{"record":{"id":"de76367e16493d6d","repo":"go-delve/delve","slug":"memorymap-not-supported","errorCode":null,"errorMessage":"MemoryMap not supported","messagePattern":"MemoryMap not supported","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"info","filePath":"pkg/proc/dump.go","lineNumber":17,"sourceCode":"package proc\n\nimport (\n\t\"bytes\"\n\t\"debug/elf\"\n\t\"encoding/binary\"\n\t\"errors\"\n\t\"fmt\"\n\t\"runtime\"\n\t\"sync\"\n\n\t\"github.com/go-delve/delve/pkg/elfwriter\"\n\t\"github.com/go-delve/delve/pkg/version\"\n)\n\nvar (\n\tErrMemoryMapNotSupported = errors.New(\"MemoryMap not supported\")\n)\n\n// DumpState represents the current state of a core dump in progress.\ntype DumpState struct {\n\tMutex sync.Mutex\n\n\tDumping  bool\n\tAllDone  bool\n\tCanceled bool\n\tDoneChan chan struct{}\n\n\tThreadsDone, ThreadsTotal int\n\tMemDone, MemTotal         uint64\n\n\tErr error\n}\n\n// DumpFlags is used to configure (*Target).Dump","sourceCodeStart":1,"sourceCodeEnd":35,"githubUrl":"https://github.com/go-delve/delve/blob/a23773e6c31361e43246bc43a424ee009679b174/pkg/proc/dump.go#L1-L35","documentation":"ErrMemoryMapNotSupported (pkg/proc/dump.go:17) is returned by the MemoryMap API when the active backend cannot enumerate memory regions. Core-dump backends that lack region metadata (or backends like gdbserial/live targets where the map is unavailable) return this sentinel instead of a map.","triggerScenarios":"Calling MemoryMap (or the rpc2 equivalent, e.g. 'info mem'-style clients) on a process whose backend does not implement memory-map enumeration, such as certain core dump or minidump opens.","commonSituations":"Tooling that queries the memory map for address-validity heuristics against a minidump; scripts that work on Linux live targets then run against core files; IDE memory-map panels opened in a core session.","solutions":["Handle the sentinel with errors.Is(err, proc.ErrMemoryMapNotSupported) and skip address-range validation.","Derive memory regions from the ELF program headers of the core file yourself (readelf -l core).","Use a live debug session or a full Linux core (not a reduced minidump) if the memory map is required.","Check your delve version/backend; some backends may add MemoryMap support in newer releases."],"exampleFix":"// before\nregions, err := proc.MemoryMap(...) // panic-free but breaks on minidumps\n\n// after\nregions, err := proc.MemoryMap(...)\nif errors.Is(err, proc.ErrMemoryMapNotSupported) {\n    regions = parsePTLoad(coreFile) // fall back to ELF headers\n}","handlingStrategy":"fallback","validationCode":"_, err := proc0.MemoryMap()\nmemMapOK := !errors.Is(err, proc.ErrMemoryMapNotSupported)","typeGuard":"func memoryMapSupported(err error) bool { return !errors.Is(err, proc.ErrMemoryMapNotSupported) }","tryCatchPattern":"regions, err := p.MemoryMap()\nif errors.Is(err, proc.ErrMemoryMapNotSupported) {\n    regions = regionsFromPTLoad(coreFile) // derive from ELF headers\n}","preventionTips":["Feature-detect MemoryMap support once at session start.","Parse the core's ELF program headers as a region source alternative.","Avoid address-range validation logic that assumes a memory map exists.","Use full Linux cores rather than reduced minidumps when region info matters."],"tags":["memory-map","core-dump","go","delve"],"backgroundTag":"feature-not-supported-by-backend","analyzedSha":"a23773e6c31361e43246bc43a424ee009679b174","analyzedAt":"2026-08-31T15:12:45.221Z","schemaVersion":2},"datasetVersion":"2026-08-31T19:17:28.585Z"}