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20 changes: 20 additions & 0 deletions
20
agent/native/building/cmake/elastic_conan_debugsymbols.cmake
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,20 @@ | ||
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| function(copy_debug_symbols target) | ||
| block(SCOPE_FOR VARIABLES) | ||
| get_target_property(_TargetType ${target} TYPE) | ||
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| add_custom_command(TARGET ${target} | ||
| POST_BUILD | ||
| COMMAND | ||
| ${CMAKE_OBJCOPY} "--only-keep-debug" "$<TARGET_FILE:${target}>" "$<TARGET_FILE_DIR:${target}>/$<TARGET_PROPERTY:${target},DEBUG_SYMBOL_FILE>" | ||
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| COMMAND | ||
| ${CMAKE_OBJCOPY} | ||
| "--add-gnu-debuglink=$<TARGET_FILE_DIR:${target}>/$<TARGET_PROPERTY:${target},DEBUG_SYMBOL_FILE>" | ||
| "--strip-debug" "--strip-unneeded" | ||
| "$<TARGET_FILE:${target}>" | ||
| COMMENT "Striped debug symbols from ${target}" | ||
| ) | ||
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| endblock() | ||
| endfunction() |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,2 @@ | ||
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| add_subdirectory(code) |
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| #scan for source files | ||
| AUX_SOURCE_DIRECTORY(. SrcFiles) | ||
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| set (_Target elasticapm_loader) | ||
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| add_library (${_Target} SHARED ${SrcFiles}) | ||
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| target_link_libraries(${_Target} | ||
| PRIVATE libcommon | ||
| ) | ||
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| set_target_properties(${_Target} | ||
| PROPERTIES OUTPUT_NAME elastic_apm_loader | ||
| PREFIX "" | ||
| DEBUG_SYMBOL_FILE "elastic_apm_loader.debug" | ||
| ) | ||
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| if (RELEASE_BUILD) | ||
| copy_debug_symbols(${_Target}) | ||
| endif() | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,171 @@ | ||
| #include "phpdetection.h" | ||
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| #include <dlfcn.h> | ||
| #include <stddef.h> | ||
| #include <stdio.h> | ||
| #include <syslog.h> | ||
| #include <unistd.h> | ||
| #include <sys/syscall.h> | ||
| #include <filesystem> | ||
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| #include "elastic_apm_version.h" | ||
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| #define LOG_TO_SYSLOG_AND_STDERR(fmt, ... ) \ | ||
| do { \ | ||
| fprintf(stderr, \ | ||
| "[elastic_apm_loader][PID: %d]" \ | ||
| "[TID: %d] " \ | ||
| fmt \ | ||
| ,(int)getpid() \ | ||
| ,(int)syscall( SYS_gettid ) \ | ||
| , ##__VA_ARGS__ ); \ | ||
| syslog( \ | ||
| LOG_WARNING, \ | ||
| "[elastic_apm_loader][PID: %d]" \ | ||
| "[TID: %d] " \ | ||
| fmt \ | ||
| , (int)(getpid()) \ | ||
| , (int)(syscall( SYS_gettid )) \ | ||
| , ##__VA_ARGS__ ); \ | ||
| } \ | ||
| while(0); | ||
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| namespace elasticapm::loader { | ||
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| namespace phpdata { | ||
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| #define INIT_FUNC_ARGS int type, int module_number | ||
| #define INIT_FUNC_ARGS_PASSTHRU type, module_number | ||
| #define SHUTDOWN_FUNC_ARGS int type, int module_number | ||
| #define SHUTDOWN_FUNC_ARGS_PASSTHRU type, module_number | ||
| #define ZEND_MODULE_INFO_FUNC_ARGS zend_module_entry *zend_module | ||
| #define ZEND_MODULE_INFO_FUNC_ARGS_PASSTHRU zend_module | ||
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| struct zend_module_entry { | ||
| unsigned short size; | ||
| unsigned int zend_api; | ||
| unsigned char zend_debug; | ||
| unsigned char zts; | ||
| const void *ini_entry; | ||
| const void *deps; | ||
| const char *name; | ||
| const void *functions; | ||
| int (*module_startup_func)(INIT_FUNC_ARGS); | ||
| int (*module_shutdown_func)(SHUTDOWN_FUNC_ARGS); | ||
| int (*request_startup_func)(INIT_FUNC_ARGS); | ||
| int (*request_shutdown_func)(SHUTDOWN_FUNC_ARGS); | ||
| void (*info_func)(ZEND_MODULE_INFO_FUNC_ARGS); | ||
| const char *version; | ||
| size_t globals_size; | ||
| #ifdef ZTS | ||
| ts_rsrc_id* globals_id_ptr; | ||
| #else | ||
| void* globals_ptr; | ||
| #endif | ||
| void (*globals_ctor)(void *global); | ||
| void (*globals_dtor)(void *global); | ||
| int (*post_deactivate_func)(void); | ||
| int module_started; | ||
| unsigned char type; | ||
| void *handle; | ||
| int module_number; | ||
| const char *build_id; | ||
| }; | ||
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| } | ||
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| } | ||
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| elasticapm::loader::phpdata::zend_module_entry elastic_apm_loader_module_entry = { | ||
| sizeof(elasticapm::loader::phpdata::zend_module_entry), | ||
| 0, // API, f.ex.20220829 | ||
| 0, // DEBUG | ||
| 0, // USING_ZTS | ||
| nullptr, | ||
| nullptr, | ||
| "elastic_apm_loader", /* Extension name */ | ||
| nullptr, /* zend_function_entry */ | ||
| nullptr, /* PHP_MINIT - Module initialization */ | ||
| nullptr, /* PHP_MSHUTDOWN - Module shutdown */ | ||
| nullptr, /* PHP_RINIT - Request initialization */ | ||
| nullptr, /* PHP_RSHUTDOWN - Request shutdown */ | ||
| nullptr, /* PHP_MINFO - Module info */ | ||
| PHP_ELASTIC_APM_VERSION, /* Version */ | ||
| 0, /* globals_size */ | ||
| nullptr, /* globals ptr */ | ||
| nullptr, /* PHP_GINIT */ | ||
| nullptr, /* PHP_GSHUTDOWN */ | ||
| nullptr, /* post deactivate */ | ||
| 0, | ||
| 0, | ||
| nullptr, | ||
| 0, | ||
| "" // API20220829,NTS .. | ||
| }; | ||
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| extern "C" { | ||
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| __attribute__ ((visibility("default"))) elasticapm::loader::phpdata::zend_module_entry *get_module(void) { | ||
| using namespace std::string_view_literals; | ||
| using namespace std::string_literals; | ||
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| auto zendVersion = elasticapm::loader::getMajorMinorZendVersion(); | ||
| if (zendVersion.empty()) { | ||
| LOG_TO_SYSLOG_AND_STDERR( "Can't find Zend/PHP Engine version\n"); | ||
| return &elastic_apm_loader_module_entry; | ||
| } | ||
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| auto [zendEngineVersion, zendModuleApiVersion, isVersionSupported] = elasticapm::loader::getZendModuleApiVersion(zendVersion); | ||
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| bool isThreadSafe = elasticapm::loader::isThreadSafe(); | ||
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| static std::string zendBuildId{"API"s}; | ||
| zendBuildId.append(std::to_string(zendModuleApiVersion)); | ||
| zendBuildId.append(isThreadSafe ? ",TS"sv : ",NTS"sv); | ||
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| elastic_apm_loader_module_entry.zend_api = zendModuleApiVersion; | ||
| elastic_apm_loader_module_entry.build_id = zendBuildId.c_str(); | ||
| elastic_apm_loader_module_entry.zts = isThreadSafe; | ||
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| if (!isVersionSupported) { | ||
| LOG_TO_SYSLOG_AND_STDERR( "Zend Engine version %s is not supported by Elastic APM Agent\n", std::string(zendVersion).c_str()); | ||
| return &elastic_apm_loader_module_entry; | ||
| } | ||
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| if (isThreadSafe) { | ||
| LOG_TO_SYSLOG_AND_STDERR( "Thread Safe mode (ZTS) is not supported by Elastic APM Agent\n"); | ||
| return &elastic_apm_loader_module_entry; // unsupported thread safe mode | ||
| } | ||
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| // get path to libraries | ||
| Dl_info dl_info; | ||
| dladdr((void *)get_module, &dl_info); | ||
| if (!dl_info.dli_fname) { | ||
| LOG_TO_SYSLOG_AND_STDERR( "Unable to resolve path to Elastic PHP Agent libraries\n"); | ||
| return &elastic_apm_loader_module_entry; | ||
| } | ||
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| auto elasticAgentPath = std::filesystem::path(dl_info.dli_fname).parent_path(); | ||
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| auto agentLibrary = (elasticAgentPath/"elastic_apm-"sv); | ||
| agentLibrary += std::to_string(zendModuleApiVersion); | ||
| agentLibrary += ".so"sv; | ||
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| void *agentHandle = dlopen(agentLibrary.c_str(), RTLD_LAZY | RTLD_GLOBAL); | ||
| if (!agentHandle) { | ||
| LOG_TO_SYSLOG_AND_STDERR( "Unable to load agent library from path: %s\n", agentLibrary.c_str()); | ||
| return &elastic_apm_loader_module_entry; | ||
| } | ||
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| auto agentGetModule = reinterpret_cast<elasticapm::loader::phpdata::zend_module_entry *(*)(void)>(dlsym(agentHandle, "get_module")); | ||
| if (!agentGetModule) { | ||
| LOG_TO_SYSLOG_AND_STDERR( "Unable to resolve agent entry point from library: %s\n", agentLibrary.c_str()); | ||
| return &elastic_apm_loader_module_entry; | ||
| } | ||
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| return agentGetModule(); // or we can call zend_register_module_ex(agentGetModule())) and have both fully loaded | ||
| } | ||
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| } |
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