145 lines
3.5 KiB
Go
145 lines
3.5 KiB
Go
//go:build darwin && macnative
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package native
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// #include "threads_darwin.h"
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// #include "proc_darwin.h"
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import "C"
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import (
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"errors"
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"fmt"
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"unsafe"
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sys "golang.org/x/sys/unix"
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"github.com/go-delve/delve/pkg/proc"
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"github.com/go-delve/delve/pkg/proc/amd64util"
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)
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// waitStatus is a synonym for the platform-specific WaitStatus
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type waitStatus sys.WaitStatus
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// osSpecificDetails holds information specific to the OSX/Darwin
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// operating system / kernel.
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type osSpecificDetails struct {
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threadAct C.thread_act_t
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registers C.x86_thread_state64_t
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exists bool
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}
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// ErrContinueThread is the error returned when a thread could not
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// be continued.
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var ErrContinueThread = fmt.Errorf("could not continue thread")
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func (t *nativeThread) stop() (err error) {
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kret := C.thread_suspend(t.os.threadAct)
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if kret != C.KERN_SUCCESS {
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errStr := C.GoString(C.mach_error_string(C.mach_error_t(kret)))
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// check that the thread still exists before complaining
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err2 := t.dbp.updateThreadList()
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if err2 != nil {
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err = fmt.Errorf("could not suspend thread %d %s (additionally could not update thread list: %v)", t.ID, errStr, err2)
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return
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}
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if _, ok := t.dbp.threads[t.ID]; ok {
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err = fmt.Errorf("could not suspend thread %d %s", t.ID, errStr)
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return
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}
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}
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return
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}
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func (procgrp *processGroup) singleStep(t *nativeThread) error {
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kret := C.single_step(t.os.threadAct)
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if kret != C.KERN_SUCCESS {
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return fmt.Errorf("could not single step")
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}
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for {
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twthread, err := t.dbp.trapWait(t.dbp.pid)
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if err != nil {
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return err
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}
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if twthread.ID == t.ID {
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break
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}
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}
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kret = C.clear_trap_flag(t.os.threadAct)
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if kret != C.KERN_SUCCESS {
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return fmt.Errorf("could not clear CPU trap flag")
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}
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return nil
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}
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func (t *nativeThread) resume() error {
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// TODO(dp) set flag for ptrace stops
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var err error
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t.dbp.execPtraceFunc(func() { err = ptraceCont(t.dbp.pid, 0) })
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if err == nil {
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return nil
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}
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kret := C.resume_thread(t.os.threadAct)
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if kret != C.KERN_SUCCESS {
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return ErrContinueThread
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}
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return nil
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}
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// Stopped returns whether the thread is stopped at
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// the operating system level.
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func (t *nativeThread) Stopped() bool {
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return C.thread_blocked(t.os.threadAct) > C.int(0)
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}
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func (t *nativeThread) WriteMemory(addr uint64, data []byte) (int, error) {
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if t.dbp.exited {
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return 0, proc.ErrProcessExited{Pid: t.dbp.pid}
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}
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if len(data) == 0 {
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return 0, nil
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}
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var (
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vmData = unsafe.Pointer(&data[0])
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vmAddr = C.mach_vm_address_t(addr)
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length = C.mach_msg_type_number_t(len(data))
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)
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if ret := C.write_memory(t.dbp.os.task, vmAddr, vmData, length); ret < 0 {
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return 0, fmt.Errorf("could not write memory")
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}
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return len(data), nil
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}
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func (t *nativeThread) ReadMemory(buf []byte, addr uint64) (int, error) {
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if t.dbp.exited {
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return 0, proc.ErrProcessExited{Pid: t.dbp.pid}
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}
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if len(buf) == 0 {
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return 0, nil
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}
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var (
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vmData = unsafe.Pointer(&buf[0])
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vmAddr = C.mach_vm_address_t(addr)
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length = C.mach_msg_type_number_t(len(buf))
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)
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ret := C.read_memory(t.dbp.os.task, vmAddr, vmData, length)
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if ret < 0 {
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return 0, fmt.Errorf("could not read memory")
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}
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return len(buf), nil
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}
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func (t *nativeThread) restoreRegisters(sr proc.Registers) error {
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return errors.New("not implemented")
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}
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func (t *nativeThread) withDebugRegisters(f func(*amd64util.DebugRegisters) error) error {
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return proc.ErrHWBreakUnsupported
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}
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// SoftExc returns true if this thread received a software exception during the last resume.
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func (t *nativeThread) SoftExc() bool {
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return false
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}
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