aboutsummaryrefslogtreecommitdiffstats
path: root/lib/observer/src
diff options
context:
space:
mode:
Diffstat (limited to 'lib/observer/src')
-rw-r--r--lib/observer/src/crashdump_viewer.erl94
1 files changed, 71 insertions, 23 deletions
diff --git a/lib/observer/src/crashdump_viewer.erl b/lib/observer/src/crashdump_viewer.erl
index ddf2879a97..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
@@ -294,6 +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
%%====================================================================
@@ -455,8 +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}.
%%--------------------------------------------------------------------
@@ -781,10 +806,8 @@ 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).
@@ -800,17 +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",
@@ -838,6 +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} ->
@@ -1083,7 +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,
@@ -1418,7 +1457,15 @@ expand_memory(Fd,Pid,DumpVsn) ->
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
@@ -2745,6 +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