Fix "storing the address of local variable" in trcmain.c

This commit stops storing the address of a local variable, to fix a
build error with runtime/rastrace/trcmain.c.

Fixes: eclipse-openj9#20171

Signed-off-by: KONNO Kazuhiro <konno@jp.ibm.com>

runtime/rastrace/trcengine.c

@@ -243,6 +243,7 @@ J9VMDllMain(J9JavaVM *vm, IDATA stage, void *reserved)
 	char *opts[UT_MAX_OPTS] = {0};
 	int i = 0;
 	UtThreadData **tempThr = NULL;
+	UtThreadData thrData;
 	J9VMThread *thr = NULL;
 	RasGlobalStorage *tempRasGbl = (RasGlobalStorage *)vm->j9rasGlobalStorage;
 	void **tempGbl = NULL;
@@ -333,6 +334,7 @@ J9VMDllMain(J9JavaVM *vm, IDATA stage, void *reserved)
 		 * Find UTE thread slot inside VM thread structure
 		 */
 		tempThr = UT_THREAD_FROM_VM_THREAD(vm->mainThread);
+		*tempThr = &thrData;
 		tempGbl = &tempRasGbl->utGlobalData;
 
 		/* Add Java trace trigger types to the default OMR set */
@@ -463,7 +465,6 @@ J9VMDllMain(J9JavaVM *vm, IDATA stage, void *reserved)
 		break;
 
 	case VM_INITIALIZATION_COMPLETE:
-		tempThr = UT_THREAD_FROM_VM_THREAD(vm->mainThread);
 		{
 			/* Force loading of the Trace class. See defect 162723, this is required because of some nuance
 			 * in the early initialization of DB/2 (which uses the Trace class).

runtime/rastrace/trcmain.c

@@ -1026,11 +1026,10 @@ omr_error_t
 initializeTrace(UtThreadData **thr, void **gbl,
 				 const char **opts, const OMR_VM *vm,
 				 const char ** ignore, const OMRTraceLanguageInterface *languageIntf)
-
 {
 	omr_error_t   rc = OMR_ERROR_NONE;
 	int           i;
-	UtThreadData  tempThr;
+	UtThreadData *tempThr = *thr;
 	UtGlobalData  tempGbl;
 	UtGlobalData *newGbl;
 	qQueue       *outputQueue = NULL;
@@ -1039,10 +1038,8 @@ initializeTrace(UtThreadData **thr, void **gbl,
 	/*
 	 *  Bootstrap UtThreadData first using stack variable (in case we call utcFprintf below)
 	 */
-	memset(&tempThr, 0, sizeof(UtThreadData));
-	initHeader(&tempThr.header, UT_THREAD_DATA_NAME, sizeof(UtThreadData));
-
-	*thr = &tempThr;
+	memset(tempThr, 0, sizeof(UtThreadData));
+	initHeader(&(tempThr->header), UT_THREAD_DATA_NAME, sizeof(UtThreadData));
 
 	if (utGlobal != NULL){
 		if (UT_GLOBAL(traceEnabled) == TRUE){