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From 4aea44c0438e3b635b6bea94869fd92ce96713a9 Mon Sep 17 00:00:00 2001
Date: Wed, 29 Jun 2022 10:00:02 +0800
Subject: Apply TBI to ZGC of JDK17
---
src/hotspot/cpu/aarch64/aarch64.ad | 13 ++-
.../cpu/aarch64/c1_LIRAssembler_aarch64.cpp | 5 +
.../cpu/aarch64/c1_LIRAssembler_aarch64.hpp | 9 +-
.../cpu/aarch64/compiledIC_aarch64.cpp | 9 +-
.../gc/shared/barrierSetNMethod_aarch64.cpp | 80 ++++++++++----
.../gc/z/zBarrierSetAssembler_aarch64.cpp | 20 ++++
.../gc/z/zBarrierSetAssembler_aarch64.hpp | 2 +
.../cpu/aarch64/gc/z/zGlobals_aarch64.cpp | 102 ++++++++++++++++++
.../cpu/aarch64/gc/z/zGlobals_aarch64.hpp | 5 +
src/hotspot/cpu/aarch64/gc/z/z_aarch64.ad | 8 +-
.../cpu/aarch64/globalDefinitions_aarch64.hpp | 3 +
src/hotspot/cpu/aarch64/globals_aarch64.hpp | 5 +-
.../aarch64/jvmciCodeInstaller_aarch64.cpp | 16 ++-
.../cpu/aarch64/macroAssembler_aarch64.cpp | 40 +++++--
.../cpu/aarch64/nativeInst_aarch64.cpp | 31 +++++-
.../cpu/aarch64/nativeInst_aarch64.hpp | 16 ++-
.../cpu/aarch64/vm_version_aarch64.cpp | 28 +++++
src/hotspot/os/linux/gc/z/zNUMA_linux.cpp | 4 +
.../gc/z/zPhysicalMemoryBacking_linux.cpp | 61 ++++++++++-
src/hotspot/share/asm/codeBuffer.cpp | 3 +-
src/hotspot/share/code/relocInfo.hpp | 29 ++++-
src/hotspot/share/gc/z/vmStructs_z.cpp | 1 +
src/hotspot/share/gc/z/vmStructs_z.hpp | 3 +
src/hotspot/share/gc/z/zAddress.cpp | 6 ++
src/hotspot/share/gc/z/zAddress.hpp | 3 +
src/hotspot/share/gc/z/zAddress.inline.hpp | 30 ++++--
src/hotspot/share/gc/z/zBarrierSetNMethod.cpp | 7 ++
src/hotspot/share/gc/z/zGlobals.cpp | 1 +
src/hotspot/share/gc/z/zGlobals.hpp | 1 +
src/hotspot/share/gc/z/zMark.cpp | 7 ++
src/hotspot/share/gc/z/zMarkStackEntry.hpp | 3 +-
src/hotspot/share/gc/z/zNMethod.cpp | 65 ++++++++++-
src/hotspot/share/gc/z/zNMethod.hpp | 6 +-
src/hotspot/share/gc/z/zNMethodData.cpp | 12 +++
src/hotspot/share/gc/z/zNMethodData.hpp | 9 ++
src/hotspot/share/gc/z/zPhysicalMemory.cpp | 54 ++++++++++
src/hotspot/share/gc/z/zVirtualMemory.cpp | 15 +++
.../writers/jfrStreamWriterHost.inline.hpp | 3 +
src/hotspot/share/prims/jni.cpp | 6 ++
.../sun/jvm/hotspot/gc/z/ZAddress.java | 15 ++-
.../sun/jvm/hotspot/gc/z/ZCollectedHeap.java | 3 +
.../sun/jvm/hotspot/gc/z/ZGlobals.java | 4 +
.../hotspot/gc/z/ZGlobalsForVMStructs.java | 6 ++
.../classes/sun/jvm/hotspot/gc/z/ZUtils.java | 5 +
44 files changed, 685 insertions(+), 69 deletions(-)
diff --git a/src/hotspot/cpu/aarch64/aarch64.ad b/src/hotspot/cpu/aarch64/aarch64.ad
index 91ea50c00..b3d89863e 100644
--- a/src/hotspot/cpu/aarch64/aarch64.ad
+++ b/src/hotspot/cpu/aarch64/aarch64.ad
@@ -1750,7 +1750,11 @@ int MachCallStaticJavaNode::ret_addr_offset()
int MachCallDynamicJavaNode::ret_addr_offset()
{
- return 16; // movz, movk, movk, bl
+ if (!UseTBI) {
+ return 16; // movz, movk, movk, bl
+ } else {
+ return 20; // movz, movk, movk, movk, bl
+ }
}
int MachCallRuntimeNode::ret_addr_offset() {
@@ -1768,7 +1772,12 @@ int MachCallRuntimeNode::ret_addr_offset() {
if (cb) {
return 1 * NativeInstruction::instruction_size;
} else {
- return 6 * NativeInstruction::instruction_size;
+ // lea will emit 3 or an extra movk to make 4 instructions.
+ if (!UseTBI) {
+ return 6 * NativeInstruction::instruction_size;
+ } else {
+ return 7 * NativeInstruction::instruction_size;
+ }
}
}
diff --git a/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp b/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp
index 5ce3ecf9e..c69f8aaf1 100644
--- a/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp
@@ -94,6 +94,11 @@ static void select_different_registers(Register preserve,
assert_different_registers(preserve, tmp1, tmp2, tmp3);
}
+int LIR_Assembler::_call_stub_size = 13 * NativeInstruction::instruction_size;
+
+void LIR_Assembler::init_for_tbi() {
+ _call_stub_size = 15 * NativeInstruction::instruction_size;
+}
bool LIR_Assembler::is_small_constant(LIR_Opr opr) { Unimplemented(); return false; }
diff --git a/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.hpp b/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.hpp
index c31ad9b21..d39f57087 100644
--- a/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.hpp
+++ b/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.hpp
@@ -70,16 +70,19 @@ friend class ArrayCopyStub;
void deoptimize_trap(CodeEmitInfo *info);
+ // call stub: CompiledStaticCall::to_interp_stub_size() +
+ // CompiledStaticCall::to_trampoline_stub_size()
+ static int _call_stub_size;
+
enum {
- // call stub: CompiledStaticCall::to_interp_stub_size() +
- // CompiledStaticCall::to_trampoline_stub_size()
- _call_stub_size = 13 * NativeInstruction::instruction_size,
_exception_handler_size = DEBUG_ONLY(1*K) NOT_DEBUG(175),
_deopt_handler_size = 7 * NativeInstruction::instruction_size
};
public:
+ static void init_for_tbi();
+
void store_parameter(Register r, int offset_from_esp_in_words);
void store_parameter(jint c, int offset_from_esp_in_words);
void store_parameter(jobject c, int offset_from_esp_in_words);
diff --git a/src/hotspot/cpu/aarch64/compiledIC_aarch64.cpp b/src/hotspot/cpu/aarch64/compiledIC_aarch64.cpp
index e922fc1cd..c6a9d8387 100644
--- a/src/hotspot/cpu/aarch64/compiledIC_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/compiledIC_aarch64.cpp
@@ -71,8 +71,13 @@ address CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf, address mark)
#undef __
int CompiledStaticCall::to_interp_stub_size() {
- // isb; movk; movz; movz; movk; movz; movz; br
- return 8 * NativeInstruction::instruction_size;
+ if (!UseTBI) {
+ // isb; movk; movz; movz; movk; movz; movz; br
+ return 8 * NativeInstruction::instruction_size;
+ } else {
+ // emit_to_interp_stub will emit 2 extra movk instructions.
+ return 10 * NativeInstruction::instruction_size;
+ }
}
int CompiledStaticCall::to_trampoline_stub_size() {
diff --git a/src/hotspot/cpu/aarch64/gc/shared/barrierSetNMethod_aarch64.cpp b/src/hotspot/cpu/aarch64/gc/shared/barrierSetNMethod_aarch64.cpp
index 8598fb7e7..4942dca93 100644
--- a/src/hotspot/cpu/aarch64/gc/shared/barrierSetNMethod_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/gc/shared/barrierSetNMethod_aarch64.cpp
@@ -34,25 +34,6 @@
#include "utilities/align.hpp"
#include "utilities/debug.hpp"
-class NativeNMethodBarrier: public NativeInstruction {
- address instruction_address() const { return addr_at(0); }
-
- int *guard_addr() {
- return reinterpret_cast<int*>(instruction_address() + 10 * 4);
- }
-
-public:
- int get_value() {
- return Atomic::load_acquire(guard_addr());
- }
-
- void set_value(int value) {
- Atomic::release_store(guard_addr(), value);
- }
-
- void verify() const;
-};
-
// Store the instruction bitmask, bits and name for checking the barrier.
struct CheckInsn {
uint32_t mask;
@@ -60,7 +41,20 @@ struct CheckInsn {
const char *name;
};
-static const struct CheckInsn barrierInsn[] = {
+static const struct CheckInsn barrierInsn48[] = {
+ { 0xff000000, 0x18000000, "ldr (literal)" },
+ { 0xfffff0ff, 0xd50330bf, "dmb" },
+ { 0xffc00000, 0xb9400000, "ldr"},
+ { 0x7f20001f, 0x6b00001f, "cmp"},
+ { 0xff00001f, 0x54000000, "b.eq"},
+ { 0xff800000, 0xd2800000, "mov"},
+ { 0xff800000, 0xf2800000, "movk"},
+ { 0xff800000, 0xf2800000, "movk"},
+ { 0xfffffc1f, 0xd63f0000, "blr"},
+ { 0xfc000000, 0x14000000, "b"}
+};
+
+static const struct CheckInsn barrierInsn64[] = {
{ 0xff000000, 0x18000000, "ldr (literal)" },
{ 0xfffff0ff, 0xd50330bf, "dmb" },
{ 0xffc00000, 0xb9400000, "ldr"},
@@ -69,16 +63,52 @@ static const struct CheckInsn barrierInsn[] = {
{ 0xff800000, 0xd2800000, "mov"},
{ 0xff800000, 0xf2800000, "movk"},
{ 0xff800000, 0xf2800000, "movk"},
+ { 0xff800000, 0xf2800000, "movk"},
{ 0xfffffc1f, 0xd63f0000, "blr"},
{ 0xfc000000, 0x14000000, "b"}
};
+static const unsigned int barrier_inst_len48 = sizeof(barrierInsn48) / sizeof(struct CheckInsn);
+static const unsigned int barrier_inst_len64 = sizeof(barrierInsn64) / sizeof(struct CheckInsn);
+
+static int get_entry_barrier_size() {
+ return UseTBI ? (4 * (int)barrier_inst_len64) : (4 * (int)barrier_inst_len48);
+}
+
+class NativeNMethodBarrier: public NativeInstruction {
+ address instruction_address() const { return addr_at(0); }
+
+ int *guard_addr() {
+ return reinterpret_cast<int*>(instruction_address() + get_entry_barrier_size());
+ }
+
+public:
+ int get_value() {
+ return Atomic::load_acquire(guard_addr());
+ }
+
+ void set_value(int value) {
+ Atomic::release_store(guard_addr(), value);
+ }
+
+ void verify() const;
+};
+
// The encodings must match the instructions emitted by
// BarrierSetAssembler::nmethod_entry_barrier. The matching ignores the specific
// register numbers and immediate values in the encoding.
void NativeNMethodBarrier::verify() const {
+ const CheckInsn *barrierInsn;
+ unsigned int barrier_inst_len;
+ if (UseTBI) {
+ barrierInsn = barrierInsn64;
+ barrier_inst_len = barrier_inst_len64;
+ } else {
+ barrierInsn = barrierInsn48;
+ barrier_inst_len = barrier_inst_len48;
+ }
intptr_t addr = (intptr_t) instruction_address();
- for(unsigned int i = 0; i < sizeof(barrierInsn)/sizeof(struct CheckInsn); i++ ) {
+ for(unsigned int i = 0; i < barrier_inst_len; i++) {
uint32_t inst = *((uint32_t*) addr);
if ((inst & barrierInsn[i].mask) != barrierInsn[i].bits) {
tty->print_cr("Addr: " INTPTR_FORMAT " Code: 0x%x", addr, inst);
@@ -132,10 +162,14 @@ void BarrierSetNMethod::deoptimize(nmethod* nm, address* return_address_ptr) {
// not find the expected native instruction at this offset, which needs updating.
// Note that this offset is invariant of PreserveFramePointer.
-static const int entry_barrier_offset = -4 * 11;
+// offset = entry barrier insns (10 or 11, depending on UseTBI) + int32 (guard value)
+// @see BarrierSetAssembler::nmethod_entry_barrier
+static int entry_barrier_offset() {
+ return -(get_entry_barrier_size() + 4);
+}
static NativeNMethodBarrier* native_nmethod_barrier(nmethod* nm) {
- address barrier_address = nm->code_begin() + nm->frame_complete_offset() + entry_barrier_offset;
+ address barrier_address = nm->code_begin() + nm->frame_complete_offset() + entry_barrier_offset();
NativeNMethodBarrier* barrier = reinterpret_cast<NativeNMethodBarrier*>(barrier_address);
debug_only(barrier->verify());
return barrier;
diff --git a/src/hotspot/cpu/aarch64/gc/z/zBarrierSetAssembler_aarch64.cpp b/src/hotspot/cpu/aarch64/gc/z/zBarrierSetAssembler_aarch64.cpp
index 6b42982ed..cafd4e58f 100644
--- a/src/hotspot/cpu/aarch64/gc/z/zBarrierSetAssembler_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/gc/z/zBarrierSetAssembler_aarch64.cpp
@@ -203,6 +203,26 @@ void ZBarrierSetAssembler::try_resolve_jobject_in_native(MacroAssembler* masm,
BLOCK_COMMENT("} ZBarrierSetAssembler::try_resolve_jobject_in_native");
}
+static void change_immediate(uint32_t& instr, uint32_t imm, uint32_t start, uint32_t end) {
+ uint32_t imm_mask = ((1u << start) - 1u) ^ ((1u << (end + 1)) - 1u);
+ instr &= ~imm_mask;
+ instr |= imm << start;
+}
+
+void ZBarrierSetAssembler::patch_barrier_relocation(address addr) {
+ uint32_t* const patch_addr = (uint32_t*)addr;
+
+ // The next 3 insns should be movz, andr, cbnz.
+ assert(nativeInstruction_at(addr)->is_movz() &&
+ Instruction_aarch64::extract(*(patch_addr + 1), 30, 24) == 0b0001010 &&
+ Instruction_aarch64::extract(*(patch_addr + 2), 31, 24) == 0b10110101,
+ "wrong insns in barrier patch");
+
+ change_immediate(*patch_addr, (uint16_t) (ZAddressBadMask >> 48), 5, 20);
+ OrderAccess::fence();
+ ICache::invalidate_word((address)patch_addr);
+}
+
#ifdef COMPILER1
#undef __
diff --git a/src/hotspot/cpu/aarch64/gc/z/zBarrierSetAssembler_aarch64.hpp b/src/hotspot/cpu/aarch64/gc/z/zBarrierSetAssembler_aarch64.hpp
index cca873825..1594ffe64 100644
--- a/src/hotspot/cpu/aarch64/gc/z/zBarrierSetAssembler_aarch64.hpp
+++ b/src/hotspot/cpu/aarch64/gc/z/zBarrierSetAssembler_aarch64.hpp
@@ -77,6 +77,8 @@ public:
Register tmp,
Label& slowpath);
+ void patch_barrier_relocation(address addr);
+
#ifdef COMPILER1
void generate_c1_load_barrier_test(LIR_Assembler* ce,
LIR_Opr ref) const;
diff --git a/src/hotspot/cpu/aarch64/gc/z/zGlobals_aarch64.cpp b/src/hotspot/cpu/aarch64/gc/z/zGlobals_aarch64.cpp
index 6aa6d41fe..031014511 100644
--- a/src/hotspot/cpu/aarch64/gc/z/zGlobals_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/gc/z/zGlobals_aarch64.cpp
@@ -34,6 +34,7 @@
#include <sys/mman.h>
#endif // LINUX
+// Address layout when using multi-mapping
//
// The heap can have three different layouts, depending on the max heap size.
//
@@ -142,6 +143,97 @@
// * 63-48 Fixed (16-bits, always zero)
//
+// Address layout when using TBI (Top Byte Ignore)
+//
+// The heap can have three different layouts, depending on the max heap size.
+//
+// Address Space & Pointer Layout 1
+// --------------------------------
+//
+// +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
+// . .
+// . .
+// . .
+// +--------------------------------+ 0x0000080000000000 (8TB)
+// | Heap |
+// +--------------------------------+ 0x0000040000000000 (4TB)
+// . .
+// +--------------------------------+ 0x0000000000000000
+//
+// 6 5 5 4 4
+// 2 9 8 2 1 0
+// ++----+-------------------+-----------------------------------------------+
+// 0|1111|000 00000000 000000|11 11111111 11111111 11111111 11111111 11111111|
+// ++----+-------------------+-----------------------------------------------+
+// | | |
+// | | * 41-0 Object Offset (42-bits, 4TB address space)
+// | |
+// | * 58-42 Fixed (18-bits, always zero)
+// |
+// * 62-59 Metadata Bits (4-bits) 0001 = Marked0
+// 0010 = Marked1
+// 0100 = Remapped
+// 1000 = Finalizable
+//
+//
+// Address Space & Pointer Layout 2
+// --------------------------------
+//
+// +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
+// . .
+// . .
+// . .
+// +--------------------------------+ 0x0000100000000000 (16TB)
+// | Heap |
+// +--------------------------------+ 0x0000080000000000 (8TB)
+// . .
+// +--------------------------------+ 0x0000000000000000
+//
+// 6 5 5 4 4
+// 2 9 8 3 2 0
+// ++----+------------------+------------------------------------------------+
+// 0|1111|000 00000000 00000|111 11111111 11111111 11111111 11111111 11111111|
+// ++----+------------------+------------------------------------------------+
+// | | |
+// | | * 42-0 Object Offset (43-bits, 8TB address space)
+// | |
+// | * 58-43 Fixed (17-bits, always zero)
+// |
+// * 62-59 Metadata Bits (4-bits) 0001 = Marked0
+// 0010 = Marked1
+// 0100 = Remapped
+// 1000 = Finalizable
+//
+//
+// Address Space & Pointer Layout 3
+// --------------------------------
+//
+// +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
+// . .
+// . .
+// . .
+// +--------------------------------+ 0x0000200000000000 (32TB)
+// | Heap |
+// +--------------------------------+ 0x0000100000000000 (16TB)
+// . .
+// +--------------------------------+ 0x0000000000000000
+//
+// 6 5 5 4 4
+// 2 9 8 4 3 0
+// ++----+-----------------+-------------------------------------------------+
+// 0|1111|000 00000000 0000|1111 11111111 11111111 11111111 11111111 11111111|
+// ++----+-----------------+-------------------------------------------------+
+// | | |
+// | | * 43-0 Object Offset (44-bits, 16TB address space)
+// | |
+// | * 58-44 Fixed (17-bits, always zero)
+// |
+// * 62-59 Metadata Bits (4-bits) 0001 = Marked0
+// 0010 = Marked1
+// 0100 = Remapped
+// 1000 = Finalizable
+//
+
// Default value if probing is not implemented for a certain platform: 128TB
static const size_t DEFAULT_MAX_ADDRESS_BIT = 47;
// Minimum value returned, if probing fails: 64GB
@@ -196,6 +288,13 @@ static size_t probe_valid_max_address_bit() {
#endif // LINUX
}
+uintptr_t ZPlatformAddressBase() {
+ if (UseTBI) {
+ return (uintptr_t)1 << ZPlatformAddressOffsetBits();
+ }
+ return 0;
+}
+
size_t ZPlatformAddressOffsetBits() {
const static size_t valid_max_address_offset_bits = probe_valid_max_address_bit() + 1;
const size_t max_address_offset_bits = valid_max_address_offset_bits - 3;
@@ -206,5 +305,8 @@ size_t ZPlatformAddressOffsetBits() {
}
size_t ZPlatformAddressMetadataShift() {
+ if (UseTBI) {
+ return ZPlatformAddressMetadataShiftForTbi;
+ }
return ZPlatformAddressOffsetBits();
}
diff --git a/src/hotspot/cpu/aarch64/gc/z/zGlobals_aarch64.hpp b/src/hotspot/cpu/aarch64/gc/z/zGlobals_aarch64.hpp
index 3187808b6..264b51ec1 100644
--- a/src/hotspot/cpu/aarch64/gc/z/zGlobals_aarch64.hpp
+++ b/src/hotspot/cpu/aarch64/gc/z/zGlobals_aarch64.hpp
@@ -28,6 +28,11 @@ const size_t ZPlatformGranuleSizeShift = 21; // 2MB
const size_t ZPlatformHeapViews = 3;
const size_t ZPlatformCacheLineSize = 64;
+// The highest bit (bit 63) of the address is occupied by StackWatermarkState (see StackWatermarkState::create).
+// So here we use bits 59~62 as the metadata bits of ZGC.
+const size_t ZPlatformAddressMetadataShiftForTbi = 59;
+
+uintptr_t ZPlatformAddressBase();
size_t ZPlatformAddressOffsetBits();
size_t ZPlatformAddressMetadataShift();
diff --git a/src/hotspot/cpu/aarch64/gc/z/z_aarch64.ad b/src/hotspot/cpu/aarch64/gc/z/z_aarch64.ad
index bd1c2cc9f..426a1cc2a 100644
--- a/src/hotspot/cpu/aarch64/gc/z/z_aarch64.ad
+++ b/src/hotspot/cpu/aarch64/gc/z/z_aarch64.ad
@@ -26,6 +26,7 @@ source_hpp %{
#include "gc/shared/gc_globals.hpp"
#include "gc/z/c2/zBarrierSetC2.hpp"
#include "gc/z/zThreadLocalData.hpp"
+#include "gc/z/zBarrierSetAssembler.hpp"
%}
@@ -36,7 +37,12 @@ static void z_load_barrier(MacroAssembler& _masm, const MachNode* node, Address
return;
}
ZLoadBarrierStubC2* const stub = ZLoadBarrierStubC2::create(node, ref_addr, ref, tmp, barrier_data);
- __ ldr(tmp, Address(rthread, ZThreadLocalData::address_bad_mask_offset()));
+ if (UseTBI) {
+ __ relocate(barrier_Relocation::spec());
+ __ movz(tmp, barrier_Relocation::unpatched, 48);
+ } else {
+ __ ldr(tmp, Address(rthread, ZThreadLocalData::address_bad_mask_offset()));
+ }
__ andr(tmp, tmp, ref);
__ cbnz(tmp, *stub->entry());
__ bind(*stub->continuation());
diff --git a/src/hotspot/cpu/aarch64/globalDefinitions_aarch64.hpp b/src/hotspot/cpu/aarch64/globalDefinitions_aarch64.hpp
index 3c779bb11..4a2af011f 100644
--- a/src/hotspot/cpu/aarch64/globalDefinitions_aarch64.hpp
+++ b/src/hotspot/cpu/aarch64/globalDefinitions_aarch64.hpp
@@ -67,4 +67,7 @@ const bool CCallingConventionRequiresIntsAsLongs = false;
#define NOT_R18_RESERVED(code) code
#endif
+#define CLEAR_TOP_BYTE(addr) ((addr) & ((1UL << 56) - 1))
+#define CLEAR_COLOR_BITS(addr) (UseTBI ? CLEAR_TOP_BYTE(addr) : (addr))
+
#endif // CPU_AARCH64_GLOBALDEFINITIONS_AARCH64_HPP
diff --git a/src/hotspot/cpu/aarch64/globals_aarch64.hpp b/src/hotspot/cpu/aarch64/globals_aarch64.hpp
index fefc2e5c3..cae9fb60c 100644
--- a/src/hotspot/cpu/aarch64/globals_aarch64.hpp
+++ b/src/hotspot/cpu/aarch64/globals_aarch64.hpp
@@ -119,7 +119,10 @@ define_pd_global(intx, InlineSmallCode, 1000);
product(uint, OnSpinWaitInstCount, 1, DIAGNOSTIC, \
"The number of OnSpinWaitInst instructions to generate." \
"It cannot be used with OnSpinWaitInst=none.") \
- range(1, 99)
+ range(1, 99) \
+ product(bool, UseTBI, false, EXPERIMENTAL, \
+ "Use the \"Top Byte Ignore\" feature for ZGC." \
+ "And use 64 bit literal addresses instead of 48 bit.")
// end of ARCH_FLAGS
diff --git a/src/hotspot/cpu/aarch64/jvmciCodeInstaller_aarch64.cpp b/src/hotspot/cpu/aarch64/jvmciCodeInstaller_aarch64.cpp
index 17b978012..b52b3f2b3 100644
--- a/src/hotspot/cpu/aarch64/jvmciCodeInstaller_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/jvmciCodeInstaller_aarch64.cpp
@@ -57,9 +57,19 @@ void CodeInstaller::pd_patch_OopConstant(int pc_offset, JVMCIObject constant, JV
assert(Instruction_aarch64::extract(insn->encoding(), 31, 21) == 0b11010010101 &&
nativeInstruction_at(pc+4)->is_movk(), "wrong insn in patch");
} else {
- // Move wide constant: movz n, movk, movk.
- assert(nativeInstruction_at(pc+4)->is_movk()
- && nativeInstruction_at(pc+8)->is_movk(), "wrong insn in patch");
+ if (!UseTBI) {
+ // Move wide constant: movz n, movk, movk.
+ assert(nativeInstruction_at(pc+4)->is_movk()
+ && nativeInstruction_at(pc+8)->is_movk(), "wrong insn in patch");
+ } else {
+ // Move wide constant: movz n, movk, movk, movk.
+ // JVMCI would require code generated for it to use 64 bit literals and
+ // it therefore disables UseTBI until support is enabled.
+ // @see src/hotspot/cpu/aarch64/vm_version_aarch64.cpp - VM_Version::initialize()
+ assert(nativeInstruction_at(pc+4)->is_movk()
+ && nativeInstruction_at(pc+8)->is_movk()
+ && nativeInstruction_at(pc+12)->is_movk(), "wrong insn in patch");
+ }
}
}
#endif // ASSERT
diff --git a/src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp b/src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp
index 676a548d0..d89d655af 100644
--- a/src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp
@@ -176,9 +176,10 @@ int MacroAssembler::patch_oop(address insn_addr, address o) {
unsigned insn = *(unsigned*)insn_addr;
assert(nativeInstruction_at(insn_addr+4)->is_movk(), "wrong insns in patch");
- // OOPs are either narrow (32 bits) or wide (48 bits). We encode
+ // OOPs are either narrow (32 bits) or wide (48 or 64 bits). We encode
// narrow OOPs by setting the upper 16 bits in the first
// instruction.
+ // 64 bit addresses are only enabled with UseTBI set.
if (Instruction_aarch64::extract(insn, 31, 21) == 0b11010010101) {
// Move narrow OOP
uint32_t n = CompressedOops::narrow_oop_value(cast_to_oop(o));
@@ -193,6 +194,12 @@ int MacroAssembler::patch_oop(address insn_addr, address o) {
Instruction_aarch64::patch(insn_addr+4, 20, 5, (dest >>= 16) & 0xffff);
Instruction_aarch64::patch(insn_addr+8, 20, 5, (dest >>= 16) & 0xffff);
instructions = 3;
+
+ if (UseTBI) {
+ assert(nativeInstruction_at(insn_addr+12)->is_movk(), "wrong insns in patch");
+ Instruction_aarch64::patch(insn_addr+12, 20, 5, (dest >>= 16) & 0xffff);
+ instructions = 4;
+ }
}
return instructions * NativeInstruction::instruction_size;
}
@@ -279,12 +286,18 @@ address MacroAssembler::target_addr_for_insn(address insn_addr, unsigned insn) {
}
} else if (Instruction_aarch64::extract(insn, 31, 23) == 0b110100101) {
uint32_t *insns = (uint32_t *)insn_addr;
- // Move wide constant: movz, movk, movk. See movptr().
- assert(nativeInstruction_at(insns+1)->is_movk(), "wrong insns in patch");
- assert(nativeInstruction_at(insns+2)->is_movk(), "wrong insns in patch");
- return address(uint64_t(Instruction_aarch64::extract(insns[0], 20, 5))
+ // Move wide constant: movz, movk, movk [, movk]. See movptr().
+ assert(nativeInstruction_at(insns+1)->is_movk(), "wrong insns in patch - 2nd movk missing");
+ assert(nativeInstruction_at(insns+2)->is_movk(), "wrong insns in patch - 3rd movk missing");
+ uint64_t addr = uint64_t(Instruction_aarch64::extract(insns[0], 20, 5))
+ (uint64_t(Instruction_aarch64::extract(insns[1], 20, 5)) << 16)
- + (uint64_t(Instruction_aarch64::extract(insns[2], 20, 5)) << 32));
+ + (uint64_t(Instruction_aarch64::extract(insns[2], 20, 5)) << 32);
+ // Allow for getting the target address of a possible adddress.
+ if (UseTBI) {
+ assert(nativeInstruction_at(insns+3)->is_movk(), "wrong insns in patch - 4th movk missing.");
+ addr += uint64_t(Instruction_aarch64::extract(insns[3], 20, 5)) << 48;
+ }
+ return address(addr);
} else if (Instruction_aarch64::extract(insn, 31, 22) == 0b1011100101 &&
Instruction_aarch64::extract(insn, 4, 0) == 0b11111) {
return 0;
@@ -1505,10 +1518,9 @@ void MacroAssembler::mov(Register r, Address dest) {
movptr(r, imm64);
}
-// Move a constant pointer into r. In AArch64 mode the virtual
-// address space is 48 bits in size, so we only need three
-// instructions to create a patchable instruction sequence that can
-// reach anywhere.
+// Move a constant pointer into r. In AArch64 mode the virtual address space
+// is 48 bits in size or 52 bits. We need three or four instructions to create
+// a patchable instruction sequence that can reach anywhere.
void MacroAssembler::movptr(Register r, uintptr_t imm64) {
#ifndef PRODUCT
{
@@ -1517,12 +1529,18 @@ void MacroAssembler::movptr(Register r, uintptr_t imm64) {
block_comment(buffer);
}
#endif
- assert(imm64 < (1ull << 48), "48-bit overflow in address constant");
+ if (!UseTBI) {
+ assert(imm64 < (1ull << 48), "48-bit overflow in address constant");
+ }
movz(r, imm64 & 0xffff);
imm64 >>= 16;
movk(r, imm64 & 0xffff, 16);
imm64 >>= 16;
movk(r, imm64 & 0xffff, 32);
+ if (UseTBI) {
+ imm64 >>= 16;
+ movk(r, imm64 & 0xffff, 48);
+ }
}
// Macro to mov replicated immediate to vector register.
diff --git a/src/hotspot/cpu/aarch64/nativeInst_aarch64.cpp b/src/hotspot/cpu/aarch64/nativeInst_aarch64.cpp
index d808e4b5b..117686f8c 100644
--- a/src/hotspot/cpu/aarch64/nativeInst_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/nativeInst_aarch64.cpp
@@ -234,6 +234,14 @@ void NativeCall::insert(address code_pos, address entry) { Unimplemented(); }
//-------------------------------------------------------------------
+// movz, movk, movk.
+int NativeMovConstReg::instruction_size = 3 * NativeInstruction::instruction_size;
+
+void NativeMovConstReg::init_for_tbi() {
+ // movz, movk, movk, movk.
+ instruction_size = 4 * NativeInstruction::instruction_size;
+}
+
void NativeMovConstReg::verify() {
if (! (nativeInstruction_at(instruction_address())->is_movz() ||
is_adrp_at(instruction_address()) ||
@@ -439,8 +447,17 @@ bool NativeInstruction::is_general_jump() {
NativeInstruction* inst2 = nativeInstruction_at(addr_at(instruction_size * 2));
if (inst2->is_movk()) {
NativeInstruction* inst3 = nativeInstruction_at(addr_at(instruction_size * 3));
- if (inst3->is_blr()) {
- return true;
+ if (!UseTBI) {
+ if (inst3->is_blr()) {
+ return true;
+ }
+ } else {
+ if(inst3->is_movk()) {
+ NativeInstruction* inst4 = nativeInstruction_at(addr_at(instruction_size * 4));
+ if (inst4->is_blr()) {
+ return true;
+ }
+ }
}
}
}
@@ -496,6 +513,16 @@ void NativeJump::patch_verified_entry(address entry, address verified_entry, add
ICache::invalidate_range(verified_entry, instruction_size);
}
+// movz, movk, movk, br.
+int NativeGeneralJump::instruction_size = 4 * NativeInstruction::instruction_size;
+int NativeGeneralJump::next_instruction_offset = 4 * NativeInstruction::instruction_size;
+
+void NativeGeneralJump::init_for_tbi() {
+ // movz, movk, movk, movk, br.
+ instruction_size = 5 * NativeInstruction::instruction_size;
+ next_instruction_offset = 5 * NativeInstruction::instruction_size;
+}
+
void NativeGeneralJump::verify() { }
void NativeGeneralJump::insert_unconditional(address code_pos, address entry) {
diff --git a/src/hotspot/cpu/aarch64/nativeInst_aarch64.hpp b/src/hotspot/cpu/aarch64/nativeInst_aarch64.hpp
index 75f2797c3..2460c02a1 100644
--- a/src/hotspot/cpu/aarch64/nativeInst_aarch64.hpp
+++ b/src/hotspot/cpu/aarch64/nativeInst_aarch64.hpp
@@ -271,16 +271,19 @@ inline NativeCall* nativeCall_before(address return_address) {
class NativeMovConstReg: public NativeInstruction {
public:
enum Aarch64_specific_constants {
- instruction_size = 3 * 4, // movz, movk, movk. See movptr().
instruction_offset = 0,
displacement_offset = 0,
};
+ static int instruction_size;
+
+ static void init_for_tbi();
+
address instruction_address() const { return addr_at(instruction_offset); }
address next_instruction_address() const {
if (nativeInstruction_at(instruction_address())->is_movz())
- // Assume movz, movk, movk
+ // Assume movz, movk, movk [, movk].
return addr_at(instruction_size);
else if (is_adrp_at(instruction_address()))
return addr_at(2*4);
@@ -469,12 +472,15 @@ inline NativeJump* nativeJump_at(address address) {
class NativeGeneralJump: public NativeJump {
public:
enum AArch64_specific_constants {
- instruction_size = 4 * 4,
instruction_offset = 0,
- data_offset = 0,
- next_instruction_offset = 4 * 4
+ data_offset = 0
};
+ static int instruction_size;
+ static int next_instruction_offset;
+
+ static void init_for_tbi();
+
address jump_destination() const;
void set_jump_destination(address dest);
diff --git a/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp b/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
index 31dfb7727..bcd064cfe 100644
--- a/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
@@ -31,6 +31,10 @@
#include "runtime/vm_version.hpp"
#include "utilities/formatBuffer.hpp"
#include "utilities/macros.hpp"
+#include "code/nativeInst.hpp"
+#ifdef COMPILER1
+#include "c1/c1_LIRAssembler.hpp"
+#endif // COMPILER1
#include OS_HEADER_INLINE(os)
@@ -66,6 +70,16 @@ static SpinWait get_spin_wait_desc() {
return SpinWait{};
}
+// Configure instruction sizes for nativeInst_aarch64 and c1_LIRAssembler_aarch64
+// based on flag UseTBI.
+static void init_instruction_sizes_for_tbi() {
+ NativeMovConstReg::init_for_tbi();
+ NativeGeneralJump::init_for_tbi();
+#ifdef COMPILER1
+ LIR_Assembler::init_for_tbi();
+#endif // COMPILER1
+}
+
void VM_Version::initialize() {
_supports_cx8 = true;
_supports_atomic_getset4 = true;
@@ -415,6 +429,20 @@ void VM_Version::initialize() {
UsePopCountInstruction = true;
}
+#if INCLUDE_JVMCI && defined(AARCH64)
+ if (UseTBI && EnableJVMCI) {
+ warning("64-bit Literal Addresses disabled due to EnableJVMCI.");
+ UseTBI = false;
+ }
+#endif
+ if (UseTBI && !UseZGC) {
+ warning("UseTBI only works when UseZGC is on.");
+ UseTBI = false;
+ }
+ if (UseTBI) {
+ init_instruction_sizes_for_tbi();
+ }
+
#ifdef COMPILER2
if (FLAG_IS_DEFAULT(UseMultiplyToLenIntrinsic)) {
UseMultiplyToLenIntrinsic = true;
diff --git a/src/hotspot/os/linux/gc/z/zNUMA_linux.cpp b/src/hotspot/os/linux/gc/z/zNUMA_linux.cpp
index cfe25549f..cefe5d03d 100644
--- a/src/hotspot/os/linux/gc/z/zNUMA_linux.cpp
+++ b/src/hotspot/os/linux/gc/z/zNUMA_linux.cpp
@@ -59,6 +59,10 @@ uint32_t ZNUMA::memory_id(uintptr_t addr) {
uint32_t id = (uint32_t)-1;
+#ifdef AARCH64
+ addr = CLEAR_COLOR_BITS(addr);
+#endif
+
if (ZSyscall::get_mempolicy((int*)&id, NULL, 0, (void*)addr, MPOL_F_NODE | MPOL_F_ADDR) == -1) {
ZErrno err;
fatal("Failed to get NUMA id for memory at " PTR_FORMAT " (%s)", addr, err.to_string());
diff --git a/src/hotspot/os/linux/gc/z/zPhysicalMemoryBacking_linux.cpp b/src/hotspot/os/linux/gc/z/zPhysicalMemoryBacking_linux.cpp
index 7a1130554..d0ffe93ce 100644
--- a/src/hotspot/os/linux/gc/z/zPhysicalMemoryBacking_linux.cpp
+++ b/src/hotspot/os/linux/gc/z/zPhysicalMemoryBacking_linux.cpp
@@ -120,6 +120,14 @@ ZPhysicalMemoryBacking::ZPhysicalMemoryBacking(size_t max_capacity) :
_available(0),
_initialized(false) {
+#ifdef AARCH64
+ if (UseTBI) {
+ // Successfully initialized
+ _initialized = true;
+ return;
+ }
+#endif // AARCH64
+
// Create backing file
_fd = create_fd(ZFILENAME_HEAP);
if (_fd == -1) {
@@ -350,7 +358,12 @@ void ZPhysicalMemoryBacking::warn_max_map_count(size_t max_capacity) const {
// However, ZGC tends to create the most mappings and dominate the total count.
// In the worst cases, ZGC will map each granule three times, i.e. once per heap view.
// We speculate that we need another 20% to allow for non-ZGC subsystems to map memory.
- const size_t required_max_map_count = (max_capacity / ZGranuleSize) * 3 * 1.2;
+#ifdef AARCH64
+ const size_t required_max_map_multiple = UseTBI ? 1 : 3;
+#else
+ const size_t required_max_map_multiple = 3;
+#endif // AARCH64
+ const size_t required_max_map_count = (max_capacity / ZGranuleSize) * required_max_map_multiple * 1.2;
if (actual_max_map_count < required_max_map_count) {
log_warning_p(gc)("***** WARNING! INCORRECT SYSTEM CONFIGURATION DETECTED! *****");
log_warning_p(gc)("The system limit on number of memory mappings per process might be too low for the given");
@@ -363,6 +376,13 @@ void ZPhysicalMemoryBacking::warn_max_map_count(size_t max_capacity) const {
}
void ZPhysicalMemoryBacking::warn_commit_limits(size_t max_capacity) const {
+#ifdef AARCH64
+ if (UseTBI) {
+ // Warn if max map count is too low
+ warn_max_map_count(max_capacity);
+ return;
+ }
+#endif // AARCH64
// Warn if available space is too low
warn_available_space(max_capacity);
@@ -681,6 +701,13 @@ size_t ZPhysicalMemoryBacking::commit_default(size_t offset, size_t length) cons
}
size_t ZPhysicalMemoryBacking::commit(size_t offset, size_t length) const {
+#ifdef AARCH64
+ if (UseTBI) {
+ // do nothing
+ return length;
+ }
+#endif // AARCH64
+
if (ZNUMA::is_enabled() && !ZLargePages::is_explicit()) {
// To get granule-level NUMA interleaving when using non-large pages,
// we must explicitly interleave the memory at commit/fallocate time.
@@ -693,6 +720,12 @@ size_t ZPhysicalMemoryBacking::commit(size_t offset, size_t length) const {
size_t ZPhysicalMemoryBacking::uncommit(size_t offset, size_t length) const {
log_trace(gc, heap)("Uncommitting memory: " SIZE_FORMAT "M-" SIZE_FORMAT "M (" SIZE_FORMAT "M)",
offset / M, (offset + length) / M, length / M);
+#ifdef AARCH64
+ if (UseTBI) {
+ // Not yet supported.
+ return length;
+ }
+#endif // AARCH64
const ZErrno err = fallocate(true /* punch_hole */, offset, length);
if (err) {
@@ -704,6 +737,29 @@ size_t ZPhysicalMemoryBacking::uncommit(size_t offset, size_t length) const {
}
void ZPhysicalMemoryBacking::map(uintptr_t addr, size_t size, uintptr_t offset) const {
+#ifdef AARCH64
+ if (UseTBI) {
+ int flags = MAP_FIXED | MAP_ANONYMOUS | MAP_PRIVATE;
+ if (ZLargePages::is_explicit()) {
+ flags |= MAP_HUGETLB;
+ }
+ const void* const res = mmap((void*) CLEAR_TOP_BYTE(addr), size, PROT_READ | PROT_WRITE, flags, 0, 0);
+ if (res == MAP_FAILED) {
+ ZErrno err;
+ fatal("Failed to map memory (%s)", err.to_string());
+ }
+
+ // Advise on use of transparent huge pages before touching it
+ if (ZLargePages::is_transparent()) {
+ if (madvise((void*) CLEAR_TOP_BYTE(addr), size, MADV_HUGEPAGE) == -1) {
+ ZErrno err;
+ log_error(gc)("Failed to advise use of transparent huge pages (%s)", err.to_string());
+ }
+ }
+ return;
+ }
+#endif // AARCH64
+
const void* const res = mmap((void*)addr, size, PROT_READ|PROT_WRITE, MAP_FIXED|MAP_SHARED, _fd, offset);
if (res == MAP_FAILED) {
ZErrno err;
@@ -712,6 +768,9 @@ void ZPhysicalMemoryBacking::map(uintptr_t addr, size_t size, uintptr_t offset)
}
void ZPhysicalMemoryBacking::unmap(uintptr_t addr, size_t size) const {
+#ifdef AARCH64
+ addr = CLEAR_COLOR_BITS(addr);
+#endif // AARCH64
// Note that we must keep the address space reservation intact and just detach
// the backing memory. For this reason we map a new anonymous, non-accessible
// and non-reserved page over the mapping instead of actually unmapping.
diff --git a/src/hotspot/share/asm/codeBuffer.cpp b/src/hotspot/share/asm/codeBuffer.cpp
index 0012152d4..c89c8ee3b 100644
--- a/src/hotspot/share/asm/codeBuffer.cpp
+++ b/src/hotspot/share/asm/codeBuffer.cpp
@@ -331,7 +331,8 @@ void CodeSection::relocate(address at, RelocationHolder const& spec, int format)
rtype == relocInfo::runtime_call_type ||
rtype == relocInfo::internal_word_type||
rtype == relocInfo::section_word_type ||
- rtype == relocInfo::external_word_type,
+ rtype == relocInfo::external_word_type||
+ rtype == relocInfo::barrier_type,
"code needs relocation information");
// leave behind an indication that we attempted a relocation
DEBUG_ONLY(_locs_start = _locs_limit = (relocInfo*)badAddress);
diff --git a/src/hotspot/share/code/relocInfo.hpp b/src/hotspot/share/code/relocInfo.hpp
index 55d4ac7c6..57d2126fb 100644
--- a/src/hotspot/share/code/relocInfo.hpp
+++ b/src/hotspot/share/code/relocInfo.hpp
@@ -268,7 +268,8 @@ class relocInfo {
trampoline_stub_type = 13, // stub-entry for trampoline
runtime_call_w_cp_type = 14, // Runtime call which may load its target from the constant pool
data_prefix_tag = 15, // tag for a prefix (carries data arguments)
- type_mask = 15 // A mask which selects only the above values
+ barrier_type = 16, // GC barrier data
+ type_mask = 31 // A mask which selects only the above values
};
private:
@@ -307,12 +308,13 @@ class relocInfo {
visitor(poll_return) \
visitor(section_word) \
visitor(trampoline_stub) \
+ visitor(barrier) \
public:
enum {
value_width = sizeof(unsigned short) * BitsPerByte,
- type_width = 4, // == log2(type_mask+1)
+ type_width = 5, // == log2(type_mask+1)
nontype_width = value_width - type_width,
datalen_width = nontype_width-1,
datalen_tag = 1 << datalen_width, // or-ed into _value
@@ -994,6 +996,29 @@ class metadata_Relocation : public DataRelocation {
// Note: metadata_value transparently converts Universe::non_metadata_word to NULL.
};
+class barrier_Relocation : public DataRelocation {
+
+ public:
+ // The uninitialized value used before the relocation has been patched.
+ // Code assumes that the unpatched value is zero.
+ static const int16_t unpatched = 0;
+
+ static RelocationHolder spec() {
+ RelocationHolder rh = newHolder();
+ new(rh) barrier_Relocation();
+ return rh;
+ }
+
+ private:
+ friend class RelocIterator;
+ barrier_Relocation() : DataRelocation(relocInfo::barrier_type) { }
+
+ public:
+ virtual int offset() { ShouldNotReachHere(); return 0; }
+ virtual address value() { ShouldNotReachHere(); return NULL; }
+ virtual void set_value(address x) { ShouldNotReachHere(); }
+ virtual void set_value(address x, intptr_t o) { ShouldNotReachHere(); }
+};
class virtual_call_Relocation : public CallRelocation {
diff --git a/src/hotspot/share/gc/z/vmStructs_z.cpp b/src/hotspot/share/gc/z/vmStructs_z.cpp
index c86d11c81..e68077ccb 100644
--- a/src/hotspot/share/gc/z/vmStructs_z.cpp
+++ b/src/hotspot/share/gc/z/vmStructs_z.cpp
@@ -27,6 +27,7 @@
ZGlobalsForVMStructs::ZGlobalsForVMStructs() :
_ZGlobalPhase(&ZGlobalPhase),
_ZGlobalSeqNum(&ZGlobalSeqNum),
+ _ZAddressBase(&ZAddressBase),
_ZAddressOffsetMask(&ZAddressOffsetMask),
_ZAddressMetadataMask(&ZAddressMetadataMask),
_ZAddressMetadataFinalizable(&ZAddressMetadataFinalizable),
diff --git a/src/hotspot/share/gc/z/vmStructs_z.hpp b/src/hotspot/share/gc/z/vmStructs_z.hpp
index 3c0eb9f74..f8754e0cb 100644
--- a/src/hotspot/share/gc/z/vmStructs_z.hpp
+++ b/src/hotspot/share/gc/z/vmStructs_z.hpp
@@ -45,6 +45,7 @@ public:
uint32_t* _ZGlobalSeqNum;
+ uintptr_t* _ZAddressBase;
uintptr_t* _ZAddressOffsetMask;
uintptr_t* _ZAddressMetadataMask;
uintptr_t* _ZAddressMetadataFinalizable;
@@ -64,6 +65,7 @@ typedef ZAttachedArray<ZForwarding, ZForwardingEntry> ZAttachedArrayForForwardin
static_field(ZGlobalsForVMStructs, _instance_p, ZGlobalsForVMStructs*) \
nonstatic_field(ZGlobalsForVMStructs, _ZGlobalPhase, uint32_t*) \
nonstatic_field(ZGlobalsForVMStructs, _ZGlobalSeqNum, uint32_t*) \
+ nonstatic_field(ZGlobalsForVMStructs, _ZAddressBase, uintptr_t*) \
nonstatic_field(ZGlobalsForVMStructs, _ZAddressOffsetMask, uintptr_t*) \
nonstatic_field(ZGlobalsForVMStructs, _ZAddressMetadataMask, uintptr_t*) \
nonstatic_field(ZGlobalsForVMStructs, _ZAddressMetadataFinalizable, uintptr_t*) \
@@ -120,6 +122,7 @@ typedef ZAttachedArray<ZForwarding, ZForwardingEntry> ZAttachedArrayForForwardin
declare_constant(ZPageSizeMediumShift) \
declare_constant(ZAddressOffsetShift) \
declare_constant(ZAddressOffsetBits) \
+ declare_constant(ZAddressBase) \
declare_constant(ZAddressOffsetMask) \
declare_constant(ZAddressOffsetMax)
diff --git a/src/hotspot/share/gc/z/zAddress.cpp b/src/hotspot/share/gc/z/zAddress.cpp
index cfa7c04d3..47935d4c1 100644
--- a/src/hotspot/share/gc/z/zAddress.cpp
+++ b/src/hotspot/share/gc/z/zAddress.cpp
@@ -32,6 +32,12 @@ void ZAddress::set_good_mask(uintptr_t mask) {
}
void ZAddress::initialize() {
+#ifdef AARCH64
+ ZAddressBase = ZPlatformAddressBase();
+#else
+ ZAddressBase = 0;
+#endif
+
ZAddressOffsetBits = ZPlatformAddressOffsetBits();
ZAddressOffsetMask = (((uintptr_t)1 << ZAddressOffsetBits) - 1) << ZAddressOffsetShift;
ZAddressOffsetMax = (uintptr_t)1 << ZAddressOffsetBits;
diff --git a/src/hotspot/share/gc/z/zAddress.hpp b/src/hotspot/share/gc/z/zAddress.hpp
index eddd10418..c9e7449dc 100644
--- a/src/hotspot/share/gc/z/zAddress.hpp
+++ b/src/hotspot/share/gc/z/zAddress.hpp
@@ -52,6 +52,9 @@ public:
static bool is_remapped(uintptr_t value);
static bool is_in(uintptr_t value);
+#ifdef AARCH64
+ static uintptr_t base(uintptr_t value);
+#endif
static uintptr_t offset(uintptr_t value);
static uintptr_t good(uintptr_t value);
static uintptr_t good_or_null(uintptr_t value);
diff --git a/src/hotspot/share/gc/z/zAddress.inline.hpp b/src/hotspot/share/gc/z/zAddress.inline.hpp
index a151e7182..c8b560490 100644
--- a/src/hotspot/share/gc/z/zAddress.inline.hpp
+++ b/src/hotspot/share/gc/z/zAddress.inline.hpp
@@ -31,6 +31,12 @@
#include "utilities/macros.hpp"
#include "utilities/powerOfTwo.hpp"
+#ifdef AARCH64
+#define AARCH64_BASE(x) base(x)
+#else
+#define AARCH64_BASE(x) (x)
+#endif
+
inline bool ZAddress::is_null(uintptr_t value) {
return value == 0;
}
@@ -90,7 +96,11 @@ inline bool ZAddress::is_remapped(uintptr_t value) {
inline bool ZAddress::is_in(uintptr_t value) {
// Check that exactly one non-offset bit is set
+#ifdef AARCH64
+ if (!is_power_of_2(value & ~ZAddressOffsetMask & ~ZAddressBase)) {
+#else
if (!is_power_of_2(value & ~ZAddressOffsetMask)) {
+#endif
return false;
}
@@ -98,12 +108,18 @@ inline bool ZAddress::is_in(uintptr_t value) {
return value & (ZAddressMetadataMask & ~ZAddressMetadataFinalizable);
}
+#ifdef AARCH64
+inline uintptr_t ZAddress::base(uintptr_t value) {
+ return value | ZAddressBase;
+}
+#endif
+
inline uintptr_t ZAddress::offset(uintptr_t value) {
return value & ZAddressOffsetMask;
}
inline uintptr_t ZAddress::good(uintptr_t value) {
- return offset(value) | ZAddressGoodMask;
+ return AARCH64_BASE(offset(value) | ZAddressGoodMask);
}
inline uintptr_t ZAddress::good_or_null(uintptr_t value) {
@@ -111,27 +127,29 @@ inline uintptr_t ZAddress::good_or_null(uintptr_t value) {
}
inline uintptr_t ZAddress::finalizable_good(uintptr_t value) {
- return offset(value) | ZAddressMetadataFinalizable | ZAddressGoodMask;
+ return AARCH64_BASE(offset(value) | ZAddressMetadataFinalizable | ZAddressGoodMask);
}
inline uintptr_t ZAddress::marked(uintptr_t value) {
- return offset(value) | ZAddressMetadataMarked;
+ return AARCH64_BASE(offset(value) | ZAddressMetadataMarked);
}
inline uintptr_t ZAddress::marked0(uintptr_t value) {
- return offset(value) | ZAddressMetadataMarked0;
+ return AARCH64_BASE(offset(value) | ZAddressMetadataMarked0);
}
inline uintptr_t ZAddress::marked1(uintptr_t value) {
- return offset(value) | ZAddressMetadataMarked1;
+ return AARCH64_BASE(offset(value) | ZAddressMetadataMarked1);
}
inline uintptr_t ZAddress::remapped(uintptr_t value) {
- return offset(value) | ZAddressMetadataRemapped;
+ return AARCH64_BASE(offset(value) | ZAddressMetadataRemapped);
}
inline uintptr_t ZAddress::remapped_or_null(uintptr_t value) {
return is_null(value) ? 0 : remapped(value);
}
+#undef AARCH64_BASE
+
#endif // SHARE_GC_Z_ZADDRESS_INLINE_HPP
diff --git a/src/hotspot/share/gc/z/zBarrierSetNMethod.cpp b/src/hotspot/share/gc/z/zBarrierSetNMethod.cpp
index 9916178cc..e5a2ab09a 100644
--- a/src/hotspot/share/gc/z/zBarrierSetNMethod.cpp
+++ b/src/hotspot/share/gc/z/zBarrierSetNMethod.cpp
@@ -55,6 +55,13 @@ bool ZBarrierSetNMethod::nmethod_entry_barrier(nmethod* nm) {
return false;
}
+#ifdef AARCH64
+ if (UseTBI) {
+ // Heal barriers
+ ZNMethod::nmethod_patch_barriers(nm);
+ }
+#endif
+
// Heal oops
ZNMethod::nmethod_oops_barrier(nm);
diff --git a/src/hotspot/share/gc/z/zGlobals.cpp b/src/hotspot/share/gc/z/zGlobals.cpp
index 28200e23b..cc82e9335 100644
--- a/src/hotspot/share/gc/z/zGlobals.cpp
+++ b/src/hotspot/share/gc/z/zGlobals.cpp
@@ -49,6 +49,7 @@ static uint32_t* ZAddressCalculateBadMaskHighOrderBitsAddr() {
uint32_t* ZAddressBadMaskHighOrderBitsAddr = ZAddressCalculateBadMaskHighOrderBitsAddr();
+uintptr_t ZAddressBase;
size_t ZAddressOffsetBits;
uintptr_t ZAddressOffsetMask;
size_t ZAddressOffsetMax;
diff --git a/src/hotspot/share/gc/z/zGlobals.hpp b/src/hotspot/share/gc/z/zGlobals.hpp
index 300f6489a..783411a82 100644
--- a/src/hotspot/share/gc/z/zGlobals.hpp
+++ b/src/hotspot/share/gc/z/zGlobals.hpp
@@ -102,6 +102,7 @@ extern uint32_t* ZAddressBadMaskHighOrderBitsAddr;
const int ZAddressBadMaskHighOrderBitsOffset = LITTLE_ENDIAN_ONLY(4) BIG_ENDIAN_ONLY(0);
// Pointer part of address
+extern uintptr_t ZAddressBase;
extern size_t ZAddressOffsetBits;
const size_t ZAddressOffsetShift = 0;
extern uintptr_t ZAddressOffsetMask;
diff --git a/src/hotspot/share/gc/z/zMark.cpp b/src/hotspot/share/gc/z/zMark.cpp
index edc80925d..8a527107a 100644
--- a/src/hotspot/share/gc/z/zMark.cpp
+++ b/src/hotspot/share/gc/z/zMark.cpp
@@ -643,6 +643,13 @@ public:
}
if (ZNMethod::is_armed(nm)) {
+#ifdef AARCH64
+ if (UseTBI) {
+ // Heal barriers
+ ZNMethod::nmethod_patch_barriers(nm);
+ }
+#endif
+
ZNMethod::nmethod_oops_do_inner(nm, _cl);
ZNMethod::disarm(nm);
}
diff --git a/src/hotspot/share/gc/z/zMarkStackEntry.hpp b/src/hotspot/share/gc/z/zMarkStackEntry.hpp
index fbb798cc8..ba66717c1 100644
--- a/src/hotspot/share/gc/z/zMarkStackEntry.hpp
+++ b/src/hotspot/share/gc/z/zMarkStackEntry.hpp
@@ -78,7 +78,8 @@ private:
typedef ZBitField<uint64_t, bool, 2, 1> field_follow;
typedef ZBitField<uint64_t, bool, 3, 1> field_inc_live;
typedef ZBitField<uint64_t, bool, 4, 1> field_mark;
- typedef ZBitField<uint64_t, uintptr_t, 5, 59> field_object_address;
+ // Set ValueShift to 2 to avoid the top bits being cleared.
+ typedef ZBitField<uint64_t, uintptr_t, 5, 59, 2> field_object_address;
typedef ZBitField<uint64_t, size_t, 2, 30> field_partial_array_length;
typedef ZBitField<uint64_t, size_t, 32, 32> field_partial_array_offset;
diff --git a/src/hotspot/share/gc/z/zNMethod.cpp b/src/hotspot/share/gc/z/zNMethod.cpp
index 71f510c2e..777ade668 100644
--- a/src/hotspot/share/gc/z/zNMethod.cpp
+++ b/src/hotspot/share/gc/z/zNMethod.cpp
@@ -28,7 +28,10 @@
#include "gc/shared/barrierSet.hpp"
#include "gc/shared/barrierSetNMethod.hpp"
#include "gc/shared/suspendibleThreadSet.hpp"
+#include "gc/z/zArray.inline.hpp"
#include "gc/z/zBarrier.inline.hpp"
+#include "gc/z/zBarrierSet.hpp"
+#include "gc/z/zBarrierSetAssembler.hpp"
#include "gc/z/zGlobals.hpp"
#include "gc/z/zLock.inline.hpp"
#include "gc/z/zNMethod.hpp"
@@ -54,12 +57,23 @@ static void set_gc_data(nmethod* nm, ZNMethodData* data) {
}
void ZNMethod::attach_gc_data(nmethod* nm) {
+#ifdef AARCH64
+ ZArray<address> barriers;
+#endif
GrowableArray<oop*> immediate_oops;
bool non_immediate_oops = false;
- // Find all oop relocations
+ // Find all barrier and oop relocations
RelocIterator iter(nm);
while (iter.next()) {
+#ifdef AARCH64
+ if (UseTBI && iter.type() == relocInfo::barrier_type) {
+ // Barrier relocation
+ barrier_Relocation* const reloc = iter.barrier_reloc();
+ barriers.push(reloc->addr());
+ continue;
+ }
+#endif
if (iter.type() != relocInfo::oop_type) {
// Not an oop
continue;
@@ -92,9 +106,16 @@ void ZNMethod::attach_gc_data(nmethod* nm) {
ZNMethodDataOops* const new_oops = ZNMethodDataOops::create(immediate_oops, non_immediate_oops);
ZNMethodDataOops* const old_oops = data->swap_oops(new_oops);
ZNMethodDataOops::destroy(old_oops);
+
+#ifdef AARCH64
+ if (UseTBI) {
+ // Attach barriers in GC data
+ data->swap_barriers(&barriers);
+ }
+#endif
}
-ZReentrantLock* ZNMethod::lock_for_nmethod(nmethod* nm) {
+ZReentrantLock* ZNMethod::lock_for_nmethod(const nmethod* nm) {
return gc_data(nm)->lock();
}
@@ -116,6 +137,20 @@ void ZNMethod::log_register(const nmethod* nm) {
oops->immediates_count(),
oops->has_non_immediates() ? "Yes" : "No");
+#ifdef AARCH64
+ if (UseTBI) {
+ LogTarget(Trace, gc, nmethod, barrier) log_barriers;
+ if (log_barriers.is_enabled()) {
+ // Print nmethod barriers
+ ZLocker<ZReentrantLock> locker(lock_for_nmethod(nm));
+ ZArrayIterator<address> iter(gc_data(nm)->barriers());
+ for (address b; iter.next(&b);) {
+ log_barriers.print(" Barrier: " PTR_FORMAT, p2i(b));
+ }
+ }
+ }
+#endif
+
LogTarget(Trace, gc, nmethod, oops) log_oops;
if (!log_oops.is_enabled()) {
return;
@@ -164,6 +199,15 @@ void ZNMethod::register_nmethod(nmethod* nm) {
log_register(nm);
+#ifdef AARCH64
+ if (UseTBI) {
+ ZLocker<ZReentrantLock> locker(lock_for_nmethod(nm));
+ // Patch nmathod barriers
+ nmethod_patch_barriers(nm);
+ }
+#endif
+
+ // Register nmethod
ZNMethodTable::register_nmethod(nm);
// Disarm nmethod entry barrier
@@ -206,6 +250,16 @@ void ZNMethod::disarm(nmethod* nm) {
bs->disarm(nm);
}
+#ifdef AARCH64
+void ZNMethod::nmethod_patch_barriers(nmethod* nm) {
+ ZBarrierSetAssembler* const bs_asm = ZBarrierSet::assembler();
+ ZArrayIterator<address> iter(gc_data(nm)->barriers());
+ for (address barrier; iter.next(&barrier);) {
+ bs_asm->patch_barrier_relocation(barrier);
+ }
+}
+#endif
+
void ZNMethod::nmethod_oops_do(nmethod* nm, OopClosure* cl) {
ZLocker<ZReentrantLock> locker(ZNMethod::lock_for_nmethod(nm));
if (!nm->is_alive()) {
@@ -329,6 +383,13 @@ public:
ZLocker<ZReentrantLock> locker(ZNMethod::lock_for_nmethod(nm));
if (ZNMethod::is_armed(nm)) {
+#ifdef AARCH64
+ if (UseTBI) {
+ // Heal barriers
+ ZNMethod::nmethod_patch_barriers(nm);
+ }
+#endif
+
// Heal oops and disarm
ZNMethod::nmethod_oops_barrier(nm);
ZNMethod::disarm(nm);
diff --git a/src/hotspot/share/gc/z/zNMethod.hpp b/src/hotspot/share/gc/z/zNMethod.hpp
index 40ac93adb..bfe6af377 100644
--- a/src/hotspot/share/gc/z/zNMethod.hpp
+++ b/src/hotspot/share/gc/z/zNMethod.hpp
@@ -48,6 +48,10 @@ public:
static bool is_armed(nmethod* nm);
static void disarm(nmethod* nm);
+#ifdef AARCH64
+ static void nmethod_patch_barriers(nmethod* nm);
+#endif
+
static void nmethod_oops_do(nmethod* nm, OopClosure* cl);
static void nmethod_oops_do_inner(nmethod* nm, OopClosure* cl);
@@ -57,7 +61,7 @@ public:
static void nmethods_do_end();
static void nmethods_do(NMethodClosure* cl);
- static ZReentrantLock* lock_for_nmethod(nmethod* nm);
+ static ZReentrantLock* lock_for_nmethod(const nmethod* nm);
static void unlink(ZWorkers* workers, bool unloading_occurred);
static void purge(ZWorkers* workers);
diff --git a/src/hotspot/share/gc/z/zNMethodData.cpp b/src/hotspot/share/gc/z/zNMethodData.cpp
index c6efbfe66..70d06557f 100644
--- a/src/hotspot/share/gc/z/zNMethodData.cpp
+++ b/src/hotspot/share/gc/z/zNMethodData.cpp
@@ -86,3 +86,15 @@ ZNMethodDataOops* ZNMethodData::swap_oops(ZNMethodDataOops* new_oops) {
_oops = new_oops;
return old_oops;
}
+
+#ifdef AARCH64
+const ZArray<address>* ZNMethodData::barriers() const {
+ assert(_lock.is_owned(), "Should be owned");
+ return &_barriers;
+}
+
+void ZNMethodData::swap_barriers(ZArray<address>* new_barriers) {
+ ZLocker<ZReentrantLock> locker(&_lock);
+ _barriers.swap(new_barriers);
+}
+#endif
\ No newline at end of file
diff --git a/src/hotspot/share/gc/z/zNMethodData.hpp b/src/hotspot/share/gc/z/zNMethodData.hpp
index 7afd60105..1013855c9 100644
--- a/src/hotspot/share/gc/z/zNMethodData.hpp
+++ b/src/hotspot/share/gc/z/zNMethodData.hpp
@@ -24,6 +24,7 @@
#ifndef SHARE_GC_Z_ZNMETHODDATA_HPP
#define SHARE_GC_Z_ZNMETHODDATA_HPP
+#include "gc/z/zArray.hpp"
#include "gc/z/zAttachedArray.hpp"
#include "gc/z/zLock.hpp"
#include "memory/allocation.hpp"
@@ -57,6 +58,9 @@ class ZNMethodData : public CHeapObj<mtGC> {
private:
ZReentrantLock _lock;
ZNMethodDataOops* volatile _oops;
+#ifdef AARCH64
+ ZArray<address> _barriers;
+#endif
public:
ZNMethodData();
@@ -66,6 +70,11 @@ public:
ZNMethodDataOops* oops() const;
ZNMethodDataOops* swap_oops(ZNMethodDataOops* oops);
+
+#ifdef AARCH64
+ const ZArray<address>* barriers() const;
+ void swap_barriers(ZArray<address>* barriers);
+#endif
};
#endif // SHARE_GC_Z_ZNMETHODDATA_HPP
diff --git a/src/hotspot/share/gc/z/zPhysicalMemory.cpp b/src/hotspot/share/gc/z/zPhysicalMemory.cpp
index ad8b762bd..38422d37c 100644
--- a/src/hotspot/share/gc/z/zPhysicalMemory.cpp
+++ b/src/hotspot/share/gc/z/zPhysicalMemory.cpp
@@ -277,13 +277,21 @@ void ZPhysicalMemoryManager::try_enable_uncommit(size_t min_capacity, size_t max
void ZPhysicalMemoryManager::nmt_commit(uintptr_t offset, size_t size) const {
// From an NMT point of view we treat the first heap view (marked0) as committed
+#ifdef AARCH64
+ const uintptr_t addr = UseTBI ? ZAddress::base(offset) : ZAddress::marked0(offset);
+#else // AARCH64
const uintptr_t addr = ZAddress::marked0(offset);
+#endif // AARCH64
MemTracker::record_virtual_memory_commit((void*)addr, size, CALLER_PC);
}
void ZPhysicalMemoryManager::nmt_uncommit(uintptr_t offset, size_t size) const {
if (MemTracker::enabled()) {
+#ifdef AARCH64
+ const uintptr_t addr = UseTBI ? ZAddress::base(offset) : ZAddress::marked0(offset);
+#else // AARCH64
const uintptr_t addr = ZAddress::marked0(offset);
+#endif // AARCH64
Tracker tracker(Tracker::uncommit);
tracker.record((address)addr, size);
}
@@ -291,6 +299,13 @@ void ZPhysicalMemoryManager::nmt_uncommit(uintptr_t offset, size_t size) const {
void ZPhysicalMemoryManager::alloc(ZPhysicalMemory& pmem, size_t size) {
assert(is_aligned(size, ZGranuleSize), "Invalid size");
+#ifdef AARCH64
+ if (UseTBI) {
+ // We don't use _manager to alloc addresses.
+ pmem.add_segment(ZPhysicalMemorySegment(0, size, false /* committed */));
+ return;
+ }
+#endif // AARCH64
// Allocate segments
while (size > 0) {
@@ -303,6 +318,13 @@ void ZPhysicalMemoryManager::alloc(ZPhysicalMemory& pmem, size_t size) {
}
void ZPhysicalMemoryManager::free(const ZPhysicalMemory& pmem) {
+#ifdef AARCH64
+ if (UseTBI) {
+ // We don't use _manager to alloc addresses.
+ return;
+ }
+#endif // AARCH64
+
// Free segments
for (int i = 0; i < pmem.nsegments(); i++) {
const ZPhysicalMemorySegment& segment = pmem.segment(i);
@@ -381,6 +403,13 @@ void ZPhysicalMemoryManager::unmap_view(uintptr_t addr, size_t size) const {
}
void ZPhysicalMemoryManager::pretouch(uintptr_t offset, size_t size) const {
+#ifdef AARCH64
+ if (UseTBI) {
+ pretouch_view(ZAddress::base(offset), size);
+ return;
+ }
+#endif // AARCH64
+
if (ZVerifyViews) {
// Pre-touch good view
pretouch_view(ZAddress::good(offset), size);
@@ -394,6 +423,13 @@ void ZPhysicalMemoryManager::pretouch(uintptr_t offset, size_t size) const {
void ZPhysicalMemoryManager::map(uintptr_t offset, const ZPhysicalMemory& pmem) const {
const size_t size = pmem.size();
+#ifdef AARCH64
+ if (UseTBI) {
+ map_view(ZAddress::base(offset), pmem);
+ nmt_commit(offset, size);
+ return;
+ }
+#endif // AARCH64
if (ZVerifyViews) {
// Map good view
@@ -410,6 +446,12 @@ void ZPhysicalMemoryManager::map(uintptr_t offset, const ZPhysicalMemory& pmem)
void ZPhysicalMemoryManager::unmap(uintptr_t offset, size_t size) const {
nmt_uncommit(offset, size);
+#ifdef AARCH64
+ if (UseTBI) {
+ unmap_view(ZAddress::base(offset), size);
+ return;
+ }
+#endif // AARCH64
if (ZVerifyViews) {
// Unmap good view
@@ -423,12 +465,24 @@ void ZPhysicalMemoryManager::unmap(uintptr_t offset, size_t size) const {
}
void ZPhysicalMemoryManager::debug_map(uintptr_t offset, const ZPhysicalMemory& pmem) const {
+#ifdef AARCH64
+ if (UseTBI) {
+ // Does nothing when using VA-masking
+ return;
+ }
+#endif // AARCH64
// Map good view
assert(ZVerifyViews, "Should be enabled");
map_view(ZAddress::good(offset), pmem);
}
void ZPhysicalMemoryManager::debug_unmap(uintptr_t offset, size_t size) const {
+#ifdef AARCH64
+ if (UseTBI) {
+ // Does nothing when using VA-masking
+ return;
+ }
+#endif // AARCH64
// Unmap good view
assert(ZVerifyViews, "Should be enabled");
unmap_view(ZAddress::good(offset), size);
diff --git a/src/hotspot/share/gc/z/zVirtualMemory.cpp b/src/hotspot/share/gc/z/zVirtualMemory.cpp
index 4f9c9bd4b..cb50ae803 100644
--- a/src/hotspot/share/gc/z/zVirtualMemory.cpp
+++ b/src/hotspot/share/gc/z/zVirtualMemory.cpp
@@ -104,6 +104,21 @@ size_t ZVirtualMemoryManager::reserve_discontiguous(size_t size) {
bool ZVirtualMemoryManager::reserve_contiguous(uintptr_t start, size_t size) {
assert(is_aligned(size, ZGranuleSize), "Must be granule aligned");
+#ifdef AARCH64
+ if (UseTBI) {
+ const uintptr_t addr = ZAddress::base(start);
+ if (!pd_reserve(addr, size)) {
+ return false;
+ }
+ nmt_reserve(addr, size);
+
+ // Make the address range free
+ _manager.free(start, size);
+
+ return true;
+ }
+#endif // AARCH64
+
// Reserve address views
const uintptr_t marked0 = ZAddress::marked0(start);
const uintptr_t marked1 = ZAddress::marked1(start);
diff --git a/src/hotspot/share/jfr/writers/jfrStreamWriterHost.inline.hpp b/src/hotspot/share/jfr/writers/jfrStreamWriterHost.inline.hpp
index f8900a13b..356c6ca8b 100644
--- a/src/hotspot/share/jfr/writers/jfrStreamWriterHost.inline.hpp
+++ b/src/hotspot/share/jfr/writers/jfrStreamWriterHost.inline.hpp
@@ -28,6 +28,7 @@
#include "jfr/jni/jfrJavaSupport.hpp"
#include "jfr/writers/jfrStreamWriterHost.hpp"
#include "runtime/os.hpp"
+#include "runtime/globals.hpp"
template <typename Adapter, typename AP>
StreamWriterHost<Adapter, AP>::StreamWriterHost(typename Adapter::StorageType* storage, Thread* thread) :
@@ -74,6 +75,9 @@ inline void StreamWriterHost<Adapter, AP>::write_bytes(void* dest, const void* b
template <typename Adapter, typename AP>
inline void StreamWriterHost<Adapter, AP>::write_bytes(const u1* buf, intptr_t len) {
assert(len >= 0, "invariant");
+#ifdef AARCH64
+ buf = (const u1*) CLEAR_COLOR_BITS((uintptr_t) buf);
+#endif
while (len > 0) {
const unsigned int nBytes = len > INT_MAX ? INT_MAX : (unsigned int)len;
const bool successful_write = os::write(_fd, buf, nBytes);
diff --git a/src/hotspot/share/prims/jni.cpp b/src/hotspot/share/prims/jni.cpp
index cd0115248..41e946563 100644
--- a/src/hotspot/share/prims/jni.cpp
+++ b/src/hotspot/share/prims/jni.cpp
@@ -2831,6 +2831,9 @@ JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboole
type = TypeArrayKlass::cast(a->klass())->element_type();
}
void* ret = arrayOop(a)->base(type);
+#ifdef AARCH64
+ ret = (void*) CLEAR_COLOR_BITS((uintptr_t) ret);
+#endif // AARCH64
HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
return ret;
JNI_END
@@ -2893,6 +2896,9 @@ JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jbool
}
if (isCopy != NULL) *isCopy = JNI_TRUE;
}
+#ifdef AARCH64
+ ret = (jchar*) CLEAR_COLOR_BITS((uintptr_t) ret);
+#endif // AARCH64
HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
return ret;
JNI_END
diff --git a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZAddress.java b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZAddress.java
index 52d9555e4..4a449d9d4 100644
--- a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZAddress.java
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZAddress.java
@@ -51,12 +51,18 @@ class ZAddress {
return !is_weak_bad(value);
}
+ static long base(long address) {
+ // ZAddressBase is a non-zero value only when flag UseTBI is on.
+ // So nothing changes when the arch is not Aarch64 or UseTBI is off.
+ return address | ZGlobals.ZAddressBase();
+ }
+
static long offset(Address address) {
return as_long(address) & ZGlobals.ZAddressOffsetMask();
}
static Address good(Address value) {
- return VM.getVM().getDebugger().newAddress(offset(value) | ZGlobals.ZAddressGoodMask());
+ return VM.getVM().getDebugger().newAddress(base(offset(value) | ZGlobals.ZAddressGoodMask()));
}
static Address good_or_null(Address value) {
@@ -69,9 +75,14 @@ class ZAddress {
static boolean isIn(Address addr) {
long value = as_long(addr);
- if (!isPowerOf2(value & ~ZGlobals.ZAddressOffsetMask())) {
+ if (!isPowerOf2(value & ~ZGlobals.ZAddressOffsetMask() & ~ZGlobals.ZAddressBase())) {
return false;
}
return (value & (ZGlobals.ZAddressMetadataMask() & ~ZGlobals.ZAddressMetadataFinalizable())) != 0L;
}
+
+ static Address clearTopByte(Address value) {
+ // (1L << 56) - 1 = 0x 00ff ffff ffff ffff
+ return VM.getVM().getDebugger().newAddress(as_long(value) & ((1L << 56) - 1));
+ }
}
diff --git a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZCollectedHeap.java b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZCollectedHeap.java
index c55370ef7..dd74913dd 100644
--- a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZCollectedHeap.java
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZCollectedHeap.java
@@ -92,6 +92,9 @@ public class ZCollectedHeap extends CollectedHeap {
if (oopAddress == null) {
return null;
}
+ if (ZUtils.getUseTBI()) {
+ oopAddress = ZAddress.clearTopByte(oopAddress);
+ }
return oopAddress.addOffsetToAsOopHandle(0);
}
diff --git a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZGlobals.java b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZGlobals.java
index e01f7b832..41c9bb37b 100644
--- a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZGlobals.java
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZGlobals.java
@@ -98,6 +98,10 @@ public class ZGlobals {
return instance().ZGlobalSeqNum();
}
+ public static long ZAddressBase() {
+ return instance().ZAddressBase();
+ }
+
public static long ZAddressOffsetMask() {
return instance().ZAddressOffsetMask();
}
diff --git a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZGlobalsForVMStructs.java b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZGlobalsForVMStructs.java
index 28d33f4d9..12054c92a 100644
--- a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZGlobalsForVMStructs.java
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZGlobalsForVMStructs.java
@@ -34,6 +34,7 @@ import sun.jvm.hotspot.types.TypeDataBase;
class ZGlobalsForVMStructs extends VMObject {
private static AddressField ZGlobalPhaseField;
private static AddressField ZGlobalSeqNumField;
+ private static AddressField ZAddressBaseField;
private static AddressField ZAddressOffsetMaskField;
private static AddressField ZAddressMetadataMaskField;
private static AddressField ZAddressMetadataFinalizableField;
@@ -52,6 +53,7 @@ class ZGlobalsForVMStructs extends VMObject {
ZGlobalPhaseField = type.getAddressField("_ZGlobalPhase");
ZGlobalSeqNumField = type.getAddressField("_ZGlobalSeqNum");
+ ZAddressBaseField = type.getAddressField("_ZAddressBase");
ZAddressOffsetMaskField = type.getAddressField("_ZAddressOffsetMask");
ZAddressMetadataMaskField = type.getAddressField("_ZAddressMetadataMask");
ZAddressMetadataFinalizableField = type.getAddressField("_ZAddressMetadataFinalizable");
@@ -74,6 +76,10 @@ class ZGlobalsForVMStructs extends VMObject {
return ZGlobalSeqNumField.getValue(addr).getJIntAt(0);
}
+ long ZAddressBase() {
+ return ZAddressBaseField.getValue(addr).getJLongAt(0);
+ }
+
long ZAddressOffsetMask() {
return ZAddressOffsetMaskField.getValue(addr).getJLongAt(0);
}
diff --git a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZUtils.java b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZUtils.java
index 2029a71da..65930a006 100644
--- a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZUtils.java
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZUtils.java
@@ -37,4 +37,9 @@ class ZUtils {
long adjusted = size + mask;
return adjusted & ~mask;
}
+
+ static boolean getUseTBI() {
+ VM.Flag flag = VM.getVM().getCommandLineFlag("UseTBI");
+ return flag == null ? false : flag.getBool();
+ }
}
--
2.17.1
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