diff options
| -rw-r--r-- | lib/compiler/src/beam_jump.erl | 24 | ||||
| -rw-r--r-- | lib/compiler/test/trycatch_SUITE.erl | 17 |
2 files changed, 39 insertions, 2 deletions
diff --git a/lib/compiler/src/beam_jump.erl b/lib/compiler/src/beam_jump.erl index 52fe0e90ce..ba71d4efae 100644 --- a/lib/compiler/src/beam_jump.erl +++ b/lib/compiler/src/beam_jump.erl @@ -166,6 +166,12 @@ share_1([{label,L}=Lbl|Is], Dict0, Seq, Acc) -> end; share_1([{func_info,_,_,_}=I|Is], _, [], Acc) -> reverse(Is, [I|Acc]); +share_1([{'try',_,_}=I|Is], Dict0, Seq, Acc) -> + Dict = clean_non_sharable(Dict0), + share_1(Is, Dict, [I|Seq], Acc); +share_1([{try_case,_}=I|Is], Dict0, Seq, Acc) -> + Dict = clean_non_sharable(Dict0), + share_1(Is, Dict, [I|Seq], Acc); share_1([I|Is], Dict, Seq, Acc) -> case is_unreachable_after(I) of false -> @@ -174,6 +180,24 @@ share_1([I|Is], Dict, Seq, Acc) -> share_1(Is, Dict, [I], Acc) end. +clean_non_sharable(Dict) -> + %% We are passing in or out of a 'try' block. Remove + %% sequences that should not shared over the boundaries + %% of a 'try' block. Since the end of the sequence must match, + %% the only possible match between a sequence outside and + %% a sequence inside the 'try' block is a sequence that ends + %% with an instruction that causes an exception. Any sequence + %% that causes an exception must contain a line/1 instruction. + dict:filter(fun(K, _V) -> sharable_with_try(K) end, Dict). + +sharable_with_try([{line,_}|_]) -> + %% This sequence may cause an exception and may potentially + %% match a sequence on the other side of the 'try' block + %% boundary. + false; +sharable_with_try([_|Is]) -> + sharable_with_try(Is); +sharable_with_try([]) -> true. %% Eliminate all fallthroughs. Return the result reversed. diff --git a/lib/compiler/test/trycatch_SUITE.erl b/lib/compiler/test/trycatch_SUITE.erl index 8ab618bb01..80d93fbfa4 100644 --- a/lib/compiler/test/trycatch_SUITE.erl +++ b/lib/compiler/test/trycatch_SUITE.erl @@ -24,7 +24,8 @@ catch_oops/1,after_oops/1,eclectic/1,rethrow/1, nested_of/1,nested_catch/1,nested_after/1, nested_horrid/1,last_call_optimization/1,bool/1, - plain_catch_coverage/1,andalso_orelse/1,get_in_try/1]). + plain_catch_coverage/1,andalso_orelse/1,get_in_try/1, + hockey/1]). -include_lib("test_server/include/test_server.hrl"). @@ -39,7 +40,8 @@ groups() -> [basic,lean_throw,try_of,try_after,catch_oops, after_oops,eclectic,rethrow,nested_of,nested_catch, nested_after,nested_horrid,last_call_optimization, - bool,plain_catch_coverage,andalso_orelse,get_in_try]}]. + bool,plain_catch_coverage,andalso_orelse,get_in_try, + hockey]}]. init_per_suite(Config) -> @@ -943,3 +945,14 @@ get_valid_line([_|T]=Path, Annotations) -> _:not_found -> get_valid_line(T, Annotations) end. + +hockey(_) -> + {'EXIT',{{badmatch,_},[_|_]}} = (catch hockey()), + ok. + +hockey() -> + %% beam_jump used to generate a call into the try block. + %% beam_validator disapproved. + receive _ -> (b = fun() -> ok end) + + hockey, +x after 0 -> ok end, try (a = fun() -> ok end) + hockey, + + y catch _ -> ok end. |