frame_sparc.cpp revision 2578
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
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95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson// Unified register numbering scheme: each 32-bits counts as a register
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson// number, so all the V9 registers take 2 slots.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonconst static int R_L_nums[] = {0+040,2+040,4+040,6+040,8+040,10+040,12+040,14+040};
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonconst static int R_I_nums[] = {0+060,2+060,4+060,6+060,8+060,10+060,12+060,14+060};
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonconst static int R_O_nums[] = {0+020,2+020,4+020,6+020,8+020,10+020,12+020,14+020};
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonconst static int R_G_nums[] = {0+000,2+000,4+000,6+000,8+000,10+000,12+000,14+000};
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonstatic RegisterMap::LocationValidType bad_mask = 0;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonstatic RegisterMap::LocationValidType R_LIO_mask = 0;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonstatic bool register_map_inited = false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson for (i = 0; i < 8; i++) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(R_L_nums[i] < RegisterMap::location_valid_type_size, "in first chunk");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(R_I_nums[i] < RegisterMap::location_valid_type_size, "in first chunk");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(R_O_nums[i] < RegisterMap::location_valid_type_size, "in first chunk");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(R_G_nums[i] < RegisterMap::location_valid_type_size, "in first chunk");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson bad_mask |= (1LL << R_G_nums[7]); // reserved by libthread
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson for (i = 0; i < 8; i++) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonaddress RegisterMap::pd_location(VMReg regname) const {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Only the GPRs get handled this way
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // don't talk about bad registers
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if ((bad_mask & ((LocationValidType)1 << regname->value())) != 0) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Convert to a GPR
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // 32-bit registers for in, out and local
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // HMM ought to return NULL for any non-concrete (odd) vmreg
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // this all tied up in the fact we put out double oopMaps for
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // register locations. When that is fixed we'd will return NULL
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // (or assert here).
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson#endif // _LP64
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(_younger_window != NULL, "Younger window should be available");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return second_word + (address)&_younger_window[reg->after_save()->sp_offset_in_saved_window()];
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(_window != NULL, "Window should be available");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return second_word + (address)&_window[reg->sp_offset_in_saved_window()];
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Only the window'd GPRs get handled this way; not the globals.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert((_location_valid[0] & bad_mask) == 0, "cannot have special locations for SP,FP,TLS,etc.");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson// We are shifting windows. That means we are moving all %i to %o,
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson// getting rid of all current %l, and keeping all %g. This is only
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson// complicated if any of the location pointers for these are valid.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson// The normal case is that everything is in its standard register window
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson// home, and _location_valid[0] is zero. In that case, this routine
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson// does exactly nothing.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonvoid RegisterMap::shift_individual_registers() {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (!update_map()) return; // this only applies to maps with locations
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // if we cleared some non-%g locations, we may have to do some shifting
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // copy %i0-%i5 to %o0-%o5, if they have special locations
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // This can happen in within stubs which spill argument registers
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // around a dynamic link operation, such as resolve_opt_virtual_call.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson for (int i = 0; i < 8; i++) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson _location[R_O_nums[i]] = _location[R_I_nums[i]];
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonbool frame::safe_for_sender(JavaThread *thread) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson address _UNEXTENDED_SP = (address) unextended_sp();
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // sp must be within the stack
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson bool sp_safe = (_SP <= thread->stack_base()) &&
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson (_SP >= thread->stack_base() - thread->stack_size());
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // unextended sp must be within the stack and above or equal sp
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson bool unextended_sp_safe = (_UNEXTENDED_SP <= thread->stack_base()) &&
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (!unextended_sp_safe) return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // an fp must be within the stack and above (but not equal) sp
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson bool fp_safe = (_FP <= thread->stack_base()) &&
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // We know sp/unextended_sp are safe only fp is questionable here
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // If the current frame is known to the code cache then we can attempt to
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // to construct the sender and do some validation of it. This goes a long way
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // toward eliminating issues when we get in frame construction code
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // First check if frame is complete and tester is reliable
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Unfortunately we can only check frame complete for runtime stubs and nmethod
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // other generic buffer blobs are more problematic so we just assume they are
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // ok. adapter blobs never have a frame complete and are never ok.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (_cb->is_nmethod() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Entry frame checks
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // an entry frame must have a valid fp.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Validate the JavaCallWrapper an entry frame must have
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson address jcw = (address)entry_frame_call_wrapper();
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson bool jcw_safe = (jcw <= thread->stack_base()) && ( jcw > _FP);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson intptr_t* _SENDER_SP = sender_sp(); // sender is actually just _FP
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson address sender_pc = (address)younger_sp[I7->sp_offset_in_saved_window()] + pc_return_offset;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // We must always be able to find a recognizable pc
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (sender_pc == NULL || sender_blob == NULL) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // It should be safe to construct the sender though it might not be valid
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson frame sender(_SENDER_SP, younger_sp, adjusted_stack);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Do we have a valid fp?
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // an fp must be within the stack and above (but not equal) current frame's _FP
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson bool sender_fp_safe = (sender_fp <= thread->stack_base()) &&
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // If the potential sender is the interpreter then we can do some more checking
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return sender.is_interpreted_frame_valid(thread);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Could just be some random pointer within the codeBlob
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // We should never be able to see an adapter if the current frame is something from code cache
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Validate the JavaCallWrapper an entry frame must have
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson address jcw = (address)sender.entry_frame_call_wrapper();
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson bool jcw_safe = (jcw <= thread->stack_base()) && ( jcw > sender_fp);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // If the frame size is 0 something is bad because every nmethod has a non-zero frame size
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // because you must allocate window space
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(!sender_blob->is_nmethod(), "should count return address at least");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // The sender should positively be an nmethod or call_stub. On sparc we might in fact see something else.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // The cause of this is because at a save instruction the O7 we get is a leftover from an earlier
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // window use. So if a runtime stub creates two frames (common in fastdebug/jvmg) then we see the
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // stale pc. So if the sender blob is not something we'd expect we have little choice but to declare
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // the stack unwalkable. pd_get_top_frame_for_signal_handler tries to recover from this by unwinding
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // that initial frame and retrying.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Could put some more validation for the potential non-interpreted sender
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // frame we'd create by calling sender if I could think of any. Wait for next crash in forte...
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // One idea is seeing if the sender_pc we have is one that we'd expect to call to current cb
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // We've validated the potential sender that would be created
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Must be native-compiled frame. Since sender will try and use fp to find
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // linkages it must be safe
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (!fp_safe) return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // could try and do some more potential verification of native frame if we could think of some...
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson// constructors
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson// Construct an unpatchable, deficient frame
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonframe::frame(intptr_t* sp, unpatchable_t, address pc, CodeBlob* cb) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert( (((intptr_t)sp & (wordSize-1)) == 0), "frame constructor passed an invalid sp");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(pc == NULL && cb == NULL || pc != NULL, "can't have a cb and no pc!");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Without a valid unextended_sp() we can't convert the pc to "original"
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant broken");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson#endif // ASSERT
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonframe::frame(intptr_t* sp, intptr_t* younger_sp, bool younger_frame_is_interpreted) :
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // make a deficient frame which doesn't know where its PC is
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson _pc = (address)younger_sp[I7->sp_offset_in_saved_window()] + pc_return_offset;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert( (intptr_t*)younger_sp[FP->sp_offset_in_saved_window()] == (intptr_t*)((intptr_t)sp - STACK_BIAS), "younger_sp must be valid");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Any frame we ever build should always "safe" therefore we should not have to call
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // find_blob_unsafe
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // In case of native stubs, the pc retrieved here might be
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // wrong. (the _last_native_pc will have the right value)
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // So do not put add any asserts on the _pc here.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Check for MethodHandle call sites.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (nm->is_deopt_mh_entry(_pc) || nm->is_method_handle_return(_pc)) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson _sp_adjustment_by_callee = (intptr_t*) ((intptr_t) sp[L7_mh_SP_save->sp_offset_in_saved_window()] + STACK_BIAS) - sp;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // The SP is already adjusted by this MH call site, don't
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // overwrite this value with the wrong interpreter value.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // compute adjustment to this frame's SP made by its interpreted callee
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson _sp_adjustment_by_callee = (intptr_t*) ((intptr_t) younger_sp[I5_savedSP->sp_offset_in_saved_window()] + STACK_BIAS) - sp;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // It is important that the frame is fully constructed when we do
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // this lookup as get_deopt_original_pc() needs a correct value for
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // unextended_sp() which uses _sp_adjustment_by_callee.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson address original_pc = nmethod::get_deopt_original_pc(this);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonintptr_t* frame::interpreter_frame_sender_sp() const {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(is_interpreted_frame(), "interpreted frame expected");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonvoid frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(is_interpreted_frame(), "interpreted frame expected");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson#endif // CC_INTERP
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson// Debugging aid
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson frame f = JavaThread::current()->last_frame();
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson for(int i = 0; i < n; ++i)
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson printf("first frame %d\n", f.is_first_frame() ? 1 : 0);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson printf("interpreted frame %d\n", f.is_interpreted_frame() ? 1 : 0);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson printf("java frame %d\n", f.is_java_frame() ? 1 : 0);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson printf("entry frame %d\n", f.is_entry_frame() ? 1 : 0);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson printf("native frame %d\n", f.is_native_frame() ? 1 : 0);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonframe frame::sender_for_entry_frame(RegisterMap *map) const {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Java frame called from C; skip all C frames and return top C
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // frame of that chunk as the sender
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor();
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(!entry_frame_is_first(), "next Java fp must be non zero");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(jfa->last_Java_sp() > _sp, "must be above this frame on stack");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Since we are walking the stack now this nested anchor is obviously walkable
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // even if it wasn't when it was stacked.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Capture _last_Java_pc (if needed) and mark anchor walkable.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(jfa->last_Java_pc() != NULL, "No captured pc!");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(map->include_argument_oops(), "should be set by clear");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return frame(last_Java_sp, frame::unpatchable, jfa->last_Java_pc());
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonframe frame::sender_for_interpreter_frame(RegisterMap *map) const {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonframe frame::sender_for_compiled_frame(RegisterMap *map) const {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(CodeCache::find_blob_unsafe(_pc) == _cb, "inconsistent");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Default is not to follow arguments; update it accordingly below
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (is_entry_frame()) return sender_for_entry_frame(map);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Note: The version of this operation on any platform with callee-save
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // registers must update the register map (if not null).
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // In order to do this correctly, the various subtypes of
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // of frame (interpreted, compiled, glue, native),
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // must be distinguished. There is no need on SPARC for
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // such distinctions, because all callee-save registers are
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // preserved for all frames via SPARC-specific mechanisms.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // *** HOWEVER, *** if and when we make any floating-point
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // registers callee-saved, then we will have to copy over
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // the RegisterMap update logic from the Intel code.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // The constructor of the sender must know whether this frame is interpreted so it can set the
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // sender's _sp_adjustment_by_callee field. An osr adapter frame was originally
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // interpreted but its pc is in the code cache (for c1 -> osr_frame_return_id stub), so it must be
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // explicitly recognized.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (is_ricochet_frame()) return sender_for_ricochet_frame(map);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson bool frame_is_interpreted = is_interpreted_frame();
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Update the locations of implicitly saved registers to be their
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // addresses in the register save area.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // For %o registers, the addresses of %i registers in the next younger
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // frame are used.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Tell GC to use argument oopmaps for some runtime stubs that need it.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // For C1, the runtime stub might not have oop maps, so set this flag
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // outside of update_register_map.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread()));
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return frame(sp, younger_sp, frame_is_interpreted);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonvoid frame::patch_pc(Thread* thread, address pc) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson StubRoutines::Sparc::flush_callers_register_windows_func()();
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // QQQ this assert is invalid (or too strong anyway) sice _pc could
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // be original pc and frame could have the deopt pc.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // assert(_pc == *O7_addr() + pc_return_offset, "frame has wrong pc");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson tty->print_cr("patch_pc at address 0x%x [0x%x -> 0x%x] ", O7_addr(), _pc, pc);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson address original_pc = nmethod::get_deopt_original_pc(this);
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(original_pc == _pc, "expected original to be stored before patching");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonstatic bool sp_is_valid(intptr_t* old_sp, intptr_t* young_sp, intptr_t* sp) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return (((intptr_t)sp & (2*wordSize-1)) == 0 &&
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson Find the (biased) sp that is just younger than old_sp starting at sp.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson If not found return NULL. Register windows are assumed to be flushed.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonintptr_t* frame::next_younger_sp_or_null(intptr_t* old_sp, intptr_t* sp) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson int max_frames = (old_sp - sp) / 16; // Minimum frame size is 16
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson while(sp != old_sp && sp_is_valid(old_sp, orig_sp, sp)) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // too many frames have gone by; invalid parameters given to this function
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson sp = (intptr_t*)sp[FP->sp_offset_in_saved_window()];
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson Determine if "sp" is a valid stack pointer. "sp" is assumed to be younger than
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson "valid_sp". So if "sp" is valid itself then it should be possible to walk frames
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson from "sp" to "valid_sp". The assumption is that the registers windows for the
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson thread stack in question are flushed.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonbool frame::is_valid_stack_pointer(intptr_t* valid_sp, intptr_t* sp) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return next_younger_sp_or_null(valid_sp, sp) != NULL;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonbool frame::interpreter_frame_equals_unpacked_fp(intptr_t* fp) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(is_interpreted_frame(), "must be interpreter frame");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // set constant pool cache entry for interpreter
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson *interpreter_frame_cpoolcache_addr() = m->constants()->cache();
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilsonbool frame::is_interpreted_frame_valid(JavaThread* thread) const {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // Is there anything to do?
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson assert(is_interpreted_frame(), "Not an interpreted frame");
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // These are reasonable sanity checks
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (fp() == 0 || (intptr_t(fp()) & (2*wordSize-1)) != 0) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (sp() == 0 || (intptr_t(sp()) & (2*wordSize-1)) != 0) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson const intptr_t interpreter_frame_initial_sp_offset = interpreter_frame_vm_local_words;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (fp() + interpreter_frame_initial_sp_offset < sp()) {
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // These are hacks to keep us out of trouble.
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // The problem with these is that they mask other problems
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (fp() <= sp()) { // this attempts to deal with unsigned comparison above
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // do some validation of frame elements
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // first the method
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson methodOop m = *interpreter_frame_method_addr();
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // validate the method we'd find in this potential sender
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson if (!Universe::heap()->is_valid_method(m)) return false;
95d64d67b411fa6104ce79023a63f460000952aeneil_a_wilson // stack frames shouldn't be much larger than max_stack elements
_last_Java_pc = (address) _post_Java_sp[ I7->sp_offset_in_saved_window()] + frame::pc_return_offset;
if (walkable()) return;
#ifdef CC_INTERP
#ifdef _LP64
switch (type) {
case T_OBJECT:
case T_ARRAY: {
#ifdef CC_INTERP
default : ShouldNotReachHere();
switch(type) {
case T_OBJECT:
case T_ARRAY: {
default : ShouldNotReachHere();
return type;
#ifdef ASSERT
if (is_interpreted_frame()) {
if (!is_compiled_frame()) {