Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/runtime/jniHandles.cpp
src/share/vm/runtime/jniHandles.cpp
- changeset 9669
- 32bc598624bd
- parent 9665
- a8441ccaff15
- child 9703
- 2fdf635bcf28
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| 9668:acb9351e3a29 | 9669:32bc598624bd |
|---|---|
| 28 #include "oops/oop.inline.hpp" | 28 #include "oops/oop.inline.hpp" |
| 29 #include "prims/jvmtiExport.hpp" | 29 #include "prims/jvmtiExport.hpp" |
| 30 #include "runtime/jniHandles.hpp" | 30 #include "runtime/jniHandles.hpp" |
| 31 #include "runtime/mutexLocker.hpp" | 31 #include "runtime/mutexLocker.hpp" |
| 32 #include "runtime/thread.inline.hpp" | 32 #include "runtime/thread.inline.hpp" |
| 33 #if INCLUDE_ALL_GCS | |
| 34 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" | |
| 35 #endif | |
| 33 | 36 |
| 34 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC | 37 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
| 35 | 38 |
| 36 JNIHandleBlock* JNIHandles::_global_handles = NULL; | 39 JNIHandleBlock* JNIHandles::_global_handles = NULL; |
| 37 JNIHandleBlock* JNIHandles::_weak_global_handles = NULL; | 40 JNIHandleBlock* JNIHandles::_weak_global_handles = NULL; |
| 85 } | 88 } |
| 86 | 89 |
| 87 return res; | 90 return res; |
| 88 } | 91 } |
| 89 | 92 |
| 90 | |
| 91 jobject JNIHandles::make_weak_global(Handle obj) { | 93 jobject JNIHandles::make_weak_global(Handle obj) { |
| 92 assert(!Universe::heap()->is_gc_active(), "can't extend the root set during GC"); | 94 assert(!Universe::heap()->is_gc_active(), "can't extend the root set during GC"); |
| 93 jobject res = NULL; | 95 jobject res = NULL; |
| 94 if (!obj.is_null()) { | 96 if (!obj.is_null()) { |
| 95 // ignore null handles | 97 // ignore null handles |
| 96 MutexLocker ml(JNIGlobalHandle_lock); | 98 { |
| 97 assert(Universe::heap()->is_in_reserved(obj()), "sanity check"); | 99 MutexLocker ml(JNIGlobalHandle_lock); |
| 98 res = _weak_global_handles->allocate_handle(obj()); | 100 assert(Universe::heap()->is_in_reserved(obj()), "sanity check"); |
| 101 res = _weak_global_handles->allocate_handle(obj()); | |
| 102 } | |
| 103 // Add weak tag. | |
| 104 assert(is_ptr_aligned(res, weak_tag_alignment), "invariant"); | |
| 105 char* tptr = reinterpret_cast<char*>(res) + weak_tag_value; | |
| 106 res = reinterpret_cast<jobject>(tptr); | |
| 99 } else { | 107 } else { |
| 100 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | 108 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
| 101 } | 109 } |
| 102 return res; | 110 return res; |
| 103 } | 111 } |
| 104 | 112 |
| 113 template<bool external_guard> | |
| 114 oop JNIHandles::resolve_jweak(jweak handle) { | |
| 115 assert(is_jweak(handle), "precondition"); | |
| 116 oop result = jweak_ref(handle); | |
| 117 result = guard_value<external_guard>(result); | |
| 118 #if INCLUDE_ALL_GCS | |
| 119 if (result != NULL && UseG1GC) { | |
| 120 G1SATBCardTableModRefBS::enqueue(result); | |
| 121 } | |
| 122 #endif // INCLUDE_ALL_GCS | |
| 123 return result; | |
| 124 } | |
| 125 | |
| 126 template oop JNIHandles::resolve_jweak<true>(jweak); | |
| 127 template oop JNIHandles::resolve_jweak<false>(jweak); | |
| 105 | 128 |
| 106 void JNIHandles::destroy_global(jobject handle) { | 129 void JNIHandles::destroy_global(jobject handle) { |
| 107 if (handle != NULL) { | 130 if (handle != NULL) { |
| 108 assert(is_global_handle(handle), "Invalid delete of global JNI handle"); | 131 assert(is_global_handle(handle), "Invalid delete of global JNI handle"); |
| 109 *((oop*)handle) = deleted_handle(); // Mark the handle as deleted, allocate will reuse it | 132 jobject_ref(handle) = deleted_handle(); |
| 110 } | 133 } |
| 111 } | 134 } |
| 112 | |
| 113 | 135 |
| 114 void JNIHandles::destroy_weak_global(jobject handle) { | 136 void JNIHandles::destroy_weak_global(jobject handle) { |
| 115 if (handle != NULL) { | 137 if (handle != NULL) { |
| 116 assert(!CheckJNICalls || is_weak_global_handle(handle), "Invalid delete of weak global JNI handle"); | 138 jweak_ref(handle) = deleted_handle(); |
| 117 *((oop*)handle) = deleted_handle(); // Mark the handle as deleted, allocate will reuse it | |
| 118 } | 139 } |
| 119 } | 140 } |
| 120 | 141 |
| 121 | 142 |
| 122 void JNIHandles::oops_do(OopClosure* f) { | 143 void JNIHandles::oops_do(OopClosure* f) { |
