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java-9-openjdk/JDK-8195685-cannot-build-wi...

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# HG changeset patch
# User aph
# Date 1516971866 -3600
# Fri Jan 26 14:04:26 2018 +0100
# Node ID a8b7d1fd5884bcfe816df11f16dd71aec7bdacdb
# Parent f6418daf023ea194db63519e3d13ca6c252028ed
8195685: AArch64: AArch64 cannot build with JDK-8174962
Reviewed-by: adinn, njian
diff --git a/src/cpu/aarch64/vm/macroAssembler_aarch64.cpp b/src/cpu/aarch64/vm/macroAssembler_aarch64.cpp
--- a/src/cpu/aarch64/vm/macroAssembler_aarch64.cpp
+++ b/src/cpu/aarch64/vm/macroAssembler_aarch64.cpp
@@ -927,8 +927,12 @@
RegisterOrConstant itable_index,
Register method_result,
Register scan_temp,
- Label& L_no_such_interface) {
- assert_different_registers(recv_klass, intf_klass, method_result, scan_temp);
+ Label& L_no_such_interface,
+ bool return_method) {
+ assert_different_registers(recv_klass, intf_klass, scan_temp);
+ assert_different_registers(method_result, intf_klass, scan_temp);
+ assert(recv_klass != method_result || !return_method,
+ "recv_klass can be destroyed when method isn't needed");
assert(itable_index.is_constant() || itable_index.as_register() == method_result,
"caller must use same register for non-constant itable index as for method");
@@ -946,12 +950,14 @@
lea(scan_temp, Address(recv_klass, scan_temp, Address::lsl(3)));
add(scan_temp, scan_temp, vtable_base);
- // Adjust recv_klass by scaled itable_index, so we can free itable_index.
- assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
- // lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off));
- lea(recv_klass, Address(recv_klass, itable_index, Address::lsl(3)));
- if (itentry_off)
- add(recv_klass, recv_klass, itentry_off);
+ if (return_method) {
+ // Adjust recv_klass by scaled itable_index, so we can free itable_index.
+ assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
+ // lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off));
+ lea(recv_klass, Address(recv_klass, itable_index, Address::lsl(3)));
+ if (itentry_off)
+ add(recv_klass, recv_klass, itentry_off);
+ }
// for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) {
// if (scan->interface() == intf) {
@@ -985,8 +991,10 @@
bind(found_method);
// Got a hit.
- ldr(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset_in_bytes()));
- ldr(method_result, Address(recv_klass, scan_temp));
+ if (return_method) {
+ ldrw(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset_in_bytes()));
+ ldr(method_result, Address(recv_klass, scan_temp, Address::uxtw(0)));
+ }
}
// virtual method calling
diff --git a/src/cpu/aarch64/vm/macroAssembler_aarch64.hpp b/src/cpu/aarch64/vm/macroAssembler_aarch64.hpp
--- a/src/cpu/aarch64/vm/macroAssembler_aarch64.hpp
+++ b/src/cpu/aarch64/vm/macroAssembler_aarch64.hpp
@@ -870,7 +870,8 @@
RegisterOrConstant itable_index,
Register method_result,
Register scan_temp,
- Label& no_such_interface);
+ Label& no_such_interface,
+ bool return_method = true);
// virtual method calling
// n.b. x86 allows RegisterOrConstant for vtable_index
diff --git a/src/cpu/aarch64/vm/templateTable_aarch64.cpp b/src/cpu/aarch64/vm/templateTable_aarch64.cpp
--- a/src/cpu/aarch64/vm/templateTable_aarch64.cpp
+++ b/src/cpu/aarch64/vm/templateTable_aarch64.cpp
@@ -3279,11 +3279,11 @@
transition(vtos, vtos);
assert(byte_no == f1_byte, "use this argument");
- prepare_invoke(byte_no, r0, rmethod, // get f1 Klass*, f2 itable index
+ prepare_invoke(byte_no, r0, rmethod, // get f1 Klass*, f2 Method*
r2, r3); // recv, flags
// r0: interface klass (from f1)
- // rmethod: itable index (from f2)
+ // rmethod: method (from f2)
// r2: receiver
// r3: flags
@@ -3302,11 +3302,28 @@
__ null_check(r2, oopDesc::klass_offset_in_bytes());
__ load_klass(r3, r2);
+ Label no_such_interface, no_such_method;
+
+ // Receiver subtype check against REFC.
+ // Superklass in r0. Subklass in r3. Blows rscratch2, r13
+ __ lookup_interface_method(// inputs: rec. class, interface, itable index
+ r3, r0, noreg,
+ // outputs: scan temp. reg, scan temp. reg
+ rscratch2, r13,
+ no_such_interface,
+ /*return_method=*/false);
+
// profile this call
__ profile_virtual_call(r3, r13, r19);
- Label no_such_interface, no_such_method;
-
+ // Get declaring interface class from method, and itable index
+ __ ldr(r0, Address(rmethod, Method::const_offset()));
+ __ ldr(r0, Address(r0, ConstMethod::constants_offset()));
+ __ ldr(r0, Address(r0, ConstantPool::pool_holder_offset_in_bytes()));
+ __ ldrw(rmethod, Address(rmethod, Method::itable_index_offset()));
+ __ subw(rmethod, rmethod, Method::itable_index_max);
+ __ negw(rmethod, rmethod);
+
__ lookup_interface_method(// inputs: rec. class, interface, itable index
r3, r0, rmethod,
// outputs: method, scan temp. reg
diff --git a/src/cpu/aarch64/vm/vtableStubs_aarch64.cpp b/src/cpu/aarch64/vm/vtableStubs_aarch64.cpp
--- a/src/cpu/aarch64/vm/vtableStubs_aarch64.cpp
+++ b/src/cpu/aarch64/vm/vtableStubs_aarch64.cpp
@@ -29,6 +29,7 @@
#include "code/vtableStubs.hpp"
#include "interp_masm_aarch64.hpp"
#include "memory/resourceArea.hpp"
+#include "oops/compiledICHolder.hpp"
#include "oops/instanceKlass.hpp"
#include "oops/klassVtable.hpp"
#include "runtime/sharedRuntime.hpp"
@@ -140,28 +141,44 @@
#endif
// Entry arguments:
- // rscratch2: Interface
+ // rscratch2: CompiledICHolder
// j_rarg0: Receiver
- // Free registers (non-args) are r0 (interface), rmethod
+ // Most registers are in use; we'll use r0, rmethod, r10, r11
+ const Register recv_klass_reg = r10;
+ const Register holder_klass_reg = r0; // declaring interface klass (DECC)
+ const Register resolved_klass_reg = rmethod; // resolved interface klass (REFC)
+ const Register temp_reg = r11;
+ const Register icholder_reg = rscratch2;
+
+ Label L_no_such_interface;
+
+ __ ldr(resolved_klass_reg, Address(icholder_reg, CompiledICHolder::holder_klass_offset()));
+ __ ldr(holder_klass_reg, Address(icholder_reg, CompiledICHolder::holder_metadata_offset()));
+
// get receiver (need to skip return address on top of stack)
-
assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0");
// get receiver klass (also an implicit null-check)
address npe_addr = __ pc();
-
- // Most registers are in use; we'll use r0, rmethod, r10, r11
- __ load_klass(r10, j_rarg0);
-
- Label throw_icce;
+ __ load_klass(recv_klass_reg, j_rarg0);
- // Get Method* and entrypoint for compiler
+ // Receiver subtype check against REFC.
+ // Destroys recv_klass_reg value.
+ __ lookup_interface_method(// inputs: rec. class, interface
+ recv_klass_reg, resolved_klass_reg, noreg,
+ // outputs: scan temp. reg1, scan temp. reg2
+ recv_klass_reg, temp_reg,
+ L_no_such_interface,
+ /*return_method=*/false);
+
+ // Get selected method from declaring class and itable index
+ __ load_klass(recv_klass_reg, j_rarg0); // restore recv_klass_reg
__ lookup_interface_method(// inputs: rec. class, interface, itable index
- r10, rscratch2, itable_index,
- // outputs: method, scan temp. reg
- rmethod, r11,
- throw_icce);
+ recv_klass_reg, holder_klass_reg, itable_index,
+ // outputs: method, scan temp. reg
+ rmethod, temp_reg,
+ L_no_such_interface);
// method (rmethod): Method*
// j_rarg0: receiver
@@ -183,7 +200,7 @@
__ ldr(rscratch1, Address(rmethod, Method::from_compiled_offset()));
__ br(rscratch1);
- __ bind(throw_icce);
+ __ bind(L_no_such_interface);
__ far_jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry()));
__ flush();
@@ -205,11 +222,11 @@
int size = DebugVtables ? 216 : 0;
if (CountCompiledCalls)
size += 6 * 4;
- // FIXME
+ // FIXME: vtable stubs only need 36 bytes
if (is_vtable_stub)
size += 52;
else
- size += 104;
+ size += 176;
return size;
// In order to tune these parameters, run the JVM with VM options
@@ -217,33 +234,58 @@
// actual itable stubs. Run it with -Xmx31G -XX:+UseCompressedOops.
//
// If Universe::narrow_klass_base is nonzero, decoding a compressed
- // class can take zeveral instructions. Run it with -Xmx31G
- // -XX:+UseCompressedOops.
+ // class can take zeveral instructions.
//
// The JVM98 app. _202_jess has a megamorphic interface call.
// The itable code looks like this:
- // Decoding VtableStub itbl[1]@12
- // ldr w10, [x1,#8]
- // lsl x10, x10, #3
- // ldr w11, [x10,#280]
- // add x11, x10, x11, uxtx #3
- // add x11, x11, #0x1b8
- // ldr x12, [x11]
- // cmp x9, x12
- // b.eq success
- // loop:
- // cbz x12, throw_icce
- // add x11, x11, #0x10
- // ldr x12, [x11]
- // cmp x9, x12
- // b.ne loop
- // success:
- // ldr x11, [x11,#8]
- // ldr x12, [x10,x11]
- // ldr x8, [x12,#72]
- // br x8
- // throw_icce:
- // b throw_ICCE_entry
+
+ // ldr xmethod, [xscratch2,#CompiledICHolder::holder_klass_offset]
+ // ldr x0, [xscratch2]
+ // ldr w10, [x1,#oopDesc::klass_offset_in_bytes]
+ // mov xheapbase, #0x3c000000 // #narrow_klass_base
+ // movk xheapbase, #0x3f7, lsl #32
+ // add x10, xheapbase, x10
+ // mov xheapbase, #0xe7ff0000 // #heapbase
+ // movk xheapbase, #0x3f7, lsl #32
+ // ldr w11, [x10,#vtable_length_offset]
+ // add x11, x10, x11, uxtx #3
+ // add x11, x11, #itableMethodEntry::method_offset_in_bytes
+ // ldr x10, [x11]
+ // cmp xmethod, x10
+ // b.eq found_method
+ // search:
+ // cbz x10, no_such_interface
+ // add x11, x11, #0x10
+ // ldr x10, [x11]
+ // cmp xmethod, x10
+ // b.ne search
+ // found_method:
+ // ldr w10, [x1,#oopDesc::klass_offset_in_bytes]
+ // mov xheapbase, #0x3c000000 // #narrow_klass_base
+ // movk xheapbase, #0x3f7, lsl #32
+ // add x10, xheapbase, x10
+ // mov xheapbase, #0xe7ff0000 // #heapbase
+ // movk xheapbase, #0x3f7, lsl #32
+ // ldr w11, [x10,#vtable_length_offset]
+ // add x11, x10, x11, uxtx #3
+ // add x11, x11, #itableMethodEntry::method_offset_in_bytes
+ // add x10, x10, #itentry_off
+ // ldr xmethod, [x11]
+ // cmp x0, xmethod
+ // b.eq found_method2
+ // search2:
+ // cbz xmethod, 0x000003ffa872e6cc
+ // add x11, x11, #0x10
+ // ldr xmethod, [x11]
+ // cmp x0, xmethod
+ // b.ne search2
+ // found_method2:
+ // ldr w11, [x11,#itableOffsetEntry::offset_offset_in_bytes]
+ // ldr xmethod, [x10,w11,uxtw]
+ // ldr xscratch1, [xmethod,#Method::from_compiled_offset]
+ // br xscratch1
+ // no_such_interface:
+ // b throw_ICCE_entry
}
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