Draft: XDebug support via dlopen

.libs/xdebug.la

@@ -0,0 +1,35 @@
+# xdebug.la - a libtool library file
+# Generated by ltmain.sh - GNU libtool 1.5.26 (1.1220.2.492 2008/01/30 06:40:56)
+#
+# Please DO NOT delete this file!
+# It is necessary for linking the library.
+
+# The name that we can dlopen(3).
+dlname='xdebug.so'
+
+# Names of this library.
+library_names='xdebug.so xdebug.so xdebug.so'
+
+# The name of the static archive.
+old_library=''
+
+# Libraries that this one depends upon.
+dependency_libs=' -lm'
+
+# Version information for xdebug.
+current=0
+age=0
+revision=0
+
+# Is this an already installed library?
+installed=no
+
+# Should we warn about portability when linking against -modules?
+shouldnotlink=yes
+
+# Files to dlopen/dlpreopen
+dlopen=''
+dlpreopen=''
+
+# Directory that this library needs to be installed in:
+libdir='/Users/cloudnik/www/Automattic/core/xdebug/modules'

.libs/xdebug.lai

@@ -0,0 +1,35 @@
+# xdebug.la - a libtool library file
+# Generated by ltmain.sh - GNU libtool 1.5.26 (1.1220.2.492 2008/01/30 06:40:56)
+#
+# Please DO NOT delete this file!
+# It is necessary for linking the library.
+
+# The name that we can dlopen(3).
+dlname='xdebug.so'
+
+# Names of this library.
+library_names='xdebug.so xdebug.so xdebug.so'
+
+# The name of the static archive.
+old_library=''
+
+# Libraries that this one depends upon.
+dependency_libs=' -lm'
+
+# Version information for xdebug.
+current=0
+age=0
+revision=0
+
+# Is this an already installed library?
+installed=yes
+
+# Should we warn about portability when linking against -modules?
+shouldnotlink=yes
+
+# Files to dlopen/dlpreopen
+dlopen=''
+dlpreopen=''
+
+# Directory that this library needs to be installed in:
+libdir='/Users/cloudnik/www/Automattic/core/xdebug/modules'

packages/php-wasm/cli/src/main.ts

@@ -27,7 +27,7 @@
 
 async function run() {
 	// @ts-ignore
 	const defaultPhpIniPath = await import('./php.ini');
 	const phpVersion = (process.env['PHP'] ||
 		LatestSupportedPHPVersion) as SupportedPHPVersion;
 	if (!SupportedPHPVersionsList.includes(phpVersion)) {
@@ -75,7 +75,7 @@
 
 	const hasMinusCOption = args.some((arg) => arg.startsWith('-c'));
 	if (!hasMinusCOption) {
-		args.unshift('-c', defaultPhpIniPath);
+		// args.unshift('-c', defaultPhpIniPath);
 	}
 
 	await php

packages/php-wasm/compile/build.js

@@ -51,6 +51,11 @@ const argParser = yargs(process.argv.slice(2))
 			choices: ['yes', 'no'],
 			description: 'Build with mbregex support',
 		},
+		WITH_READLINE: {
+			type: 'string',
+			choices: ['yes', 'no'],
+			description: 'Build with Readline support',
+		},
 		WITH_CLI_SAPI: {
 			type: 'string',
 			choices: ['yes', 'no'],
@@ -126,16 +131,15 @@ const platformDefaults = {
 		WITH_OPENSSL: 'yes',
 	},
 	node: {
-		WITH_ICONV: 'yes',
-		WITH_LIBXML: 'yes',
-		WITH_LIBPNG: 'yes',
-		WITH_ICONV: 'yes',
-		WITH_MBSTRING: 'yes',
-		WITH_MBREGEX: 'yes',
+		// WITH_ICONV: 'yes',
+		// WITH_LIBXML: 'yes',
+		// WITH_LIBPNG: 'yes',
+		// WITH_MBSTRING: 'yes',
+		// WITH_MBREGEX: 'yes',
 		WITH_CLI_SAPI: 'yes',
-		WITH_OPENSSL: 'yes',
+		// WITH_OPENSSL: 'yes',
 		WITH_NODEFS: 'yes',
-		WITH_MYSQL: 'yes',
+		// WITH_MYSQL: 'yes',
 		WITH_WS_NETWORKING_PROXY: 'yes',
 	},
 };
@@ -195,6 +199,8 @@ await asyncSpawn(
 		'--build-arg',
 		getArg('WITH_CLI_SAPI'),
 		'--build-arg',
+		getArg('WITH_READLINE'),
+		'--build-arg',
 		getArg('WITH_OPENSSL'),
 		'--build-arg',
 		getArg('WITH_NODEFS'),

packages/php-wasm/compile/php/Dockerfile

@@ -45,6 +45,7 @@ ARG WITH_SQLITE
 ARG WITH_MYSQL
 ARG WITH_OPENSSL
 ARG WITH_ICONV
+ARG WITH_READLINE
 ARG WITH_SOURCEMAPS
 ARG WITH_WS_NETWORKING_PROXY
 
@@ -93,22 +94,28 @@ RUN if [ "$WITH_LIBZIP" = "yes" ]; then \
 	fi;
 
 
-# Add ncurses if needed and libedit if needed
 RUN if [ "$WITH_CLI_SAPI" = "yes" ]; \
 	then \
 		# Configure build flags
-		echo -n ' --enable-phar --enable-cli=static --enable-readline --with-libedit=/root/lib ' >> /root/.php-configure-flags && \
+		echo -n ' --enable-phar --enable-cli=static ' >> /root/.php-configure-flags && \
 		echo -n ' sapi/cli/php_cli_process_title.c sapi/cli/ps_title.c sapi/cli/php_http_parser.c sapi/cli/php_cli_server.c sapi/cli/php_cli.c ' \
 			>> /root/.emcc-php-wasm-sources && \
 		echo -n ', "_run_cli", "_wasm_add_cli_arg"' >> /root/.EXPORTED_FUNCTIONS && \
-		echo -n ' -DWITH_CLI_SAPI=1 -lncurses -ledit ' >> /root/.emcc-php-wasm-flags && \
-		# Disable dlopen() in the readline PHP extension
-		echo '#undef COMPILE_DL_READLINE' >> /root/php-src/main/php_config.h && \
-		/root/replace.sh 's/GET_SHELL_CB\(cb\);/(cb) = php_cli_get_shell_callbacks();/g' /root/php-src/ext/readline/readline_cli.c; \
+		echo -n ' -DWITH_CLI_SAPI=1 ' >> /root/.emcc-php-wasm-flags; \
 	else \
 		echo -n ' --disable-cli ' >> /root/.php-configure-flags; \
 	fi;
 
+# Add ncurses if needed and libedit if needed
+RUN if [ "$WITH_READLINE" = "yes" ]; \
+	then \
+		echo -n ' --enable-readline --with-libedit=/root/lib ' >> /root/.php-configure-flags && \
+		echo -n ' -lncurses -ledit ' >> /root/.emcc-php-wasm-flags && \
+		# Disable dlopen() in the readline PHP extension
+		/root/replace.sh 's/GET_SHELL_CB\(cb\);/(cb) = php_cli_get_shell_callbacks();/g' /root/php-src/ext/readline/readline_cli.c; \
+		echo '#undef COMPILE_DL_READLINE' >> /root/php-src/main/php_config.h; \
+	fi;
+
 # Add Libxml2 if needed
 RUN if [ "$WITH_LIBXML" = "yes" ]; \
 	then \
@@ -202,6 +209,9 @@ RUN if [ "$WITH_MYSQL" = "yes" ]; then \
 		echo -n ' --enable-mysql --enable-pdo --with-mysql=mysqlnd --with-mysqli=mysqlnd --with-pdo-mysql=mysqlnd ' >> /root/.php-configure-flags; \
 	fi
 
+# @TODO: Figure out why this is needed:
+RUN sed -i 's/HARDCODED_INI/HARDCODED_INI2/g' /root/php-src/sapi/cli/php_cli.c
+
 # Build the patched PHP
 WORKDIR /root/php-src
 RUN source /root/emsdk/emsdk_env.sh && \
@@ -225,7 +235,7 @@ RUN source /root/emsdk/emsdk_env.sh && \
 	--disable-all      \
 	--enable-hash      \
 	--enable-static=yes \
-	--enable-shared=no \
+	--enable-shared=yes \
 	--enable-session   \
 	--enable-filter    \
 	--enable-calendar  \
@@ -434,6 +444,11 @@ RUN echo -n ' -s ASYNCIFY=1 -s ASYNCIFY_IGNORE_INDIRECT=1 ' >> /root/.emcc-php-w
 "zif_fwrite",\
 "php_stdiop_write",\
 "zif_array_filter",\
+"dlopen",\
+"zend_load_extension",\
+"zend_llist_apply",\
+"php_ini_register_extensions",\
+"php_load_zend_extension_cb",\
 "zend_call_known_instance_method_with_2_params",\
 "zend_fetch_dimension_address_read_R",\
 "_zval_dtor_func_for_ptr",\
@@ -739,6 +754,7 @@ RUN set -euxo pipefail; \
 	mkdir -p /build/output; \
 	source /root/emsdk/emsdk_env.sh; \
 	export EXPORTED_FUNCTIONS=$'["_exit", \n\
+"_compiler_globals", \n\
 "_php_wasm_init", \n\
 "_phpwasm_destroy_uploaded_files_hash", \n\
 "_phpwasm_init_uploaded_files_hash", \n\
@@ -783,6 +799,7 @@ RUN set -euxo pipefail; \
 	-s INITIAL_MEMORY=1024MB \
 	-s ALLOW_MEMORY_GROWTH=1         \
 	-s ASSERTIONS=0                  \
+    -s MAIN_MODULE                   \
 	-s ERROR_ON_UNDEFINED_SYMBOLS=0  \
 	-s NODEJS_CATCH_EXIT=0           \
 	-s NODEJS_CATCH_REJECTION=0      \
@@ -876,6 +893,8 @@ RUN set -euxo pipefail; \
 		# wrapper function.
 		/root/replace.sh $'s/ENVIRONMENT_IS_([A-Z]+)\s*=\s*(true|false)/ENVIRONMENT_IS_$1=RuntimeName==="$1"/g' /root/output/php.js; \
 		/root/replace.sh 's/var ENV\s*=\s*\{/var ENV = PHPLoader.ENV || {/g' /root/output/php.js; \
+		/root/replace.sh 's/__dlopen_js\./__dlopen_js_unused./g' /root/output/php.js; \
+		/root/replace.sh 's/__dlopen_js\s*=/__dlopen_js_unused =/g' /root/output/php.js; \
 	# Turn the php.js file into an ES module
 		# Manually turn the output into a esm module instead of relying on -s MODULARIZE=1.
 		# which pollutes the global namespace and does not play well with import() mechanics.

packages/php-wasm/compile/php/esm-prefix.js

@@ -34,4 +34,10 @@ export function init(RuntimeName, PHPLoader) {
         }
     }
 
+    const __dlopen_js = function (handle) {
+        var jsflags = { loadAsync: false }
+        return dlopenInternal(handle, jsflags);
+    };
+    __dlopen_js.isAsync = false;
+
     // The rest of the code comes from the built php.js file and esm-suffix.js

packages/php-wasm/compile/php/php_wasm.c

@@ -1581,3 +1581,9 @@ int EMSCRIPTEN_KEEPALIVE del_callback(zend_function *fptr)
 }
 #endif
 
+EMSCRIPTEN_KEEPALIVE void emscripten_console_log(char *a){}
+EMSCRIPTEN_KEEPALIVE void emscripten_console_warn(char *a){}
+EMSCRIPTEN_KEEPALIVE void emscripten_console_error(char *a){}
+EMSCRIPTEN_KEEPALIVE void emscripten_out(char *a){}
+EMSCRIPTEN_KEEPALIVE void emscripten_err(char *a){}
+EMSCRIPTEN_KEEPALIVE void emscripten_dbg(char *a){}