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authorBjörn Gustavsson <[email protected]>2011-03-16 16:22:33 +0100
committerBjörn Gustavsson <[email protected]>2011-08-16 08:58:47 +0200
commit2cbf01d49adda893018a9fbeb76c5e12b57bc3c5 (patch)
treee6f2dacb922a61f90ee92a6df0145fec565341aa /lib/debugger/src/dbg_istk.erl
parent15fc610fe64c052faf1ba997b771123fe4c383d7 (diff)
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dbg_istk: Use a record for stack entries instead of a tuple
Diffstat (limited to 'lib/debugger/src/dbg_istk.erl')
-rw-r--r--lib/debugger/src/dbg_istk.erl51
1 files changed, 25 insertions, 26 deletions
diff --git a/lib/debugger/src/dbg_istk.erl b/lib/debugger/src/dbg_istk.erl
index c0cc6a2697..8331f46eb8 100644
--- a/lib/debugger/src/dbg_istk.erl
+++ b/lib/debugger/src/dbg_istk.erl
@@ -27,6 +27,14 @@
-define(STACK, ?MODULE).
+-record(e,
+ {level, %Level
+ mfa, %{Mod,Func,Args|Arity}|{Fun,Args}
+ cm, %Module called from
+ line, %Line called from
+ bindings
+ }).
+
init() ->
init([]).
@@ -46,14 +54,6 @@ init(Stack) ->
%% Debugged when it should raise an exception or evaluate a
%% function (since it might possible raise an exception)
%%
-%% Stack = [Entry]
-%% Entry = {Le, {MFA, Where, Bs}}
-%% Le = int() % current call level
-%% MFA = {M,F,Args} % called function (or fun)
-%% | {Fun,Args} %
-%% Where = {M,Li} % from where (module+line) function is called
-%% Bs = bindings() % current variable bindings
-%%
%% How to push depends on the "Stack Trace" option (value saved in
%% process dictionary item 'trace_stack').
%% all - everything is pushed
@@ -62,7 +62,7 @@ init(Stack) ->
%% Whenever a function returns, the corresponding call frame is popped.
push(MFA, Bs, #ieval{level=Le,module=Cm,line=Li,last_call=Lc}) ->
- Entry = {Le, {MFA, {Cm,Li}, Bs}},
+ Entry = #e{level=Le,mfa=MFA,cm=Cm,line=Li,bindings=Bs},
case get(trace_stack) of
false -> ignore;
no_tail when Lc ->
@@ -93,7 +93,7 @@ pop(Le) ->
put(?STACK, pop(Le, get(?STACK)))
end.
-pop(Level, [{Le, _}|Stack]) when Level=<Le ->
+pop(Level, [#e{level=Le}|Stack]) when Level =< Le ->
pop(Level, Stack);
pop(_Level, Stack) ->
Stack.
@@ -105,7 +105,7 @@ stack_level() ->
stack_level(get(?STACK)).
stack_level([]) -> 1;
-stack_level([{Le,_}|_]) -> Le.
+stack_level([#e{level=Le}|_]) -> Le.
%% exception_stacktrace(HowMuch, #ieval{}) -> Stacktrace
%% HowMuch = complete | no_current
@@ -135,13 +135,13 @@ sublist([], _Start, _Length) ->
sublist(L, Start, Length) ->
lists:sublist(L, Start, Length).
-fix_stacktrace2([{_,{{M,F,As1},_,_}}, {_,{{M,F,As2},_,_}}|_])
+fix_stacktrace2([#e{mfa={M,F,As1}}, #e{mfa={M,F,As2}}|_])
when length(As1) =:= length(As2) ->
[{M,F,As1}];
-fix_stacktrace2([{_,{{Fun,As1},_,_}}, {_,{{Fun,As2},_,_}}|_])
+fix_stacktrace2([#e{mfa={Fun,As1}}, #e{mfa={Fun,As2}}|_])
when length(As1) =:= length(As2) ->
[{Fun,As1}];
-fix_stacktrace2([{_,{MFA,_,_}}|Entries]) ->
+fix_stacktrace2([#e{mfa=MFA}|Entries]) ->
[MFA|fix_stacktrace2(Entries)];
fix_stacktrace2([]) ->
[].
@@ -159,7 +159,7 @@ args2arity([]) ->
bindings(SP) ->
bindings(SP, get(?STACK)).
-bindings(SP, [{SP,{_MFA,_Wh,Bs}}|_]) ->
+bindings(SP, [#e{level=SP,bindings=Bs}|_]) ->
Bs;
bindings(SP, [_Entry|Entries]) ->
bindings(SP, Entries);
@@ -180,14 +180,14 @@ stack_frame(up, SP) ->
stack_frame(down, SP) ->
stack_frame(SP, down, lists:reverse(get(?STACK))).
-stack_frame(SP, up, [{Le, {_MFA,Where,Bs}}|_]) when Le<SP ->
- {Le, Where, Bs};
-stack_frame(SP, down, [{Le, {_MFA,Where,Bs}}|_]) when Le>SP ->
- {Le, Where, Bs};
-stack_frame(SP, Dir, [{SP, _}|Stack]) ->
+stack_frame(SP, up, [#e{level=Le,cm=Cm,line=Li,bindings=Bs}|_]) when Le < SP ->
+ {Le,{Cm,Li},Bs};
+stack_frame(SP, down, [#e{level=Le,cm=Cm,line=Li,bindings=Bs}|_]) when Le > SP ->
+ {Le,{Cm,Li},Bs};
+stack_frame(SP, Dir, [#e{level=SP}|Stack]) ->
case Stack of
- [{Le, {_MFA,Where,Bs}}|_] ->
- {Le, Where, Bs};
+ [#e{level=Le,cm=Cm,line=Li,bindings=Bs}|_] ->
+ {Le,{Cm,Li},Bs};
[] when Dir =:= up ->
top;
[] when Dir =:= down ->
@@ -205,7 +205,7 @@ backtrace(HowMany) ->
all -> get(?STACK);
N -> lists:sublist(get(?STACK), N)
end,
- [{Le, MFA} || {Le,{MFA,_Wh,_Bs}} <- Stack].
+ [{Le,MFA} || #e{level=Le,mfa=MFA} <- Stack].
%%--------------------------------------------------------------------
%% in_use_p(Mod, Cm) -> boolean()
@@ -217,8 +217,7 @@ in_use_p(Mod, _Cm) ->
case get(trace_stack) of
false -> true;
_ -> % all | no_tail
- lists:any(fun({_,{M,_,_,_}}) when M =:= Mod -> true;
+ lists:any(fun(#e{mfa={M,_,_}}) when M =:= Mod -> true;
(_) -> false
- end,
- get(?STACK))
+ end, get(?STACK))
end.