{"record":{"id":"854aeadb33446deb","repo":"go-delve/delve","slug":"qmemoryregioninfo-response-wrapped-around-the-addr","errorCode":null,"errorMessage":"qMemoryRegionInfo response wrapped around the address space or stuck","messagePattern":"qMemoryRegionInfo response wrapped around the address space or stuck","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/proc/gdbserial/gdbserver.go","lineNumber":1644,"sourceCode":"\tif err != nil {\n\t\treturn nil, err\n\t}\n\tbuf := &bytes.Buffer{}\n\tbuf.Write(op)\n\tbinary.Write(buf, binary.LittleEndian, uint32(offset))\n\treturn buf.Bytes(), nil\n}\n\nfunc (p *gdbProcess) MemoryMap() ([]proc.MemoryMapEntry, error) {\n\tr := []proc.MemoryMapEntry{}\n\taddr := uint64(0)\n\tfor addr != ^uint64(0) {\n\t\tmri, err := p.conn.memoryRegionInfo(addr)\n\t\tif err != nil {\n\t\t\treturn nil, err\n\t\t}\n\t\tif addr+mri.size <= addr {\n\t\t\treturn nil, errors.New(\"qMemoryRegionInfo response wrapped around the address space or stuck\")\n\t\t}\n\t\tif mri.permissions != \"\" {\n\t\t\tvar mme proc.MemoryMapEntry\n\n\t\t\tmme.Addr = addr\n\t\t\tmme.Size = mri.size\n\t\t\tmme.Read = strings.Contains(mri.permissions, \"r\")\n\t\t\tmme.Write = strings.Contains(mri.permissions, \"w\")\n\t\t\tmme.Exec = strings.Contains(mri.permissions, \"x\")\n\n\t\t\tr = append(r, mme)\n\t\t}\n\t\taddr += mri.size\n\t}\n\treturn r, nil\n}\n\nfunc (p *gdbProcess) DumpProcessNotes(notes []elfwriter.Note, threadDone func()) (threadsDone bool, out []elfwriter.Note, err error) {","sourceCodeStart":1626,"sourceCodeEnd":1662,"githubUrl":"https://github.com/go-delve/delve/blob/a23773e6c31361e43246bc43a424ee009679b174/pkg/proc/gdbserial/gdbserver.go#L1626-L1662","documentation":"When building the memory map, delve walks the address space with repeated qMemoryRegionInfo queries. If the returned region size does not advance the address (addr+mri.size wraps or stays <= addr), the walk would never terminate, so this error is returned.","triggerScenarios":"Calling gdbProcess.MemoryMap when the debug stub returns a malformed qMemoryRegionInfo packet whose size is 0 or causes uint64 overflow for the queried address.","commonSituations":"Non-conforming or buggy GDB stubs, lldb-server/rr protocol quirks, or corrupted responses on unusual memory layouts (e.g. top-of-address-space mappings).","solutions":["Update lldb-server/rr/stub to a version with correct qMemoryRegionInfo handling.","Test with the native backend (dlv exec --backend=native) to confirm the stub is the problem.","File a bug with the delve project including the stub name/version and wire log (--log-output=dewire).","Work around by using OS tools (e.g. /proc/<pid>/maps, vmmap) to inspect the memory map."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"mm, err := p.MemoryMap()\nif err != nil && strings.Contains(err.Error(), \"qMemoryRegionInfo\") {\n    // stub misbehaves; fall back to /proc/<pid>/maps or OS tooling\n}","preventionTips":["Keep lldb-server/rr updated to protocol-conforming versions.","Sanity-check stub behavior with the native backend when memory maps look wrong.","Capture wire logs (--log-output=dewire) when filing bugs."],"tags":["gdbserial","memory-map","protocol","qmemoryregioninfo"],"backgroundTag":"malformed-debugger-protocol-response","analyzedSha":"a23773e6c31361e43246bc43a424ee009679b174","analyzedAt":"2026-08-31T15:12:45.221Z","schemaVersion":2},"datasetVersion":"2026-08-31T19:17:28.585Z"}