7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26
27 #include "jni.h"
28
29 #include "memory/universe.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "prims/whitebox.hpp"
32 #include "runtime/interfaceSupport.hpp"
33 #include "runtime/os.hpp"
34 #include "utilities/debug.hpp"
35
36 #ifndef SERIALGC
37 #include "gc_implementation/g1/concurrentMark.hpp"
38 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
39 #include "gc_implementation/g1/heapRegionRemSet.hpp"
40 #endif // !SERIALGC
41
42 bool WhiteBox::_used = false;
43
44 // Entry macro to transition from JNI to VM state.
45
46 #define WB_ENTRY(result_type, header) JNI_ENTRY(result_type, header)
47 #define WB_END JNI_END
48
49 // Definitions of functions exposed via Whitebox API
50
51 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
52 return (jlong)(void*)JNIHandles::resolve(obj);
53 WB_END
54
55 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
56 return heapOopSize;
57 WB_END
58
59 #ifndef SERIALGC
60 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
61 G1CollectedHeap* g1 = G1CollectedHeap::heap();
62 oop result = JNIHandles::resolve(obj);
63 const HeapRegion* hr = g1->heap_region_containing(result);
64 return hr->isHumongous();
65 WB_END
66
67 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
68 G1CollectedHeap* g1 = G1CollectedHeap::heap();
69 size_t nr = g1->free_regions();
70 return (jlong)nr;
71 WB_END
72
73 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
74 G1CollectedHeap* g1 = G1CollectedHeap::heap();
75 ConcurrentMark* cm = g1->concurrent_mark();
76 return cm->concurrent_marking_in_progress();
77 WB_END
78
79 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
80 return (jint)HeapRegion::GrainBytes;
81 WB_END
82 #endif // !SERIALGC
83
84 #define CC (char*)
85
86 static JNINativeMethod methods[] = {
87 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
88 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
89 #ifndef SERIALGC
90 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
91 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
92 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
93 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
94 #endif // !SERIALGC
95 };
96
97 #undef CC
98
99 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
100 {
101 if (WhiteBoxAPI) {
102 // Make sure that wbclass is loaded by the null classloader
103 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
104 Handle loader(ikh->class_loader());
105 if (loader.is_null()) {
106 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
107 jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0]));
108 if (result == 0) {
|
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26
27 #include "memory/universe.hpp"
28 #include "oops/oop.inline.hpp"
29
30 #include "classfile/symbolTable.hpp"
31
32 #include "prims/whitebox.hpp"
33 #include "prims/wbtestmethods/parserTests.hpp"
34
35 #include "runtime/interfaceSupport.hpp"
36 #include "runtime/os.hpp"
37 #include "utilities/debug.hpp"
38
39 #ifndef SERIALGC
40 #include "gc_implementation/g1/concurrentMark.hpp"
41 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
42 #include "gc_implementation/g1/heapRegionRemSet.hpp"
43 #endif // !SERIALGC
44
45 bool WhiteBox::_used = false;
46
47 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
48 return (jlong)(void*)JNIHandles::resolve(obj);
49 WB_END
50
51 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
52 return heapOopSize;
53 WB_END
54
55 #ifndef SERIALGC
56 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
57 G1CollectedHeap* g1 = G1CollectedHeap::heap();
58 oop result = JNIHandles::resolve(obj);
59 const HeapRegion* hr = g1->heap_region_containing(result);
60 return hr->isHumongous();
61 WB_END
62
63 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
64 G1CollectedHeap* g1 = G1CollectedHeap::heap();
65 size_t nr = g1->free_regions();
66 return (jlong)nr;
67 WB_END
68
69 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
70 G1CollectedHeap* g1 = G1CollectedHeap::heap();
71 ConcurrentMark* cm = g1->concurrent_mark();
72 return cm->concurrent_marking_in_progress();
73 WB_END
74
75 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
76 return (jint)HeapRegion::GrainBytes;
77 WB_END
78 #endif // !SERIALGC
79
80 //Some convenience methods to deal with objects from java
81 int WhiteBox::offset_for_field(const char* field_name, oop object,
82 Symbol* signature_symbol)
83 {
84 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
85 Thread* THREAD = Thread::current();
86
87 //Get the class of our object
88 klassOop arg_klass = object->klass();
89 //Turn it into an instance-klass
90 instanceKlass* ik = instanceKlass::cast(arg_klass);
91
92 //Create symbols to look for in the class
93 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
94 THREAD);
95
96 //To be filled in with an offset of the field we're looking for
97 fieldDescriptor fd;
98
99 klassOop res = ik->find_field(name_symbol, signature_symbol, &fd);
100 if (res == NULL)
101 {
102 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
103 name_symbol->as_C_string());
104 fatal("Invalid layout of preloaded class");
105 }
106
107 //fetch the field at the offset we've found
108 int dest_offset = fd.offset();
109
110 return dest_offset;
111 }
112
113
114 const char* WhiteBox::lookup_jstring(const char* field_name, oop object)
115 {
116 int offset = offset_for_field(field_name, object,
117 vmSymbols::string_signature());
118 oop string = object->obj_field(offset);
119 const char* ret = java_lang_String::as_utf8_string(string);
120 return ret;
121 }
122
123 bool WhiteBox::lookup_bool(const char* field_name, oop object)
124 {
125 int offset =
126 offset_for_field(field_name, object, vmSymbols::bool_signature());
127 bool ret = (object->bool_field(offset) == JNI_TRUE);
128 return ret;
129 }
130
131
132 #define CC (char*)
133
134 static JNINativeMethod methods[] = {
135 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
136 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
137 {CC "parseCommandLine",
138 CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
139 (void*) &WB_ParseCommandLine
140 },
141 #ifndef SERIALGC
142 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
143 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
144 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
145 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
146 #endif // !SERIALGC
147 };
148
149 #undef CC
150
151 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
152 {
153 if (WhiteBoxAPI) {
154 // Make sure that wbclass is loaded by the null classloader
155 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
156 Handle loader(ikh->class_loader());
157 if (loader.is_null()) {
158 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
159 jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0]));
160 if (result == 0) {
|