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comparison src/share/vm/code/dependencies.hpp @ 20316:3c048df3ef8b

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8040920: Uninitialised memory in hotspot/src/share/vm/code/dependencies.cpp Summary: Fixed parfait initialization issue. Reviewed-by: kvn, twisti
author morris
date Thu, 07 Aug 2014 18:09:12 -0700
parents da91efe96a93
children c4f1e23c4139 d5b74c583ec1
comparison
equal deleted inserted replaced
20315:f5b4600d7368 20316:3c048df3ef8b
366 CompileLog* log() { return _log; } 366 CompileLog* log() { return _log; }
367 367
368 void copy_to(nmethod* nm); 368 void copy_to(nmethod* nm);
369 369
370 void log_all_dependencies(); 370 void log_all_dependencies();
371 void log_dependency(DepType dept, int nargs, ciBaseObject* args[]) { 371
372 write_dependency_to(log(), dept, nargs, args); 372 void log_dependency(DepType dept, GrowableArray<ciBaseObject*>* args) {
373 } 373 ResourceMark rm;
374 int argslen = args->length();
375 write_dependency_to(log(), dept, args);
376 guarantee(argslen == args->length(),
377 "args array cannot grow inside nested ResoureMark scope");
378 }
379
374 void log_dependency(DepType dept, 380 void log_dependency(DepType dept,
375 ciBaseObject* x0, 381 ciBaseObject* x0,
376 ciBaseObject* x1 = NULL, 382 ciBaseObject* x1 = NULL,
377 ciBaseObject* x2 = NULL) { 383 ciBaseObject* x2 = NULL) {
378 if (log() == NULL) return; 384 if (log() == NULL) {
379 ciBaseObject* args[max_arg_count]; 385 return;
380 args[0] = x0; 386 }
381 args[1] = x1; 387 ResourceMark rm;
382 args[2] = x2; 388 GrowableArray<ciBaseObject*>* ciargs =
383 assert(2 < max_arg_count, ""); 389 new GrowableArray<ciBaseObject*>(dep_args(dept));
384 log_dependency(dept, dep_args(dept), args); 390 assert (x0 != NULL, "no log x0");
391 ciargs->push(x0);
392
393 if (x1 != NULL) {
394 ciargs->push(x1);
395 }
396 if (x2 != NULL) {
397 ciargs->push(x2);
398 }
399 assert(ciargs->length() == dep_args(dept), "");
400 log_dependency(dept, ciargs);
385 } 401 }
386 402
387 class DepArgument : public ResourceObj { 403 class DepArgument : public ResourceObj {
388 private: 404 private:
389 bool _is_oop; 405 bool _is_oop;
402 418
403 oop oop_value() const { assert(_is_oop && _valid, "must be"); return (oop) _value; } 419 oop oop_value() const { assert(_is_oop && _valid, "must be"); return (oop) _value; }
404 Metadata* metadata_value() const { assert(!_is_oop && _valid, "must be"); return (Metadata*) _value; } 420 Metadata* metadata_value() const { assert(!_is_oop && _valid, "must be"); return (Metadata*) _value; }
405 }; 421 };
406 422
423 static void print_dependency(DepType dept,
424 GrowableArray<DepArgument>* args,
425 Klass* witness = NULL);
426
427 private:
428 // helper for encoding common context types as zero:
429 static ciKlass* ctxk_encoded_as_null(DepType dept, ciBaseObject* x);
430
431 static Klass* ctxk_encoded_as_null(DepType dept, Metadata* x);
432
407 static void write_dependency_to(CompileLog* log, 433 static void write_dependency_to(CompileLog* log,
408 DepType dept, 434 DepType dept,
409 int nargs, ciBaseObject* args[], 435 GrowableArray<ciBaseObject*>* args,
410 Klass* witness = NULL); 436 Klass* witness = NULL);
411 static void write_dependency_to(CompileLog* log, 437 static void write_dependency_to(CompileLog* log,
412 DepType dept, 438 DepType dept,
413 int nargs, DepArgument args[], 439 GrowableArray<DepArgument>* args,
414 Klass* witness = NULL); 440 Klass* witness = NULL);
415 static void write_dependency_to(xmlStream* xtty, 441 static void write_dependency_to(xmlStream* xtty,
416 DepType dept, 442 DepType dept,
417 int nargs, DepArgument args[], 443 GrowableArray<DepArgument>* args,
418 Klass* witness = NULL); 444 Klass* witness = NULL);
419 static void print_dependency(DepType dept,
420 int nargs, DepArgument args[],
421 Klass* witness = NULL);
422
423 private:
424 // helper for encoding common context types as zero:
425 static ciKlass* ctxk_encoded_as_null(DepType dept, ciBaseObject* x);
426
427 static Klass* ctxk_encoded_as_null(DepType dept, Metadata* x);
428
429 public: 445 public:
430 // Use this to iterate over an nmethod's dependency set. 446 // Use this to iterate over an nmethod's dependency set.
431 // Works on new and old dependency sets. 447 // Works on new and old dependency sets.
432 // Usage: 448 // Usage:
433 // 449 //