8241909: Remove useless code cache lookup in frame::patch_pc

Removed useless code cache lookup.

Reviewed-by: kvn, dlong

src/hotspot/cpu/aarch64/frame_aarch64.cpp

@@ -264,6 +264,7 @@ bool frame::safe_for_sender(JavaThread *thread) {
 }
 
 void frame::patch_pc(Thread* thread, address pc) {
+  assert(_cb == CodeCache::find_blob(pc), "unexpected pc");
   address* pc_addr = &(((address*) sp())[-1]);
   if (TracePcPatching) {
     tty->print_cr("patch_pc at address " INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "]",
@@ -273,7 +274,6 @@ void frame::patch_pc(Thread* thread, address pc) {
   // patch in the same address that's already there.
   assert(_pc == *pc_addr || pc == *pc_addr, "must be");
   *pc_addr = pc;
-  _cb = CodeCache::find_blob(pc);
   address original_pc = CompiledMethod::get_deopt_original_pc(this);
   if (original_pc != NULL) {
     assert(original_pc == _pc, "expected original PC to be stored before patching");

src/hotspot/cpu/arm/frame_arm.cpp

@@ -223,13 +223,13 @@ bool frame::safe_for_sender(JavaThread *thread) {
 
 
 void frame::patch_pc(Thread* thread, address pc) {
+  assert(_cb == CodeCache::find_blob(pc), "unexpected pc");
   address* pc_addr = &((address *)sp())[-sender_sp_offset+return_addr_offset];
   if (TracePcPatching) {
     tty->print_cr("patch_pc at address" INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "] ",
                   p2i(pc_addr), p2i(*pc_addr), p2i(pc));
   }
   *pc_addr = pc;
-  _cb = CodeCache::find_blob(pc);
   address original_pc = CompiledMethod::get_deopt_original_pc(this);
   if (original_pc != NULL) {
     assert(original_pc == _pc, "expected original PC to be stored before patching");

src/hotspot/cpu/ppc/frame_ppc.cpp

@@ -247,12 +247,12 @@ frame frame::sender(RegisterMap* map) const {
 }
 
 void frame::patch_pc(Thread* thread, address pc) {
+  assert(_cb == CodeCache::find_blob(pc), "unexpected pc");
   if (TracePcPatching) {
     tty->print_cr("patch_pc at address " PTR_FORMAT " [" PTR_FORMAT " -> " PTR_FORMAT "]",
                   p2i(&((address*) _sp)[-1]), p2i(((address*) _sp)[-1]), p2i(pc));
   }
   own_abi()->lr = (uint64_t)pc;
-  _cb = CodeCache::find_blob(pc);
   if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) {
     address orig = (((nmethod*)_cb)->get_original_pc(this));
     assert(orig == _pc, "expected original to be stored before patching");

src/hotspot/cpu/s390/frame_s390.cpp

@@ -262,12 +262,12 @@ frame frame::sender(RegisterMap* map) const {
 }
 
 void frame::patch_pc(Thread* thread, address pc) {
+  assert(_cb == CodeCache::find_blob(pc), "unexpected pc");
   if (TracePcPatching) {
     tty->print_cr("patch_pc at address  " PTR_FORMAT " [" PTR_FORMAT " -> " PTR_FORMAT "] ",
                   p2i(&((address*) _sp)[-1]), p2i(((address*) _sp)[-1]), p2i(pc));
   }
   own_abi()->return_pc = (uint64_t)pc;
-  _cb = CodeCache::find_blob(pc);
   address original_pc = CompiledMethod::get_deopt_original_pc(this);
   if (original_pc != NULL) {
     assert(original_pc == _pc, "expected original to be stored before patching");

src/hotspot/cpu/sparc/frame_sparc.cpp

@@ -550,9 +550,10 @@ frame frame::sender(RegisterMap* map) const {
 
 
 void frame::patch_pc(Thread* thread, address pc) {
+  assert(_cb == CodeCache::find_blob(pc), "unexpected pc");
   vmassert(_deopt_state != unknown, "frame is unpatchable");
-  if(thread == Thread::current()) {
-   StubRoutines::Sparc::flush_callers_register_windows_func()();
+  if (thread == Thread::current()) {
+    StubRoutines::Sparc::flush_callers_register_windows_func()();
   }
   if (TracePcPatching) {
     // QQQ this assert is invalid (or too strong anyway) sice _pc could
@@ -561,9 +562,7 @@ void frame::patch_pc(Thread* thread, address pc) {
     tty->print_cr("patch_pc at address " INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "]",
                   p2i(O7_addr()), p2i(_pc), p2i(pc));
   }
-  _cb = CodeCache::find_blob(pc);
   *O7_addr() = pc - pc_return_offset;
-  _cb = CodeCache::find_blob(_pc);
   address original_pc = CompiledMethod::get_deopt_original_pc(this);
   if (original_pc != NULL) {
     assert(original_pc == _pc, "expected original to be stored before patching");

src/hotspot/cpu/x86/frame_x86.cpp

@@ -253,6 +253,7 @@ bool frame::safe_for_sender(JavaThread *thread) {
 
 
 void frame::patch_pc(Thread* thread, address pc) {
+  assert(_cb == CodeCache::find_blob(pc), "unexpected pc");
   address* pc_addr = &(((address*) sp())[-1]);
   if (TracePcPatching) {
     tty->print_cr("patch_pc at address " INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "]",
@@ -262,7 +263,6 @@ void frame::patch_pc(Thread* thread, address pc) {
   // patch in the same address that's already there.
   assert(_pc == *pc_addr || pc == *pc_addr, "must be");
   *pc_addr = pc;
-  _cb = CodeCache::find_blob(pc);
   address original_pc = CompiledMethod::get_deopt_original_pc(this);
   if (original_pc != NULL) {
     assert(original_pc == _pc, "expected original PC to be stored before patching");

src/hotspot/cpu/zero/frame_zero.cpp

@@ -98,12 +98,10 @@ BasicObjectLock* frame::interpreter_frame_monitor_end() const {
 #endif // CC_INTERP
 
 void frame::patch_pc(Thread* thread, address pc) {
-
   if (pc != NULL) {
-    _cb = CodeCache::find_blob(pc);
+    assert(_cb == CodeCache::find_blob(pc), "unexpected pc");
     _pc = pc;
     _deopt_state = is_deoptimized;
-
   } else {
     // We borrow this call to set the thread pointer in the interpreter
     // state; the hook to set up deoptimized frames isn't supplied it.