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#!/usr/bin/env escript
%% -*- erlang -*-
%% Parse address sanitizer log files generated from test runs with
%% with environment variables ASAN_LOG_DIR and TS_RUN_EMU=asan set.
%% Repeated leak reports are ignored and additional leaks of same type
%% as seen before are identified as such.
-mode(compile).
main([]) ->
help();
main(["--help"]) ->
help();
main([OutDir]) ->
case os:getenv("ASAN_LOG_DIR") of
false ->
io:format(standard_error,
"\nMissing asan log directory argument and environment\n"
"variable ASAN_LOG_DIR is not set.\n\n",[]),
help();
InDir ->
run(OutDir, InDir)
end;
main([OutDir, InDir]) ->
run(OutDir, InDir).
help() ->
io:format("\nSyntax: asan_log_to_html OutDir [InDir]\n"
"\nParses all address-sanetizer log files in InDir\n"
"and generates a summary file OutDir/asan_summary.html.\n"
"Environment variable ASAN_LOG_DIR is used if InDir\n"
"is not specified\n\n", []).
run(OutDir, InDir) ->
{ok, InFilesUS} = file:list_dir(InDir),
InFiles = lists:sort(InFilesUS),
OutFile = filename:join(OutDir, "asan_summary.html"),
{ok, FD} = file:open(OutFile, [write]),
ok = file:write(FD, <<"<!DOCTYPE html>\n"
"<html>\n"
"<head><title>Address Sanitizer</title></head>\n"
"<body>\n"
"<h1>Address Sanitizer</h1>\n">>),
lists:foldl(fun(File, Acc) ->
io:format("analyze ~s\n", [File]),
analyze_log_file(filename:join(InDir,File),
FD, Acc)
end,
{#{}, none, none},
InFiles),
ok = io:format(FD, "<hr>\n", []),
Time = calendar:system_time_to_rfc3339(erlang:system_time(second),
[{time_designator, 32}]),
%%{_, _, ThisFile} = code:get_object_code(?MODULE),
ThisFile = escript:script_name(),
User = string:trim(os:cmd("whoami")),
{ok, Host} = inet:gethostname(),
ok = io:format(FD, "<p><small>This page was generated ~s\n"
" by <tt>~s</tt>\n"
" run by ~s@~s.</small></p>\n",
[Time, ThisFile, User, Host]),
ok = file:write(FD, <<"</body>\n</html>\n">>),
ok = file:close(FD),
io:format("Generated file ~s\n", [OutFile]),
ok.
analyze_log_file(SrcFile, OutFD, {LeakMap0, PrevApp, RegEx0}) ->
[_Exe, App | _] = string:lexemes(filename:basename(SrcFile), "-"),
case App of
PrevApp -> ignore;
_ ->
Line = case PrevApp of
none -> "";
_ -> "<hr>"
end,
ok = io:format(OutFD, "~s<h2>~s</h2>\n", [Line, App])
end,
{ok, Bin} = file:read_file(SrcFile),
{Leaks, RegEx1} =
run_regex(Bin, RegEx0,
%% LeakReport
"(?:(Direct|Indirect) leak of ([0-9]+) byte\\(s\\) "
"in ([0-9]+) object\\(s\\) allocated from:\n"
"((?:[ \t]*#[0-9]+.+\n)+))" % Call stack
"|"
%% ErrorReport
"(?:(==ERROR: AddressSanitizer:.*\n"
"(?:.*\n)+?)" % any lines (non-greedy)
"^(?:==|--))" % stop at line begining with == or --
"|"
%% Skipped
"(?:^[=-]+$)", % skip lines consisting only of = or -
[multiline],
[global, {capture, all, binary}]),
%% We indentify a leak by its type (direct or indirect)
%% and its full call stack.
LeakChecker =
fun([ErrorReport, <<>>, <<>>, <<>>, <<>>, Captured],
{Out, MatchCnt, LM0}) ->
FD = fd(Out),
ok = io:format(FD, "<p><pre~s>\n", [style(error)]),
ok = file:write(FD, Captured),
ok = io:format(FD, "</pre></p>\n", []),
{FD, MatchCnt + byte_size(ErrorReport), LM0};
([LeakReport, Type, BytesBin, BlocksBin, Stack | _],
{Out, MatchCnt0, LM0}) ->
Bytes = binary_to_integer(BytesBin),
Blocks = binary_to_integer(BlocksBin),
MatchCnt1 = MatchCnt0 + byte_size(LeakReport),
Key = {Type, Stack},
case lookup_leak(LM0, Key) of
undefined ->
%% A new leak
LM1 = insert_leak(LM0, Key, Bytes, Blocks),
FD = fd(Out),
ok = io:format(FD, "<p><pre~s>\n", [style(new, Type)]),
ok = file:write(FD, LeakReport),
ok = io:format(FD, "</pre></p>\n", []),
{FD, MatchCnt1, LM1};
{Bytes, Blocks} ->
%% Exact same leak(s) repeated, ignore
{Out, MatchCnt1, LM0};
{OldBytes, OldBlocks} ->
%% More leaked bytes/blocks of same type&stack as before
LM1 = insert_leak(LM0, Key, Bytes, Blocks),
FD = fd(Out),
ok = io:format(FD, "<p><pre~s>\n", [style(more, Type)]),
ok = io:format(FD, "More ~s leak of ~w(~w) byte(s) "
"in ~w(~w) object(s) allocated from:\n",
[Type, Bytes - OldBytes, Bytes,
Blocks - OldBlocks, Blocks]),
ok = file:write(FD, Stack),
ok = io:format(FD, "</pre></p>\n", []),
{FD, MatchCnt1, LM1}
end;
([SkipLine], {Out, MatchCnt0, LM0}) ->
nomatch = binary:match(SkipLine, <<"\n">>), % Assert single line
{Out, MatchCnt0 + byte_size(SkipLine), LM0}
end,
Out0 = {OutFD, SrcFile},
{Out1, MatchedBytes, LeakMap1} = lists:foldl(LeakChecker,
{Out0, 0, LeakMap0},
Leaks),
case MatchedBytes < byte_size(Bin)-500 of
true ->
FD = fd(Out1),
ok = io:format(FD, "<h2>WARNING!!! May be unmatched error reports"
" in file ~s:</h2>\n", [SrcFile]),
FD;
false ->
Out1
end,
{LeakMap1, App, RegEx1}.
lookup_leak(LeakMap, Key) ->
maps:get(Key, LeakMap, undefined).
insert_leak(LeakMap, Key, Bytes, Blocks) ->
LeakMap#{Key => {Bytes, Blocks}}.
fd({FD, SrcFile}) ->
TcFile = filename:basename(SrcFile),
case string:lexemes(TcFile, "-") of
[_Exe, App, _Rest] ->
ok = io:format(FD, "<h3>Before first test case of ~s</h3>\n",
[App]);
[_Exe, _App, "tc", Num, Mod, Rest] ->
[Func | _] = string:lexemes(Rest, "."),
ok = io:format(FD, "<h3>Test case #~s ~s:~s</h3>\n", [Num, Mod, Func]);
_ ->
ok = io:format(FD, "<h3>Strange log file name '~s'</h3>\n",
[SrcFile])
end,
FD;
fd(FD) ->
FD.
style(error) ->
" style=\"background-color:Tomato;\"".
style(new, <<"Direct">>) ->
" style=\"background-color:orange;\"";
style(new, <<"Indirect">>) ->
"";
style(more, _) ->
" style=\"background-color:yellow;\"".
run_regex(Bin, none, RegExString, CompileOpts, RunOpts) ->
{ok, RegEx} = re:compile(RegExString, CompileOpts),
run_regex(Bin, RegEx, none, none, RunOpts);
run_regex(Bin, RegEx, _, _, RunOpts) ->
case re:run(Bin, RegEx, RunOpts) of
nomatch ->
{[], RegEx};
{match, List} ->
{List, RegEx}
end.
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