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author | Björn Gustavsson <[email protected]> | 2017-08-17 06:49:22 +0200 |
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committer | Björn Gustavsson <[email protected]> | 2017-08-23 05:57:38 +0200 |
commit | cbeeed095739223a425649f6085b6959ad905c83 (patch) | |
tree | ed58bc08a28edf53172656d36acb528a014b348d /erts | |
parent | 7f7905f653170daf8a185636329701486fec4ad8 (diff) | |
download | otp-cbeeed095739223a425649f6085b6959ad905c83.tar.gz otp-cbeeed095739223a425649f6085b6959ad905c83.tar.bz2 otp-cbeeed095739223a425649f6085b6959ad905c83.zip |
beam_makeops: Introduce the new type 'W' (machine word)
As a preparation for potentially improving packing in the future,
we will need to make sure that packable types have a defined maximum
size.
The packer algorithm assumes that two 'I' operands can be packed
into one 64-bit word, but there are instructions that use an 'I'
operand to store a pointer. It only works because those instructions
are not packed for other reasons.
Introduce the 'W' type and use it for operands that don't fit in
32 bits.
Diffstat (limited to 'erts')
-rw-r--r-- | erts/emulator/beam/beam_debug.c | 15 | ||||
-rw-r--r-- | erts/emulator/beam/beam_load.c | 33 | ||||
-rw-r--r-- | erts/emulator/beam/ops.tab | 42 | ||||
-rw-r--r-- | erts/emulator/test/tuple_SUITE.erl | 7 | ||||
-rwxr-xr-x | erts/emulator/utils/beam_makeops | 8 |
5 files changed, 68 insertions, 37 deletions
diff --git a/erts/emulator/beam/beam_debug.c b/erts/emulator/beam/beam_debug.c index afe87288ce..15b18f0667 100644 --- a/erts/emulator/beam/beam_debug.c +++ b/erts/emulator/beam/beam_debug.c @@ -522,12 +522,13 @@ print_op(fmtfn_t to, void *to_arg, int op, int size, BeamInstr* addr) } ap++; break; - case 'I': /* Untagged integer. */ - case 't': + case 't': /* Untagged integers */ + case 'I': + case 'W': switch (op) { - case op_i_gc_bif1_jIsId: - case op_i_gc_bif2_jIIssd: - case op_i_gc_bif3_jIIssd: + case op_i_gc_bif1_jWsId: + case op_i_gc_bif2_jWIssd: + case op_i_gc_bif3_jWIssd: { const ErtsGcBif* p; BifFunction gcf = (BifFunction) *ap; @@ -672,8 +673,8 @@ print_op(fmtfn_t to, void *to_arg, int op, int size, BeamInstr* addr) } } break; - case op_i_jump_on_val_xfII: - case op_i_jump_on_val_yfII: + case op_i_jump_on_val_xfIW: + case op_i_jump_on_val_yfIW: { int n; for (n = ap[-2]; n > 0; n--) { diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c index 2ab91926ad..98701db558 100644 --- a/erts/emulator/beam/beam_load.c +++ b/erts/emulator/beam/beam_load.c @@ -2388,11 +2388,29 @@ load_code(LoaderState* stp) break; } break; - case 'I': /* Untagged integer (or pointer). */ - VerifyTag(stp, tag, TAG_u); - code[ci++] = tmp_op->a[arg].val; - break; - case 't': /* Small untagged integer -- can be packed. */ + case 't': /* Small untagged integer (16 bits) -- can be packed. */ + case 'I': /* Untagged integer (32 bits) -- can be packed. */ + case 'W': /* Untagged integer or pointer (machine word). */ +#ifdef DEBUG + switch (*sign) { + case 't': + if (tmp_op->a[arg].val >> 16 != 0) { + load_printf(__LINE__, stp, "value %lu of type 't' does not fit in 16 bits", + tmp_op->a[arg].val); + ASSERT(0); + } + break; +#ifdef ARCH_64 + case 'I': + if (tmp_op->a[arg].val >> 32 != 0) { + load_printf(__LINE__, stp, "value %lu of type 'I' does not fit in 32 bits", + tmp_op->a[arg].val); + ASSERT(0); + } + break; +#endif + } +#endif VerifyTag(stp, tag, TAG_u); code[ci++] = tmp_op->a[arg].val; break; @@ -2627,8 +2645,8 @@ load_code(LoaderState* stp) /* Remember offset for the on_load function. */ stp->on_load = ci; break; - case op_bs_put_string_II: - case op_i_bs_match_string_xfII: + case op_bs_put_string_WW: + case op_i_bs_match_string_xfWW: new_string_patch(stp, ci-1); break; @@ -2884,6 +2902,7 @@ gen_element(LoaderState* stp, GenOpArg Fail, GenOpArg Index, op->next = NULL; if (Index.type == TAG_i && Index.val > 0 && + Index.val <= ERTS_MAX_TUPLE_SIZE && (Tuple.type == TAG_x || Tuple.type == TAG_y)) { op->op = genop_i_fast_element_4; op->a[0] = Tuple; diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab index 955eecd115..09fad05ffd 100644 --- a/erts/emulator/beam/ops.tab +++ b/erts/emulator/beam/ops.tab @@ -167,7 +167,7 @@ i_select_tuple_arity2 xy f A A f f i_jump_on_val_zero xy f I -i_jump_on_val xy f I I +i_jump_on_val xy f I W get_list xy xy xy @@ -971,6 +971,8 @@ node x node y %hot +# Note: 'I' is sufficient because this instruction will only be used +# if the arity fits in 24 bits. i_fast_element xy j I d i_element xy j s d @@ -1026,7 +1028,7 @@ i_call_fun_last I P make_fun2 OldIndex=u => gen_make_fun2(OldIndex) %cold -i_make_fun I t +i_make_fun W t %hot is_function f xy @@ -1052,14 +1054,14 @@ i_bs_restore2 x I # Matching integers bs_match_string Fail Ms Bits Val => i_bs_match_string Ms Fail Bits Val -i_bs_match_string x f I I +i_bs_match_string x f W W # Fetching integers from binaries. bs_get_integer2 Fail=f Ms=x Live=u Sz=sq Unit=u Flags=u Dst=d => \ gen_get_integer2(Fail, Ms, Live, Sz, Unit, Flags, Dst) -i_bs_get_integer_small_imm x I f I x -i_bs_get_integer_imm x I I f I x +i_bs_get_integer_small_imm x W f t x +i_bs_get_integer_imm x W t f t x i_bs_get_integer f I I s s x i_bs_get_integer_8 x f x i_bs_get_integer_16 x f x @@ -1072,7 +1074,7 @@ i_bs_get_integer_32 x f x bs_get_binary2 Fail=f Ms=x Live=u Sz=sq Unit=u Flags=u Dst=d => \ gen_get_binary2(Fail, Ms, Live, Sz, Unit, Flags, Dst) -i_bs_get_binary_imm2 f x I I I x +i_bs_get_binary_imm2 f x t W t x i_bs_get_binary2 f x I s I x i_bs_get_binary_all2 f x I I x i_bs_get_binary_all_reuse x f I @@ -1090,14 +1092,14 @@ i_bs_get_float2 f x I s I x bs_skip_bits2 Fail=f Ms=x Sz=sq Unit=u Flags=u => \ gen_skip_bits2(Fail, Ms, Sz, Unit, Flags) -i_bs_skip_bits_imm2 f x I +i_bs_skip_bits_imm2 f x W i_bs_skip_bits2 f x xy I i_bs_skip_bits_all2 f x I bs_test_tail2 Fail=f Ms=x Bits=u==0 => bs_test_zero_tail2 Fail Ms bs_test_tail2 Fail=f Ms=x Bits=u => bs_test_tail_imm2 Fail Ms Bits bs_test_zero_tail2 f x -bs_test_tail_imm2 f x I +bs_test_tail_imm2 f x W bs_test_unit F Ms Unit=u==8 => bs_test_unit8 F Ms bs_test_unit f x I @@ -1154,9 +1156,9 @@ i_bs_init_fail xy j I x i_bs_init_fail_heap s I j I x -i_bs_init I I x +i_bs_init W t x -i_bs_init_heap I I I x +i_bs_init_heap W I t x bs_init_bits Fail Sz=o Words Regs Flags Dst => system_limit Fail @@ -1173,8 +1175,8 @@ i_bs_init_bits_fail xy j I x i_bs_init_bits_fail_heap s I j I x -i_bs_init_bits I I x -i_bs_init_bits_heap I I I x +i_bs_init_bits W t x +i_bs_init_bits_heap W I t x bs_add Fail S1=i==0 S2 Unit=u==1 D => move S2 D @@ -1199,7 +1201,7 @@ bs_put_integer Fail=j Sz=sq Unit=u Flags=u Src=s => \ gen_put_integer(Fail, Sz, Unit, Flags, Src) i_new_bs_put_integer j s I s -i_new_bs_put_integer_imm j I I s +i_new_bs_put_integer_imm j W t s # # Utf8/utf16/utf32 support. (R12B-5) @@ -1233,7 +1235,7 @@ bs_put_float Fail=j Sz=s Unit=u Flags=u Src=s => \ gen_put_float(Fail, Sz, Unit, Flags, Src) i_new_bs_put_float j s I s -i_new_bs_put_float_imm j I I s +i_new_bs_put_float_imm j W I s # # Storing binaries into binaries. @@ -1243,7 +1245,7 @@ bs_put_binary Fail=j Sz=s Unit=u Flags=u Src=s => \ gen_put_binary(Fail, Sz, Unit, Flags, Src) i_new_bs_put_binary j s I s -i_new_bs_put_binary_imm j I s +i_new_bs_put_binary_imm j W s i_new_bs_put_binary_all j s I # @@ -1252,7 +1254,7 @@ i_new_bs_put_binary_all j s I # Don't change the instruction format unless you change the loader too. # -bs_put_string I I +bs_put_string W W # # New floating point instructions (R8). @@ -1450,7 +1452,7 @@ gc_bif2 Fail Live u$bif:erlang:bxor/2 S1 S2 Dst => \ gc_bif1 Fail I u$bif:erlang:bnot/1 Src Dst=d => i_int_bnot Fail Src I Dst -i_increment rxy I I d +i_increment rxy W t d i_plus x xy j I d i_plus s s j I d @@ -1499,9 +1501,9 @@ gc_bif2 Fail I Bif S1 S2 Dst => \ gc_bif3 Fail I Bif S1 S2 S3 Dst => \ gen_guard_bif3(Fail, I, Bif, S1, S2, S3, Dst) -i_gc_bif1 j I s I d +i_gc_bif1 j W s I d -i_gc_bif2 j I I s s d +i_gc_bif2 j W I s s d ii_gc_bif3/7 @@ -1510,7 +1512,7 @@ ii_gc_bif3/7 ii_gc_bif3 Fail Bif Live S1 S2 S3 Dst => \ move S1 x | i_gc_bif3 Fail Bif Live S2 S3 Dst -i_gc_bif3 j I I s s d +i_gc_bif3 j W I s s d # # The following instruction is specially handled in beam_load.c diff --git a/erts/emulator/test/tuple_SUITE.erl b/erts/emulator/test/tuple_SUITE.erl index 79b681b4d1..baf41180e0 100644 --- a/erts/emulator/test/tuple_SUITE.erl +++ b/erts/emulator/test/tuple_SUITE.erl @@ -134,6 +134,13 @@ t_element(Config) when is_list(Config) -> {'EXIT', {badarg, _}} = (catch element(1, id(42))), {'EXIT', {badarg, _}} = (catch element(id(1.5), id({a,b}))), + %% Make sure that the loader does not reject the module when + %% huge literal index values are used. + {'EXIT', {badarg, _}} = (catch element((1 bsl 24)-1, id({a,b,c}))), + {'EXIT', {badarg, _}} = (catch element(1 bsl 24, id({a,b,c}))), + {'EXIT', {badarg, _}} = (catch element(1 bsl 32, id({a,b,c}))), + {'EXIT', {badarg, _}} = (catch element(1 bsl 64, id({a,b,c}))), + ok. get_elements([Element|Rest], Tuple, Pos) -> diff --git a/erts/emulator/utils/beam_makeops b/erts/emulator/utils/beam_makeops index bbc487dd61..4108138b51 100755 --- a/erts/emulator/utils/beam_makeops +++ b/erts/emulator/utils/beam_makeops @@ -149,8 +149,9 @@ my %arg_size = ('r' => 0, # x(0) - x register zero 'j' => 1, # either 'f' or 'p' 'e' => 1, # pointer to export entry 'L' => 0, # label - 'I' => 1, # untagged integer - 't' => 1, # untagged integer -- can be packed + 't' => 1, # untagged integer (12 bits) -- can be packed + 'I' => 1, # untagged integer (32 bits) -- can be packed + 'W' => 1, # untagged integer/pointer (one word) 'b' => 1, # pointer to bif 'A' => 1, # arity value 'P' => 1, # byte offset into tuple or stack @@ -195,8 +196,9 @@ sub define_type_bit { define_type_bit('j', $type_bit{'f'} | $type_bit{'p'}); # Aliases (for matching purposes). - define_type_bit('I', $type_bit{'u'}); define_type_bit('t', $type_bit{'u'}); + define_type_bit('I', $type_bit{'u'}); + define_type_bit('W', $type_bit{'u'}); define_type_bit('A', $type_bit{'u'}); define_type_bit('L', $type_bit{'u'}); define_type_bit('b', $type_bit{'u'}); |