object

Documentation

Overview

Package object contains ObjectMapper implementations.

Index

• func FindCallSite(a []CallSite, retAddr uint32) (i int, found bool)
• type CallMap
  • func (m *CallMap) FindCall(retAddr uint32) (init bool, funcIndex, callIndex int, stackOffset int32, retOffset uint32)
  • func (m *CallMap) InitObjectMap(numImportFuncs, numOtherFuncs int)
  • func (m *CallMap) PutCallSite(retAddr uint32, stackOffset int32)
• type CallSite
• type FuncMap
  • func (m *FuncMap) FindCall(retAddr uint32) (init bool, funcIndex, callIndex int, stackOffset int32, retOffset uint32)
  • func (m *FuncMap) FindFunc(addr uint32) (index int, found bool)
  • func (m *FuncMap) InitObjectMap(numImportFuncs, numOtherFuncs int)
  • func (*FuncMap) PutCallSite(uint32, int32)
  • func (m *FuncMap) PutFuncAddr(addr uint32)

Functions

func FindCallSite

func FindCallSite(a []CallSite, retAddr uint32) (i int, found bool)

Types

type CallMap

type CallMap struct {
	FuncMap
	CallSites []CallSite
}

CallMap implements compile.ObjectMapper. It stores function addresses, and sites of function calls, suspension points and traps. Instruction information is not stored.

Initial CallSites capacity may be allocated by initializing the field with a non-nil, empty array.

func (*CallMap) FindCall

func (m *CallMap) FindCall(retAddr uint32) (init bool, funcIndex, callIndex int, stackOffset int32, retOffset uint32)

func (*CallMap) InitObjectMap

func (m *CallMap) InitObjectMap(numImportFuncs, numOtherFuncs int)

func (*CallMap) PutCallSite

func (m *CallMap) PutCallSite(retAddr uint32, stackOffset int32)

type CallSite

type CallSite struct {
	RetAddr     uint32 // The address immediately after the call instruction
	StackOffset int32  // Calling function's stack usage at time of call
}

CallSite represents an offset within the text section (machine code) where a function call is made.

The struct size or layout will not change between minor versions.

type FuncMap

type FuncMap struct {
	FuncAddrs []uint32
}

FuncMap implements compile.ObjectMapper. It stores function addresses, but no call, trap or instruction information.

FuncAddrs may be preallocated by initializing the field with a non-nil, empty array.

func (*FuncMap) FindCall

func (m *FuncMap) FindCall(retAddr uint32) (init bool, funcIndex, callIndex int, stackOffset int32, retOffset uint32)

func (*FuncMap) FindFunc

func (m *FuncMap) FindFunc(addr uint32) (index int, found bool)

func (*FuncMap) InitObjectMap

func (m *FuncMap) InitObjectMap(numImportFuncs, numOtherFuncs int)

func (*FuncMap) PutCallSite

func (*FuncMap) PutCallSite(uint32, int32)

func (*FuncMap) PutFuncAddr

func (m *FuncMap) PutFuncAddr(addr uint32)