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 "cds/aotGrowableArray.hpp"
26 #include "cds/aotMetaspace.hpp"
27 #include "cds/archiveBuilder.hpp"
28 #include "cds/archiveUtils.hpp"
29 #include "cds/cdsConfig.hpp"
30 #include "cds/cppVtables.hpp"
31 #include "logging/log.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "oops/instanceClassLoaderKlass.hpp"
34 #include "oops/instanceMirrorKlass.hpp"
35 #include "oops/instanceRefKlass.hpp"
36 #include "oops/instanceStackChunkKlass.hpp"
37 #include "oops/methodCounters.hpp"
38 #include "oops/methodData.hpp"
39 #include "oops/objArrayKlass.hpp"
40 #include "oops/trainingData.hpp"
41 #include "oops/typeArrayKlass.hpp"
42 #include "runtime/arguments.hpp"
43 #include "utilities/globalDefinitions.hpp"
44
45 // Objects of the Metadata types (such as Klass and ConstantPool) have C++ vtables.
46 // (In GCC this is the field <Type>::_vptr, i.e., first word in the object.)
47 //
48 // Addresses of the vtables and the methods may be different across JVM runs,
49 // if libjvm.so is dynamically loaded at a different base address.
50 //
51 // To ensure that the Metadata objects in the CDS archive always have the correct vtable:
52 //
53 // + at dump time: we redirect the _vptr to point to our own vtables inside
54 // the CDS image
55 // + at run time: we clone the actual contents of the vtables from libjvm.so
56 // into our own tables.
57
58
59 #ifndef PRODUCT
60
61 // AOTGrowableArray has a vtable only when in non-product builds (due to
62 // the virtual printing functions in AnyObj).
63
64 using GrowableArray_ModuleEntry_ptr = AOTGrowableArray<ModuleEntry*>;
65
66 #define DEBUG_CPP_VTABLE_TYPES_DO(f) \
67 f(GrowableArray_ModuleEntry_ptr) \
68
69 #endif
70
71 // Currently, the archive contains ONLY the following types of objects that have C++ vtables.
72 #define CPP_VTABLE_TYPES_DO(f) \
73 f(ConstantPool) \
74 f(InstanceKlass) \
75 f(InstanceClassLoaderKlass) \
76 f(InstanceMirrorKlass) \
77 f(InstanceRefKlass) \
78 f(InstanceStackChunkKlass) \
79 f(Method) \
80 f(MethodData) \
81 f(MethodCounters) \
82 f(ObjArrayKlass) \
83 f(TypeArrayKlass) \
84 f(KlassTrainingData) \
85 f(MethodTrainingData) \
86 f(CompileTrainingData) \
87 NOT_PRODUCT(DEBUG_CPP_VTABLE_TYPES_DO(f))
88
89 class CppVtableInfo {
90 intptr_t _vtable_size;
91 intptr_t _cloned_vtable[1]; // Pseudo flexible array member.
92 static size_t cloned_vtable_offset() { return offset_of(CppVtableInfo, _cloned_vtable); }
93 public:
94 int vtable_size() { return int(uintx(_vtable_size)); }
95 void set_vtable_size(int n) { _vtable_size = intptr_t(n); }
96 // Using _cloned_vtable[i] for i > 0 causes undefined behavior. We use address calculation instead.
97 intptr_t* cloned_vtable() { return (intptr_t*)((char*)this + cloned_vtable_offset()); }
98 void zero() { memset(cloned_vtable(), 0, sizeof(intptr_t) * vtable_size()); }
99 // Returns the address of the next CppVtableInfo that can be placed immediately after this CppVtableInfo
100 static size_t byte_size(int vtable_size) {
101 return cloned_vtable_offset() + (sizeof(intptr_t) * vtable_size);
102 }
103 };
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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 "cds/aotGrowableArray.hpp"
26 #include "cds/aotMetaspace.hpp"
27 #include "cds/archiveBuilder.hpp"
28 #include "cds/archiveUtils.hpp"
29 #include "cds/cdsConfig.hpp"
30 #include "cds/cppVtables.hpp"
31 #include "logging/log.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "oops/flatArrayKlass.hpp"
34 #include "oops/inlineKlass.hpp"
35 #include "oops/instanceClassLoaderKlass.hpp"
36 #include "oops/instanceKlass.inline.hpp"
37 #include "oops/instanceMirrorKlass.hpp"
38 #include "oops/instanceRefKlass.hpp"
39 #include "oops/instanceStackChunkKlass.hpp"
40 #include "oops/methodCounters.hpp"
41 #include "oops/methodData.hpp"
42 #include "oops/objArrayKlass.hpp"
43 #include "oops/refArrayKlass.hpp"
44 #include "oops/trainingData.hpp"
45 #include "oops/typeArrayKlass.hpp"
46 #include "runtime/arguments.hpp"
47 #include "utilities/globalDefinitions.hpp"
48
49 // Objects of the Metadata types (such as Klass and ConstantPool) have C++ vtables.
50 // (In GCC this is the field <Type>::_vptr, i.e., first word in the object.)
51 //
52 // Addresses of the vtables and the methods may be different across JVM runs,
53 // if libjvm.so is dynamically loaded at a different base address.
54 //
55 // To ensure that the Metadata objects in the CDS archive always have the correct vtable:
56 //
57 // + at dump time: we redirect the _vptr to point to our own vtables inside
58 // the CDS image
59 // + at run time: we clone the actual contents of the vtables from libjvm.so
60 // into our own tables.
61
62
63 #ifndef PRODUCT
64
65 // AOTGrowableArray has a vtable only when in non-product builds (due to
66 // the virtual printing functions in AnyObj).
67
68 using GrowableArray_ModuleEntry_ptr = AOTGrowableArray<ModuleEntry*>;
69
70 #define DEBUG_CPP_VTABLE_TYPES_DO(f) \
71 f(GrowableArray_ModuleEntry_ptr) \
72
73 #endif
74
75 // Currently, the archive contains ONLY the following types of objects that have C++ vtables.
76 // NOTE: this table must be in-sync with sun.jvm.hotspot.memory.FileMapInfo::populateMetadataTypeArray().
77 #define CPP_VTABLE_TYPES_DO(f) \
78 f(ConstantPool) \
79 f(InstanceKlass) \
80 f(InstanceClassLoaderKlass) \
81 f(InstanceMirrorKlass) \
82 f(InstanceRefKlass) \
83 f(InstanceStackChunkKlass) \
84 f(Method) \
85 f(MethodData) \
86 f(MethodCounters) \
87 f(TypeArrayKlass) \
88 f(ObjArrayKlass) \
89 f(RefArrayKlass) \
90 f(FlatArrayKlass) \
91 f(InlineKlass) \
92 f(KlassTrainingData) \
93 f(MethodTrainingData) \
94 f(CompileTrainingData) \
95 NOT_PRODUCT(DEBUG_CPP_VTABLE_TYPES_DO(f))
96
97 class CppVtableInfo {
98 intptr_t _vtable_size;
99 intptr_t _cloned_vtable[1]; // Pseudo flexible array member.
100 static size_t cloned_vtable_offset() { return offset_of(CppVtableInfo, _cloned_vtable); }
101 public:
102 int vtable_size() { return int(uintx(_vtable_size)); }
103 void set_vtable_size(int n) { _vtable_size = intptr_t(n); }
104 // Using _cloned_vtable[i] for i > 0 causes undefined behavior. We use address calculation instead.
105 intptr_t* cloned_vtable() { return (intptr_t*)((char*)this + cloned_vtable_offset()); }
106 void zero() { memset(cloned_vtable(), 0, sizeof(intptr_t) * vtable_size()); }
107 // Returns the address of the next CppVtableInfo that can be placed immediately after this CppVtableInfo
108 static size_t byte_size(int vtable_size) {
109 return cloned_vtable_offset() + (sizeof(intptr_t) * vtable_size);
110 }
111 };
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