[BUG] Running into segmentation fault but after compiling with --enable-debug dd is not installing.

[christoph-kluge]

Bug description

I'm running into a php segfault by running php artisan. I had to install debug-symbols first so I enabled --enable-debug

PHP version

Forked Dockerfile php:8.1.2-alpine3.15 with --enable-debug.

% php -v

Warning: PHP Startup: Unable to load dynamic library 'ddtrace.so' (tried: /usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so (Error relocating /usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so: _emalloc_2560: symbol not found), /usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so.so (Error loading shared library /usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so.so: No such file or directory)) in Unknown on line 0

PHP 8.1.10 (cli) (built: Sep  8 2022 11:22:30) (NTS DEBUG)
Copyright (c) The PHP Group
Zend Engine v4.1.10, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.10, Copyright (c), by Zend Technologies
    with Xdebug v3.1.5, Copyright (c) 2002-2022, by Derick Rethans

Default Dockerfile php:8.1.2-alpine3.15 without debug symbols.

# php -v

[...missing ddappsec.so error...]

PHP 8.1.10 (cli) (built: Sep  8 2022 14:26:22) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.10, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.10, Copyright (c), by Zend Technologies
    with Xdebug v3.1.5, Copyright (c) 2002-2022, by Derick Rethans
    with ddtrace v0.78.0, Copyright Datadog, by Datadog

Tracer version

0.78.0

Installed extensions

plain

OS info

Running on Docker for Mac with M1 Max

cat /etc/os-release | grep -E "(NAME)|(VERSION)"
NAME="Alpine Linux"
VERSION_ID=3.15.6
PRETTY_NAME="Alpine Linux v3.15"

Diagnostics and configuration

How I'm running the install inside the container

/ # php -v
PHP 8.1.10 (cli) (built: Sep  8 2022 11:22:30) (NTS DEBUG)
Copyright (c) The PHP Group
Zend Engine v4.1.10, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.10, Copyright (c), by Zend Technologies
    with Xdebug v3.1.5, Copyright (c) 2002-2022, by Derick Rethans

/ # curl -LO https://github.com/DataDog/dd-trace-php/releases/latest/download/datadog-setup.php \
>  && php datadog-setup.php --php-bin=all
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100 55072  100 55072    0     0  72799      0 --:--:-- --:--:-- --:--:-- 72799
Searching for available php binaries, this operation might take a while.
Downloading installable archive from https://github.com/DataDog/dd-trace-php/releases/download/0.78.0/dd-library-php-0.78.0-aarch64-linux-musl.tar.gz.
This operation might take a while.
...................
Download completed

Installed required source files to '/opt/datadog/dd-library/0.78.0'
Installing to binary: php (/usr/local/bin/php)

Warning: copy(/tmp/dd-install/dd-library-php/trace/ext/20210902/ddtrace-debug.so): Failed to open stream: No such file or directory in /datadog-setup.php on line 387

Call Stack:
    0.0016     691872   1. {main}() /datadog-setup.php:0
    0.0016     692656   2. main() /datadog-setup.php:1432
    0.0017     693760   3. install($options = ['uninstall' => FALSE, 'php-bin' => [0 => 'all'], 'install-dir' => '/opt/datadog/dd-library', 'enable-appsec' => FALSE, 'enable-profiling' => FALSE]) /datadog-setup.php:34
    4.1338     699736   4. safe_copy_extension($source = '/tmp/dd-install/dd-library-php/trace/ext/20210902/ddtrace-debug.so', $destination = '/usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so') /datadog-setup.php:198
    4.1338     699864   5. copy($from = '/tmp/dd-install/dd-library-php/trace/ext/20210902/ddtrace-debug.so', $to = '/usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so.tmp') /datadog-setup.php:387


Warning: rename(/usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so.tmp,/usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so): No such file or directory in /datadog-setup.php on line 388

Call Stack:
    0.0016     691872   1. {main}() /datadog-setup.php:0
    0.0016     692656   2. main() /datadog-setup.php:1432
    0.0017     693760   3. install($options = ['uninstall' => FALSE, 'php-bin' => [0 => 'all'], 'install-dir' => '/opt/datadog/dd-library', 'enable-appsec' => FALSE, 'enable-profiling' => FALSE]) /datadog-setup.php:34
    4.1338     699736   4. safe_copy_extension($source = '/tmp/dd-install/dd-library-php/trace/ext/20210902/ddtrace-debug.so', $destination = '/usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so') /datadog-setup.php:198
    4.1339     700120   5. rename($from = '/usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so.tmp', $to = '/usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so') /datadog-setup.php:388

Copied '/tmp/dd-install/dd-library-php/trace/ext/20210902/ddtrace-debug.so' to '/usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so'
Created INI file '/usr/local/etc/php/conf.d/98-ddtrace.ini'

Warning: Undefined variable $appSecRulesPath in /datadog-setup.php on line 292

Call Stack:
    0.0016     691872   1. {main}() /datadog-setup.php:0
    0.0016     692656   2. main() /datadog-setup.php:1432
    0.0017     693760   3. install($options = ['uninstall' => FALSE, 'php-bin' => [0 => 'all'], 'install-dir' => '/opt/datadog/dd-library', 'enable-appsec' => FALSE, 'enable-profiling' => FALSE]) /datadog-setup.php:34

Installation to 'php (/usr/local/bin/php)' was successful
--------------------------------------------------
SUCCESS

/ # php -v

Warning: PHP Startup: Unable to load dynamic library 'ddtrace.so' (tried: /usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so (Error loading shared library /usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so: No such file or directory), /usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so.so (Error loading shared library /usr/local/lib/php/extensions/debug-non-zts-20210902/ddtrace.so.so: No such file or directory)) in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library 'ddappsec.so' (tried: /usr/local/lib/php/extensions/debug-non-zts-20210902/ddappsec.so (Error loading shared library /usr/local/lib/php/extensions/debug-non-zts-20210902/ddappsec.so: No such file or directory), /usr/local/lib/php/extensions/debug-non-zts-20210902/ddappsec.so.so (Error loading shared library /usr/local/lib/php/extensions/debug-non-zts-20210902/ddappsec.so.so: No such file or directory)) in Unknown on line 0

PHP 8.1.10 (cli) (built: Sep  8 2022 11:22:30) (NTS DEBUG)
Copyright (c) The PHP Group
Zend Engine v4.1.10, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.10, Copyright (c), by Zend Technologies
    with Xdebug v3.1.5, Copyright (c) 2002-2022, by Derick Rethans

[christoph-kluge]

While looking more carefully on the error-messages of the installer I found out:

When using php with --enable-debug the datadog-setup.php (#L189) uses -debug as suffix for all .so-files.

After Checking the release artifacts for alpine (musl) targets: they are missing -debug nor -zts variants.

• 0.78.0-aarch64-linux-musl.tar.gz
• 0.78.0-x86_64-linux-musl.tar.gz

Any support planned soon?

[christoph-kluge]

Regarding my segmentation fault I only have this info. It seems like something is missing on my end :/

(gdb) run artisan help
Starting program: /usr/local/bin/php artisan help

Program received signal SIGSEGV, Segmentation fault.
0x0000aaaaaaf598fc in zend_observer_fcall_end ()

[christoph-kluge]

Adding last lines from strace -f php /var/www/html/artisan

newfstatat(AT_FDCWD, "/var/www/html/vendor/composer/../laravel/framework/src/Illuminate/Cache/Console/ClearCommand.php", {st_mode=S_IFREG|0755, st_size=3662, ...}, AT_SYMLINK_NOFOLLOW) = 0
newfstatat(AT_FDCWD, "/var/www/html/vendor/composer/../laravel/framework/src/Illuminate/Cache/Console", {st_mode=S_IFDIR|0777, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
openat(AT_FDCWD, "/var/www/html/vendor/laravel/framework/src/Illuminate/Cache/Console/ClearCommand.php", O_RDONLY|O_LARGEFILE) = 5
fstat(5, {st_mode=S_IFREG|0755, st_size=3662, ...}) = 0
read(5, "<?php\n\nnamespace Illuminate\\Cach"..., 3662) = 3662
close(5)                                = 0
newfstatat(AT_FDCWD, "/var/www/html/vendor/composer/../symfony/console/Attribute/AsCommand.php", {st_mode=S_IFREG|0644, st_size=861, ...}, AT_SYMLINK_NOFOLLOW) = 0
newfstatat(AT_FDCWD, "/var/www/html/vendor/composer/../symfony/console/Attribute", {st_mode=S_IFDIR|0777, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
openat(AT_FDCWD, "/var/www/html/vendor/symfony/console/Attribute/AsCommand.php", O_RDONLY|O_LARGEFILE) = 5
fstat(5, {st_mode=S_IFREG|0644, st_size=861, ...}) = 0
read(5, "<?php\n\n/*\n * This file is part o"..., 861) = 861
close(5)                                = 0
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
+++ killed by SIGSEGV +++
Segmentation fault

[christoph-kluge]

Closing this in favor of #1734 and #1735.