diff options
Diffstat (limited to 'erts/emulator/test/bs_construct_SUITE.erl')
| -rw-r--r-- | erts/emulator/test/bs_construct_SUITE.erl | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/erts/emulator/test/bs_construct_SUITE.erl b/erts/emulator/test/bs_construct_SUITE.erl index cadb30e1a4..7ed99f5b4e 100644 --- a/erts/emulator/test/bs_construct_SUITE.erl +++ b/erts/emulator/test/bs_construct_SUITE.erl @@ -29,7 +29,7 @@ mem_leak/1, coerce_to_float/1, bjorn/1, huge_float_field/1, huge_binary/1, system_limit/1, badarg/1, copy_writable_binary/1, kostis/1, dynamic/1, bs_add/1, - otp_7422/1, zero_width/1, bad_append/1]). + otp_7422/1, zero_width/1, bad_append/1, bs_add_overflow/1]). -include_lib("test_server/include/test_server.hrl"). @@ -40,7 +40,7 @@ all() -> in_guard, mem_leak, coerce_to_float, bjorn, huge_float_field, huge_binary, system_limit, badarg, copy_writable_binary, kostis, dynamic, bs_add, otp_7422, zero_width, - bad_append]. + bad_append, bs_add_overflow]. groups() -> []. @@ -551,10 +551,24 @@ huge_binary(Config) when is_list(Config) -> ?line 16777216 = size(<<0:(id(1 bsl 26)),(-1):(id(1 bsl 26))>>), ?line garbage_collect(), {Shift,Return} = case free_mem() of - undefined -> {32,ok}; - Mb when Mb > 600 -> {32,ok}; - Mb when Mb > 300 -> {31,"Limit huge binaries to 256 Mb"}; - _ -> {30,"Limit huge binary to 128 Mb"} + undefined -> + %% This test has to be inlined inside the case to + %% use a literal Shift + ?line garbage_collect(), + ?line id(<<0:((1 bsl 32)-1)>>), + {32,ok}; + Mb when Mb > 600 -> + ?line garbage_collect(), + ?line id(<<0:((1 bsl 32)-1)>>), + {32,ok}; + Mb when Mb > 300 -> + ?line garbage_collect(), + ?line id(<<0:((1 bsl 31)-1)>>), + {31,"Limit huge binaries to 256 Mb"}; + _ -> + ?line garbage_collect(), + ?line id(<<0:((1 bsl 30)-1)>>), + {30,"Limit huge binary to 128 Mb"} end, ?line garbage_collect(), ?line id(<<0:((1 bsl Shift)-1)>>), @@ -911,5 +925,19 @@ append_unit_8(Bin) -> append_unit_16(Bin) -> <<Bin/binary-unit:16,0:1>>. +%% Produce a large result of bs_add that, if cast to signed int, would overflow +%% into a negative number that fits a smallnum. +bs_add_overflow(Config) -> + case erlang:system_info(wordsize) of + 8 -> + {skip, "64-bit architecture"}; + 4 -> + Large = <<0:((1 bsl 30)-1)>>, + {'EXIT',{system_limit,_}} = + (catch <<Large/bits, Large/bits, Large/bits, Large/bits, + Large/bits, Large/bits, Large/bits, Large/bits, + Large/bits>>), + ok + end. id(I) -> I. |