2159 return NULL; |
2159 return NULL; |
2160 } |
2160 } |
2161 } |
2161 } |
2162 |
2162 |
2163 |
2163 |
2164 bool nmethod::check_all_dependencies() { |
2164 void nmethod::check_all_dependencies(DepChange& changes) { |
2165 bool found_check = false; |
2165 // Checked dependencies are allocated into this ResourceMark |
2166 // wholesale check of all dependencies |
2166 ResourceMark rm; |
2167 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2167 |
2168 if (deps.check_dependency() != NULL) { |
2168 // Turn off dependency tracing while actually testing dependencies. |
2169 found_check = true; |
2169 NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) ); |
2170 NOT_DEBUG(break); |
2170 |
2171 } |
2171 // 'dep_signature_buffers' caches already checked dependencies. |
2172 } |
2172 DependencySignatureBuffer dep_signature_buffers; |
2173 return found_check; // tell caller if we found anything |
2173 |
|
2174 // Iterate over live nmethods and check dependencies of all nmethods that are not |
|
2175 // marked for deoptimization. A particular dependency is only checked once. |
|
2176 for(nmethod* nm = CodeCache::alive_nmethod(CodeCache::first()); nm != NULL; nm = CodeCache::alive_nmethod(CodeCache::next(nm))) { |
|
2177 if (!nm->is_marked_for_deoptimization()) { |
|
2178 for (Dependencies::DepStream deps(nm); deps.next(); ) { |
|
2179 // Construct abstraction of a dependency. |
|
2180 const DependencySignature* current_sig = new DependencySignature(deps); |
|
2181 // Determine if 'deps' is already checked. If it is not checked, |
|
2182 // 'add_if_missing()' adds the dependency signature and returns |
|
2183 // false. |
|
2184 if (!dep_signature_buffers.add_if_missing(*current_sig)) { |
|
2185 if (deps.check_dependency() != NULL) { |
|
2186 // Dependency checking failed. Print out information about the failed |
|
2187 // dependency and finally fail with an assert. We can fail here, since |
|
2188 // dependency checking is never done in a product build. |
|
2189 ResourceMark rm; |
|
2190 changes.print(); |
|
2191 nm->print(); |
|
2192 nm->print_dependencies(); |
|
2193 assert(false, "Should have been marked for deoptimization"); |
|
2194 } |
|
2195 } |
|
2196 } |
|
2197 } |
|
2198 } |
2174 } |
2199 } |
2175 |
2200 |
2176 bool nmethod::check_dependency_on(DepChange& changes) { |
2201 bool nmethod::check_dependency_on(DepChange& changes) { |
2177 // What has happened: |
2202 // What has happened: |
2178 // 1) a new class dependee has been added |
2203 // 1) a new class dependee has been added |