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Placing class and method name directly into AST insted of using magic constants (#1106) #1108

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Placing class and method name directly into AST insted of using magic constants (#1106) #1108

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413a0d2
Placing class and method name directly into AST insted of using magic…
intuibase Dec 7, 2023
baf04c4
reverted commented out code
intuibase Dec 7, 2023
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12 changes: 7 additions & 5 deletions agent/native/ext/AST_instrumentation.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -507,7 +507,7 @@ zend_ast* createAstStandaloneNotFqFunctionCall( StringView funcName, zend_ast* a
return createAstStandaloneFunctionCall( funcName, /* isFullyQualified */ false, astArgList );
}

ResultCode createPreHookAstArgListByCaptureSpec( zend_ast_decl* astDecl, ArgCaptureSpecArrayView argCaptureSpecs, /* out */ zend_ast** pResult )
ResultCode createPreHookAstArgListByCaptureSpec( zend_ast_decl *parentClass, zend_ast_decl* astDecl, ArgCaptureSpecArrayView argCaptureSpecs, /* out */ zend_ast** pResult )
{
// AST for PHP code:
//
Expand All @@ -526,12 +526,14 @@ ResultCode createPreHookAstArgListByCaptureSpec( zend_ast_decl* astDecl, ArgCapt
uint32_t lineNumber = astDecl->start_lineno;
zend_ast* capturedArgsAstArray = NULL;



ELASTIC_APM_CALL_IF_FAILED_GOTO( createCapturedArgsAstArray( astDecl, argCaptureSpecs, lineNumber, /* out */ &capturedArgsAstArray ) );

*pResult = createAstListWithThreeChildren(
ZEND_AST_ARG_LIST
, astDecl->kind == ZEND_AST_METHOD ? createAstMagicConst__CLASS__( lineNumber ) : createAstConstNull( lineNumber )
, createAstMagicConst__FUNCTION__( lineNumber )
, astDecl->kind == ZEND_AST_METHOD ? createAstZValString(makeStringView(ZSTR_VAL(((zend_ast_decl *)parentClass)->name), ZSTR_LEN(((zend_ast_decl *)parentClass)->name)), lineNumber) : createAstConstNull( lineNumber )
, createAstZValString(makeStringView(ZSTR_VAL(astDecl->name), ZSTR_LEN(astDecl->name)), lineNumber)
, capturedArgsAstArray
);
resultCode = resultSuccess;
Expand All @@ -552,7 +554,7 @@ static StringView g_elastic_apm_ast_instrumentation_pre_hook_funcName = ELASTIC_
*/
static const size_t g_funcDeclBodyChildIndex = 2;

ResultCode insertAstForFunctionPreHook( zend_ast_decl* funcAstDecl, ArgCaptureSpecArrayView argCaptureSpecs )
ResultCode insertAstForFunctionPreHook( zend_ast_decl *parentClass, zend_ast_decl* funcAstDecl, ArgCaptureSpecArrayView argCaptureSpecs )
{
// Before:
//
Expand Down Expand Up @@ -623,7 +625,7 @@ ResultCode insertAstForFunctionPreHook( zend_ast_decl* funcAstDecl, ArgCaptureSp
ELASTIC_APM_SET_RESULT_CODE_AND_GOTO_FAILURE();
}

ELASTIC_APM_CALL_IF_FAILED_GOTO( createPreHookAstArgListByCaptureSpec( funcAstDecl, argCaptureSpecs, /* out */ &preHookCallAstArgList ) );
ELASTIC_APM_CALL_IF_FAILED_GOTO( createPreHookAstArgListByCaptureSpec( parentClass, funcAstDecl, argCaptureSpecs, /* out */ &preHookCallAstArgList ) );

funcAstDecl->child[ g_funcDeclBodyChildIndex ] = createAstListWithTwoChildren(
ZEND_AST_STMT_LIST
Expand Down
2 changes: 1 addition & 1 deletion agent/native/ext/AST_instrumentation.h
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Expand Up @@ -45,7 +45,7 @@ zend_ast_decl** findChildSlotForStandaloneFunctionAst( zend_ast* rootAst, String
zend_ast_decl* findClassAst( zend_ast* rootAst, StringView nameSpace, StringView className );
zend_ast_decl** findChildSlotForMethodAst( zend_ast_decl* astClass, StringView methodName, size_t minParamsCount );

ResultCode insertAstForFunctionPreHook( zend_ast_decl* funcAstDecl, ArgCaptureSpecArrayView argCaptureSpecs );
ResultCode insertAstForFunctionPreHook( zend_ast_decl *parentClass, zend_ast_decl* funcAstDecl, ArgCaptureSpecArrayView argCaptureSpecs );
ResultCode appendDirectCallToInstrumentation( zend_ast_decl** pAstChildSlot, StringView constNameForMethodName );
ResultCode wrapStandaloneFunctionAstWithPrePostHooks( zend_ast_decl** pAstChildSlot );

Expand Down
8 changes: 4 additions & 4 deletions agent/native/ext/WordPress_instrumentation.cpp
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Expand Up @@ -87,14 +87,14 @@ void wordPressInstrumentationOnRequestShutdown()
}

static
ResultCode insertPreHookForFunctionWithHookNameCallbackParams( zend_ast_decl* astDecl )
ResultCode insertPreHookForFunctionWithHookNameCallbackParams( zend_ast_decl *parentClass, zend_ast_decl* astDecl )
{
// standalone function:
// function _wp_filter_build_unique_id( $hook_name, $callback, $priority )
// class WP_Hook method
// public function add_filter( $hook_name, $callback, $priority, $accepted_args )
ArgCaptureSpec argCaptureSpecArr[] = { /* capture $hook_name by value */ captureArgByValue, /* capture $callback by reference */ captureArgByRef };
return insertAstForFunctionPreHook( astDecl, ELASTIC_APM_MAKE_ARRAY_VIEW_FROM_STATIC( ArgCaptureSpecArrayView, argCaptureSpecArr ) );
return insertAstForFunctionPreHook(parentClass, astDecl, ELASTIC_APM_MAKE_ARRAY_VIEW_FROM_STATIC( ArgCaptureSpecArrayView, argCaptureSpecArr ) );
}

static StringView g_globalNamespace = ELASTIC_APM_STRING_LITERAL_TO_VIEW( "" );
Expand All @@ -116,7 +116,7 @@ ResultCode wordPressInstrumentationTransformFile_plugin_php( zend_ast* ast )
ELASTIC_APM_SET_RESULT_CODE_AND_GOTO_FAILURE();
}

ELASTIC_APM_CALL_IF_FAILED_GOTO( insertPreHookForFunctionWithHookNameCallbackParams( *p_wp_filter_build_unique_id_astFuncDecl ) );
ELASTIC_APM_CALL_IF_FAILED_GOTO( insertPreHookForFunctionWithHookNameCallbackParams( nullptr, *p_wp_filter_build_unique_id_astFuncDecl ) );
// It's important to record if we instrumented _wp_filter_build_unique_id successfully.
// _wp_filter_build_unique_id instrumentation alone cannot make application work incorrectly
// because it checks if $callback is an instance our WordPressFilterCallbackWrapper class before unwrapping it.
Expand Down Expand Up @@ -159,7 +159,7 @@ ResultCode wordPressInstrumentationTransformFile_class_wp_hook_php( zend_ast* as
ELASTIC_APM_SET_RESULT_CODE_AND_GOTO_FAILURE();
}

ELASTIC_APM_CALL_IF_FAILED_GOTO( insertPreHookForFunctionWithHookNameCallbackParams( *p_add_filter_astMethod ) );
ELASTIC_APM_CALL_IF_FAILED_GOTO( insertPreHookForFunctionWithHookNameCallbackParams(WP_Hook_astClassDecl, *p_add_filter_astMethod ) );

resultCode = resultSuccess;
finally:
Expand Down
1 change: 0 additions & 1 deletion agent/native/ext/tracer_PHP_part.cpp
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Expand Up @@ -370,7 +370,6 @@ void tracerPhpPartForwardCall( StringView phpFuncName, zend_execute_data* execut
}
}


getArgsFromZendExecuteData( execute_data, g_maxInterceptedCallArgsCount, &( callArgs[ 0 ] ), &callArgsCount );
tracerPhpPartLogArguments( logLevel_trace, callArgsCount, callArgs );

Expand Down
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