Print actual string arguments with -Xtrace (part 2)

The changes reflect the feature request #16416.

Adding cmdline option to specify string argument length.
-Xtrace:methodstrarglen=[1-128]
methodStrArgLen takes an unsigned integer value from 1 to 128
If methodStrArgLen = 0 or unspecified, default to 32.
Other invalid inputs result in the input error.

There will be subsequent PR for tests (part 3).

Signed-off-by: Nick Kamal <[email protected]>

runtime/rastrace/method_trace.c

@@ -487,8 +487,8 @@ traceMethodArgObject(J9VMThread *thr, UDATA* arg0EA, char* cursor, UDATA length)
 #define DEFAULT_STRING_LENGTH 32
 			char utf8Buffer[128];
 			UDATA utf8Length = 0;
-            const unsigned int methodStrArgLength = ((RasGlobalStorage *)thr->javaVM->j9rasGlobalStorage)->methodStrArgLength;
-            unsigned int strArgLength = methodStrArgLength == 0 ? DEFAULT_STRING_LENGTH : methodStrArgLength;
+			const unsigned int methodStrArgLength = ((RasGlobalStorage *)thr->javaVM->j9rasGlobalStorage)->methodStrArgLength;
+			unsigned int strArgLength = methodStrArgLength == 0 ? DEFAULT_STRING_LENGTH : methodStrArgLength;
 
 			char *utf8String = vm->internalVMFunctions->copyStringToUTF8WithMemAlloc(
 					thr,