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-rw-r--r--lib/observer/src/crashdump_viewer.erl175
1 files changed, 125 insertions, 50 deletions
diff --git a/lib/observer/src/crashdump_viewer.erl b/lib/observer/src/crashdump_viewer.erl
index d2a175d52d..276b209ce5 100644
--- a/lib/observer/src/crashdump_viewer.erl
+++ b/lib/observer/src/crashdump_viewer.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2003-2017. All Rights Reserved.
+%% Copyright Ericsson AB 2003-2018. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -877,7 +877,7 @@ do_read_file(File) ->
end.
check_dump_version(Vsn) ->
- DumpVsn = [list_to_integer(L) || L<-string:tokens(Vsn,".")],
+ DumpVsn = [list_to_integer(L) || L<-string:lexemes(Vsn,".")],
if DumpVsn > ?max_dump_version ->
Info =
"This Crashdump Viewer is too old for the given "
@@ -1594,31 +1594,92 @@ read_heap(Fd,Pid,DecodeOpts,Dict0) ->
Dict0
end.
-read_heap(DecodeOpts,Dict0) ->
- %% This function is never called if the dump is truncated in {?proc_heap,Pid}
- case get(fd) of
- end_of_heap ->
+read_heap(DecodeOpts, Dict0) ->
+ %% This function is never called if the dump is truncated in
+ %% {?proc_heap,Pid}.
+ %%
+ %% It is not always possible to reconstruct the heap terms
+ %% in a single pass, especially if maps are involved.
+ %% See crashdump_helper:literal_map/0 for an example.
+ %%
+ %% Therefore, we need two passes. In the first pass
+ %% we collect all lines without parsing them, and in the
+ %% second pass we parse them.
+ %%
+ %% The first pass follows.
+
+ Lines0 = read_heap_lines(),
+
+ %% Save a map of all unprocessed lines so that deref_ptr() can
+ %% access any line when there are references to terms not yet
+ %% built.
+
+ LineMap = maps:from_list(Lines0),
+ put(line_map, LineMap),
+
+ %% Refc binaries (tag "Yc") must be processed before any sub
+ %% binaries (tag "Ys") referencing them, so we make sure to
+ %% process all the refc binaries first.
+ %%
+ %% The other lines can be processed in any order, but processing
+ %% them in the reverse order compared to how they are printed in
+ %% the crash dump seems to minimize the number of references to
+ %% terms that have not yet been built. That happens to be the
+ %% order of the line list as returned by read_heap_lines/0.
+
+ RefcBins = [Refc || {_,<<"Yc",_/binary>>}=Refc <- Lines0],
+ Lines = RefcBins ++ Lines0,
+
+ %% Second pass.
+
+ init_progress("Processing terms", map_size(LineMap)),
+ Dict = parse_heap_terms(Lines, DecodeOpts, Dict0),
+ erase(line_map),
+ end_progress(),
+ Dict.
+
+read_heap_lines() ->
+ read_heap_lines_1(get(fd), []).
+
+read_heap_lines_1(Fd, Acc) ->
+ case bytes(Fd) of
+ "=" ++ _next_tag ->
end_progress(),
- Dict0;
- Fd ->
- case bytes(Fd) of
- "=" ++ _next_tag ->
- end_progress(),
- put(fd, end_of_heap),
- Dict0;
- Line ->
- update_progress(length(Line)+1),
- Dict = parse(Line,DecodeOpts,Dict0),
- read_heap(DecodeOpts,Dict)
- end
+ put(fd, end_of_heap),
+ Acc;
+ Line0 ->
+ update_progress(length(Line0)+1),
+ {Addr,":"++Line1} = get_hex(Line0),
+
+ %% Reduce the memory consumption by converting the
+ %% line to a binary. Measurements show that it may also
+ %% be benefical for performance, too, because it makes the
+ %% garbage collections cheaper.
+
+ Line = list_to_binary(Line1),
+ read_heap_lines_1(Fd, [{Addr,Line}|Acc])
end.
-parse(Line0, DecodeOpts, Dict0) ->
- {Addr,":"++Line1} = get_hex(Line0),
- {_Term,Line,Dict} = parse_heap_term(Line1, Addr, DecodeOpts, Dict0),
- [] = skip_blanks(Line),
+parse_heap_terms([{Addr,Line0}|T], DecodeOpts, Dict0) ->
+ case gb_trees:is_defined(Addr, Dict0) of
+ true ->
+ %% Already parsed (by a recursive call from do_deref_ptr()
+ %% to parse_line()). Nothing to do.
+ parse_heap_terms(T, DecodeOpts, Dict0);
+ false ->
+ %% Parse this previously unparsed term.
+ Dict = parse_line(Addr, Line0, DecodeOpts, Dict0),
+ parse_heap_terms(T, DecodeOpts, Dict)
+ end;
+parse_heap_terms([], _DecodeOpts, Dict) ->
Dict.
+parse_line(Addr, Line0, DecodeOpts, Dict0) ->
+ update_progress(1),
+ Line1 = binary_to_list(Line0),
+ {_Term,Line,Dict} = parse_heap_term(Line1, Addr, DecodeOpts, Dict0),
+ [] = skip_blanks(Line), %Assertion.
+ Dict.
%%-----------------------------------------------------------------
%% Page with one port
@@ -1643,7 +1704,7 @@ get_ports(File) ->
%% Converting port string to tuple to secure correct sorting. This is
%% converted back in cdv_port_cb:format/1.
port_to_tuple("#Port<"++Port) ->
- [I1,I2] = string:tokens(Port,".>"),
+ [I1,I2] = string:lexemes(Port,".>"),
{list_to_integer(I1),list_to_integer(I2)}.
get_portinfo(Fd,Port) ->
@@ -1670,9 +1731,9 @@ get_portinfo(Fd,Port) ->
"Registered as" ->
get_portinfo(Fd,Port#port{name=string(Fd)});
"Monitors" ->
- Monitors0 = string:tokens(bytes(Fd),"()"),
+ Monitors0 = string:lexemes(bytes(Fd),"()"),
Monitors = [begin
- [Pid,Ref] = string:tokens(Mon,","),
+ [Pid,Ref] = string:lexemes(Mon,","),
{Pid,Pid++" ("++Ref++")"}
end || Mon <- Monitors0],
get_portinfo(Fd,Port#port{monitors=Monitors});
@@ -1746,7 +1807,7 @@ get_etsinfo(Fd,EtsTable = #ets_table{details=Ds},WS) ->
"Buckets" ->
%% A bug in erl_db_hash.c prints a space after the buckets
%% - need to strip the string to make list_to_integer/1 happy.
- Buckets = list_to_integer(string:strip(bytes(Fd))),
+ Buckets = list_to_integer(string:trim(bytes(Fd),both,"\s")),
get_etsinfo(Fd,EtsTable#ets_table{buckets=Buckets},WS);
"Objects" ->
get_etsinfo(Fd,EtsTable#ets_table{size=list_to_integer(bytes(Fd))},WS);
@@ -1764,7 +1825,9 @@ get_etsinfo(Fd,EtsTable = #ets_table{details=Ds},WS) ->
Val = bytes(Fd),
get_etsinfo(Fd,EtsTable#ets_table{details=Ds#{chain_min=>Val}},WS);
"Chain Length Avg" ->
- Val = try list_to_float(string:strip(bytes(Fd))) catch _:_ -> "-" end,
+ Val = try list_to_float(string:trim(bytes(Fd),both,"\s"))
+ catch _:_ -> "-"
+ end,
get_etsinfo(Fd,EtsTable#ets_table{details=Ds#{chain_avg=>Val}},WS);
"Chain Length Max" ->
Val = bytes(Fd),
@@ -1921,7 +1984,7 @@ get_nodeinfo(Fd,Nod) ->
Creations = lists:flatmap(fun(C) -> try [list_to_integer(C)]
catch error:badarg -> []
end
- end, string:tokens(bytes(Fd)," ")),
+ end, string:lexemes(bytes(Fd)," ")),
get_nodeinfo(Fd,Nod#nod{creation={creations,Creations}});
"Remote link" ->
Procs = bytes(Fd), % e.g. "<0.31.0> <4322.54.0>"
@@ -2359,7 +2422,7 @@ get_size_value(Key,Data) ->
%% and Value is the sum over all allocator instances of each type.
sort_allocator_types([{Name,Data}|Allocators],Acc,DoTotal) ->
Type =
- case string:tokens(Name,"[]") of
+ case string:lexemes(Name,"[]") of
[T,_Id] -> T;
[Name] -> Name;
Other -> Other
@@ -2869,16 +2932,18 @@ parse_atom_translation_table(N, Line0, As) ->
deref_ptr(Ptr, Line, DecodeOpts, D) ->
- Lookup = fun(D0) ->
- gb_trees:lookup(Ptr, D0)
- end,
+ Lookup0 = fun(D0) ->
+ gb_trees:lookup(Ptr, D0)
+ end,
+ Lookup = wrap_line_map(Ptr, Lookup0),
do_deref_ptr(Lookup, Line, DecodeOpts, D).
deref_bin(Binp0, Offset, Sz, Line, DecodeOpts, D) ->
Binp = Binp0 bor DecodeOpts#dec_opts.bin_addr_adj,
- Lookup = fun(D0) ->
- lookup_binary(Binp, Offset, Sz, D0)
- end,
+ Lookup0 = fun(D0) ->
+ lookup_binary(Binp, Offset, Sz, D0)
+ end,
+ Lookup = wrap_line_map(Binp, Lookup0),
do_deref_ptr(Lookup, Line, DecodeOpts, D).
lookup_binary(Binp, Offset, Sz, D) ->
@@ -2897,26 +2962,36 @@ lookup_binary(Binp, Offset, Sz, D) ->
end
end.
+wrap_line_map(Ptr, Lookup) ->
+ wrap_line_map_1(get(line_map), Ptr, Lookup).
+
+wrap_line_map_1(#{}=LineMap, Ptr, Lookup) ->
+ fun(D) ->
+ case Lookup(D) of
+ {value,_}=Res ->
+ Res;
+ none ->
+ case LineMap of
+ #{Ptr:=Line} ->
+ {line,Ptr,Line};
+ #{} ->
+ none
+ end
+ end
+ end;
+wrap_line_map_1(undefined, _Ptr, Lookup) ->
+ Lookup.
+
do_deref_ptr(Lookup, Line, DecodeOpts, D0) ->
case Lookup(D0) of
{value,Term} ->
{Term,Line,D0};
none ->
- case get(fd) of
- end_of_heap ->
- put(incomplete_heap,true),
- {['#CDVIncompleteHeap'],Line,D0};
- Fd ->
- case bytes(Fd) of
- "="++_ ->
- put(fd, end_of_heap),
- do_deref_ptr(Lookup, Line, DecodeOpts, D0);
- L ->
- update_progress(length(L)+1),
- D = parse(L, DecodeOpts, D0),
- do_deref_ptr(Lookup, Line, DecodeOpts, D)
- end
- end
+ put(incomplete_heap, true),
+ {['#CDVIncompleteHeap'],Line,D0};
+ {line,Addr,NewLine} ->
+ D = parse_line(Addr, NewLine, DecodeOpts, D0),
+ do_deref_ptr(Lookup, Line, DecodeOpts, D)
end.
get_hex(L) ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 12:20:30 +0000