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comparison src/share/vm/oops/method.hpp @ 14521:29ccc4cbabca

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Merge
author Gilles Duboscq <duboscq@ssw.jku.at>
date Wed, 12 Mar 2014 13:30:08 +0100
parents d8041d695d19
children b51e29501f30
comparison
equal deleted inserted replaced
14520:f84115370178 14521:29ccc4cbabca
36 #include "oops/oop.hpp" 36 #include "oops/oop.hpp"
37 #include "oops/typeArrayOop.hpp" 37 #include "oops/typeArrayOop.hpp"
38 #include "utilities/accessFlags.hpp" 38 #include "utilities/accessFlags.hpp"
39 #include "utilities/growableArray.hpp" 39 #include "utilities/growableArray.hpp"
40 40
41 // A Method* represents a Java method. 41 // A Method represents a Java method.
42 // 42 //
43 // Memory layout (each line represents a word). Note that most applications load thousands of methods, 43 // Memory layout (each line represents a word). Note that most applications load thousands of methods,
44 // so keeping the size of this structure small has a big impact on footprint. 44 // so keeping the size of this structure small has a big impact on footprint.
45 //
46 // We put all oops and method_size first for better gc cache locality.
47 // 45 //
48 // The actual bytecodes are inlined after the end of the Method struct. 46 // The actual bytecodes are inlined after the end of the Method struct.
49 // 47 //
50 // There are bits in the access_flags telling whether inlined tables are present. 48 // There are bits in the access_flags telling whether inlined tables are present.
51 // Note that accessing the line number and local variable tables is not performance critical at all. 49 // Note that accessing the line number and local variable tables is not performance critical at all.
62 // 60 //
63 // |------------------------------------------------------| 61 // |------------------------------------------------------|
64 // | header | 62 // | header |
65 // | klass | 63 // | klass |
66 // |------------------------------------------------------| 64 // |------------------------------------------------------|
67 // | ConstMethod* (oop) | 65 // | ConstMethod* (metadata) |
68 // |------------------------------------------------------| 66 // |------------------------------------------------------|
69 // | methodData (oop) | 67 // | MethodData* (metadata) |
70 // | methodCounters | 68 // | MethodCounters |
71 // |------------------------------------------------------| 69 // |------------------------------------------------------|
72 // | access_flags | 70 // | access_flags |
73 // | vtable_index | 71 // | vtable_index |
74 // |------------------------------------------------------| 72 // |------------------------------------------------------|
75 // | result_index (C++ interpreter only) | 73 // | result_index (C++ interpreter only) |
76 // |------------------------------------------------------| 74 // |------------------------------------------------------|
77 // | method_size | intrinsic_id| flags | 75 // | method_size | intrinsic_id | flags |
78 // |------------------------------------------------------| 76 // |------------------------------------------------------|
79 // | code (pointer) | 77 // | code (pointer) |
80 // | i2i (pointer) | 78 // | i2i (pointer) |
81 // | adapter (pointer) | 79 // | adapter (pointer) |
82 // | from_compiled_entry (pointer) | 80 // | from_compiled_entry (pointer) |
348 MethodData* method_data() const { 346 MethodData* method_data() const {
349 return _method_data; 347 return _method_data;
350 } 348 }
351 349
352 void set_method_data(MethodData* data) { 350 void set_method_data(MethodData* data) {
353 _method_data = data; 351 // The store into method must be released. On platforms without
352 // total store order (TSO) the reference may become visible before
353 // the initialization of data otherwise.
354 OrderAccess::release_store_ptr((volatile void *)&_method_data, data);
354 } 355 }
355 356
356 MethodCounters* method_counters() const { 357 MethodCounters* method_counters() const {
357 return _method_counters; 358 return _method_counters;
358 } 359 }
359 360
360
361 void set_method_counters(MethodCounters* counters) { 361 void set_method_counters(MethodCounters* counters) {
362 _method_counters = counters; 362 // The store into method must be released. On platforms without
363 // total store order (TSO) the reference may become visible before
364 // the initialization of data otherwise.
365 OrderAccess::release_store_ptr((volatile void *)&_method_counters, counters);
363 } 366 }
364 367
365 #ifdef TIERED 368 #ifdef TIERED
366 // We are reusing interpreter_invocation_count as a holder for the previous event count! 369 // We are reusing interpreter_invocation_count as a holder for the previous event count!
367 // We can do that since interpreter_invocation_count is not used in tiered. 370 // We can do that since interpreter_invocation_count is not used in tiered.