1418cfd385
This commit improves the handling of hardcoded breakpoints in Delve. A hardcoded breakpoint is a breakpoint instruction hardcoded in the text of the program, for example through runtime.Breakpoint. 1. hardcoded breakpoints are now indicated by setting the breakpoint field on any thread stopped by a hardcoded breakpoint 2. if multiple hardcoded breakpoints are hit during a single stop all will be notified to the user. 3. a debugger breakpoint with an unmet condition can't hide a hardcoded breakpoint anymore.
133 lines
3.3 KiB
Go
133 lines
3.3 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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"syscall"
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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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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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var restoreRegistersErr error
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t.dbp.execPtraceFunc(func() {
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restoreRegistersErr = sys.PtraceSetRegs(t.ID, (*sys.Reg)(sr.Regs))
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if restoreRegistersErr != nil {
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return
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}
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if sr.Fpregset.Xsave != nil {
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iov := sys.Iovec{Base: &sr.Fpregset.Xsave[0], Len: uint64(len(sr.Fpregset.Xsave))}
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_, _, restoreRegistersErr = syscall.Syscall6(syscall.SYS_PTRACE, sys.PTRACE_SETREGS, uintptr(t.ID), uintptr(unsafe.Pointer(&iov)), 0, 0, 0)
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return
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}
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_, _, restoreRegistersErr = syscall.Syscall6(syscall.SYS_PTRACE, sys.PTRACE_SETFPREGS, uintptr(t.ID), uintptr(unsafe.Pointer(&sr.Fpregset.AMD64PtraceFpRegs)), 0, 0, 0)
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return
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})
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if restoreRegistersErr == syscall.Errno(0) {
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restoreRegistersErr = nil
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}
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return restoreRegistersErr
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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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