17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "c1/c1_MacroAssembler.hpp"
26 #include "c1/c1_Runtime1.hpp"
27 #include "code/compiledIC.hpp"
28 #include "compiler/compilerDefinitions.inline.hpp"
29 #include "gc/shared/barrierSet.hpp"
30 #include "gc/shared/barrierSetAssembler.hpp"
31 #include "gc/shared/collectedHeap.hpp"
32 #include "gc/shared/tlab_globals.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "oops/arrayOop.hpp"
35 #include "oops/markWord.hpp"
36 #include "runtime/basicLock.hpp"
37 #include "runtime/globals.hpp"
38 #include "runtime/os.hpp"
39 #include "runtime/sharedRuntime.hpp"
40 #include "runtime/stubRoutines.hpp"
41 #include "utilities/checkedCast.hpp"
42 #include "utilities/globalDefinitions.hpp"
43
44 int C1_MacroAssembler::lock_object(Register hdr, Register obj, Register basic_lock, Register tmp, Label& slow_case) {
45 assert(hdr == rax, "hdr must be rax, for the cmpxchg instruction");
46 assert_different_registers(hdr, obj, basic_lock, tmp);
47 int null_check_offset = -1;
48
49 verify_oop(obj);
50
51 // save object being locked into the BasicObjectLock
52 movptr(Address(basic_lock, BasicObjectLock::obj_offset()), obj);
53
54 null_check_offset = offset();
55
56 lightweight_lock(basic_lock, obj, hdr, tmp, slow_case);
65 // load object
66 movptr(obj, Address(basic_lock, BasicObjectLock::obj_offset()));
67 verify_oop(obj);
68
69 lightweight_unlock(obj, rax, hdr, slow_case);
70 }
71
72
73 // Defines obj, preserves var_size_in_bytes
74 void C1_MacroAssembler::try_allocate(Register obj, Register var_size_in_bytes, int con_size_in_bytes, Register t1, Register t2, Label& slow_case) {
75 if (UseTLAB) {
76 tlab_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case);
77 } else {
78 jmp(slow_case);
79 }
80 }
81
82
83 void C1_MacroAssembler::initialize_header(Register obj, Register klass, Register len, Register t1, Register t2) {
84 assert_different_registers(obj, klass, len, t1, t2);
85 if (UseCompactObjectHeaders) {
86 movptr(t1, Address(klass, Klass::prototype_header_offset()));
87 movptr(Address(obj, oopDesc::mark_offset_in_bytes()), t1);
88 } else if (UseCompressedClassPointers) { // Take care not to kill klass
89 movptr(Address(obj, oopDesc::mark_offset_in_bytes()), checked_cast<int32_t>(markWord::prototype().value()));
90 movptr(t1, klass);
91 encode_klass_not_null(t1, rscratch1);
92 movl(Address(obj, oopDesc::klass_offset_in_bytes()), t1);
93 } else {
94 movptr(Address(obj, oopDesc::mark_offset_in_bytes()), checked_cast<int32_t>(markWord::prototype().value()));
95 movptr(Address(obj, oopDesc::klass_offset_in_bytes()), klass);
96 }
97
98 if (len->is_valid()) {
99 movl(Address(obj, arrayOopDesc::length_offset_in_bytes()), len);
100 int base_offset = arrayOopDesc::length_offset_in_bytes() + BytesPerInt;
101 if (!is_aligned(base_offset, BytesPerWord)) {
102 assert(is_aligned(base_offset, BytesPerInt), "must be 4-byte aligned");
103 // Clear gap/first 4 bytes following the length field.
104 xorl(t1, t1);
105 movl(Address(obj, base_offset), t1);
106 }
107 } else if (UseCompressedClassPointers && !UseCompactObjectHeaders) {
108 xorptr(t1, t1);
109 store_klass_gap(obj, t1);
110 }
111 }
112
113
114 // preserves obj, destroys len_in_bytes
115 void C1_MacroAssembler::initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1) {
205
206 initialize_header(obj, klass, len, t1, t2);
207
208 // clear rest of allocated space
209 if (zero_array) {
210 const Register len_zero = len;
211 // Align-up to word boundary, because we clear the 4 bytes potentially
212 // following the length field in initialize_header().
213 int base_offset = align_up(base_offset_in_bytes, BytesPerWord);
214 initialize_body(obj, arr_size, base_offset, len_zero);
215 }
216
217 if (CURRENT_ENV->dtrace_alloc_probes()) {
218 assert(obj == rax, "must be");
219 call(RuntimeAddress(Runtime1::entry_for(StubId::c1_dtrace_object_alloc_id)));
220 }
221
222 verify_oop(obj);
223 }
224
225 void C1_MacroAssembler::build_frame(int frame_size_in_bytes, int bang_size_in_bytes) {
226 assert(bang_size_in_bytes >= frame_size_in_bytes, "stack bang size incorrect");
227 // Make sure there is enough stack space for this method's activation.
228 // Note that we do this before doing an enter(). This matches the
229 // ordering of C2's stack overflow check / rsp decrement and allows
230 // the SharedRuntime stack overflow handling to be consistent
231 // between the two compilers.
232 generate_stack_overflow_check(bang_size_in_bytes);
233
234 push(rbp);
235 if (PreserveFramePointer) {
236 mov(rbp, rsp);
237 }
238 decrement(rsp, frame_size_in_bytes); // does not emit code for frame_size == 0
239
240 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
241 // C1 code is not hot enough to micro optimize the nmethod entry barrier with an out-of-line stub
242 bs->nmethod_entry_barrier(this, nullptr /* slow_path */, nullptr /* continuation */);
243 }
244
245
246 void C1_MacroAssembler::remove_frame(int frame_size_in_bytes) {
247 increment(rsp, frame_size_in_bytes); // Does not emit code for frame_size == 0
248 pop(rbp);
249 }
250
251
252 void C1_MacroAssembler::verified_entry(bool breakAtEntry) {
253 if (breakAtEntry) int3();
254 // build frame
255 }
256
257 void C1_MacroAssembler::load_parameter(int offset_in_words, Register reg) {
258 // rbp, + 0: link
259 // + 1: return address
260 // + 2: argument with offset 0
261 // + 3: argument with offset 1
262 // + 4: ...
263
264 movptr(reg, Address(rbp, (offset_in_words + 2) * BytesPerWord));
265 }
266
267 #ifndef PRODUCT
268
269 void C1_MacroAssembler::verify_stack_oop(int stack_offset) {
270 if (!VerifyOops) return;
271 verify_oop_addr(Address(rsp, stack_offset));
272 }
273
274 void C1_MacroAssembler::verify_not_null_oop(Register r) {
275 if (!VerifyOops) return;
276 Label not_null;
|
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "c1/c1_MacroAssembler.hpp"
26 #include "c1/c1_Runtime1.hpp"
27 #include "code/compiledIC.hpp"
28 #include "compiler/compilerDefinitions.inline.hpp"
29 #include "gc/shared/barrierSet.hpp"
30 #include "gc/shared/barrierSetAssembler.hpp"
31 #include "gc/shared/collectedHeap.hpp"
32 #include "gc/shared/tlab_globals.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "oops/arrayOop.hpp"
35 #include "oops/markWord.hpp"
36 #include "runtime/basicLock.hpp"
37 #include "runtime/frame.inline.hpp"
38 #include "runtime/globals.hpp"
39 #include "runtime/os.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "runtime/stubRoutines.hpp"
42 #include "utilities/checkedCast.hpp"
43 #include "utilities/globalDefinitions.hpp"
44
45 int C1_MacroAssembler::lock_object(Register hdr, Register obj, Register basic_lock, Register tmp, Label& slow_case) {
46 assert(hdr == rax, "hdr must be rax, for the cmpxchg instruction");
47 assert_different_registers(hdr, obj, basic_lock, tmp);
48 int null_check_offset = -1;
49
50 verify_oop(obj);
51
52 // save object being locked into the BasicObjectLock
53 movptr(Address(basic_lock, BasicObjectLock::obj_offset()), obj);
54
55 null_check_offset = offset();
56
57 lightweight_lock(basic_lock, obj, hdr, tmp, slow_case);
66 // load object
67 movptr(obj, Address(basic_lock, BasicObjectLock::obj_offset()));
68 verify_oop(obj);
69
70 lightweight_unlock(obj, rax, hdr, slow_case);
71 }
72
73
74 // Defines obj, preserves var_size_in_bytes
75 void C1_MacroAssembler::try_allocate(Register obj, Register var_size_in_bytes, int con_size_in_bytes, Register t1, Register t2, Label& slow_case) {
76 if (UseTLAB) {
77 tlab_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case);
78 } else {
79 jmp(slow_case);
80 }
81 }
82
83
84 void C1_MacroAssembler::initialize_header(Register obj, Register klass, Register len, Register t1, Register t2) {
85 assert_different_registers(obj, klass, len, t1, t2);
86 if (UseCompactObjectHeaders || EnableValhalla) {
87 // COH: Markword contains class pointer which is only known at runtime.
88 // Valhalla: Could have value class which has a different prototype header to a normal object.
89 // In both cases, we need to fetch dynamically.
90 movptr(t1, Address(klass, Klass::prototype_header_offset()));
91 movptr(Address(obj, oopDesc::mark_offset_in_bytes()), t1);
92 } else {
93 // Otherwise: Can use the statically computed prototype header which is the same for every object.
94 movptr(Address(obj, oopDesc::mark_offset_in_bytes()), checked_cast<int32_t>(markWord::prototype().value()));
95 }
96 if (!UseCompactObjectHeaders) {
97 // COH: Markword already contains class pointer. Nothing else to do.
98 // Otherwise: Fetch klass pointer following the markword
99 if (UseCompressedClassPointers) { // Take care not to kill klass
100 movptr(t1, klass);
101 encode_klass_not_null(t1, rscratch1);
102 movl(Address(obj, oopDesc::klass_offset_in_bytes()), t1);
103 } else {
104 movptr(Address(obj, oopDesc::klass_offset_in_bytes()), klass);
105 }
106 }
107
108 if (len->is_valid()) {
109 movl(Address(obj, arrayOopDesc::length_offset_in_bytes()), len);
110 int base_offset = arrayOopDesc::length_offset_in_bytes() + BytesPerInt;
111 if (!is_aligned(base_offset, BytesPerWord)) {
112 assert(is_aligned(base_offset, BytesPerInt), "must be 4-byte aligned");
113 // Clear gap/first 4 bytes following the length field.
114 xorl(t1, t1);
115 movl(Address(obj, base_offset), t1);
116 }
117 } else if (UseCompressedClassPointers && !UseCompactObjectHeaders) {
118 xorptr(t1, t1);
119 store_klass_gap(obj, t1);
120 }
121 }
122
123
124 // preserves obj, destroys len_in_bytes
125 void C1_MacroAssembler::initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1) {
215
216 initialize_header(obj, klass, len, t1, t2);
217
218 // clear rest of allocated space
219 if (zero_array) {
220 const Register len_zero = len;
221 // Align-up to word boundary, because we clear the 4 bytes potentially
222 // following the length field in initialize_header().
223 int base_offset = align_up(base_offset_in_bytes, BytesPerWord);
224 initialize_body(obj, arr_size, base_offset, len_zero);
225 }
226
227 if (CURRENT_ENV->dtrace_alloc_probes()) {
228 assert(obj == rax, "must be");
229 call(RuntimeAddress(Runtime1::entry_for(StubId::c1_dtrace_object_alloc_id)));
230 }
231
232 verify_oop(obj);
233 }
234
235 void C1_MacroAssembler::build_frame_helper(int frame_size_in_bytes, int sp_offset_for_orig_pc, int sp_inc, bool reset_orig_pc, bool needs_stack_repair) {
236 push(rbp);
237 if (PreserveFramePointer) {
238 mov(rbp, rsp);
239 }
240 decrement(rsp, frame_size_in_bytes);
241
242 if (needs_stack_repair) {
243 // Save stack increment (also account for fixed framesize and rbp)
244 assert((sp_inc & (StackAlignmentInBytes-1)) == 0, "stack increment not aligned");
245 int real_frame_size = sp_inc + frame_size_in_bytes + wordSize;
246 movptr(Address(rsp, frame_size_in_bytes - wordSize), real_frame_size);
247 }
248 if (reset_orig_pc) {
249 // Zero orig_pc to detect deoptimization during buffering in the entry points
250 movptr(Address(rsp, sp_offset_for_orig_pc), 0);
251 }
252 }
253
254 void C1_MacroAssembler::build_frame(int frame_size_in_bytes, int bang_size_in_bytes, int sp_offset_for_orig_pc, bool needs_stack_repair, bool has_scalarized_args, Label* verified_inline_entry_label) {
255 // Make sure there is enough stack space for this method's activation.
256 // Note that we do this before doing an enter(). This matches the
257 // ordering of C2's stack overflow check / rsp decrement and allows
258 // the SharedRuntime stack overflow handling to be consistent
259 // between the two compilers.
260 assert(bang_size_in_bytes >= frame_size_in_bytes, "stack bang size incorrect");
261 generate_stack_overflow_check(bang_size_in_bytes);
262
263 build_frame_helper(frame_size_in_bytes, sp_offset_for_orig_pc, 0, has_scalarized_args, needs_stack_repair);
264
265 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
266 // C1 code is not hot enough to micro optimize the nmethod entry barrier with an out-of-line stub
267 bs->nmethod_entry_barrier(this, nullptr /* slow_path */, nullptr /* continuation */);
268
269 if (verified_inline_entry_label != nullptr) {
270 // Jump here from the scalarized entry points that already created the frame.
271 bind(*verified_inline_entry_label);
272 }
273 }
274
275 void C1_MacroAssembler::verified_entry(bool breakAtEntry) {
276 if (breakAtEntry) int3();
277 // build frame
278 }
279
280 int C1_MacroAssembler::scalarized_entry(const CompiledEntrySignature* ces, int frame_size_in_bytes, int bang_size_in_bytes, int sp_offset_for_orig_pc, Label& verified_inline_entry_label, bool is_inline_ro_entry) {
281 assert(InlineTypePassFieldsAsArgs, "sanity");
282 // Make sure there is enough stack space for this method's activation.
283 assert(bang_size_in_bytes >= frame_size_in_bytes, "stack bang size incorrect");
284 generate_stack_overflow_check(bang_size_in_bytes);
285
286 GrowableArray<SigEntry>* sig = ces->sig();
287 GrowableArray<SigEntry>* sig_cc = is_inline_ro_entry ? ces->sig_cc_ro() : ces->sig_cc();
288 VMRegPair* regs = ces->regs();
289 VMRegPair* regs_cc = is_inline_ro_entry ? ces->regs_cc_ro() : ces->regs_cc();
290 int args_on_stack = ces->args_on_stack();
291 int args_on_stack_cc = is_inline_ro_entry ? ces->args_on_stack_cc_ro() : ces->args_on_stack_cc();
292
293 assert(sig->length() <= sig_cc->length(), "Zero-sized inline class not allowed!");
294 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig_cc->length());
295 int args_passed = sig->length();
296 int args_passed_cc = SigEntry::fill_sig_bt(sig_cc, sig_bt);
297
298 // Create a temp frame so we can call into the runtime. It must be properly set up to accommodate GC.
299 build_frame_helper(frame_size_in_bytes, sp_offset_for_orig_pc, 0, true, ces->c1_needs_stack_repair());
300
301 // The runtime call might safepoint, make sure nmethod entry barrier is executed
302 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
303 // C1 code is not hot enough to micro optimize the nmethod entry barrier with an out-of-line stub
304 bs->nmethod_entry_barrier(this, nullptr /* slow_path */, nullptr /* continuation */);
305
306 // FIXME -- call runtime only if we cannot in-line allocate all the incoming inline type args.
307 movptr(rbx, (intptr_t)(ces->method()));
308 if (is_inline_ro_entry) {
309 call(RuntimeAddress(Runtime1::entry_for(StubId::c1_buffer_inline_args_no_receiver_id)));
310 } else {
311 call(RuntimeAddress(Runtime1::entry_for(StubId::c1_buffer_inline_args_id)));
312 }
313 int rt_call_offset = offset();
314
315 // Remove the temp frame
316 addptr(rsp, frame_size_in_bytes);
317 pop(rbp);
318
319 // Check if we need to extend the stack for packing
320 int sp_inc = 0;
321 if (args_on_stack > args_on_stack_cc) {
322 sp_inc = extend_stack_for_inline_args(args_on_stack);
323 }
324
325 shuffle_inline_args(true, is_inline_ro_entry, sig_cc,
326 args_passed_cc, args_on_stack_cc, regs_cc, // from
327 args_passed, args_on_stack, regs, // to
328 sp_inc, rax);
329
330 // Create the real frame. Below jump will then skip over the stack banging and frame
331 // setup code in the verified_inline_entry (which has a different real_frame_size).
332 build_frame_helper(frame_size_in_bytes, sp_offset_for_orig_pc, sp_inc, false, ces->c1_needs_stack_repair());
333
334 jmp(verified_inline_entry_label);
335 return rt_call_offset;
336 }
337
338 void C1_MacroAssembler::load_parameter(int offset_in_words, Register reg) {
339 // rbp, + 0: link
340 // + 1: return address
341 // + 2: argument with offset 0
342 // + 3: argument with offset 1
343 // + 4: ...
344
345 movptr(reg, Address(rbp, (offset_in_words + 2) * BytesPerWord));
346 }
347
348 #ifndef PRODUCT
349
350 void C1_MacroAssembler::verify_stack_oop(int stack_offset) {
351 if (!VerifyOops) return;
352 verify_oop_addr(Address(rsp, stack_offset));
353 }
354
355 void C1_MacroAssembler::verify_not_null_oop(Register r) {
356 if (!VerifyOops) return;
357 Label not_null;
|