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authorBjörn Gustavsson <[email protected]>2011-03-31 08:33:56 +0200
committerBjörn Gustavsson <[email protected]>2011-08-16 08:58:48 +0200
commite21b58ac5a016d62bba8117ec09105bcac8b94e8 (patch)
tree410f197a7b524d321d738aac2fd46f912fd44efc /lib
parentbbb379003d071f19595bb36d3ead79ba0c8474d3 (diff)
downloadotp-e21b58ac5a016d62bba8117ec09105bcac8b94e8.tar.gz
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Fix the no_tail option
The 'no_tail' option was broken and would work almost as the 'all' option, because it would use #ieval.top (formerly known as #ieval.last_call) as the basis for its decision to push or not. Fix it by including a boolean in each call/apply instruction indicating whether the call is tail-recursive and pass that boolean to the dbg_istk:push() function.
Diffstat (limited to 'lib')
-rw-r--r--lib/debugger/src/dbg_ieval.erl30
-rw-r--r--lib/debugger/src/dbg_iload.erl208
-rw-r--r--lib/debugger/src/dbg_istk.erl6
3 files changed, 123 insertions, 121 deletions
diff --git a/lib/debugger/src/dbg_ieval.erl b/lib/debugger/src/dbg_ieval.erl
index d4009cea4d..251c11fdb9 100644
--- a/lib/debugger/src/dbg_ieval.erl
+++ b/lib/debugger/src/dbg_ieval.erl
@@ -413,8 +413,8 @@ eval_mfa(Debugged, M, F, As, #ieval{level=Le}=Ieval0) ->
{exception, {Class, Reason, get_stacktrace()}}
end.
-eval_function(Mod, Name, As, Bs, Called, Ieval0) ->
- Ieval = dbg_istk:push(Bs, Ieval0),
+eval_function(Mod, Name, As, Bs, Called, Ieval0, Lc) ->
+ Ieval = dbg_istk:push(Bs, Ieval0, Lc),
Res = do_eval_function(Mod, Name, As, Bs, Called, Ieval),
dbg_istk:pop(),
Res.
@@ -773,21 +773,21 @@ expr({make_fun,Line,Name,Cs}, Bs, #ieval{module=Module}=Ieval) ->
{value,Fun,Bs};
%% Common test adaptation
-expr({call_remote,0,ct_line,line,As0}, Bs0, Ieval0) ->
+expr({call_remote,0,ct_line,line,As0,Lc}, Bs0, Ieval0) ->
{As,_Bs} = eval_list(As0, Bs0, Ieval0),
- eval_function(ct_line, line, As, Bs0, extern, Ieval0);
+ eval_function(ct_line, line, As, Bs0, extern, Ieval0, Lc);
%% Local function call
-expr({local_call,Line,F,As0}, Bs0, #ieval{module=M} = Ieval0) ->
+expr({local_call,Line,F,As0,Lc}, Bs0, #ieval{module=M} = Ieval0) ->
Ieval = Ieval0#ieval{line=Line},
{As,Bs} = eval_list(As0, Bs0, Ieval),
- eval_function(M, F, As, Bs, local, Ieval);
+ eval_function(M, F, As, Bs, local, Ieval, Lc);
%% Remote function call
-expr({call_remote,Line,M,F,As0}, Bs0, Ieval0) ->
+expr({call_remote,Line,M,F,As0,Lc}, Bs0, Ieval0) ->
Ieval = Ieval0#ieval{line=Line},
{As,Bs} = eval_list(As0, Bs0, Ieval),
- eval_function(M, F, As, Bs, extern, Ieval);
+ eval_function(M, F, As, Bs, extern, Ieval, Lc);
%% Emulated semantics of some BIFs
expr({dbg,Line,self,[]}, Bs, #ieval{level=Le}) ->
@@ -840,7 +840,7 @@ expr({safe_bif,Line,M,F,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
Ieval1 = Ieval0#ieval{line=Line},
{As,Bs} = eval_list(As0, Bs0, Ieval1),
trace(bif, {Le,Line,M,F,As}),
- Ieval2 = dbg_istk:push(Bs0, Ieval1),
+ Ieval2 = dbg_istk:push(Bs0, Ieval1, false),
Ieval = Ieval2#ieval{module=M,function=F,arguments=As},
{_,Value,_} = Res = safe_bif(M, F, As, Bs, Ieval),
trace(return, {Le,Value}),
@@ -852,7 +852,7 @@ expr({bif,Line,M,F,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
Ieval1 = Ieval0#ieval{line=Line},
{As,Bs} = eval_list(As0, Bs0, Ieval1),
trace(bif, {Le,Line,M,F,As}),
- Ieval2 = dbg_istk:push(Bs0, Ieval1),
+ Ieval2 = dbg_istk:push(Bs0, Ieval1, false),
Ieval = Ieval2#ieval{module=M,function=F,arguments=As},
{_,Value,_} = Res = debugged_cmd({apply,M,F,As}, Bs, Ieval),
trace(return, {Le,Value}),
@@ -872,7 +872,7 @@ expr({op,Line,Op,As0}, Bs0, Ieval0) ->
end;
%% apply/2 (fun)
-expr({apply_fun,Line,Fun0,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
+expr({apply_fun,Line,Fun0,As0,Lc}, Bs0, #ieval{level=Le}=Ieval0) ->
Ieval = Ieval0#ieval{line=Line},
FunValue = case expr(Fun0, Bs0, Ieval) of
{value,{dbg_apply,Mx,Fx,Asx},Bsx} ->
@@ -884,19 +884,19 @@ expr({apply_fun,Line,Fun0,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
case FunValue of
{value,Fun,Bs1} when is_function(Fun) ->
{As,Bs} = eval_list(As0, Bs1, Ieval),
- eval_function(undefined, Fun, As, Bs, extern, Ieval);
+ eval_function(undefined, Fun, As, Bs, extern, Ieval, Lc);
{value,{M,F},Bs1} when is_atom(M), is_atom(F) ->
{As,Bs} = eval_list(As0, Bs1, Ieval),
- eval_function(M, F, As, Bs, extern, Ieval);
+ eval_function(M, F, As, Bs, extern, Ieval, Lc);
{value,BadFun,Bs1} ->
exception(error, {badfun,BadFun}, Bs1, Ieval)
end;
%% apply/3
-expr({apply,Line,As0}, Bs0, Ieval0) ->
+expr({apply,Line,As0,Lc}, Bs0, Ieval0) ->
Ieval = Ieval0#ieval{line=Line},
{[M,F,As],Bs} = eval_list(As0, Bs0, Ieval),
- eval_function(M, F, As, Bs, extern, Ieval);
+ eval_function(M, F, As, Bs, extern, Ieval, Lc);
%% Receive statement
expr({'receive',Line,Cs}, Bs0, #ieval{level=Le}=Ieval) ->
diff --git a/lib/debugger/src/dbg_iload.erl b/lib/debugger/src/dbg_iload.erl
index fde4e05128..b407cf6c99 100644
--- a/lib/debugger/src/dbg_iload.erl
+++ b/lib/debugger/src/dbg_iload.erl
@@ -154,14 +154,14 @@ get_nl([],Pos,Head) -> {lists:reverse(Head),[],Pos}.
%%% to interpret.
clauses([C0|Cs]) ->
- C1 = clause(C0),
+ C1 = clause(C0, true),
[C1|clauses(Cs)];
clauses([]) -> [].
-clause({clause,Line,H0,G0,B0}) ->
+clause({clause,Line,H0,G0,B0}, Lc) ->
H1 = head(H0),
G1 = guard(G0),
- B1 = exprs(B0),
+ B1 = exprs(B0, Lc),
{clause,Line,H1,G1,B1}.
head(Ps) -> patterns(Ps).
@@ -209,7 +209,7 @@ pattern({bin,Line,Grp}) ->
{bin,Line,Grp1};
pattern({bin_element,Line,Expr,Size,Type}) ->
Expr1 = pattern(Expr),
- Size1 = expr(Size),
+ Size1 = expr(Size, false),
{bin_element,Line,Expr1,Size1,Type}.
%% These patterns are processed "in parallel" for purposes of variable
@@ -317,173 +317,175 @@ gexpr_list([]) -> [].
%% These expressions are processed "sequentially" for purposes of variable
%% definition etc.
-exprs([E0|Es]) ->
- E1 = expr(E0),
- [E1|exprs(Es)];
-exprs([]) -> [].
-
-expr({var,Line,V}) -> {var,Line,V};
-expr({integer,Line,I}) -> {value,Line,I};
-expr({char,Line,I}) -> {value,Line,I};
-expr({float,Line,F}) -> {value,Line,F};
-expr({atom,Line,A}) -> {value,Line,A};
-expr({string,Line,S}) -> {value,Line,S};
-expr({nil,Line}) -> {value,Line,[]};
-expr({cons,Line,H0,T0}) ->
- case {expr(H0),expr(T0)} of
+exprs([E], Lc) ->
+ [expr(E, Lc)];
+exprs([E0|Es], Lc) ->
+ E1 = expr(E0, false),
+ [E1|exprs(Es, Lc)];
+exprs([], _Lc) -> [].
+
+expr({var,Line,V}, _Lc) -> {var,Line,V};
+expr({integer,Line,I}, _Lc) -> {value,Line,I};
+expr({char,Line,I}, _Lc) -> {value,Line,I};
+expr({float,Line,F}, _Lc) -> {value,Line,F};
+expr({atom,Line,A}, _Lc) -> {value,Line,A};
+expr({string,Line,S}, _Lc) -> {value,Line,S};
+expr({nil,Line}, _Lc) -> {value,Line,[]};
+expr({cons,Line,H0,T0}, _Lc) ->
+ case {expr(H0, false),expr(T0, false)} of
{{value,Line,H1},{value,Line,T1}} -> {value,Line,[H1|T1]};
{H1,T1} -> {cons,Line,H1,T1}
end;
-expr({tuple,Line,Es0}) ->
+expr({tuple,Line,Es0}, _Lc) ->
Es1 = expr_list(Es0),
{tuple,Line,Es1};
-expr({block,Line,Es0}) ->
+expr({block,Line,Es0}, Lc) ->
%% Unfold block into a sequence.
- Es1 = exprs(Es0),
+ Es1 = exprs(Es0, Lc),
{block,Line,Es1};
-expr({'if',Line,Cs0}) ->
- Cs1 = icr_clauses(Cs0),
+expr({'if',Line,Cs0}, Lc) ->
+ Cs1 = icr_clauses(Cs0, Lc),
{'if',Line,Cs1};
-expr({'case',Line,E0,Cs0}) ->
- E1 = expr(E0),
- Cs1 = icr_clauses(Cs0),
+expr({'case',Line,E0,Cs0}, Lc) ->
+ E1 = expr(E0, false),
+ Cs1 = icr_clauses(Cs0, Lc),
{'case',Line,E1,Cs1};
-expr({'receive',Line,Cs0}) ->
- Cs1 = icr_clauses(Cs0),
+expr({'receive',Line,Cs0}, Lc) ->
+ Cs1 = icr_clauses(Cs0, Lc),
{'receive',Line,Cs1};
-expr({'receive',Line,Cs0,To0,ToEs0}) ->
- To1 = expr(To0),
- ToEs1 = exprs(ToEs0),
- Cs1 = icr_clauses(Cs0),
+expr({'receive',Line,Cs0,To0,ToEs0}, Lc) ->
+ To1 = expr(To0, false),
+ ToEs1 = exprs(ToEs0, Lc),
+ Cs1 = icr_clauses(Cs0, Lc),
{'receive',Line,Cs1,To1,ToEs1};
-expr({'fun',Line,{clauses,Cs0},{_,_,Name}}) when is_atom(Name) ->
+expr({'fun',Line,{clauses,Cs0},{_,_,Name}}, _Lc) when is_atom(Name) ->
%% New R10B-2 format (abstract_v2).
Cs = fun_clauses(Cs0),
{make_fun,Line,Name,Cs};
-expr({'fun',Line,{clauses,Cs0},{_,_,_,_,Name}}) when is_atom(Name) ->
+expr({'fun',Line,{clauses,Cs0},{_,_,_,_,Name}}, _Lc) when is_atom(Name) ->
%% New R8 format (abstract_v2).
Cs = fun_clauses(Cs0),
{make_fun,Line,Name,Cs};
-expr({'fun',Line,{function,F,A},{_Index,_OldUniq,Name}}) ->
+expr({'fun',Line,{function,F,A},{_Index,_OldUniq,Name}}, _Lc) ->
%% New R8 format (abstract_v2).
As = new_vars(A, Line),
- Cs = [{clause,Line,As,[],[{local_call,Line,F,As}]}],
+ Cs = [{clause,Line,As,[],[{local_call,Line,F,As,true}]}],
{make_fun,Line,Name,Cs};
-expr({'fun',_,{clauses,_},{_OldUniq,_Hvss,_Free}}) ->
+expr({'fun',_,{clauses,_},{_OldUniq,_Hvss,_Free}}, _Lc) ->
%% Old format (abstract_v1).
exit({?MODULE,old_funs});
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,self}},[]}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,self}},[]}, _Lc) ->
{dbg,Line,self,[]};
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,get_stacktrace}},[]}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,get_stacktrace}},[]}, _Lc) ->
{dbg,Line,get_stacktrace,[]};
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,throw}},[_]=As}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,throw}},[_]=As}, _Lc) ->
{dbg,Line,throw,expr_list(As)};
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,error}},[_]=As}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,error}},[_]=As}, _Lc) ->
{dbg,Line,error,expr_list(As)};
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,exit}},[_]=As}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,exit}},[_]=As}, _Lc) ->
{dbg,Line,exit,expr_list(As)};
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,raise}},[_,_,_]=As}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,raise}},[_,_,_]=As}, _Lc) ->
{dbg,Line,raise,expr_list(As)};
-expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,apply}},[_,_,_]=As0}) ->
+expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,apply}},[_,_,_]=As0}, Lc) ->
As = expr_list(As0),
- {apply,Line,As};
-expr({call,Line,{remote,_,{atom,_,Mod},{atom,_,Func}},As0}) ->
+ {apply,Line,As,Lc};
+expr({call,Line,{remote,_,{atom,_,Mod},{atom,_,Func}},As0}, Lc) ->
As = expr_list(As0),
case erlang:is_builtin(Mod, Func, length(As)) of
false ->
- {call_remote,Line,Mod,Func,As};
+ {call_remote,Line,Mod,Func,As,Lc};
true ->
case bif_type(Mod, Func, length(As0)) of
safe -> {safe_bif,Line,Mod,Func,As};
unsafe ->{bif,Line,Mod,Func,As}
end
end;
-expr({call,Line,{remote,_,Mod0,Func0},As0}) ->
+expr({call,Line,{remote,_,Mod0,Func0},As0}, Lc) ->
%% New R8 format (abstract_v2).
- Mod = expr(Mod0),
- Func = expr(Func0),
+ Mod = expr(Mod0, false),
+ Func = expr(Func0, false),
As = consify(expr_list(As0)),
- {apply,Line,[Mod,Func,As]};
-expr({call,Line,{atom,_,Func},As0}) ->
+ {apply,Line,[Mod,Func,As],Lc};
+expr({call,Line,{atom,_,Func},As0}, Lc) ->
As = expr_list(As0),
- {local_call,Line,Func,As};
-expr({call,Line,Fun0,As0}) ->
- Fun = expr(Fun0),
+ {local_call,Line,Func,As,Lc};
+expr({call,Line,Fun0,As0}, Lc) ->
+ Fun = expr(Fun0, false),
As = expr_list(As0),
- {apply_fun,Line,Fun,As};
-expr({'catch',Line,E0}) ->
+ {apply_fun,Line,Fun,As,Lc};
+expr({'catch',Line,E0}, _Lc) ->
%% No new variables added.
- E1 = expr(E0),
+ E1 = expr(E0, false),
{'catch',Line,E1};
-expr({'try',Line,Es0,CaseCs0,CatchCs0,As0}) ->
+expr({'try',Line,Es0,CaseCs0,CatchCs0,As0}, Lc) ->
%% No new variables added.
Es = expr_list(Es0),
- CaseCs = icr_clauses(CaseCs0),
- CatchCs = icr_clauses(CatchCs0),
+ CaseCs = icr_clauses(CaseCs0, Lc),
+ CatchCs = icr_clauses(CatchCs0, Lc),
As = expr_list(As0),
{'try',Line,Es,CaseCs,CatchCs,As};
-expr({'query', Line, E0}) ->
- E = expr(E0),
+expr({'query', Line, E0}, _Lc) ->
+ E = expr(E0, false),
{'query', Line, E};
-expr({lc,Line,E0,Gs0}) -> %R8.
+expr({lc,Line,E0,Gs0}, _Lc) -> %R8.
Gs = lists:map(fun ({generate,L,P0,Qs}) ->
- {generate,L,expr(P0),expr(Qs)};
+ {generate,L,expr(P0, false),expr(Qs, false)};
({b_generate,L,P0,Qs}) -> %R12.
- {b_generate,L,expr(P0),expr(Qs)};
+ {b_generate,L,expr(P0, false),expr(Qs, false)};
(Expr) ->
case is_guard(Expr) of
true -> {guard,guard([[Expr]])};
- false -> expr(Expr)
+ false -> expr(Expr, false)
end
end, Gs0),
- {lc,Line,expr(E0),Gs};
-expr({bc,Line,E0,Gs0}) -> %R12.
+ {lc,Line,expr(E0, false),Gs};
+expr({bc,Line,E0,Gs0}, _Lc) -> %R12.
Gs = lists:map(fun ({generate,L,P0,Qs}) ->
- {generate,L,expr(P0),expr(Qs)};
+ {generate,L,expr(P0, false),expr(Qs, false)};
({b_generate,L,P0,Qs}) -> %R12.
- {b_generate,L,expr(P0),expr(Qs)};
+ {b_generate,L,expr(P0, false),expr(Qs, false)};
(Expr) ->
case is_guard(Expr) of
true -> {guard,guard([[Expr]])};
- false -> expr(Expr)
+ false -> expr(Expr, false)
end
end, Gs0),
- {bc,Line,expr(E0),Gs};
-expr({match,Line,P0,E0}) ->
- E1 = expr(E0),
+ {bc,Line,expr(E0, false),Gs};
+expr({match,Line,P0,E0}, _Lc) ->
+ E1 = expr(E0, false),
P1 = pattern(P0),
{match,Line,P1,E1};
-expr({op,Line,Op,A0}) ->
- A1 = expr(A0),
+expr({op,Line,Op,A0}, _Lc) ->
+ A1 = expr(A0, false),
{op,Line,Op,[A1]};
-expr({op,Line,'++',L0,R0}) ->
- L1 = expr(L0),
- R1 = expr(R0), %They see the same variables
+expr({op,Line,'++',L0,R0}, _Lc) ->
+ L1 = expr(L0, false),
+ R1 = expr(R0, false), %They see the same variables
{op,Line,append,[L1,R1]};
-expr({op,Line,'--',L0,R0}) ->
- L1 = expr(L0),
- R1 = expr(R0), %They see the same variables
+expr({op,Line,'--',L0,R0}, _Lc) ->
+ L1 = expr(L0, false),
+ R1 = expr(R0, false), %They see the same variables
{op,Line,subtract,[L1,R1]};
-expr({op,Line,'!',L0,R0}) ->
- L1 = expr(L0),
- R1 = expr(R0), %They see the same variables
+expr({op,Line,'!',L0,R0}, _Lc) ->
+ L1 = expr(L0, false),
+ R1 = expr(R0, false), %They see the same variables
{send,Line,L1,R1};
-expr({op,Line,Op,L0,R0}) when Op =:= 'andalso'; Op =:= 'orelse' ->
- L1 = expr(L0),
- R1 = expr(R0), %They see the same variables
+expr({op,Line,Op,L0,R0}, _Lc) when Op =:= 'andalso'; Op =:= 'orelse' ->
+ L1 = expr(L0, false),
+ R1 = expr(R0, false), %They see the same variables
{Op,Line,L1,R1};
-expr({op,Line,Op,L0,R0}) ->
- L1 = expr(L0),
- R1 = expr(R0), %They see the same variables
+expr({op,Line,Op,L0,R0}, _Lc) ->
+ L1 = expr(L0, false),
+ R1 = expr(R0, false), %They see the same variables
{op,Line,Op,[L1,R1]};
-expr({bin,Line,Grp}) ->
+expr({bin,Line,Grp}, _Lc) ->
Grp1 = expr_list(Grp),
{bin,Line,Grp1};
-expr({bin_element,Line,Expr,Size,Type}) ->
- Expr1 = expr(Expr),
- Size1 = expr(Size),
+expr({bin_element,Line,Expr,Size,Type}, _Lc) ->
+ Expr1 = expr(Expr, false),
+ Size1 = expr(Size, false),
{bin_element,Line,Expr1,Size1,Type};
-expr(Other) ->
+expr(Other, _Lc) ->
exit({?MODULE,{unknown_expr,Other}}).
%% is_guard(Expression) -> true | false.
@@ -532,17 +534,17 @@ consify([]) -> {value,0,[]}.
%% definition etc.
expr_list([E0|Es]) ->
- E1 = expr(E0),
+ E1 = expr(E0, false),
[E1|expr_list(Es)];
expr_list([]) -> [].
-icr_clauses([C0|Cs]) ->
- C1 = clause(C0),
- [C1|icr_clauses(Cs)];
-icr_clauses([]) -> [].
+icr_clauses([C0|Cs], Lc) ->
+ C1 = clause(C0, Lc),
+ [C1|icr_clauses(Cs, Lc)];
+icr_clauses([], _) -> [].
fun_clauses([{clause,L,H,G,B}|Cs]) ->
- [{clause,L,head(H),guard(G),exprs(B)}|fun_clauses(Cs)];
+ [{clause,L,head(H),guard(G),exprs(B, true)}|fun_clauses(Cs)];
fun_clauses([]) -> [].
%% new_var_name() -> VarName.
diff --git a/lib/debugger/src/dbg_istk.erl b/lib/debugger/src/dbg_istk.erl
index a0d3069d50..21365fa4e9 100644
--- a/lib/debugger/src/dbg_istk.erl
+++ b/lib/debugger/src/dbg_istk.erl
@@ -18,7 +18,7 @@
%%
-module(dbg_istk).
-export([init/0,delayed_to_external/0,from_external/1,
- push/2,pop/0,pop/1,stack_level/0,
+ push/3,pop/0,pop/1,stack_level/0,
delayed_stacktrace/0,delayed_stacktrace/2,
bindings/1,stack_frame/2,backtrace/2,
in_use_p/2]).
@@ -61,8 +61,8 @@ init(Stack) ->
%% false - nothing is pushed
%% Whenever a function returns, the corresponding call frame is popped.
-push(Bs, #ieval{level=Le,module=Mod,function=Name,arguments=As,
- line=Li,top=Lc}=Ieval) ->
+push(Bs, #ieval{level=Le,module=Mod,function=Name,
+ arguments=As,line=Li}=Ieval, Lc) ->
Entry = #e{level=Le,mfa={Mod,Name,As},line=Li,bindings=Bs},
case get(trace_stack) of
false ->