--- a/src/hotspot/share/interpreter/interpreterRuntime.cpp Wed Mar 21 17:09:34 2018 -0400
+++ b/src/hotspot/share/interpreter/interpreterRuntime.cpp Wed Mar 21 19:45:24 2018 -0400
@@ -53,6 +53,7 @@
#include "runtime/compilationPolicy.hpp"
#include "runtime/deoptimization.hpp"
#include "runtime/fieldDescriptor.hpp"
+#include "runtime/frame.inline.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/icache.hpp"
#include "runtime/interfaceSupport.inline.hpp"
@@ -84,6 +85,58 @@
}
};
+// Helper class to access current interpreter state
+class LastFrameAccessor : public StackObj {
+ frame _last_frame;
+public:
+ LastFrameAccessor(JavaThread* thread) {
+ assert(thread == Thread::current(), "sanity");
+ _last_frame = thread->last_frame();
+ }
+ bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
+ Method* method() const { return _last_frame.interpreter_frame_method(); }
+ address bcp() const { return _last_frame.interpreter_frame_bcp(); }
+ int bci() const { return _last_frame.interpreter_frame_bci(); }
+ address mdp() const { return _last_frame.interpreter_frame_mdp(); }
+
+ void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
+ void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
+
+ // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
+ Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
+
+ Bytecode bytecode() const { return Bytecode(method(), bcp()); }
+ int get_index_u1(Bytecodes::Code bc) const { return bytecode().get_index_u1(bc); }
+ int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
+ int get_index_u2_cpcache(Bytecodes::Code bc) const
+ { return bytecode().get_index_u2_cpcache(bc); }
+ int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
+ int number_of_dimensions() const { return bcp()[3]; }
+ ConstantPoolCacheEntry* cache_entry_at(int i) const
+ { return method()->constants()->cache()->entry_at(i); }
+ ConstantPoolCacheEntry* cache_entry() const { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); }
+
+ oop callee_receiver(Symbol* signature) {
+ return _last_frame.interpreter_callee_receiver(signature);
+ }
+ BasicObjectLock* monitor_begin() const {
+ return _last_frame.interpreter_frame_monitor_begin();
+ }
+ BasicObjectLock* monitor_end() const {
+ return _last_frame.interpreter_frame_monitor_end();
+ }
+ BasicObjectLock* next_monitor(BasicObjectLock* current) const {
+ return _last_frame.next_monitor_in_interpreter_frame(current);
+ }
+
+ frame& get_frame() { return _last_frame; }
+};
+
+
+bool InterpreterRuntime::is_breakpoint(JavaThread *thread) {
+ return Bytecodes::code_or_bp_at(LastFrameAccessor(thread).bcp()) == Bytecodes::_breakpoint;
+}
+
//------------------------------------------------------------------------------------------------------------------------
// State accessors