34 * method handle implementation.
35 * Usage: {@code import static java.lang.invoke.MethodHandleStatics.*}
36 * @author John Rose, JSR 292 EG
37 */
38 /*non-public*/ class MethodHandleStatics {
39
40 private MethodHandleStatics() { } // do not instantiate
41
42 static final Unsafe UNSAFE = Unsafe.getUnsafe();
43
44 static final boolean DEBUG_METHOD_HANDLE_NAMES;
45 static final boolean DUMP_CLASS_FILES;
46 static final boolean TRACE_INTERPRETER;
47 static final boolean TRACE_METHOD_LINKAGE;
48 static final int COMPILE_THRESHOLD;
49 static final int DONT_INLINE_THRESHOLD;
50 static final int PROFILE_LEVEL;
51 static final boolean PROFILE_GWT;
52 static final int CUSTOMIZE_THRESHOLD;
53
54 // This is a temporary property added for improved error reporting; it will
55 // be removed once it has served its purpose.
56 static final boolean OBSERVE_BMH_SPECIES_CREATION;
57
58 static {
59 final Object[] values = new Object[10];
60 AccessController.doPrivileged(new PrivilegedAction<>() {
61 public Void run() {
62 values[0] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DEBUG_NAMES");
63 values[1] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DUMP_CLASS_FILES");
64 values[2] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_INTERPRETER");
65 values[3] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_METHOD_LINKAGE");
66 values[4] = Integer.getInteger("java.lang.invoke.MethodHandle.COMPILE_THRESHOLD", 0);
67 values[5] = Integer.getInteger("java.lang.invoke.MethodHandle.DONT_INLINE_THRESHOLD", 30);
68 values[6] = Integer.getInteger("java.lang.invoke.MethodHandle.PROFILE_LEVEL", 0);
69 values[7] = Boolean.parseBoolean(System.getProperty("java.lang.invoke.MethodHandle.PROFILE_GWT", "true"));
70 values[8] = Integer.getInteger("java.lang.invoke.MethodHandle.CUSTOMIZE_THRESHOLD", 127);
71 values[9] = Boolean.getBoolean("java.lang.invoke.MethodHandle.OBSERVE_BMH_SPECIES_CREATION");
72 return null;
73 }
74 });
75 DEBUG_METHOD_HANDLE_NAMES = (Boolean) values[0];
76 DUMP_CLASS_FILES = (Boolean) values[1];
77 TRACE_INTERPRETER = (Boolean) values[2];
78 TRACE_METHOD_LINKAGE = (Boolean) values[3];
79 COMPILE_THRESHOLD = (Integer) values[4];
80 DONT_INLINE_THRESHOLD = (Integer) values[5];
81 PROFILE_LEVEL = (Integer) values[6];
82 PROFILE_GWT = (Boolean) values[7];
83 CUSTOMIZE_THRESHOLD = (Integer) values[8];
84
85 OBSERVE_BMH_SPECIES_CREATION = (Boolean) values[9];
86
87 if (CUSTOMIZE_THRESHOLD < -1 || CUSTOMIZE_THRESHOLD > 127) {
88 throw newInternalError("CUSTOMIZE_THRESHOLD should be in [-1...127] range");
89 }
90 }
91
92 /** Tell if any of the debugging switches are turned on.
93 * If this is the case, it is reasonable to perform extra checks or save extra information.
94 */
95 /*non-public*/ static boolean debugEnabled() {
96 return (DEBUG_METHOD_HANDLE_NAMES |
97 DUMP_CLASS_FILES |
98 TRACE_INTERPRETER |
99 TRACE_METHOD_LINKAGE);
100 }
101
102 /*non-public*/ static String getNameString(MethodHandle target, MethodType type) {
103 if (type == null)
104 type = target.type();
105 MemberName name = null;
106 if (target != null)
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34 * method handle implementation.
35 * Usage: {@code import static java.lang.invoke.MethodHandleStatics.*}
36 * @author John Rose, JSR 292 EG
37 */
38 /*non-public*/ class MethodHandleStatics {
39
40 private MethodHandleStatics() { } // do not instantiate
41
42 static final Unsafe UNSAFE = Unsafe.getUnsafe();
43
44 static final boolean DEBUG_METHOD_HANDLE_NAMES;
45 static final boolean DUMP_CLASS_FILES;
46 static final boolean TRACE_INTERPRETER;
47 static final boolean TRACE_METHOD_LINKAGE;
48 static final int COMPILE_THRESHOLD;
49 static final int DONT_INLINE_THRESHOLD;
50 static final int PROFILE_LEVEL;
51 static final boolean PROFILE_GWT;
52 static final int CUSTOMIZE_THRESHOLD;
53
54 static {
55 final Object[] values = new Object[9];
56 AccessController.doPrivileged(new PrivilegedAction<>() {
57 public Void run() {
58 values[0] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DEBUG_NAMES");
59 values[1] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DUMP_CLASS_FILES");
60 values[2] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_INTERPRETER");
61 values[3] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_METHOD_LINKAGE");
62 values[4] = Integer.getInteger("java.lang.invoke.MethodHandle.COMPILE_THRESHOLD", 0);
63 values[5] = Integer.getInteger("java.lang.invoke.MethodHandle.DONT_INLINE_THRESHOLD", 30);
64 values[6] = Integer.getInteger("java.lang.invoke.MethodHandle.PROFILE_LEVEL", 0);
65 values[7] = Boolean.parseBoolean(System.getProperty("java.lang.invoke.MethodHandle.PROFILE_GWT", "true"));
66 values[8] = Integer.getInteger("java.lang.invoke.MethodHandle.CUSTOMIZE_THRESHOLD", 127);
67 return null;
68 }
69 });
70 DEBUG_METHOD_HANDLE_NAMES = (Boolean) values[0];
71 DUMP_CLASS_FILES = (Boolean) values[1];
72 TRACE_INTERPRETER = (Boolean) values[2];
73 TRACE_METHOD_LINKAGE = (Boolean) values[3];
74 COMPILE_THRESHOLD = (Integer) values[4];
75 DONT_INLINE_THRESHOLD = (Integer) values[5];
76 PROFILE_LEVEL = (Integer) values[6];
77 PROFILE_GWT = (Boolean) values[7];
78 CUSTOMIZE_THRESHOLD = (Integer) values[8];
79
80 if (CUSTOMIZE_THRESHOLD < -1 || CUSTOMIZE_THRESHOLD > 127) {
81 throw newInternalError("CUSTOMIZE_THRESHOLD should be in [-1...127] range");
82 }
83 }
84
85 /** Tell if any of the debugging switches are turned on.
86 * If this is the case, it is reasonable to perform extra checks or save extra information.
87 */
88 /*non-public*/ static boolean debugEnabled() {
89 return (DEBUG_METHOD_HANDLE_NAMES |
90 DUMP_CLASS_FILES |
91 TRACE_INTERPRETER |
92 TRACE_METHOD_LINKAGE);
93 }
94
95 /*non-public*/ static String getNameString(MethodHandle target, MethodType type) {
96 if (type == null)
97 type = target.type();
98 MemberName name = null;
99 if (target != null)
|