThom]

Yes, looks like it's not segfaulting anymore!

root@da900e3e96d7:/# php -v
PHP 8.1.2-1ubuntu2.14 (cli) (built: Aug 18 2023 11:41:11) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.2, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.2-1ubuntu2.14, Copyright (c), by Zend Technologies
    with ddtrace v0.96.0+cc0141a367abcf01b32ed2c50e166edb2255baa8, Copyright Datadog, by Datadog
    with datadog-profiling v0.96.0+cc0141a367abcf01b32ed2c50e166edb2255baa8, Copyright Datadog, by Datadog
    with ddappsec v0.96.0, Copyright Datadog, by Datadog
root@da900e3e96d7:/# php script.php

[DuckThom]

For reference, I've been using this Dockerfile for testing:

FROM ubuntu:jammy

ARG DD_SETUP_URL

ENV DEBIAN_FRONTEND noninteractive

RUN apt-get update -y \
 && apt-get install -y wget curl php8.1 \
 && wget $DD_SETUP_URL \
 && php datadog-setup.php --php-bin all --enable-profiling \
 && echo "<?php \$fiber = new Fiber( function() { \$a = 1; } ); \$return = \$fiber->start();" > script.php

CMD php script.php

Broken setup:

docker build --build-arg DD_SETUP_URL="https://github.com/DataDog/dd-trace-php/releases/download/0.96.0/datadog-setup.php" -t dd-test . && docker run --rm dd-test; echo $?
Segmentation fault
139

Working:

docker build --build-arg DD_SETUP_URL="https://output.circle-artifacts.com/output/job/ae5cabd4-20fc-4602-88b2-d5d9dd2bdfe2/artifacts/0/datadog-setup.php" -t dd-test . && docker run --rm dd-test; echo $?
0