{"record":{"id":"75108ca68d224da0","repo":"go-delve/delve","slug":"procstat-getprocs-failed-v","errorCode":null,"errorMessage":"procstat_getprocs failed: %v","messagePattern":"procstat_getprocs failed: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/proc/native/proc_freebsd.go","lineNumber":593,"sourceCode":"\t\tfor _, th := range dbp.threads {\n\t\t\tptraceResume(th.ID)\n\t\t}\n\t}\n\treturn ptraceDetach(dbp.pid)\n}\n\n// EntryPoint returns the entry point address of the process.\nfunc (dbp *nativeProcess) EntryPoint() (uint64, error) {\n\tps, err := C.procstat_open_sysctl()\n\tif err != nil {\n\t\treturn 0, fmt.Errorf(\"procstat_open_sysctl failed: %v\", err)\n\t}\n\tdefer C.procstat_close(ps)\n\n\tvar count C.uint\n\tkipp, err := C.procstat_getprocs(ps, C.KERN_PROC_PID, C.int(dbp.pid), &count)\n\tif err != nil {\n\t\treturn 0, fmt.Errorf(\"procstat_getprocs failed: %v\", err)\n\t}\n\tdefer C.procstat_freeprocs(ps, kipp)\n\tif count == 0 {\n\t\treturn 0, errors.New(\"procstat_getprocs returned no processes\")\n\t}\n\n\tauxv, err := C.procstat_getauxv(ps, kipp, &count)\n\tif err != nil {\n\t\treturn 0, fmt.Errorf(\"procstat_getauxv failed: %v\", err)\n\t}\n\tdefer C.procstat_freeauxv(ps, auxv)\n\n\tfor i := 0; i < int(count); i++ {\n\t\tif auxv.a_type == C.AT_ENTRY {\n\t\t\treturn uint64(C.elf_aux_info_ptr(auxv)), nil\n\t\t}\n\t\tauxv = (*C.Elf_Auxinfo)(unsafe.Pointer(uintptr(unsafe.Pointer(auxv)) + unsafe.Sizeof(*auxv)))\n\t}","sourceCodeStart":575,"sourceCodeEnd":611,"githubUrl":"https://github.com/go-delve/delve/blob/a23773e6c31361e43246bc43a424ee009679b174/pkg/proc/native/proc_freebsd.go#L575-L611","documentation":"Inside EntryPoint on FreeBSD, procstat_getprocs(ps, KERN_PROC_PID, pid, &count) failed to fetch the process's kinfo_proc entries for the debugged pid. Delve needs this record before querying the auxiliary vector, so it aborts with this error.","triggerScenarios":"procstat_getprocs returns non-zero when EntryPoint runs — the pid does not exist anymore, is not visible to the calling user, or the procstat handle is invalid.","commonSituations":"Target exited before EntryPoint was called (race with process death); running in a jail or as an unprivileged user who cannot see the target's process record; pid reuse confusion in scripts that parse the error.","solutions":["Confirm the target is still alive (ps -p <pid>) before calling APIs that need process metadata.","Re-run delve as root or the same user as the target if visibility is the issue.","Retry quickly: if this was a race with process exit, catch ErrProcessExited-style conditions and handle the dead target.","Update FreeBSD/libprocstat if getprocs fails for a valid, visible pid."],"exampleFix":"// before\nep, err := proc.EntryPoint() // procstat_getprocs failed: no such process\n\n// after\nif proc.Exited() {\n    return // target already gone, skip entry-point lookup\n}\nep, err := proc.EntryPoint()","handlingStrategy":"validation","validationCode":"// check target liveness and visibility before EntryPoint\nfunc pidVisible(pid int) bool {\n    return exec.Command(\"procstat\", strconv.Itoa(pid)).Run() == nil\n}","typeGuard":null,"tryCatchPattern":"if !pidVisible(pid) { return ErrTargetGone }\nep, err := proc.EntryPoint()\nif err != nil && strings.Contains(err.Error(), \"procstat_getprocs failed\") {\n    return fmt.Errorf(\"target %d exited during entry-point lookup\", pid)\n}","preventionTips":["Check the process is alive (procstat -p <pid>) before calling metadata APIs.","Match debugger and target users to avoid visibility failures.","Handle races with process exit explicitly in long-running tooling.","Avoid jails/restricted environments when querying kernel process records."],"tags":["freebsd","procstat","entry-point","process-lifetime"],"backgroundTag":"procstat-getprocs-failed","analyzedSha":"a23773e6c31361e43246bc43a424ee009679b174","analyzedAt":"2026-08-31T15:12:45.221Z","schemaVersion":2},"datasetVersion":"2026-08-31T19:17:28.585Z"}