text stringlengths 9 39.2M | dir stringlengths 25 226 | lang stringclasses 163
values | created_date timestamp[s] | updated_date timestamp[s] | repo_name stringclasses 751
values | repo_full_name stringclasses 752
values | star int64 1.01k 183k | len_tokens int64 1 18.5M |
|---|---|---|---|---|---|---|---|---|
```go
package references
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
// Invoke interface method
type INVOKE_INTERFACE struct {
index uint
// count uint8
// zero uint8
}
func (self *INVOKE_INTERFACE) FetchOperands(reader *base.BytecodeReader) {
self.index = uint(re... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/references/invokeinterface.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 349 |
```go
package references
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Get length of array
type ARRAY_LENGTH struct{ base.NoOperandsInstruction }
func (self *ARRAY_LENGTH) Execute(frame *rtda.Frame) {
stack := frame.OperandStack()
arrRef := stack.PopRef()
if arrRef == nil {
panic("java.lang.... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/references/arraylength.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 104 |
```go
package references
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
// Determine if object is of given type
type INSTANCE_OF struct{ base.Index16Instruction }
func (self *INSTANCE_OF) Execute(frame *rtda.Frame) {
stack := frame.OperandStack()
ref := stack.PopRef()
... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/references/instanceof.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 164 |
```go
package references
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
// Fetch field from object
type GET_FIELD struct{ base.Index16Instruction }
func (self *GET_FIELD) Execute(frame *rtda.Frame) {
cp := frame.Method().Class().ConstantPool()
fieldRef := cp.GetConstan... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/references/getfield.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 275 |
```go
package references
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
// Create new object
type NEW struct{ base.Index16Instruction }
func (self *NEW) Execute(frame *rtda.Frame) {
cp := frame.Method().Class().ConstantPool()
classRef := cp.GetConstant(self.Index).(*he... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/references/new.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 167 |
```go
package references
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
// Set static field in class
type PUT_STATIC struct{ base.Index16Instruction }
func (self *PUT_STATIC) Execute(frame *rtda.Frame) {
currentMethod := frame.Method()
currentClass := currentMethod.Cla... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/references/putstatic.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 342 |
```go
package references
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
const (
//Array Type atype
AT_BOOLEAN = 4
AT_CHAR = 5
AT_FLOAT = 6
AT_DOUBLE = 7
AT_BYTE = 8
AT_SHORT = 9
AT_INT = 10
AT_LONG = 11
)
// Create new array
type NEW_ARRAY str... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/references/newarray.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 368 |
```go
package references
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
// Invoke instance method;
// special handling for superclass, private, and instance initialization method invocations
type INVOKE_SPECIAL struct{ base.Index16Instruction }
func (self *INVOKE_SPECIAL... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/references/invokespecial.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 403 |
```go
package references
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
// Create new array of reference
type ANEW_ARRAY struct{ base.Index16Instruction }
func (self *ANEW_ARRAY) Execute(frame *rtda.Frame) {
cp := frame.Method().Class().ConstantPool()
classRef := cp.Ge... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/references/anewarray.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 214 |
```go
package references
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
// Set field in object
type PUT_FIELD struct{ base.Index16Instruction }
func (self *PUT_FIELD) Execute(frame *rtda.Frame) {
currentMethod := frame.Method()
currentClass := currentMethod.Class()
cp... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/references/putfield.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 453 |
```go
package references
import "fmt"
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
// Invoke instance method; dispatch based on class
type INVOKE_VIRTUAL struct{ base.Index16Instruction }
func (self *INVOKE_VIRTUAL) Execute(frame *rtda.Frame) {
currentClass := frame.M... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/references/invokevirtual.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 551 |
```go
package references
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
// Create new multidimensional array
type MULTI_ANEW_ARRAY struct {
index uint16
dimensions uint8
}
func (self *MULTI_ANEW_ARRAY) FetchOperands(reader *base.BytecodeReader) {
self.index = rea... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/references/multianewarray.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 373 |
```go
package loads
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Load reference from local variable
type ALOAD struct{ base.Index8Instruction }
func (self *ALOAD) Execute(frame *rtda.Frame) {
_aload(frame, self.Index)
}
type ALOAD_0 struct{ base.NoOperandsInstruction }
func (self *ALOAD_0) Ex... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/loads/aload.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 262 |
```go
package loads
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Load double from local variable
type DLOAD struct{ base.Index8Instruction }
func (self *DLOAD) Execute(frame *rtda.Frame) {
_dload(frame, self.Index)
}
type DLOAD_0 struct{ base.NoOperandsInstruction }
func (self *DLOAD_0) Execu... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/loads/dload.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 263 |
```go
package loads
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
// Load reference from array
type AALOAD struct{ base.NoOperandsInstruction }
func (self *AALOAD) Execute(frame *rtda.Frame) {
stack := frame.OperandStack()
index := stack.PopInt()
arrRef := stack.PopR... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/loads/xaload.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 766 |
```go
package loads
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Load int from local variable
type ILOAD struct{ base.Index8Instruction }
func (self *ILOAD) Execute(frame *rtda.Frame) {
_iload(frame, self.Index)
}
type ILOAD_0 struct{ base.NoOperandsInstruction }
func (self *ILOAD_0) Execute(... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/loads/iload.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 262 |
```go
package loads
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Load float from local variable
type FLOAD struct{ base.Index8Instruction }
func (self *FLOAD) Execute(frame *rtda.Frame) {
_fload(frame, self.Index)
}
type FLOAD_0 struct{ base.NoOperandsInstruction }
func (self *FLOAD_0) Execut... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/loads/fload.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 263 |
```go
package loads
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Load long from local variable
type LLOAD struct{ base.Index8Instruction }
func (self *LLOAD) Execute(frame *rtda.Frame) {
_lload(frame, self.Index)
}
type LLOAD_0 struct{ base.NoOperandsInstruction }
func (self *LLOAD_0) Execute... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/loads/lload.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 263 |
```go
package extended
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Branch if reference is null
type IFNULL struct{ base.BranchInstruction }
func (self *IFNULL) Execute(frame *rtda.Frame) {
ref := frame.OperandStack().PopRef()
if ref == nil {
base.Branch(frame, self.Offset)
}
}
// Branch i... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/extended/ifnull.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 144 |
```go
package extended
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/instructions/loads"
import "jvmgo/ch09/instructions/math"
import "jvmgo/ch09/instructions/stores"
import "jvmgo/ch09/rtda"
// Extend local variable index by additional bytes
type WIDE struct {
modifiedInstruction base.Instruction
}
func... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/extended/wide.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 511 |
```go
package extended
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Branch always (wide index)
type GOTO_W struct {
offset int
}
func (self *GOTO_W) FetchOperands(reader *base.BytecodeReader) {
self.offset = int(reader.ReadInt32())
}
func (self *GOTO_W) Execute(frame *rtda.Frame) {
base.Branc... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/extended/goto_w.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 96 |
```go
package comparisons
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Compare long
type LCMP struct{ base.NoOperandsInstruction }
func (self *LCMP) Execute(frame *rtda.Frame) {
stack := frame.OperandStack()
v2 := stack.PopLong()
v1 := stack.PopLong()
if v1 > v2 {
stack.PushInt(1)
} else ... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/comparisons/lcmp.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 123 |
```go
package comparisons
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Branch if int comparison with zero succeeds
type IFEQ struct{ base.BranchInstruction }
func (self *IFEQ) Execute(frame *rtda.Frame) {
val := frame.OperandStack().PopInt()
if val == 0 {
base.Branch(frame, self.Offset)
}
}... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/comparisons/ifcond.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 348 |
```go
package comparisons
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Compare float
type FCMPG struct{ base.NoOperandsInstruction }
func (self *FCMPG) Execute(frame *rtda.Frame) {
_fcmp(frame, true)
}
type FCMPL struct{ base.NoOperandsInstruction }
func (self *FCMPL) Execute(frame *rtda.Fram... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/comparisons/fcmp.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 217 |
```go
package comparisons
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Compare double
type DCMPG struct{ base.NoOperandsInstruction }
func (self *DCMPG) Execute(frame *rtda.Frame) {
_dcmp(frame, true)
}
type DCMPL struct{ base.NoOperandsInstruction }
func (self *DCMPL) Execute(frame *rtda.Fra... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/comparisons/dcmp.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 217 |
```go
package comparisons
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Branch if reference comparison succeeds
type IF_ACMPEQ struct{ base.BranchInstruction }
func (self *IF_ACMPEQ) Execute(frame *rtda.Frame) {
if _acmp(frame) {
base.Branch(frame, self.Offset)
}
}
type IF_ACMPNE struct{ bas... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/comparisons/if_acmp.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 173 |
```go
package comparisons
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Branch if int comparison succeeds
type IF_ICMPEQ struct{ base.BranchInstruction }
func (self *IF_ICMPEQ) Execute(frame *rtda.Frame) {
if val1, val2 := _icmpPop(frame); val1 == val2 {
base.Branch(frame, self.Offset)
}
}
t... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/comparisons/if_icmp.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 430 |
```go
package constants
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Do nothing
type NOP struct{ base.NoOperandsInstruction }
func (self *NOP) Execute(frame *rtda.Frame) {
// really do nothing
}
``` | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/constants/nop.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 62 |
```go
package constants
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
// Push item from run-time constant pool
type LDC struct{ base.Index8Instruction }
func (self *LDC) Execute(frame *rtda.Frame) {
_ldc(frame, self.Index)
}
// Push item from run-time constant pool (w... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/constants/ldc.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 403 |
```go
package constants
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Push byte
type BIPUSH struct {
val int8
}
func (self *BIPUSH) FetchOperands(reader *base.BytecodeReader) {
self.val = reader.ReadInt8()
}
func (self *BIPUSH) Execute(frame *rtda.Frame) {
i := int32(self.val)
frame.OperandSt... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/constants/ipush.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 177 |
```go
package reserved
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/native"
import _ "jvmgo/ch09/native/java/lang"
import _ "jvmgo/ch09/native/sun/misc"
// Invoke native method
type INVOKE_NATIVE struct{ base.NoOperandsInstruction }
func (self *INVOKE_NATIVE) Execute(frame *rtda.... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/reserved/invokenative.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 177 |
```go
package constants
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Push null
type ACONST_NULL struct{ base.NoOperandsInstruction }
func (self *ACONST_NULL) Execute(frame *rtda.Frame) {
frame.OperandStack().PushRef(nil)
}
// Push double
type DCONST_0 struct{ base.NoOperandsInstruction }
func... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/constants/const.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 688 |
```go
package stack
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Pop the top operand stack value
type POP struct{ base.NoOperandsInstruction }
func (self *POP) Execute(frame *rtda.Frame) {
stack := frame.OperandStack()
stack.PopSlot()
}
// Pop the top one or two operand stack values
type POP2... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/stack/pop.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 125 |
```go
package stack
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Swap the top two operand stack values
type SWAP struct{ base.NoOperandsInstruction }
func (self *SWAP) Execute(frame *rtda.Frame) {
stack := frame.OperandStack()
slot1 := stack.PopSlot()
slot2 := stack.PopSlot()
stack.PushSlot(... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/stack/swap.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 96 |
```go
package conversions
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Convert double to float
type D2F struct{ base.NoOperandsInstruction }
func (self *D2F) Execute(frame *rtda.Frame) {
stack := frame.OperandStack()
d := stack.PopDouble()
f := float32(d)
stack.PushFloat(f)
}
// Convert dou... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/conversions/d2x.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 206 |
```go
package stack
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Duplicate the top operand stack value
type DUP struct{ base.NoOperandsInstruction }
func (self *DUP) Execute(frame *rtda.Frame) {
stack := frame.OperandStack()
slot := stack.PopSlot()
stack.PushSlot(slot)
stack.PushSlot(slot)
}... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/stack/dup.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 584 |
```go
package conversions
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Convert int to byte
type I2B struct{ base.NoOperandsInstruction }
func (self *I2B) Execute(frame *rtda.Frame) {
stack := frame.OperandStack()
i := stack.PopInt()
b := int32(int8(i))
stack.PushInt(b)
}
// Convert int to c... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/conversions/i2x.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 392 |
```go
package conversions
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Convert float to double
type F2D struct{ base.NoOperandsInstruction }
func (self *F2D) Execute(frame *rtda.Frame) {
stack := frame.OperandStack()
f := stack.PopFloat()
d := float64(f)
stack.PushDouble(d)
}
// Convert flo... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/conversions/f2x.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 206 |
```go
package conversions
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Convert long to double
type L2D struct{ base.NoOperandsInstruction }
func (self *L2D) Execute(frame *rtda.Frame) {
stack := frame.OperandStack()
l := stack.PopLong()
d := float64(l)
stack.PushDouble(d)
}
// Convert long ... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/conversions/l2x.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 206 |
```go
package control
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Branch always
type GOTO struct{ base.BranchInstruction }
func (self *GOTO) Execute(frame *rtda.Frame) {
base.Branch(frame, self.Offset)
}
``` | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/control/goto.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 63 |
```go
package control
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
/*
tableswitch
<0-3 byte pad>
defaultbyte1
defaultbyte2
defaultbyte3
defaultbyte4
lowbyte1
lowbyte2
lowbyte3
lowbyte4
highbyte1
highbyte2
highbyte3
highbyte4
jump offsets...
*/
// Access jump table by index and jump
type TABLE_SWITCH... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/control/tableswitch.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 274 |
```go
package control
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
// Return void from method
type RETURN struct{ base.NoOperandsInstruction }
func (self *RETURN) Execute(frame *rtda.Frame) {
frame.Thread().PopFrame()
}
// Return reference from method
type ARETURN struct{ base.NoOperandsInstructi... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/control/return.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 454 |
```go
package control
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/rtda"
/*
lookupswitch
<0-3 byte pad>
defaultbyte1
defaultbyte2
defaultbyte3
defaultbyte4
npairs1
npairs2
npairs3
npairs4
match-offset pairs...
*/
// Access jump table by key match and jump
type LOOKUP_SWITCH struct {
defaultOffset int32
... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/instructions/control/lookupswitch.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 259 |
```go
package classfile
/*
field_info {
u2 access_flags;
u2 name_index;
u2 descriptor_index;
u2 attributes_count;
attribute_info attributes[attributes_count];
}
method_info {
u2 access_flags;
u2 name_index;
u2 ... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/member_info.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 438 |
```go
package classfile
/*
EnclosingMethod_attribute {
u2 attribute_name_index;
u4 attribute_length;
u2 class_index;
u2 method_index;
}
*/
type EnclosingMethodAttribute struct {
cp ConstantPool
classIndex uint16
methodIndex uint16
}
func (self *EnclosingMethodAttribute) readInfo(reader *C... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_enclosing_method.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 170 |
```go
package classfile
/*
CONSTANT_MethodHandle_info {
u1 tag;
u1 reference_kind;
u2 reference_index;
}
*/
type ConstantMethodHandleInfo struct {
referenceKind uint8
referenceIndex uint16
}
func (self *ConstantMethodHandleInfo) readInfo(reader *ClassReader) {
self.referenceKind = reader.readUint8()
... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/cp_invoke_dynamic.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 241 |
```go
package classfile
/*
BootstrapMethods_attribute {
u2 attribute_name_index;
u4 attribute_length;
u2 num_bootstrap_methods;
{ u2 bootstrap_method_ref;
u2 num_bootstrap_arguments;
u2 bootstrap_arguments[num_bootstrap_arguments];
} bootstrap_methods[num_bootstrap_methods];
}
*/
... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_bootstrap_methods.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 184 |
```go
package classfile
import "fmt"
type ConstantPool []ConstantInfo
func readConstantPool(reader *ClassReader) ConstantPool {
cpCount := int(reader.readUint16())
cp := make([]ConstantInfo, cpCount)
// The constant_pool table is indexed from 1 to constant_pool_count - 1.
for i := 1; i < cpCount; i++ {
cp[i] ... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/constant_pool.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 421 |
```go
package classfile
/*
Exceptions_attribute {
u2 attribute_name_index;
u4 attribute_length;
u2 number_of_exceptions;
u2 exception_index_table[number_of_exceptions];
}
*/
type ExceptionsAttribute struct {
exceptionIndexTable []uint16
}
func (self *ExceptionsAttribute) readInfo(reader *ClassReader)... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_exceptions.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 104 |
```go
package classfile
/*
CONSTANT_NameAndType_info {
u1 tag;
u2 name_index;
u2 descriptor_index;
}
*/
type ConstantNameAndTypeInfo struct {
nameIndex uint16
descriptorIndex uint16
}
func (self *ConstantNameAndTypeInfo) readInfo(reader *ClassReader) {
self.nameIndex = reader.readUint16()
self.d... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/cp_name_and_type.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 88 |
```go
package classfile
/*
LineNumberTable_attribute {
u2 attribute_name_index;
u4 attribute_length;
u2 line_number_table_length;
{ u2 start_pc;
u2 line_number;
} line_number_table[line_number_table_length];
}
*/
type LineNumberTableAttribute struct {
lineNumberTable []*LineNumberTableEn... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_line_number_table.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 255 |
```go
package classfile
/*
Deprecated_attribute {
u2 attribute_name_index;
u4 attribute_length;
}
*/
type DeprecatedAttribute struct {
MarkerAttribute
}
/*
Synthetic_attribute {
u2 attribute_name_index;
u4 attribute_length;
}
*/
type SyntheticAttribute struct {
MarkerAttribute
}
type MarkerAttribut... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_markers.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 90 |
```go
package classfile
/*
attribute_info {
u2 attribute_name_index;
u4 attribute_length;
u1 info[attribute_length];
}
*/
type UnparsedAttribute struct {
name string
length uint32
info []byte
}
func (self *UnparsedAttribute) readInfo(reader *ClassReader) {
self.info = reader.readBytes(self.length)... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_unparsed.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 96 |
```go
package classfile
/*
CONSTANT_Class_info {
u1 tag;
u2 name_index;
}
*/
type ConstantClassInfo struct {
cp ConstantPool
nameIndex uint16
}
func (self *ConstantClassInfo) readInfo(reader *ClassReader) {
self.nameIndex = reader.readUint16()
}
func (self *ConstantClassInfo) Name() string {
return... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/cp_class.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 90 |
```go
package classfile
// Constant pool tags
const (
CONSTANT_Class = 7
CONSTANT_Fieldref = 9
CONSTANT_Methodref = 10
CONSTANT_InterfaceMethodref = 11
CONSTANT_String = 8
CONSTANT_Integer = 3
CONSTANT_Float = 4
CONSTANT_Long = 5... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/constant_info.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 468 |
```go
package classfile
import "math"
/*
CONSTANT_Integer_info {
u1 tag;
u4 bytes;
}
*/
type ConstantIntegerInfo struct {
val int32
}
func (self *ConstantIntegerInfo) readInfo(reader *ClassReader) {
bytes := reader.readUint32()
self.val = int32(bytes)
}
func (self *ConstantIntegerInfo) Value() int32 {
re... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/cp_numeric.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 341 |
```go
package classfile
/*
SourceFile_attribute {
u2 attribute_name_index;
u4 attribute_length;
u2 sourcefile_index;
}
*/
type SourceFileAttribute struct {
cp ConstantPool
sourceFileIndex uint16
}
func (self *SourceFileAttribute) readInfo(reader *ClassReader) {
self.sourceFileIndex = reade... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_source_file.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 101 |
```go
package classfile
import "fmt"
/*
ClassFile {
u4 magic;
u2 minor_version;
u2 major_version;
u2 constant_pool_count;
cp_info constant_pool[constant_pool_count-1];
u2 access_flags;
u2 this_class;
u2 ... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/class_file.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 787 |
```go
package classfile
/*
ConstantValue_attribute {
u2 attribute_name_index;
u4 attribute_length;
u2 constantvalue_index;
}
*/
type ConstantValueAttribute struct {
constantValueIndex uint16
}
func (self *ConstantValueAttribute) readInfo(reader *ClassReader) {
self.constantValueIndex = reader.readUint16... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_constant_value.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 95 |
```go
package classfile
/*
LocalVariableTable_attribute {
u2 attribute_name_index;
u4 attribute_length;
u2 local_variable_table_length;
{ u2 start_pc;
u2 length;
u2 name_index;
u2 descriptor_index;
u2 index;
} local_variable_table[local_variable_table_length];
}
*/... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_local_variable_table.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 251 |
```go
package classfile
import "encoding/binary"
type ClassReader struct {
data []byte
}
// u1
func (self *ClassReader) readUint8() uint8 {
val := self.data[0]
self.data = self.data[1:]
return val
}
// u2
func (self *ClassReader) readUint16() uint16 {
val := binary.BigEndian.Uint16(self.data)
self.data = self... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/class_reader.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 262 |
```go
package classfile
/*
InnerClasses_attribute {
u2 attribute_name_index;
u4 attribute_length;
u2 number_of_classes;
{ u2 inner_class_info_index;
u2 outer_class_info_index;
u2 inner_name_index;
u2 inner_class_access_flags;
} classes[number_of_classes];
}
*/
type InnerCl... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_inner_classes.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 238 |
```go
package classfile
/*
Signature_attribute {
u2 attribute_name_index;
u4 attribute_length;
u2 signature_index;
}
*/
type SignatureAttribute struct {
cp ConstantPool
signatureIndex uint16
}
func (self *SignatureAttribute) readInfo(reader *ClassReader) {
self.signatureIndex = reader.readU... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_signature.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 94 |
```go
package classfile
import "fmt"
import "unicode/utf16"
/*
CONSTANT_Utf8_info {
u1 tag;
u2 length;
u1 bytes[length];
}
*/
type ConstantUtf8Info struct {
str string
}
func (self *ConstantUtf8Info) readInfo(reader *ClassReader) {
length := uint32(reader.readUint16())
bytes := reader.readBytes(length... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/cp_utf8.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 702 |
```go
package classfile
/*
Code_attribute {
u2 attribute_name_index;
u4 attribute_length;
u2 max_stack;
u2 max_locals;
u4 code_length;
u1 code[code_length];
u2 exception_table_length;
{ u2 start_pc;
u2 end_pc;
u2 handler_pc;
u2 catch_type;
} exception_table... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_code.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 524 |
```go
package classfile
/*
CONSTANT_Fieldref_info {
u1 tag;
u2 class_index;
u2 name_and_type_index;
}
CONSTANT_Methodref_info {
u1 tag;
u2 class_index;
u2 name_and_type_index;
}
CONSTANT_InterfaceMethodref_info {
u1 tag;
u2 class_index;
u2 name_and_type_index;
}
*/
type ConstantFiel... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/cp_member_ref.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 241 |
```go
package classfile
/*
CONSTANT_String_info {
u1 tag;
u2 string_index;
}
*/
type ConstantStringInfo struct {
cp ConstantPool
stringIndex uint16
}
func (self *ConstantStringInfo) readInfo(reader *ClassReader) {
self.stringIndex = reader.readUint16()
}
func (self *ConstantStringInfo) String() st... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/cp_string.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 90 |
```go
package classfile
var (
_attrDeprecated = &DeprecatedAttribute{}
_attrSynthetic = &SyntheticAttribute{}
)
/*
attribute_info {
u2 attribute_name_index;
u4 attribute_length;
u1 info[attribute_length];
}
*/
type AttributeInfo interface {
readInfo(reader *ClassReader)
}
func readAttributes(reader *... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attribute_info.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 496 |
```go
package native
import "jvmgo/ch09/rtda"
type NativeMethod func(frame *rtda.Frame)
var registry = map[string]NativeMethod{}
func emptyNativeMethod(frame *rtda.Frame) {
// do nothing
}
func Register(className, methodName, methodDescriptor string, method NativeMethod) {
key := className + "~" + methodName + "... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/native/registry.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 165 |
```go
package classfile
/*
LocalVariableTypeTable_attribute {
u2 attribute_name_index;
u4 attribute_length;
u2 local_variable_type_table_length;
{ u2 start_pc;
u2 length;
u2 name_index;
u2 signature_index;
u2 index;
} local_variable_type_table[local_variable_type_t... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/classfile/attr_local_variable_type_table.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 267 |
```go
package lang
import "jvmgo/ch09/native"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
const jlString = "java/lang/String"
func init() {
native.Register(jlString, "intern", "()Ljava/lang/String;", intern)
}
// public native String intern();
// ()Ljava/lang/String;
func intern(frame *rtda.Frame) {
th... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/native/java/lang/String.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 121 |
```go
package lang
import "unsafe"
import "jvmgo/ch09/native"
import "jvmgo/ch09/rtda"
const jlObject = "java/lang/Object"
func init() {
native.Register(jlObject, "getClass", "()Ljava/lang/Class;", getClass)
native.Register(jlObject, "hashCode", "()I", hashCode)
native.Register(jlObject, "clone", "()Ljava/lang/Ob... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/native/java/lang/Object.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 280 |
```go
package lang
import "jvmgo/ch09/native"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
const jlSystem = "java/lang/System"
func init() {
native.Register(jlSystem, "arraycopy", "(Ljava/lang/Object;ILjava/lang/Object;II)V", arraycopy)
}
// public static native void arraycopy(Object src, int srcPos, Obj... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/native/java/lang/System.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 360 |
```go
package lang
import "math"
import "jvmgo/ch09/native"
import "jvmgo/ch09/rtda"
const jlFloat = "java/lang/Float"
func init() {
native.Register(jlFloat, "floatToRawIntBits", "(F)I", floatToRawIntBits)
native.Register(jlFloat, "intBitsToFloat", "(I)F", intBitsToFloat)
}
// public static native int floatToRawI... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/native/java/lang/Float.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 225 |
```go
package lang
import "math"
import "jvmgo/ch09/native"
import "jvmgo/ch09/rtda"
const jlDouble = "java/lang/Double"
func init() {
native.Register(jlDouble, "doubleToRawLongBits", "(D)J", doubleToRawLongBits)
native.Register(jlDouble, "longBitsToDouble", "(J)D", longBitsToDouble)
}
// public static native lon... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/native/java/lang/Double.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 226 |
```go
package misc
import "jvmgo/ch09/instructions/base"
import "jvmgo/ch09/native"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
func init() {
native.Register("sun/misc/VM", "initialize", "()V", initialize)
}
// private static native void initialize();
// ()V
func initialize(frame *rtda.Frame) { // hack: ... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/native/sun/misc/VM.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 232 |
```go
package lang
import "jvmgo/ch09/native"
import "jvmgo/ch09/rtda"
import "jvmgo/ch09/rtda/heap"
const jlClass = "java/lang/Class"
func init() {
native.Register(jlClass, "getPrimitiveClass", "(Ljava/lang/String;)Ljava/lang/Class;", getPrimitiveClass)
native.Register(jlClass, "getName0", "()Ljava/lang/String;",... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/native/java/lang/Class.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 483 |
```go
package rtda
import "jvmgo/ch09/rtda/heap"
/*
JVM
Thread
pc
Stack
Frame
LocalVars
OperandStack
*/
type Thread struct {
pc int // the address of the instruction currently being executed
stack *Stack
// todo
}
func NewThread() *Thread {
return &Thread{
stack: newStack(102... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/thread.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 241 |
```go
package rtda
import "math"
import "jvmgo/ch09/rtda/heap"
type OperandStack struct {
size uint
slots []Slot
}
func newOperandStack(maxStack uint) *OperandStack {
if maxStack > 0 {
return &OperandStack{
slots: make([]Slot, maxStack),
}
}
return nil
}
func (self *OperandStack) PushInt(val int32) {
... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/operand_stack.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 606 |
```go
package rtda
import "math"
import "jvmgo/ch09/rtda/heap"
type LocalVars []Slot
func newLocalVars(maxLocals uint) LocalVars {
if maxLocals > 0 {
return make([]Slot, maxLocals)
}
return nil
}
func (self LocalVars) SetInt(index uint, val int32) {
self[index].num = val
}
func (self LocalVars) GetInt(index u... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/local_vars.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 436 |
```go
package rtda
import "jvmgo/ch09/rtda/heap"
type Slot struct {
num int32
ref *heap.Object
}
``` | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/slot.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 33 |
```go
package rtda
import "jvmgo/ch09/rtda/heap"
// stack frame
type Frame struct {
lower *Frame // stack is implemented as linked list
localVars LocalVars
operandStack *OperandStack
thread *Thread
method *heap.Method
nextPC int // the next instruction after the call
}
func newFrame... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/frame.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 272 |
```go
package rtda
// jvm stack
type Stack struct {
maxSize uint
size uint
_top *Frame // stack is implemented as linked list
}
func newStack(maxSize uint) *Stack {
return &Stack{
maxSize: maxSize,
}
}
func (self *Stack) push(frame *Frame) {
if self.size >= self.maxSize {
panic("java.lang.StackOverfl... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/jvm_stack.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 225 |
```go
package heap
// symbolic reference
type SymRef struct {
cp *ConstantPool
className string
class *Class
}
func (self *SymRef) ResolvedClass() *Class {
if self.class == nil {
self.resolveClassRef()
}
return self.class
}
// jvms8 5.4.3.1
func (self *SymRef) resolveClassRef() {
d := self.cp.cla... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/cp_symref.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 129 |
```go
package heap
import "jvmgo/ch09/classfile"
type MethodRef struct {
MemberRef
method *Method
}
func newMethodRef(cp *ConstantPool, refInfo *classfile.ConstantMethodrefInfo) *MethodRef {
ref := &MethodRef{}
ref.cp = cp
ref.copyMemberRefInfo(&refInfo.ConstantMemberrefInfo)
return ref
}
func (self *MethodRe... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/cp_methodref.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 277 |
```go
package heap
import "fmt"
import "jvmgo/ch09/classfile"
type Constant interface{}
type ConstantPool struct {
class *Class
consts []Constant
}
func newConstantPool(class *Class, cfCp classfile.ConstantPool) *ConstantPool {
cpCount := len(cfCp)
consts := make([]Constant, cpCount)
rtCp := &ConstantPool{cla... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/constant_pool.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 517 |
```go
package heap
import "strings"
import "jvmgo/ch09/classfile"
// name, superClassName and interfaceNames are all binary names(jvms8-4.2.1)
type Class struct {
accessFlags uint16
name string // thisClassName
superClassName string
interfaceNames []string
constantPool *ConstantPool... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/class.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 1,167 |
```go
package heap
import "jvmgo/ch09/classfile"
type FieldRef struct {
MemberRef
field *Field
}
func newFieldRef(cp *ConstantPool, refInfo *classfile.ConstantFieldrefInfo) *FieldRef {
ref := &FieldRef{}
ref.cp = cp
ref.copyMemberRefInfo(&refInfo.ConstantMemberrefInfo)
return ref
}
func (self *FieldRef) Resol... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/cp_fieldref.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 308 |
```go
package heap
// jvms8 6.5.instanceof
// jvms8 6.5.checkcast
func (self *Class) isAssignableFrom(other *Class) bool {
s, t := other, self
if s == t {
return true
}
if !s.IsArray() {
if !s.IsInterface() {
// s is class
if !t.IsInterface() {
// t is not interface
return s.IsSubClassOf(t)
... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/class_hierarchy.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 568 |
```go
package heap
import "jvmgo/ch09/classfile"
type ClassRef struct {
SymRef
}
func newClassRef(cp *ConstantPool, classInfo *classfile.ConstantClassInfo) *ClassRef {
ref := &ClassRef{}
ref.cp = cp
ref.className = classInfo.Name()
return ref
}
``` | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/cp_classref.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 68 |
```go
package heap
import "strings"
type MethodDescriptorParser struct {
raw string
offset int
parsed *MethodDescriptor
}
func parseMethodDescriptor(descriptor string) *MethodDescriptor {
parser := &MethodDescriptorParser{}
return parser.parse(descriptor)
}
func (self *MethodDescriptorParser) parse(descript... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/method_descriptor_parser.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 675 |
```go
package heap
import "jvmgo/ch09/classfile"
type ClassMember struct {
accessFlags uint16
name string
descriptor string
class *Class
}
func (self *ClassMember) copyMemberInfo(memberInfo *classfile.MemberInfo) {
self.accessFlags = memberInfo.AccessFlags()
self.name = memberInfo.Name()
self.de... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/class_member.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 387 |
```go
package heap
import "unicode/utf16"
var internedStrings = map[string]*Object{}
// todo
// go string -> java.lang.String
func JString(loader *ClassLoader, goStr string) *Object {
if internedStr, ok := internedStrings[goStr]; ok {
return internedStr
}
chars := stringToUtf16(goStr)
jChars := &Object{loader... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/string_pool.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 342 |
```go
package heap
var primitiveTypes = map[string]string{
"void": "V",
"boolean": "Z",
"byte": "B",
"short": "S",
"int": "I",
"long": "J",
"char": "C",
"float": "F",
"double": "D",
}
// [XXX -> [[XXX
// int -> [I
// XXX -> [LXXX;
func getArrayClassName(className string) string {
return... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/class_name_helper.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 387 |
```go
package heap
type Object struct {
class *Class
data interface{} // Slots for Object, []int32 for int[] ...
extra interface{}
}
// create normal (non-array) object
func newObject(class *Class) *Object {
return &Object{
class: class,
data: newSlots(class.instanceSlotCount),
}
}
// getters & setters
fu... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/object.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 266 |
```go
package heap
import "jvmgo/ch09/classfile"
type MemberRef struct {
SymRef
name string
descriptor string
}
func (self *MemberRef) copyMemberRefInfo(refInfo *classfile.ConstantMemberrefInfo) {
self.className = refInfo.ClassName()
self.name, self.descriptor = refInfo.NameAndDescriptor()
}
func (self *... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/cp_memberref.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 107 |
```go
package heap
type MethodDescriptor struct {
parameterTypes []string
returnType string
}
func (self *MethodDescriptor) addParameterType(t string) {
pLen := len(self.parameterTypes)
if pLen == cap(self.parameterTypes) {
s := make([]string, pLen, pLen+4)
copy(s, self.parameterTypes)
self.parameterTyp... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/method_descriptor.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 97 |
```go
package heap
import "jvmgo/ch09/classfile"
type Method struct {
ClassMember
maxStack uint
maxLocals uint
code []byte
argSlotCount uint
}
func newMethods(class *Class, cfMethods []*classfile.MemberInfo) []*Method {
methods := make([]*Method, len(cfMethods))
for i, cfMethod := range cfMetho... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/method.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 720 |
```go
package heap
const (
ACC_PUBLIC = 0x0001 // class field method
ACC_PRIVATE = 0x0002 // field method
ACC_PROTECTED = 0x0004 // field method
ACC_STATIC = 0x0008 // field method
ACC_FINAL = 0x0010 // class field method
ACC_SUPER = 0x0020 // class
ACC_SYNCHR... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/access_flags.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 278 |
```go
package heap
func LookupMethodInClass(class *Class, name, descriptor string) *Method {
for c := class; c != nil; c = c.superClass {
for _, method := range c.methods {
if method.name == name && method.descriptor == descriptor {
return method
}
}
}
return nil
}
func lookupMethodInInterfaces(iface... | /content/code_sandbox/v1/code/go/src/jvmgo/ch09/rtda/heap/method_lookup.go | go | 2016-01-06T13:13:45 | 2024-08-16T13:42:58 | jvmgo-book | zxh0/jvmgo-book | 1,605 | 164 |
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