16 * 2 along with this work; if not, write to the Free Software Foundation,
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 fast_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 fast_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 { // 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 }
94
95 if (len->is_valid()) {
96 movl(Address(obj, arrayOopDesc::length_offset_in_bytes()), len);
97 int base_offset = arrayOopDesc::length_offset_in_bytes() + BytesPerInt;
98 if (!is_aligned(base_offset, BytesPerWord)) {
99 assert(is_aligned(base_offset, BytesPerInt), "must be 4-byte aligned");
100 // Clear gap/first 4 bytes following the length field.
101 xorl(t1, t1);
102 movl(Address(obj, base_offset), t1);
103 }
104 } else if (!UseCompactObjectHeaders) {
105 xorptr(t1, t1);
106 store_klass_gap(obj, t1);
107 }
108 }
109
110
111 // preserves obj, destroys len_in_bytes
202
203 initialize_header(obj, klass, len, t1, t2);
204
205 // clear rest of allocated space
206 if (zero_array) {
207 const Register len_zero = len;
208 // Align-up to word boundary, because we clear the 4 bytes potentially
209 // following the length field in initialize_header().
210 int base_offset = align_up(base_offset_in_bytes, BytesPerWord);
211 initialize_body(obj, arr_size, base_offset, len_zero);
212 }
213
214 if (CURRENT_ENV->dtrace_alloc_probes()) {
215 assert(obj == rax, "must be");
216 call(RuntimeAddress(Runtime1::entry_for(StubId::c1_dtrace_object_alloc_id)));
217 }
218
219 verify_oop(obj);
220 }
221
222 void C1_MacroAssembler::build_frame(int frame_size_in_bytes, int bang_size_in_bytes) {
223 assert(bang_size_in_bytes >= frame_size_in_bytes, "stack bang size incorrect");
224 // Make sure there is enough stack space for this method's activation.
225 // Note that we do this before doing an enter(). This matches the
226 // ordering of C2's stack overflow check / rsp decrement and allows
227 // the SharedRuntime stack overflow handling to be consistent
228 // between the two compilers.
229 generate_stack_overflow_check(bang_size_in_bytes);
230
231 push(rbp);
232 if (PreserveFramePointer) {
233 mov(rbp, rsp);
234 }
235 decrement(rsp, frame_size_in_bytes); // does not emit code for frame_size == 0
236
237 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
238 // C1 code is not hot enough to micro optimize the nmethod entry barrier with an out-of-line stub
239 bs->nmethod_entry_barrier(this, nullptr /* slow_path */, nullptr /* continuation */);
240 }
241
242
243 void C1_MacroAssembler::remove_frame(int frame_size_in_bytes) {
244 increment(rsp, frame_size_in_bytes); // Does not emit code for frame_size == 0
245 pop(rbp);
246 }
247
248
249 void C1_MacroAssembler::verified_entry(bool breakAtEntry) {
250 if (breakAtEntry) int3();
251 // build frame
252 }
253
254 void C1_MacroAssembler::load_parameter(int offset_in_words, Register reg) {
255 // rbp, + 0: link
256 // + 1: return address
257 // + 2: argument with offset 0
258 // + 3: argument with offset 1
259 // + 4: ...
260
261 movptr(reg, Address(rbp, (offset_in_words + 2) * BytesPerWord));
262 }
263
264 #ifndef PRODUCT
265
266 void C1_MacroAssembler::verify_stack_oop(int stack_offset) {
267 if (!VerifyOops) return;
268 verify_oop_addr(Address(rsp, stack_offset));
269 }
270
271 void C1_MacroAssembler::verify_not_null_oop(Register r) {
272 if (!VerifyOops) return;
273 Label not_null;
|
16 * 2 along with this work; if not, write to the Free Software Foundation,
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/arguments.hpp"
37 #include "runtime/basicLock.hpp"
38 #include "runtime/frame.inline.hpp"
39 #include "runtime/globals.hpp"
40 #include "runtime/os.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "runtime/stubRoutines.hpp"
43 #include "utilities/checkedCast.hpp"
44 #include "utilities/globalDefinitions.hpp"
45
46 int C1_MacroAssembler::lock_object(Register hdr, Register obj, Register basic_lock, Register tmp, Label& slow_case) {
47 assert(hdr == rax, "hdr must be rax, for the cmpxchg instruction");
48 assert_different_registers(hdr, obj, basic_lock, tmp);
49 int null_check_offset = -1;
50
51 verify_oop(obj);
52
53 // save object being locked into the BasicObjectLock
54 movptr(Address(basic_lock, BasicObjectLock::obj_offset()), obj);
55
56 null_check_offset = offset();
57
58 fast_lock(basic_lock, obj, hdr, tmp, slow_case);
67 // load object
68 movptr(obj, Address(basic_lock, BasicObjectLock::obj_offset()));
69 verify_oop(obj);
70
71 fast_unlock(obj, rax, hdr, slow_case);
72 }
73
74
75 // Defines obj, preserves var_size_in_bytes
76 void C1_MacroAssembler::try_allocate(Register obj, Register var_size_in_bytes, int con_size_in_bytes, Register t1, Register t2, Label& slow_case) {
77 if (UseTLAB) {
78 tlab_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case);
79 } else {
80 jmp(slow_case);
81 }
82 }
83
84
85 void C1_MacroAssembler::initialize_header(Register obj, Register klass, Register len, Register t1, Register t2) {
86 assert_different_registers(obj, klass, len, t1, t2);
87 if (UseCompactObjectHeaders || Arguments::is_valhalla_enabled()) {
88 // COH: Markword contains class pointer which is only known at runtime.
89 // Valhalla: Could have value class which has a different prototype header to a normal object.
90 // In both cases, we need to fetch dynamically.
91 movptr(t1, Address(klass, Klass::prototype_header_offset()));
92 movptr(Address(obj, oopDesc::mark_offset_in_bytes()), t1);
93 } else {
94 // Otherwise: Can use the statically computed prototype header which is the same for every object.
95 movptr(Address(obj, oopDesc::mark_offset_in_bytes()), checked_cast<int32_t>(markWord::prototype().value()));
96 }
97 if (!UseCompactObjectHeaders) {
98 // COH: Markword already contains class pointer. Nothing else to do.
99 // Otherwise: Store encoded klass pointer following the markword
100 movptr(t1, klass);
101 encode_klass_not_null(t1, rscratch1); // Take care not to kill klass
102 movl(Address(obj, oopDesc::klass_offset_in_bytes()), t1);
103 }
104
105 if (len->is_valid()) {
106 movl(Address(obj, arrayOopDesc::length_offset_in_bytes()), len);
107 int base_offset = arrayOopDesc::length_offset_in_bytes() + BytesPerInt;
108 if (!is_aligned(base_offset, BytesPerWord)) {
109 assert(is_aligned(base_offset, BytesPerInt), "must be 4-byte aligned");
110 // Clear gap/first 4 bytes following the length field.
111 xorl(t1, t1);
112 movl(Address(obj, base_offset), t1);
113 }
114 } else if (!UseCompactObjectHeaders) {
115 xorptr(t1, t1);
116 store_klass_gap(obj, t1);
117 }
118 }
119
120
121 // preserves obj, destroys len_in_bytes
212
213 initialize_header(obj, klass, len, t1, t2);
214
215 // clear rest of allocated space
216 if (zero_array) {
217 const Register len_zero = len;
218 // Align-up to word boundary, because we clear the 4 bytes potentially
219 // following the length field in initialize_header().
220 int base_offset = align_up(base_offset_in_bytes, BytesPerWord);
221 initialize_body(obj, arr_size, base_offset, len_zero);
222 }
223
224 if (CURRENT_ENV->dtrace_alloc_probes()) {
225 assert(obj == rax, "must be");
226 call(RuntimeAddress(Runtime1::entry_for(StubId::c1_dtrace_object_alloc_id)));
227 }
228
229 verify_oop(obj);
230 }
231
232 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) {
233 push(rbp);
234 #ifdef ASSERT
235 if (sp_inc > 0) {
236 movl(Address(rsp, 0), badRegWordVal);
237 movl(Address(rsp, VMRegImpl::stack_slot_size), badRegWordVal);
238 }
239 #endif
240 if (PreserveFramePointer) {
241 mov(rbp, rsp);
242 }
243 decrement(rsp, frame_size_in_bytes);
244
245 if (needs_stack_repair) {
246 // Save stack increment (also account for fixed framesize and rbp)
247 assert((sp_inc & (StackAlignmentInBytes-1)) == 0, "stack increment not aligned");
248 int real_frame_size = sp_inc + frame_size_in_bytes;
249 movptr(Address(rsp, frame_size_in_bytes - wordSize), real_frame_size);
250 }
251 if (reset_orig_pc) {
252 // Zero orig_pc to detect deoptimization during buffering in the entry points
253 movptr(Address(rsp, sp_offset_for_orig_pc), 0);
254 }
255 }
256
257 void C1_MacroAssembler::build_frame(int frame_size_in_bytes, int bang_size_in_bytes,
258 int sp_offset_for_orig_pc,
259 bool needs_stack_repair, bool has_scalarized_args,
260 Label* verified_inline_entry_label) {
261 // Make sure there is enough stack space for this method's activation.
262 // Note that we do this before doing an enter(). This matches the
263 // ordering of C2's stack overflow check / rsp decrement and allows
264 // the SharedRuntime stack overflow handling to be consistent
265 // between the two compilers.
266 assert(bang_size_in_bytes >= frame_size_in_bytes, "stack bang size incorrect");
267 generate_stack_overflow_check(bang_size_in_bytes);
268
269 build_frame_helper(frame_size_in_bytes, sp_offset_for_orig_pc, 0, has_scalarized_args, needs_stack_repair);
270
271 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
272 // C1 code is not hot enough to micro optimize the nmethod entry barrier with an out-of-line stub
273 bs->nmethod_entry_barrier(this, nullptr /* slow_path */, nullptr /* continuation */);
274
275 if (verified_inline_entry_label != nullptr) {
276 // Jump here from the scalarized entry points that already created the frame.
277 bind(*verified_inline_entry_label);
278 }
279 }
280
281
282 void C1_MacroAssembler::verified_entry(bool breakAtEntry) {
283 if (breakAtEntry) int3();
284 // build frame
285 }
286
287 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) {
288 assert(InlineTypePassFieldsAsArgs, "sanity");
289 // Make sure there is enough stack space for this method's activation.
290 assert(bang_size_in_bytes >= frame_size_in_bytes, "stack bang size incorrect");
291 generate_stack_overflow_check(bang_size_in_bytes);
292
293 GrowableArray<SigEntry>* sig = ces->sig();
294 GrowableArray<SigEntry>* sig_cc = is_inline_ro_entry ? ces->sig_cc_ro() : ces->sig_cc();
295 VMRegPair* regs = ces->regs();
296 VMRegPair* regs_cc = is_inline_ro_entry ? ces->regs_cc_ro() : ces->regs_cc();
297 int args_on_stack = ces->args_on_stack();
298 int args_on_stack_cc = is_inline_ro_entry ? ces->args_on_stack_cc_ro() : ces->args_on_stack_cc();
299
300 assert(sig->length() <= sig_cc->length(), "Zero-sized inline class not allowed!");
301 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig_cc->length());
302 int args_passed = sig->length();
303 int args_passed_cc = SigEntry::fill_sig_bt(sig_cc, sig_bt);
304
305 // Create a temp frame so we can call into the runtime. It must be properly set up to accommodate GC.
306 build_frame_helper(frame_size_in_bytes, sp_offset_for_orig_pc, 0, true, ces->c1_needs_stack_repair());
307
308 // The runtime call might safepoint, make sure nmethod entry barrier is executed
309 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
310 // C1 code is not hot enough to micro optimize the nmethod entry barrier with an out-of-line stub
311 bs->nmethod_entry_barrier(this, nullptr /* slow_path */, nullptr /* continuation */);
312
313 movptr(rbx, (intptr_t)(ces->method()));
314 if (is_inline_ro_entry) {
315 call(RuntimeAddress(Runtime1::entry_for(StubId::c1_buffer_inline_args_no_receiver_id)));
316 } else {
317 call(RuntimeAddress(Runtime1::entry_for(StubId::c1_buffer_inline_args_id)));
318 }
319 int rt_call_offset = offset();
320
321 // Remove the temp frame
322 addptr(rsp, frame_size_in_bytes);
323 pop(rbp);
324
325 // Check if we need to extend the stack for packing
326 int sp_inc = 0;
327 if (args_on_stack > args_on_stack_cc) {
328 sp_inc = extend_stack_for_inline_args(args_on_stack);
329 }
330
331 shuffle_inline_args(true, is_inline_ro_entry, sig_cc,
332 args_passed_cc, args_on_stack_cc, regs_cc, // from
333 args_passed, args_on_stack, regs, // to
334 sp_inc, rax);
335
336 // Create the real frame. Below jump will then skip over the stack banging and frame
337 // setup code in the verified_inline_entry (which has a different real_frame_size).
338 build_frame_helper(frame_size_in_bytes, sp_offset_for_orig_pc, sp_inc, false, ces->c1_needs_stack_repair());
339
340 jmp(verified_inline_entry_label);
341 return rt_call_offset;
342 }
343
344 void C1_MacroAssembler::load_parameter(int offset_in_words, Register reg) {
345 // rbp, + 0: link
346 // + 1: return address
347 // + 2: argument with offset 0
348 // + 3: argument with offset 1
349 // + 4: ...
350
351 movptr(reg, Address(rbp, (offset_in_words + 2) * BytesPerWord));
352 }
353
354 #ifndef PRODUCT
355
356 void C1_MacroAssembler::verify_stack_oop(int stack_offset) {
357 if (!VerifyOops) return;
358 verify_oop_addr(Address(rsp, stack_offset));
359 }
360
361 void C1_MacroAssembler::verify_not_null_oop(Register r) {
362 if (!VerifyOops) return;
363 Label not_null;
|