diff options
Diffstat (limited to 'lib/observer/src/crashdump_viewer.erl')
| -rw-r--r-- | lib/observer/src/crashdump_viewer.erl | 187 |
1 files changed, 159 insertions, 28 deletions
diff --git a/lib/observer/src/crashdump_viewer.erl b/lib/observer/src/crashdump_viewer.erl index 95e12887cd..40450a2873 100644 --- a/lib/observer/src/crashdump_viewer.erl +++ b/lib/observer/src/crashdump_viewer.erl @@ -26,10 +26,25 @@ %% Tables %% ------ %% cdv_dump_index_table: This table holds all tags read from the -%% crashdump. Each tag indicates where the information about a -%% specific item starts. The table entry for a tag includes the start -%% position for this item-information. In a crash dump file, all tags -%% start with a "=" at the beginning of a line. +%% crashdump, except the 'binary' tag. Each tag indicates where the +%% information about a specific item starts. The table entry for a +%% tag includes the start position for this item-information. In a +%% crash dump file, all tags start with a "=" at the beginning of a +%% line. +%% +%% cdv_binary_index_table: This table holds all 'binary' tags. The hex +%% address for each binary is converted to its integer value before +%% storing Address -> Start Position in this table. The hex value of +%% the address is never used for lookup. +%% +%% cdv_reg_proc_table: This table holds mappings between pid and +%% registered name. This is used for timers and monitors. +%% +%% cdv_heap_file_chars: For each 'proc_heap' and 'literals' tag, this +%% table contains the number of characters to read from the crash dump +%% file. This is used for giving an indication in percent of the +%% progress when parsing this data. +%% %% %% Process state %% ------------- @@ -73,6 +88,9 @@ -export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]). +%% Test support +-export([get_dump_versions/0]). + %% Debug support -export([debug/1,stop_debug/0]). @@ -87,6 +105,7 @@ % line_head/1 function can return -define(not_available,"N/A"). -define(binary_size_progress_limit,10000). +-define(max_dump_version,[0,4]). %% All possible tags - use macros in order to avoid misspelling in the code @@ -104,6 +123,7 @@ -define(index_table,index_table). -define(instr_data,instr_data). -define(internal_ets,internal_ets). +-define(literals,literals). -define(loaded_modules,loaded_modules). -define(memory,memory). -define(memory_map,memory_map). @@ -293,6 +313,11 @@ port(Id) -> expand_binary(Pos) -> call({expand_binary,Pos}). +%%%----------------------------------------------------------------- +%%% For testing only - called from crashdump_viewer_SUITE +get_dump_versions() -> + call(get_dump_versions). + %%==================================================================== %% Server functions %%==================================================================== @@ -454,8 +479,9 @@ handle_call(index_tables,_From,State=#state{file=File}) -> handle_call(schedulers,_From,State=#state{file=File}) -> Schedulers=schedulers(File), TW = truncated_warning([?scheduler]), - {reply,{ok,Schedulers,TW},State}. - + {reply,{ok,Schedulers,TW},State}; +handle_call(get_dump_versions,_From,State=#state{dump_vsn=DumpVsn}) -> + {reply,{ok,{?max_dump_version,DumpVsn}},State}. %%-------------------------------------------------------------------- @@ -780,11 +806,12 @@ parse_vsn_str(Str,WS) -> %%%----------------------------------------------------------------- -%%% Traverse crash dump and insert index in table for each heading -%%% -%%% Progress is reported during the time and MUST be checked with -%%% crashdump_viewer:get_progress/0 until it returns {ok,done}. +%%% Traverse crash dump and insert index in table for each heading. +%%% Progress is reported during the time. do_read_file(File) -> + erase(?literals), %Clear literal cache. + put(truncated,false), %Not truncated (yet). + erase(truncated_reason), %Not truncated (yet). case file:read_file_info(File) of {ok,#file_info{type=regular, access=FileA, @@ -796,17 +823,21 @@ do_read_file(File) -> {Tag,Id,Rest,N1} = tag(Fd,TagAndRest,1), case Tag of ?erl_crash_dump -> - reset_tables(), - insert_index(Tag,Id,N1+1), - put_last_tag(Tag,""), - DumpVsn = [list_to_integer(L) || - L<-string:tokens(Id,".")], - AddrAdj = get_bin_addr_adj(DumpVsn), - indexify(Fd,AddrAdj,Rest,N1), - end_progress(), - check_if_truncated(), - close(Fd), - {ok,DumpVsn}; + case check_dump_version(Id) of + {ok,DumpVsn} -> + reset_tables(), + insert_index(Tag,Id,N1+1), + put_last_tag(Tag,""), + AddrAdj = get_bin_addr_adj(DumpVsn), + indexify(Fd,AddrAdj,Rest,N1), + end_progress(), + check_if_truncated(), + close(Fd), + {ok,DumpVsn}; + Error -> + close(Fd), + Error + end; _Other -> R = io_lib:format( "~ts is not an Erlang crash dump~n", @@ -834,6 +865,18 @@ do_read_file(File) -> {error,R} end. +check_dump_version(Vsn) -> + DumpVsn = [list_to_integer(L) || L<-string:tokens(Vsn,".")], + if DumpVsn > ?max_dump_version -> + Info = + "This Crashdump Viewer is too old for the given " + "Erlang crash dump. Please use a newer version of " + "Crashdump Viewer.", + {error,Info}; + true -> + {ok,DumpVsn} + end. + indexify(Fd,AddrAdj,Bin,N) -> case binary:match(Bin,<<"\n=">>) of {Start,Len} -> @@ -856,6 +899,19 @@ indexify(Fd,AddrAdj,Bin,N) -> {?proc_heap,LastId} -> [{_,LastPos}] = lookup_index(?proc_heap,LastId), ets:insert(cdv_heap_file_chars,{LastId,N+Start+1-LastPos}); + {?literals,[]} -> + case get(truncated_reason) of + undefined -> + [{_,LastPos}] = lookup_index(?literals,[]), + ets:insert(cdv_heap_file_chars, + {literals,N+Start+1-LastPos}); + _ -> + %% Literals are truncated. Make sure we never + %% attempt to read in the literals. (Heaps that + %% references literals will show markers for + %% incomplete heaps, but will otherwise work.) + delete_index(?literals, []) + end; _ -> ok end, indexify(Fd,AddrAdj,Rest,N1); @@ -908,6 +964,7 @@ check_if_truncated() -> find_truncated_proc({Tag,_Id}) when Tag==?atoms; Tag==?binary; Tag==?instr_data; + Tag==?literals; Tag==?memory_status; Tag==?memory_map -> put(truncated_proc,false); @@ -1065,7 +1122,7 @@ get_proc_details(File,Pid,WS,DumpVsn) -> {{Stack,MsgQ,Dict},TW} = case truncated_warning([{?proc,Pid}]) of [] -> - {expand_memory(Fd,Pid,DumpVsn),[]}; + expand_memory(Fd,Pid,DumpVsn); TW0 -> {{[],[],[]},TW0} end, @@ -1386,12 +1443,40 @@ maybe_other_node2(Channel) -> expand_memory(Fd,Pid,DumpVsn) -> BinAddrAdj = get_bin_addr_adj(DumpVsn), put(fd,Fd), - Dict = read_heap(Fd,Pid,BinAddrAdj,gb_trees:empty()), + Dict0 = case get(?literals) of + undefined -> + Literals = read_literals(Fd), + put(?literals,Literals), + put(fd,Fd), + Literals; + Literals -> + Literals + end, + Dict = read_heap(Fd,Pid,BinAddrAdj,Dict0), Expanded = {read_stack_dump(Fd,Pid,BinAddrAdj,Dict), read_messages(Fd,Pid,BinAddrAdj,Dict), read_dictionary(Fd,Pid,BinAddrAdj,Dict)}, erase(fd), - Expanded. + IncompleteWarning = + case erase(incomplete_heap) of + undefined -> + []; + true -> + ["WARNING: This process has an incomplete heap. " + "Some information might be missing."] + end, + {Expanded,IncompleteWarning}. + +read_literals(Fd) -> + case lookup_index(?literals,[]) of + [{_,Start}] -> + [{_,Chars}] = ets:lookup(cdv_heap_file_chars,literals), + init_progress("Reading literals",Chars), + pos_bof(Fd,Start), + read_heap(0,gb_trees:empty()); + [] -> + gb_trees:empty() + end. %%%----------------------------------------------------------------- %%% This is a workaround for a bug in dump versions prior to 0.3: @@ -2589,8 +2674,26 @@ parse_heap_term("Ys"++Line0, Addr, BinAddrAdj, D0) -> %Sub binary. end end, D = gb_trees:insert(Addr, Term, D0), - {Term,Line,D}. - + {Term,Line,D}; +parse_heap_term("Mf"++Line0, Addr, BinAddrAdj, D0) -> %Flatmap. + {Size,":"++Line1} = get_hex(Line0), + {Keys,":"++Line2,D1} = parse_term(Line1, BinAddrAdj, D0), + {Values,Line,D2} = parse_tuple(Size, Line2, Addr,BinAddrAdj, D1, []), + Pairs = zip_tuples(tuple_size(Keys), Keys, Values, []), + Map = maps:from_list(Pairs), + D = gb_trees:update(Addr, Map, D2), + {Map,Line,D}; +parse_heap_term("Mh"++Line0, Addr, BinAddrAdj, D0) -> %Head node in a hashmap. + {MapSize,":"++Line1} = get_hex(Line0), + {N,":"++Line2} = get_hex(Line1), + {Nodes,Line,D1} = parse_tuple(N, Line2, Addr, BinAddrAdj, D0, []), + Map = maps:from_list(flatten_hashmap_nodes(Nodes)), + MapSize = maps:size(Map), %Assertion. + D = gb_trees:update(Addr, Map, D1), + {Map,Line,D}; +parse_heap_term("Mn"++Line0, Addr, BinAddrAdj, D) -> %Interior node in a hashmap. + {N,":"++Line} = get_hex(Line0), + parse_tuple(N, Line, Addr, BinAddrAdj, D, []). parse_tuple(0, Line, Addr, _, D0, Acc) -> Tuple = list_to_tuple(lists:reverse(Acc)), @@ -2604,6 +2707,25 @@ parse_tuple(N, Line0, Addr, BinAddrAdj, D0, Acc) -> parse_tuple(N-1, Line, Addr, BinAddrAdj, D, [Term|Acc]) end. +zip_tuples(0, _T1, _T2, Acc) -> + Acc; +zip_tuples(N, T1, T2, Acc) when N =< tuple_size(T1) -> + zip_tuples(N-1, T1, T2, [{element(N, T1),element(N, T2)}|Acc]). + +flatten_hashmap_nodes(Tuple) -> + flatten_hashmap_nodes_1(tuple_size(Tuple), Tuple, []). + +flatten_hashmap_nodes_1(0, _Tuple, Acc) -> + Acc; +flatten_hashmap_nodes_1(N, Tuple0, Acc0) -> + case element(N, Tuple0) of + [K|V] -> + flatten_hashmap_nodes_1(N-1, Tuple0, [{K,V}|Acc0]); + Tuple when is_tuple(Tuple) -> + Acc = flatten_hashmap_nodes_1(N-1, Tuple0, Acc0), + flatten_hashmap_nodes_1(tuple_size(Tuple), Tuple, Acc) + end. + parse_term([$H|Line0], BinAddrAdj, D) -> %Pointer to heap term. {Ptr,Line} = get_hex(Line0), deref_ptr(Ptr, Line, BinAddrAdj, D); @@ -2670,6 +2792,7 @@ deref_ptr(Ptr, Line, BinAddrAdj, D0) -> none -> case get(fd) of end_of_heap -> + put(incomplete_heap,true), {['#CDVIncompleteHeap'],Line,D0}; Fd -> case bytes(Fd) of @@ -2792,6 +2915,10 @@ reset_tables() -> insert_index(Tag,Id,Pos) -> ets:insert(cdv_dump_index_table,{{Tag,Pos},Id}). +delete_index(Tag,Id) -> + Ms = [{{{Tag,'$1'},Id},[],[true]}], + ets:select_delete(cdv_dump_index_table, Ms). + lookup_index({Tag,Id}) -> lookup_index(Tag,Id); lookup_index(Tag) -> @@ -2808,6 +2935,7 @@ insert_binary_index(Addr,Pos) -> lookup_binary_index(Addr) -> ets:lookup(cdv_binary_index_table,Addr). + %%----------------------------------------------------------------- %% Convert tags read from crashdump to atoms used as first part of key %% in cdv_dump_index_table @@ -2825,6 +2953,7 @@ tag_to_atom("hidden_node") -> ?hidden_node; tag_to_atom("index_table") -> ?index_table; tag_to_atom("instr_data") -> ?instr_data; tag_to_atom("internal_ets") -> ?internal_ets; +tag_to_atom("literals") -> ?literals; tag_to_atom("loaded_modules") -> ?loaded_modules; tag_to_atom("memory") -> ?memory; tag_to_atom("mod") -> ?mod; @@ -2848,8 +2977,10 @@ tag_to_atom(UnknownTag) -> %%%----------------------------------------------------------------- %%% Store last tag for use when truncated, and reason if aborted put_last_tag(?abort,Reason) -> - %% Don't overwrite the real last tag - put(truncated_reason,Reason); + %% Don't overwrite the real last tag, and make sure to return + %% the previous last tag. + put(truncated_reason,Reason), + get(last_tag); put_last_tag(Tag,Id) -> put(last_tag,{Tag,Id}). |