Mercurial > hg > graal-jvmci-8
comparison src/share/vm/ci/ciInstanceKlass.cpp @ 1138:dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
Summary: C2 needs some additional optimizations to be able to handle MethodHandle invokes and invokedynamic instructions at the best performance.
Reviewed-by: kvn, never
| author | twisti |
|---|---|
| date | Tue, 05 Jan 2010 15:21:25 +0100 |
| parents | 7c57aead6d3e |
| children | 4ce7240d622c |
comparison
equal
deleted
inserted
replaced
| 1137:97125851f396 | 1138:dd57230ba8fe |
|---|---|
| 230 } | 230 } |
| 231 | 231 |
| 232 // ------------------------------------------------------------------ | 232 // ------------------------------------------------------------------ |
| 233 // ciInstanceKlass::uses_default_loader | 233 // ciInstanceKlass::uses_default_loader |
| 234 bool ciInstanceKlass::uses_default_loader() { | 234 bool ciInstanceKlass::uses_default_loader() { |
| 235 VM_ENTRY_MARK; | 235 // Note: We do not need to resolve the handle or enter the VM |
| 236 return loader() == NULL; | 236 // in order to test null-ness. |
| 237 return _loader == NULL; | |
| 238 } | |
| 239 | |
| 240 // ------------------------------------------------------------------ | |
| 241 // ciInstanceKlass::is_in_package | |
| 242 // | |
| 243 // Is this klass in the given package? | |
| 244 bool ciInstanceKlass::is_in_package(const char* packagename, int len) { | |
| 245 // To avoid class loader mischief, this test always rejects application classes. | |
| 246 if (!uses_default_loader()) | |
| 247 return false; | |
| 248 GUARDED_VM_ENTRY( | |
| 249 return is_in_package_impl(packagename, len); | |
| 250 ) | |
| 251 } | |
| 252 | |
| 253 bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) { | |
| 254 ASSERT_IN_VM; | |
| 255 | |
| 256 // If packagename contains trailing '/' exclude it from the | |
| 257 // prefix-test since we test for it explicitly. | |
| 258 if (packagename[len - 1] == '/') | |
| 259 len--; | |
| 260 | |
| 261 if (!name()->starts_with(packagename, len)) | |
| 262 return false; | |
| 263 | |
| 264 // Test if the class name is something like "java/lang". | |
| 265 if ((len + 1) > name()->utf8_length()) | |
| 266 return false; | |
| 267 | |
| 268 // Test for trailing '/' | |
| 269 if ((char) name()->byte_at(len) != '/') | |
| 270 return false; | |
| 271 | |
| 272 // Make sure it's not actually in a subpackage: | |
| 273 if (name()->index_of_at(len+1, "/", 1) >= 0) | |
| 274 return false; | |
| 275 | |
| 276 return true; | |
| 237 } | 277 } |
| 238 | 278 |
| 239 // ------------------------------------------------------------------ | 279 // ------------------------------------------------------------------ |
| 240 // ciInstanceKlass::print_impl | 280 // ciInstanceKlass::print_impl |
| 241 // | 281 // |