9c5777e762
* pkg/proc: convert freebsd ptrace code to cgo There is little point in having cgo call a custom C function, when the same can be done directly from cgo (with less code and effort). Split the amd64 specific code into ptrace_freebsd_amd64.go. Also avoid mixing C.ptrace() with syscall.SYS_PTRACE. This will make further changes easier - no functional change intended. * pkg/proc: check return values of ptrace calls on freebsd The return values of the PT_GETNUMLWPS and PT_GETLWPLIST ptrace calls were previously unchecked. While these should not fail, panic instead of using -1 with slice allocation/handling. * pkg/proc: return *amd64util.AMD64Xstate from freebsd ptraceGetRegset Return a pointer to a struct, rather than a struct - this simplifies the code in both the caller and the ptraceGetRegset function, while also avoiding struct copying. * pkg/proc: fix floating point register setting on freebsd The original code could never work - PT_SETREGS on freebsd does not take an iovec, nor does it set FP registers. Furthermore, the xsave bytes were not stored in the amd64util.AMD64Xstate struct. Updates #3001 * pkg/proc: re-enable function call injection on freebsd Floating point registers can now be set and restored correctly. This is a partial revert of 51090f003bace1f8cc37b8480ffdb6f6cc91fa5a. Fixes #3001 * pkg/proc: deduplicate register setting code on freebsd
113 lines
2.6 KiB
Go
113 lines
2.6 KiB
Go
package native
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// #include <sys/thr.h>
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import "C"
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import (
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"fmt"
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"github.com/go-delve/delve/pkg/proc/fbsdutil"
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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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type waitStatus sys.WaitStatus
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// osSpecificDetails hold FreeBSD specific process details.
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type osSpecificDetails struct {
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registers sys.Reg
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}
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func (t *nativeThread) stop() (err error) {
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_, err = C.thr_kill2(C.pid_t(t.dbp.pid), C.long(t.ID), C.int(sys.SIGSTOP))
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if err != nil {
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err = fmt.Errorf("stop err %s on thread %d", err, t.ID)
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return
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}
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// If the process is stopped, we must continue it so it can receive the
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// signal
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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 err
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}
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_, _, err = t.dbp.waitFast(t.dbp.pid)
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if err != nil {
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err = fmt.Errorf("wait err %s on thread %d", err, t.ID)
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return
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}
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return
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}
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func (t *nativeThread) Stopped() bool {
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state := status(t.dbp.pid)
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return state == statusStopped
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}
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func (t *nativeThread) resume() error {
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return t.resumeWithSig(0)
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}
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func (t *nativeThread) resumeWithSig(sig int) (err error) {
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t.dbp.execPtraceFunc(func() { err = ptraceCont(t.ID, sig) })
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return
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}
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func (t *nativeThread) singleStep() (err error) {
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t.dbp.execPtraceFunc(func() { err = ptraceSingleStep(t.ID) })
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if err != nil {
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return err
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}
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for {
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th, 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 th.ID == t.ID {
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break
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}
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t.dbp.execPtraceFunc(func() { err = ptraceCont(th.ID, 0) })
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if err != nil {
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return err
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}
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}
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return nil
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}
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func (t *nativeThread) restoreRegisters(savedRegs proc.Registers) error {
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sr := savedRegs.(*fbsdutil.AMD64Registers)
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return setRegisters(t, sr, true)
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}
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func (t *nativeThread) WriteMemory(addr uint64, data []byte) (written int, err 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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t.dbp.execPtraceFunc(func() { written, err = ptraceWriteData(t.ID, uintptr(addr), data) })
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return written, err
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}
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func (t *nativeThread) ReadMemory(data []byte, addr uint64) (n int, err 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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t.dbp.execPtraceFunc(func() { n, err = ptraceReadData(t.ID, uintptr(addr), data) })
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return n, err
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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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