diff options
Diffstat (limited to 'lib/compiler/src')
27 files changed, 256 insertions, 121 deletions
diff --git a/lib/compiler/src/beam_a.erl b/lib/compiler/src/beam_a.erl index cdb32d5d55..6f09dc4be4 100644 --- a/lib/compiler/src/beam_a.erl +++ b/lib/compiler/src/beam_a.erl @@ -42,8 +42,7 @@ function({function,Name,Arity,CLabel,Is0}) -> Is = beam_jump:remove_unused_labels(Is1), {function,Name,Arity,CLabel,Is} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. diff --git a/lib/compiler/src/beam_block.erl b/lib/compiler/src/beam_block.erl index c640af224d..79c4b651db 100644 --- a/lib/compiler/src/beam_block.erl +++ b/lib/compiler/src/beam_block.erl @@ -45,8 +45,7 @@ function({function,Name,Arity,CLabel,Is0}) -> %% Done. {function,Name,Arity,CLabel,Is6} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. diff --git a/lib/compiler/src/beam_bs.erl b/lib/compiler/src/beam_bs.erl index beb055b23d..14cedbb582 100644 --- a/lib/compiler/src/beam_bs.erl +++ b/lib/compiler/src/beam_bs.erl @@ -38,8 +38,7 @@ function({function,Name,Arity,CLabel,Is0}, Lc0) -> {Is,Lc} = bsm_opt(Is1, Lc0), {{function,Name,Arity,CLabel,Is},Lc} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. diff --git a/lib/compiler/src/beam_bsm.erl b/lib/compiler/src/beam_bsm.erl index 9a4e7fb133..9ea5a3eb92 100644 --- a/lib/compiler/src/beam_bsm.erl +++ b/lib/compiler/src/beam_bsm.erl @@ -105,8 +105,7 @@ function({function,Name,Arity,Entry,Is}, FIndex) -> D = #btb{f=FIndex,index=Index}, {function,Name,Arity,Entry,btb_opt_1(Is, D, [])} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. diff --git a/lib/compiler/src/beam_dead.erl b/lib/compiler/src/beam_dead.erl index d379fdc4eb..da944f3ce6 100644 --- a/lib/compiler/src/beam_dead.erl +++ b/lib/compiler/src/beam_dead.erl @@ -56,8 +56,7 @@ function({function,Name,Arity,CLabel,Is0}, Lc0) -> Is = move_move_into_block(Is3, []), {{function,Name,Arity,CLabel,Is},Lc} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. @@ -272,7 +271,8 @@ backward([{jump,{f,To0}},{move,Src,Reg}=Move|Is], D, Acc) -> end; backward([{jump,{f,To}}=J|[{bif,Op,{f,BifFail},Ops,Reg}|Is]=Is0], D, Acc) -> try replace_comp_op(To, Reg, Op, Ops, D) of - I -> backward(Is, D, I++Acc) + {Test,Jump} -> + backward([Jump,Test|Is], D, Acc) catch throw:not_possible -> case To =:= BifFail of @@ -446,7 +446,7 @@ prune_redundant([], _) -> []. replace_comp_op(To, Reg, Op, Ops, D) -> False = comp_op_find_shortcut(To, Reg, {atom,false}, D), True = comp_op_find_shortcut(To, Reg, {atom,true}, D), - [bif_to_test(Op, Ops, False),{jump,{f,True}}]. + {bif_to_test(Op, Ops, False),{jump,{f,True}}}. comp_op_find_shortcut(To0, Reg, Val, D) -> case shortcut_select_label(To0, Reg, Val, D) of @@ -483,15 +483,22 @@ not_possible() -> throw(not_possible). %% F1: is_eq_exact F2 Reg Lit2 F1: is_eq_exact F2 Reg Lit2 %% L2: .... L2: %% -combine_eqs(To, [Reg,{Type,_}=Lit1]=Ops, D, [{label,L1}|_]) - when Type =:= atom; Type =:= integer -> +combine_eqs(To, [Reg,{Type,_}=Lit1]=Ops, D, Acc) + when Type =:= atom; Type =:= integer -> + Next = case Acc of + [{label,Lbl}|_] -> Lbl; + [{jump,{f,Lbl}}|_] -> Lbl + end, case beam_utils:code_at(To, D) of [{test,is_eq_exact,{f,F2},[Reg,{Type,_}=Lit2]}, {label,L2}|_] when Lit1 =/= Lit2 -> - {select,select_val,Reg,{f,F2},[Lit1,{f,L1},Lit2,{f,L2}]}; + {select,select_val,Reg,{f,F2},[Lit1,{f,Next},Lit2,{f,L2}]}; + [{test,is_eq_exact,{f,F2},[Reg,{Type,_}=Lit2]}, + {jump,{f,L2}}|_] when Lit1 =/= Lit2 -> + {select,select_val,Reg,{f,F2},[Lit1,{f,Next},Lit2,{f,L2}]}; [{select,select_val,Reg,{f,F2},[{Type,_}|_]=List0}|_] -> List = remove_from_list(Lit1, List0), - {select,select_val,Reg,{f,F2},[Lit1,{f,L1}|List]}; + {select,select_val,Reg,{f,F2},[Lit1,{f,Next}|List]}; _Is -> {test,is_eq_exact,{f,To},Ops} end; diff --git a/lib/compiler/src/beam_disasm.erl b/lib/compiler/src/beam_disasm.erl index 8fd0b36d05..dc4865487f 100644 --- a/lib/compiler/src/beam_disasm.erl +++ b/lib/compiler/src/beam_disasm.erl @@ -163,8 +163,8 @@ pp_instr(I) -> file(File) -> try process_chunks(File) - catch error:Reason -> - {error,?MODULE,{internal,{Reason,erlang:get_stacktrace()}}} + catch error:Reason:Stack -> + {error,?MODULE,{internal,{Reason,Stack}}} end. %%----------------------------------------------------------------------- @@ -1165,6 +1165,13 @@ resolve_inst({get_map_elements,Args0},_,_,_) -> {get_map_elements,FLbl,Src,{list,List}}; %% +%% OTP 21. +%% + +resolve_inst({build_stacktrace,[]},_,_,_) -> + build_stacktrace; + +%% %% Catches instructions that are not yet handled. %% resolve_inst(X,_,_,_) -> ?exit({resolve_inst,X}). diff --git a/lib/compiler/src/beam_disasm.hrl b/lib/compiler/src/beam_disasm.hrl index d968cd9587..8cc0bcf99b 100644 --- a/lib/compiler/src/beam_disasm.hrl +++ b/lib/compiler/src/beam_disasm.hrl @@ -26,7 +26,8 @@ %% IT SHOULD BE MOVED TO A FILE THAT DEFINES (AND EXPORTS) %% PROPER TYPES FOR THE SET OF BEAM INSTRUCTIONS. %% --type beam_instr() :: 'bs_init_writable' | 'fclearerror' | 'if_end' +-type beam_instr() :: 'bs_init_writable' | 'build_stacktrace' + | 'fclearerror' | 'if_end' | 'remove_message' | 'return' | 'send' | 'timeout' | tuple(). %% XXX: Very underspecified - FIX THIS diff --git a/lib/compiler/src/beam_except.erl b/lib/compiler/src/beam_except.erl index 9801c68ee2..abd39c661d 100644 --- a/lib/compiler/src/beam_except.erl +++ b/lib/compiler/src/beam_except.erl @@ -45,8 +45,7 @@ function({function,Name,Arity,CLabel,Is0}) -> Is = function_1(Is0), {function,Name,Arity,CLabel,Is} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. diff --git a/lib/compiler/src/beam_peep.erl b/lib/compiler/src/beam_peep.erl index 9436c20b36..eb3192fe8f 100644 --- a/lib/compiler/src/beam_peep.erl +++ b/lib/compiler/src/beam_peep.erl @@ -41,8 +41,7 @@ function({function,Name,Arity,CLabel,Is0}) -> Is = beam_jump:remove_unused_labels(Is1), {function,Name,Arity,CLabel,Is} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. diff --git a/lib/compiler/src/beam_receive.erl b/lib/compiler/src/beam_receive.erl index 468460eedf..3c8efa577c 100644 --- a/lib/compiler/src/beam_receive.erl +++ b/lib/compiler/src/beam_receive.erl @@ -82,8 +82,7 @@ function({function,Name,Arity,Entry,Is}) -> D = beam_utils:index_labels(Is), {function,Name,Arity,Entry,opt(Is, D, [])} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. diff --git a/lib/compiler/src/beam_record.erl b/lib/compiler/src/beam_record.erl index 419089b1bc..e4775ca6a4 100644 --- a/lib/compiler/src/beam_record.erl +++ b/lib/compiler/src/beam_record.erl @@ -56,8 +56,7 @@ function({function,Name,Arity,CLabel,Is}) -> Idx = beam_utils:index_labels(Is), {function,Name,Arity,CLabel,rewrite(Is,Idx)} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. diff --git a/lib/compiler/src/beam_reorder.erl b/lib/compiler/src/beam_reorder.erl index 910b7f6b0a..63bb57a1ac 100644 --- a/lib/compiler/src/beam_reorder.erl +++ b/lib/compiler/src/beam_reorder.erl @@ -35,8 +35,7 @@ function({function,Name,Arity,CLabel,Is0}) -> Is = reorder(Is0), {function,Name,Arity,CLabel,Is} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. diff --git a/lib/compiler/src/beam_type.erl b/lib/compiler/src/beam_type.erl index 3d842a6fd3..16d5a36447 100644 --- a/lib/compiler/src/beam_type.erl +++ b/lib/compiler/src/beam_type.erl @@ -43,8 +43,7 @@ function({function,Name,Arity,CLabel,Asm0}) -> Asm = beam_utils:delete_live_annos(Asm3), {function,Name,Arity,CLabel,Asm} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. diff --git a/lib/compiler/src/beam_utils.erl b/lib/compiler/src/beam_utils.erl index dd7ec4da96..1b2a2827cb 100644 --- a/lib/compiler/src/beam_utils.erl +++ b/lib/compiler/src/beam_utils.erl @@ -781,6 +781,8 @@ live_opt([{block,Bl0}|Is], Regs0, D, Acc) -> {Bl,Regs} = live_opt_block(reverse(Bl0), Regs0, D, [Live0]), Live = {'%live',live_regs(Regs),Regs}, live_opt(Is, Regs, D, [{block,[Live|Bl]}|Acc]); +live_opt([build_stacktrace=I|Is], _, D, Acc) -> + live_opt(Is, live_call(1), D, [I|Acc]); live_opt([{label,L}=I|Is], Regs, D0, Acc) -> D = gb_trees:insert(L, Regs, D0), live_opt(Is, Regs, D, [I|Acc]); diff --git a/lib/compiler/src/beam_validator.erl b/lib/compiler/src/beam_validator.erl index be8908dd6b..2ad9747940 100644 --- a/lib/compiler/src/beam_validator.erl +++ b/lib/compiler/src/beam_validator.erl @@ -130,9 +130,8 @@ validate_0(Module, [{function,Name,Ar,Entry,Code}|Fs], Ft) -> throw:Error -> %% Controlled error. [Error|validate_0(Module, Fs, Ft)]; - Class:Error -> + Class:Error:Stack -> %% Crash. - Stack = erlang:get_stacktrace(), io:fwrite("Function: ~w/~w\n", [Name,Ar]), erlang:raise(Class, Error, Stack) end. @@ -294,6 +293,8 @@ valfun_1({bs_context_to_binary,Ctx}, #vst{current=#st{x=Xs}}=Vst) -> end; valfun_1(bs_init_writable=I, Vst) -> call(I, 1, Vst); +valfun_1(build_stacktrace=I, Vst) -> + call(I, 1, Vst); valfun_1({move,{y,_}=Src,{y,_}=Dst}, Vst) -> %% The stack trimming optimization may generate a move from an initialized %% but unassigned Y register to another Y register. diff --git a/lib/compiler/src/beam_z.erl b/lib/compiler/src/beam_z.erl index 787e33c142..1c56b95a9e 100644 --- a/lib/compiler/src/beam_z.erl +++ b/lib/compiler/src/beam_z.erl @@ -38,8 +38,7 @@ function({function,Name,Arity,CLabel,Is0}) -> Is = undo_renames(Is0), {function,Name,Arity,CLabel,Is} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. diff --git a/lib/compiler/src/compile.erl b/lib/compiler/src/compile.erl index ad57eae855..770aa2c6c1 100644 --- a/lib/compiler/src/compile.erl +++ b/lib/compiler/src/compile.erl @@ -1546,15 +1546,14 @@ native_compile_1(Code, St) -> {error,St#compile{errors=St#compile.errors ++ Es}} end catch - Class:R -> - Stk = erlang:get_stacktrace(), + Class:R:Stack -> case IgnoreErrors of true -> Ws = [{St#compile.ifile, - [{none,?MODULE,{native_crash,R,Stk}}]}], + [{none,?MODULE,{native_crash,R,Stack}}]}], {ok,St#compile{warnings=St#compile.warnings ++ Ws}}; false -> - erlang:raise(Class, R, Stk) + erlang:raise(Class, R, Stack) end end. diff --git a/lib/compiler/src/core_lint.erl b/lib/compiler/src/core_lint.erl index 7d3513c0ba..6e2114be56 100644 --- a/lib/compiler/src/core_lint.erl +++ b/lib/compiler/src/core_lint.erl @@ -353,12 +353,6 @@ expr(#c_case{arg=Arg,clauses=Cs}, Def, Rt, St0) -> Pc = case_patcount(Cs), St1 = body(Arg, Def, Pc, St0), clauses(Cs, Def, Pc, Rt, St1); -expr(#c_receive{clauses=Cs,timeout=#c_literal{val=infinity}, - action=#c_literal{}}, - Def, Rt, St) -> - %% If the timeout is 'infinity', the after code can never - %% be reached. We don't care if the return count is wrong. - clauses(Cs, Def, 1, Rt, St); expr(#c_receive{clauses=Cs,timeout=T,action=A}, Def, Rt, St0) -> St1 = expr(T, Def, 1, St0), St2 = body(A, Def, Rt, St1), diff --git a/lib/compiler/src/genop.tab b/lib/compiler/src/genop.tab index b5688de339..397e478e1e 100755 --- a/lib/compiler/src/genop.tab +++ b/lib/compiler/src/genop.tab @@ -545,3 +545,12 @@ BEAM_FORMAT_NUMBER=0 ## Test the arity of Reg and jumps to Lbl if it is not N. ## Test the first element of the tuple and jumps to Lbl if it is not Atom. 159: is_tagged_tuple/4 + +# OTP 21 + +## @spec build_stacktrace +## @doc Given the raw stacktrace in x(0), build a cooked stacktrace suitable +## for human consumption. Store it in x(0). Destroys all other registers. +## Do a garbage collection if necessary to allocate space on the heap +## for the result. +160: build_stacktrace/0 diff --git a/lib/compiler/src/sys_core_alias.erl b/lib/compiler/src/sys_core_alias.erl index 63e2f7488e..1bce1577d1 100644 --- a/lib/compiler/src/sys_core_alias.erl +++ b/lib/compiler/src/sys_core_alias.erl @@ -64,8 +64,7 @@ def({#c_var{name={F,Arity}}=Name,B0}) -> erase(new_var_num), {Name,B1} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [F,Arity]), erlang:raise(Class, Error, Stack) end. diff --git a/lib/compiler/src/sys_core_bsm.erl b/lib/compiler/src/sys_core_bsm.erl index 3e04cc33df..37e071fafa 100644 --- a/lib/compiler/src/sys_core_bsm.erl +++ b/lib/compiler/src/sys_core_bsm.erl @@ -44,8 +44,7 @@ function([{#c_var{name={F,Arity}}=Name,B0}|Fs], FsAcc, Ws0) -> {B,Ws} -> function(Fs, [{Name,B}|FsAcc], Ws) catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [F,Arity]), erlang:raise(Class, Error, Stack) end; diff --git a/lib/compiler/src/sys_core_dsetel.erl b/lib/compiler/src/sys_core_dsetel.erl index bd3eeae238..9e2df69b33 100644 --- a/lib/compiler/src/sys_core_dsetel.erl +++ b/lib/compiler/src/sys_core_dsetel.erl @@ -81,8 +81,7 @@ visit_module_1([{Name,F0}|Fs], Env, Acc) -> {F,_} -> visit_module_1(Fs, Env, [{Name,F}|Acc]) catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> #c_var{name={Func,Arity}} = Name, io:fwrite("Function: ~w/~w\n", [Func,Arity]), erlang:raise(Class, Error, Stack) diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index df880ff784..e28d48acf5 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -125,8 +125,7 @@ function_1({#c_var{name={F,Arity}}=Name,B0}) -> end, B0, 20), {Name,B} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [F,Arity]), erlang:raise(Class, Error, Stack) end. @@ -415,6 +414,8 @@ expr(#c_call{module=M0,name=N0}=Call0, Ctxt, Sub) -> no -> call(Call, M1, N1, Sub); {yes,Seq} -> expr(Seq, Ctxt, Sub) end; +expr(#c_primop{name=#c_literal{val=build_stacktrace}}, effect, _Sub) -> + void(); expr(#c_primop{args=As0}=Prim, _, Sub) -> As1 = expr_list(As0, value, Sub), Prim#c_primop{args=As1}; @@ -2622,9 +2623,13 @@ delay_build_expr_1(#c_receive{clauses=Cs0, timeout=Timeout, action=A0}=Rec, TypeSig) -> Cs = delay_build_cs(Cs0, TypeSig), - A = case Timeout of - #c_literal{val=infinity} -> A0; - _ -> delay_build_expr(A0, TypeSig) + A = case {Timeout,A0} of + {#c_literal{val=infinity},#c_literal{}} -> + {_Type,Arity} = TypeSig, + Es = lists:duplicate(Arity, A0), + core_lib:make_values(Es); + _ -> + delay_build_expr(A0, TypeSig) end, Rec#c_receive{clauses=Cs,action=A}; delay_build_expr_1(#c_seq{body=B0}=Seq, TypeSig) -> diff --git a/lib/compiler/src/v3_codegen.erl b/lib/compiler/src/v3_codegen.erl index b222b25d7c..8189420c1c 100644 --- a/lib/compiler/src/v3_codegen.erl +++ b/lib/compiler/src/v3_codegen.erl @@ -77,10 +77,15 @@ functions(Forms, AtomMod) -> function(#k_fdef{anno=#k{a=Anno},func=Name,arity=Arity, vars=As,body=Kb}, AtomMod, St0) -> try - %% Annotate kernel records with variable usage. #k_match{} = Kb, %Assertion. + + %% Try to suppress the stack frame unless it is + %% really needed. + Body0 = avoid_stack_frame(Kb), + + %% Annotate kernel records with variable usage. Vdb0 = init_vars(As), - {Body,_,Vdb} = body(Kb, 1, Vdb0), + {Body,_,Vdb} = body(Body0, 1, Vdb0), %% Generate the BEAM assembly code. {Asm,EntryLabel,St} = cg_fun(Body, As, Vdb, AtomMod, @@ -88,12 +93,117 @@ function(#k_fdef{anno=#k{a=Anno},func=Name,arity=Arity, Func = {function,Name,Arity,EntryLabel,Asm}, {Func,St} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. + +%% avoid_stack_frame(Kernel) -> Kernel' +%% If possible, avoid setting up a stack frame. Functions +%% that only do matching, calls to guard BIFs, and tail-recursive +%% calls don't need a stack frame. + +avoid_stack_frame(#k_match{body=Body}=M) -> + try + M#k_match{body=avoid_stack_frame_1(Body)} + catch + impossible -> + M + end. + +avoid_stack_frame_1(#k_alt{first=First0,then=Then0}=Alt) -> + First = avoid_stack_frame_1(First0), + Then = avoid_stack_frame_1(Then0), + Alt#k_alt{first=First,then=Then}; +avoid_stack_frame_1(#k_bif{op=Op}=Bif) -> + case Op of + #k_internal{} -> + %% Most internal BIFs clobber the X registers. + throw(impossible); + _ -> + Bif + end; +avoid_stack_frame_1(#k_break{anno=Anno,args=Args}) -> + #k_guard_break{anno=Anno,args=Args}; +avoid_stack_frame_1(#k_guard_break{}=Break) -> + Break; +avoid_stack_frame_1(#k_enter{}=Enter) -> + %% Tail-recursive calls don't need a stack frame. + Enter; +avoid_stack_frame_1(#k_guard{clauses=Cs0}=Guard) -> + Cs = avoid_stack_frame_list(Cs0), + Guard#k_guard{clauses=Cs}; +avoid_stack_frame_1(#k_guard_clause{guard=G0,body=B0}=C) -> + G = avoid_stack_frame_1(G0), + B = avoid_stack_frame_1(B0), + C#k_guard_clause{guard=G,body=B}; +avoid_stack_frame_1(#k_match{anno=A,vars=Vs,body=B0,ret=Ret}) -> + %% Use #k_guard_match{} instead to avoid saving the X registers + %% to the stack before matching. + B = avoid_stack_frame_1(B0), + #k_guard_match{anno=A,vars=Vs,body=B,ret=Ret}; +avoid_stack_frame_1(#k_guard_match{body=B0}=M) -> + B = avoid_stack_frame_1(B0), + M#k_guard_match{body=B}; +avoid_stack_frame_1(#k_protected{arg=Arg0}=Prot) -> + Arg = avoid_stack_frame_1(Arg0), + Prot#k_protected{arg=Arg}; +avoid_stack_frame_1(#k_put{}=Put) -> + Put; +avoid_stack_frame_1(#k_return{}=Ret) -> + Ret; +avoid_stack_frame_1(#k_select{var=#k_var{anno=Vanno},types=Types0}=Select) -> + case member(reuse_for_context, Vanno) of + false -> + Types = avoid_stack_frame_list(Types0), + Select#k_select{types=Types}; + true -> + %% Including binary patterns that overwrite the register containing + %% the binary with the match context may not be safe. For example, + %% bs_match_SUITE:bin_tail_e/1 with inlining will be rejected by + %% beam_validator. + %% + %% Essentially the following code is produced: + %% + %% bs_match {x,0} => {x,0} + %% ... + %% bs_match {x,0} => {x,1} %% ILLEGAL + %% + %% A bs_match instruction will only accept a match context as the + %% source operand if the source and destination registers are the + %% the same (as in the first bs_match instruction above). + %% The second bs_match instruction is therefore illegal. + %% + %% This situation is avoided if there is a stack frame: + %% + %% move {x,0} => {y,0} + %% bs_match {x,0} => {x,0} + %% ... + %% bs_match {y,0} => {x,1} %% LEGAL + %% + throw(impossible) + end; +avoid_stack_frame_1(#k_seq{arg=A0,body=B0}=Seq) -> + A = avoid_stack_frame_1(A0), + B = avoid_stack_frame_1(B0), + Seq#k_seq{arg=A,body=B}; +avoid_stack_frame_1(#k_test{}=Test) -> + Test; +avoid_stack_frame_1(#k_type_clause{values=Values0}=TC) -> + Values = avoid_stack_frame_list(Values0), + TC#k_type_clause{values=Values}; +avoid_stack_frame_1(#k_val_clause{body=B0}=VC) -> + B = avoid_stack_frame_1(B0), + VC#k_val_clause{body=B}; +avoid_stack_frame_1(_Body) -> + throw(impossible). + +avoid_stack_frame_list([H|T]) -> + [avoid_stack_frame_1(H)|avoid_stack_frame_list(T)]; +avoid_stack_frame_list([]) -> []. + + %% This pass creates beam format annotated with variable lifetime %% information. Each thing is given an index and for each variable we %% store the first and last index for its occurrence. The variable @@ -219,10 +329,8 @@ expr(#k_put{anno=A}=Put, I, _Vdb) -> Put#k_put{anno=#l{i=I,a=A#k.a}}; expr(#k_break{anno=A}=Break, I, _Vdb) -> Break#k_break{anno=#l{i=I,a=A#k.a}}; -expr(#k_guard_break{anno=A}=Break, I, Vdb) -> - Locked = [V || {V,_,_} <- Vdb], - L = #l{i=I,a=A#k.a}, - Break#k_guard_break{anno=L,locked=Locked}; +expr(#k_guard_break{anno=A}=Break, I, _Vdb) -> + Break#k_guard_break{anno=#l{i=I,a=A#k.a}}; expr(#k_return{anno=A}=Ret, I, _Vdb) -> Ret#k_return{anno=#l{i=I,a=A#k.a}}. @@ -246,14 +354,9 @@ match(#k_alt{anno=A,first=Kf,then=Kt}, Ls, I, Vdb0) -> F = match(Kf, Ls, I+1, Vdb1), T = match(Kt, Ls, I+1, Vdb1), #k_alt{anno=[],first=F,then=T}; -match(#k_select{anno=A,var=V,types=Kts}=Select, Ls0, I, Vdb0) -> - Vanno = get_kanno(V), - Ls1 = case member(no_usage, Vanno) of - false -> add_element(V#k_var.name, Ls0); - true -> Ls0 - end, - Vdb1 = use_vars(union(A#k.us, Ls1), I, Vdb0), - Ts = [type_clause(Tc, Ls1, I+1, Vdb1) || Tc <- Kts], +match(#k_select{anno=A,types=Kts}=Select, Ls, I, Vdb0) -> + Vdb1 = use_vars(union(A#k.us, Ls), I, Vdb0), + Ts = [type_clause(Tc, Ls, I+1, Vdb1) || Tc <- Kts], Select#k_select{anno=[],types=Ts}; match(#k_guard{anno=A,clauses=Kcs}, Ls, I, Vdb0) -> Vdb1 = use_vars(union(A#k.us, Ls), I, Vdb0), @@ -388,8 +491,8 @@ cg(#k_return{anno=Le,args=Rs}, Vdb, Bef, St) -> return_cg(Rs, Le, Vdb, Bef, St); cg(#k_break{anno=Le,args=Bs}, Vdb, Bef, St) -> break_cg(Bs, Le, Vdb, Bef, St); -cg(#k_guard_break{anno=Le,args=Bs,locked=N}, Vdb, Bef, St) -> - guard_break_cg(Bs, N, Le, Vdb, Bef, St); +cg(#k_guard_break{anno=Le,args=Bs}, Vdb, Bef, St) -> + guard_break_cg(Bs, Le, Vdb, Bef, St); cg(#cg_need_heap{h=H}, _Vdb, Bef, St) -> {[{test_heap,H,max_reg(Bef#sr.reg)}],Bef,St}. @@ -487,7 +590,10 @@ match_cg(M, Rs, Le, Vdb, Bef, St0) -> guard_match_cg(M, Rs, Le, Vdb, Bef, St0) -> I = Le#l.i, {B,St1} = new_label(St0), - #cg{bfail=Fail} = St1, + Fail = case St0 of + #cg{bfail=0,ultimate_failure=Fail0} -> Fail0; + #cg{bfail=Fail0} -> Fail0 + end, {Mis,Aft,St2} = match_cg(M, Fail, Bef, St1#cg{break=B}), %% Update the register descriptors for the return registers. Reg = guard_match_regs(Aft#sr.reg, Rs), @@ -593,9 +699,6 @@ bsm_rename_ctx(#k_protected{arg=Ts0}=Prot, Old, New, _InProt) -> InProt = true, Ts = bsm_rename_ctx_list(Ts0, Old, New, InProt), bsm_forget_var(Prot#k_protected{arg=Ts}, Old); -bsm_rename_ctx(#k_match{body=Ms0}=Match, Old, New, InProt) -> - Ms = bsm_rename_ctx(Ms0, Old, New, InProt), - Match#k_match{body=Ms}; bsm_rename_ctx(#k_guard_match{body=Ms0}=Match, Old, New, InProt) -> Ms = bsm_rename_ctx(Ms0, Old, New, InProt), Match#k_guard_match{body=Ms}; @@ -612,9 +715,8 @@ bsm_rename_ctx(#cg_block{es=Es0}=Block, Old, New, true) -> %% inside the block. Es = bsm_rename_ctx_list(Es0, Old, New, true), bsm_forget_var(Block#cg_block{es=Es}, Old); -bsm_rename_ctx(#k_guard_break{locked=Locked0}=Break, Old, _New, _InProt) -> - Locked = Locked0 -- [Old], - bsm_forget_var(Break#k_guard_break{locked=Locked}, Old). +bsm_rename_ctx(#k_guard_break{}=Break, Old, _New, _InProt) -> + bsm_forget_var(Break, Old). bsm_rename_ctx_list([C|Cs], Old, New, InProt) -> [bsm_rename_ctx(C, Old, New, InProt)| @@ -1378,8 +1480,6 @@ guard_clause_cg(#k_guard_clause{anno=#l{vdb=Vdb},guard=G,body=B}, Fail, Bef, St0 guard_cg(#k_protected{arg=Ts,ret=Rs,anno=#l{i=I,vdb=Pdb}}, Fail, _Vdb, Bef, St) -> protected_cg(Ts, Rs, Fail, I, Pdb, Bef, St); -guard_cg(#cg_block{es=Ts,anno=#l{i=I,vdb=Bdb}}, Fail, _Vdb, Bef, St) -> - guard_cg_list(Ts, Fail, I, Bdb, Bef, St); guard_cg(#k_test{anno=#l{i=I},op=Test0,args=As,inverted=Inverted}, Fail, Vdb, Bef, St0) -> #k_remote{mod=#k_atom{val=erlang},name=#k_atom{val=Test}} = Test0, @@ -1397,6 +1497,18 @@ guard_cg(G, _Fail, Vdb, Bef, St) -> %%ok = io:fwrite("cg ~w: ~p~n", [?LINE,{Aft}]), {Gis,Aft,St1}. +%% guard_cg_list([Kexpr], Fail, I, Vdb, StackReg, St) -> +%% {[Ainstr],StackReg,St}. + +guard_cg_list(Kes, Fail, I, Vdb, Bef, St0) -> + {Keis,{Aft,St1}} = + flatmapfoldl(fun (Ke, {Inta,Sta}) -> + {Keis,Intb,Stb} = + guard_cg(Ke, Fail, Vdb, Inta, Sta), + {Keis,{Intb,Stb}} + end, {Bef,St0}, need_heap(Kes, I)), + {Keis,Aft,St1}. + %% protected_cg([Kexpr], [Ret], Fail, I, Vdb, Bef, St) -> {[Ainstr],Aft,St}. %% Do a protected. Protecteds without return values are just done %% for effect, the return value is not checked, success passes on to @@ -1453,18 +1565,6 @@ test_cg(Test, As, Fail, I, Vdb, Bef, St) -> Aft = clear_dead(Bef, I, Vdb), {[beam_utils:bif_to_test(Test, Args, {f,Fail})],Aft,St}. -%% guard_cg_list([Kexpr], Fail, I, Vdb, StackReg, St) -> -%% {[Ainstr],StackReg,St}. - -guard_cg_list(Kes, Fail, I, Vdb, Bef, St0) -> - {Keis,{Aft,St1}} = - flatmapfoldl(fun (Ke, {Inta,Sta}) -> - {Keis,Intb,Stb} = - guard_cg(Ke, Fail, Vdb, Inta, Sta), - {Keis,{Intb,Stb}} - end, {Bef,St0}, need_heap(Kes, I)), - {Keis,Aft,St1}. - %% match_fmf(Fun, LastFail, State, [Clause]) -> {Is,Aft,State}. %% This is a special flatmapfoldl for match code gen where we %% generate a "failure" label for each clause. The last clause uses @@ -1685,6 +1785,11 @@ internal_cg(bs_init_writable=I, As, Rs, Le, Vdb, Bef, St) -> {Sis,Int} = cg_setup_call(As, Bef, Le#l.i, Vdb), Reg = load_vars(Rs, clear_regs(Int#sr.reg)), {Sis++[I],clear_dead(Int#sr{reg=Reg}, Le#l.i, Vdb),St}; +internal_cg(build_stacktrace=I, As, Rs, Le, Vdb, Bef, St) -> + %% This behaves like a function call. + {Sis,Int} = cg_setup_call(As, Bef, Le#l.i, Vdb), + Reg = load_vars(Rs, clear_regs(Int#sr.reg)), + {Sis++[I],clear_dead(Int#sr{reg=Reg}, Le#l.i, Vdb),St}; internal_cg(raise, As, Rs, Le, Vdb, Bef, St) -> %% raise can be treated like a guard BIF. bif_cg(raise, As, Rs, Le, Vdb, Bef, St). @@ -2226,13 +2331,12 @@ break_cg(Bs, Le, Vdb, Bef, St) -> {Ms ++ [{jump,{f,St#cg.break}}], Int#sr{reg=clear_regs(Int#sr.reg)},St}. -guard_break_cg(Bs, Locked, #l{i=I}, Vdb, #sr{reg=Reg0}=Bef, St) -> - RegLocked = get_locked_regs(Reg0, Locked), - #sr{reg=Reg1} = Int = clear_dead(Bef#sr{reg=RegLocked}, I, Vdb), +guard_break_cg(Bs, #l{i=I}, Vdb, #sr{reg=Reg0}=Bef, St) -> + #sr{reg=Reg1} = Int = clear_dead(Bef, I, Vdb), Reg2 = trim_free(Reg1), NumLocked = length(Reg2), Moves0 = gen_moves(Bs, Bef, NumLocked, []), - Moves = order_moves(Moves0, find_scratch_reg(RegLocked)), + Moves = order_moves(Moves0, find_scratch_reg(Reg0)), {BreakVars,_} = mapfoldl(fun(_, RegNum) -> {{RegNum,gbreakvar},RegNum+1} end, length(Reg2), Bs), @@ -2240,20 +2344,6 @@ guard_break_cg(Bs, Locked, #l{i=I}, Vdb, #sr{reg=Reg0}=Bef, St) -> Aft = Int#sr{reg=Reg}, {Moves ++ [{jump,{f,St#cg.break}}],Aft,St}. -get_locked_regs([R|Rs0], Preserve) -> - case {get_locked_regs(Rs0, Preserve),R} of - {[],{_,V}} -> - case lists:member(V, Preserve) of - true -> [R]; - false -> [] - end; - {[],_} -> - []; - {Rs,_} -> - [R|Rs] - end; -get_locked_regs([], _) -> []. - %% cg_reg_arg(Arg0, Info) -> Arg %% cg_reg_args([Arg0], Info) -> [Arg] %% Convert argument[s] into registers. Literal values are returned unchanged. diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl index 20cb3343fb..6029b91cdc 100644 --- a/lib/compiler/src/v3_core.erl +++ b/lib/compiler/src/v3_core.erl @@ -920,8 +920,9 @@ try_exception(Ecs0, St0) -> %% Note that Tag is not needed for rethrow - it is already in Info. {Evs,St1} = new_vars(3, St0), % Tag, Value, Info {Ecs1,Ceps,St2} = clauses(Ecs0, St1), + Ecs2 = try_build_stacktrace(Ecs1, hd(Evs)), [_,Value,Info] = Evs, - LA = case Ecs1 of + LA = case Ecs2 of [] -> []; [C|_] -> get_lineno_anno(C) end, @@ -930,7 +931,7 @@ try_exception(Ecs0, St0) -> body=[#iprimop{anno=#a{}, %Must have an #a{} name=#c_literal{val=raise}, args=[Info,Value]}]}, - Hs = [#icase{anno=#a{anno=LA},args=[c_tuple(Evs)],clauses=Ecs1,fc=Ec}], + Hs = [#icase{anno=#a{anno=LA},args=[c_tuple(Evs)],clauses=Ecs2,fc=Ec}], {Evs,Ceps++Hs,St2}. try_after(As, St0) -> @@ -946,6 +947,25 @@ try_after(As, St0) -> Hs = [#icase{anno=#a{},args=[c_tuple(Evs)],clauses=[],fc=Ec}], {Evs,Hs,St1}. +try_build_stacktrace([#iclause{pats=Ps0,body=B0}=C0|Cs], RawStk) -> + [#c_tuple{es=[Class,Exc,Stk]}=Tup] = Ps0, + case Stk of + #c_var{name='_'} -> + %% Stacktrace variable is not used. Nothing to do. + [C0|try_build_stacktrace(Cs, RawStk)]; + _ -> + %% Add code to build the stacktrace. + Ps = [Tup#c_tuple{es=[Class,Exc,RawStk]}], + Call = #iprimop{anno=#a{}, + name=#c_literal{val=build_stacktrace}, + args=[RawStk]}, + Iset = #iset{var=Stk,arg=Call}, + B = [Iset|B0], + C = C0#iclause{pats=Ps,body=B}, + [C|try_build_stacktrace(Cs, RawStk)] + end; +try_build_stacktrace([], _) -> []. + %% expr_bin([ArgExpr], St) -> {[Arg],[PreExpr],St}. %% Flatten the arguments of a bin. Do this straight left to right! %% Note that ibinary needs to have its annotation wrapped in a #a{} @@ -2462,9 +2482,11 @@ cexpr(#icase{anno=A,args=Largs,clauses=Lcs,fc=Lfc}, As, St0) -> cexpr(#ireceive1{anno=A,clauses=Lcs}, As, St0) -> Exp = intersection(A#a.ns, As), %Exports {Ccs,St1} = cclauses(Lcs, Exp, St0), + True = #c_literal{val=true}, + Action = core_lib:make_values(lists:duplicate(1+length(Exp), True)), {#c_receive{anno=A#a.anno, clauses=Ccs, - timeout=#c_literal{val=infinity},action=#c_literal{val=true}}, + timeout=#c_literal{val=infinity},action=Action}, Exp,A#a.us,St1}; cexpr(#ireceive2{anno=A,clauses=Lcs,timeout=Lto,action=Les}, As, St0) -> Exp = intersection(A#a.ns, As), %Exports diff --git a/lib/compiler/src/v3_kernel.erl b/lib/compiler/src/v3_kernel.erl index 3eea058153..fd73e5a7dc 100644 --- a/lib/compiler/src/v3_kernel.erl +++ b/lib/compiler/src/v3_kernel.erl @@ -108,6 +108,7 @@ copy_anno(Kdst, Ksrc) -> -record(iclause, {anno=[],isub,osub,pats,guard,body}). -record(ireceive_accept, {anno=[],arg}). -record(ireceive_next, {anno=[],arg}). +-record(ignored, {anno=[]}). -type warning() :: term(). % XXX: REFINE @@ -162,8 +163,7 @@ function({#c_var{name={F,Arity}=FA},Body}, St0) -> %%B1 = B0, St3 = St2, %Null second pass {make_fdef(#k{us=[],ns=[],a=Ab}, F, Arity, Kvs, B1),St3} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [F,Arity]), erlang:raise(Class, Error, Stack) end. @@ -489,7 +489,7 @@ make_alt(First0, Then0) -> Then1 = pre_seq(droplast(Then0), last(Then0)), First2 = make_protected(First1), Then2 = make_protected(Then1), - Body = #k_atom{val=ignored}, + Body = #ignored{}, First3 = #k_guard_clause{guard=First2,body=Body}, Then3 = #k_guard_clause{guard=Then2,body=Body}, First = #k_guard{clauses=[First3]}, @@ -2225,7 +2225,9 @@ ubody(E, return, St0) -> {Ea,Pa,St1} = force_atomic(E, St0), ubody(pre_seq(Pa, #ivalues{args=[Ea]}), return, St1) end; -ubody(E, {break,_Rs} = Break, St0) -> +ubody(#ignored{}, {break,_} = Break, St) -> + ubody(#ivalues{args=[]}, Break, St); +ubody(E, {break,[_]} = Break, St0) -> %%ok = io:fwrite("ubody ~w:~p~n", [?LINE,{E,Br}]), %% Exiting expressions need no trailing break. case is_exit_expr(E) of @@ -2233,6 +2235,16 @@ ubody(E, {break,_Rs} = Break, St0) -> false -> {Ea,Pa,St1} = force_atomic(E, St0), ubody(pre_seq(Pa, #ivalues{args=[Ea]}), Break, St1) + end; +ubody(E, {break,Rs}=Break, St0) -> + case is_exit_expr(E) of + true -> + uexpr(E, return, St0); + false -> + {Vs,St1} = new_vars(length(Rs), St0), + Iset = #iset{vars=Vs,arg=E}, + PreSeq = pre_seq([Iset], #ivalues{args=Vs}), + ubody(PreSeq, Break, St1) end. iletrec_funs(#iletrec{defs=Fs}, St0) -> diff --git a/lib/compiler/src/v3_kernel.hrl b/lib/compiler/src/v3_kernel.hrl index 87011b7680..7cd30b25a8 100644 --- a/lib/compiler/src/v3_kernel.hrl +++ b/lib/compiler/src/v3_kernel.hrl @@ -79,7 +79,7 @@ -record(k_guard_clause, {anno=[],guard,body}). -record(k_break, {anno=[],args=[]}). --record(k_guard_break, {anno=[],args=[],locked=[]}). +-record(k_guard_break, {anno=[],args=[]}). -record(k_return, {anno=[],args=[]}). %%k_get_anno(Thing) -> element(2, Thing). |