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-rw-r--r--erts/emulator/test/bs_construct_SUITE.erl4
-rw-r--r--lib/hipe/rtl/hipe_rtl_binary_construct.erl26
-rw-r--r--lib/hipe/rtl/hipe_rtl_binary_match.erl21
-rw-r--r--lib/hipe/test/bs_SUITE_data/bs_construct.erl34
4 files changed, 57 insertions, 28 deletions
diff --git a/erts/emulator/test/bs_construct_SUITE.erl b/erts/emulator/test/bs_construct_SUITE.erl
index f2bd6c233a..7ed99f5b4e 100644
--- a/erts/emulator/test/bs_construct_SUITE.erl
+++ b/erts/emulator/test/bs_construct_SUITE.erl
@@ -925,8 +925,8 @@ append_unit_8(Bin) ->
append_unit_16(Bin) ->
<<Bin/binary-unit:16,0:1>>.
-%% Produce a large result of bs_add that would fit a smallnum if it was viewed
-%% as signed.
+%% 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 ->
diff --git a/lib/hipe/rtl/hipe_rtl_binary_construct.erl b/lib/hipe/rtl/hipe_rtl_binary_construct.erl
index 80436a6931..4403aa552f 100644
--- a/lib/hipe/rtl/hipe_rtl_binary_construct.erl
+++ b/lib/hipe/rtl/hipe_rtl_binary_construct.erl
@@ -386,7 +386,7 @@ not_writable_code(Bin, SizeReg, Dst, Base, Offset, Unit,
hipe_rtl:mk_alu(TotBytes, TotSize, add, ?LOW_BITS),
hipe_rtl:mk_alu(TotBytes, TotBytes, srl, ?BYTE_SHIFT),
hipe_rtl:mk_alu(UsedBytes, TotBytes, sll, hipe_rtl:mk_imm(1)),
- hipe_rtl:mk_branch(UsedBytes, ge, hipe_rtl:mk_imm(256),
+ hipe_rtl:mk_branch(UsedBytes, geu, hipe_rtl:mk_imm(256),
AllLblName, IncLblName),
IncLbl,
hipe_rtl:mk_move(UsedBytes, hipe_rtl:mk_imm(256)),
@@ -432,7 +432,7 @@ realloc_binary(SizeReg, ProcBin, Base) ->
set_field_from_term(ProcBinFlagsTag, ProcBin, Flags),
get_field_from_term(ProcBinValTag, ProcBin, BinPointer),
get_field_from_pointer(BinOrigSizeTag, BinPointer, OrigSize),
- hipe_rtl:mk_branch(OrigSize, 'lt', ResultingSize,
+ hipe_rtl:mk_branch(OrigSize, 'ltu', ResultingSize,
ReallocLblName, NoReallocLblName),
NoReallocLbl,
get_field_from_term(ProcBinBytesTag, ProcBin, Base),
@@ -674,13 +674,13 @@ var_init2(Size, Dst, Base, Offset, TrueLblName, SystemLimitLblName, FalseLblName
[ContLbl,HeapLbl,REFCLbl,NextLbl] = create_lbls(4),
[USize,Tmp] = create_unsafe_regs(2),
[get_word_integer(Size, USize, SystemLimitLblName, FalseLblName),
- hipe_rtl:mk_branch(USize, le, hipe_rtl:mk_imm(?MAX_BINSIZE),
- hipe_rtl:label_name(ContLbl),
- SystemLimitLblName),
+ hipe_rtl:mk_branch(USize, leu, hipe_rtl:mk_imm(?MAX_BINSIZE),
+ hipe_rtl:label_name(ContLbl),
+ SystemLimitLblName),
ContLbl,
hipe_rtl:mk_move(Offset, hipe_rtl:mk_imm(0)),
- hipe_rtl:mk_branch(USize, le, hipe_rtl:mk_imm(?MAX_HEAP_BIN_SIZE),
- hipe_rtl:label_name(HeapLbl),
+ hipe_rtl:mk_branch(USize, leu, hipe_rtl:mk_imm(?MAX_HEAP_BIN_SIZE),
+ hipe_rtl:label_name(HeapLbl),
hipe_rtl:label_name(REFCLbl)),
HeapLbl,
hipe_rtl:mk_alu(Tmp, USize, add, hipe_rtl:mk_imm(3*WordSize-1)),
@@ -698,8 +698,8 @@ var_init2(Size, Dst, Base, Offset, TrueLblName, SystemLimitLblName, FalseLblName
hipe_rtl:mk_goto(TrueLblName)].
var_init_bits(Size, Dst, Base, Offset, TrueLblName, SystemLimitLblName, FalseLblName) ->
- [HeapLbl,REFCLbl,NextLbl,NoSubLbl,SubLbl,ContLbl,
- NoCreateSubBin, CreateSubBin, JoinLbl, JoinLbl2] = create_lbls(10),
+ [HeapLbl,REFCLbl,NextLbl,NoSubLbl,SubLbl,
+ NoCreateSubBin, CreateSubBin, JoinLbl, JoinLbl2] = create_lbls(9),
[USize,ByteSize,TotByteSize,OffsetBits] = create_regs(4),
[TmpDst] = create_unsafe_regs(1),
Log2WordSize = hipe_rtl_arch:log2_word_size(),
@@ -720,11 +720,7 @@ var_init_bits(Size, Dst, Base, Offset, TrueLblName, SystemLimitLblName, FalseLbl
SubLbl,
hipe_rtl:mk_alu(TotByteSize, ByteSize, 'add', hipe_rtl:mk_imm(1)),
JoinLbl,
- hipe_rtl:mk_branch(USize, le, hipe_rtl:mk_imm(?MAX_BINSIZE),
- hipe_rtl:label_name(ContLbl),
- SystemLimitLblName),
- ContLbl,
- hipe_rtl:mk_branch(TotByteSize, 'le', hipe_rtl:mk_imm(?MAX_HEAP_BIN_SIZE),
+ hipe_rtl:mk_branch(TotByteSize, 'leu', hipe_rtl:mk_imm(?MAX_HEAP_BIN_SIZE),
hipe_rtl:label_name(HeapLbl),
hipe_rtl:label_name(REFCLbl)),
HeapLbl,
@@ -983,7 +979,7 @@ copy_string(StringBase, StringSize, BinBase, BinOffset, NewOffset, TrueLblName)
small_check(SizeVar, CopySize, FalseLblName) ->
SuccessLbl = hipe_rtl:mk_new_label(),
- [hipe_rtl:mk_branch(SizeVar, le, CopySize,
+ [hipe_rtl:mk_branch(SizeVar, leu, CopySize,
hipe_rtl:label_name(SuccessLbl), FalseLblName),
SuccessLbl].
diff --git a/lib/hipe/rtl/hipe_rtl_binary_match.erl b/lib/hipe/rtl/hipe_rtl_binary_match.erl
index b385ea6afc..b7c4dc2536 100644
--- a/lib/hipe/rtl/hipe_rtl_binary_match.erl
+++ b/lib/hipe/rtl/hipe_rtl_binary_match.erl
@@ -37,7 +37,6 @@
%%--------------------------------------------------------------------
--define(MAX_BINSIZE, trunc(?MAX_HEAP_BIN_SIZE / hipe_rtl_arch:word_size()) + 2).
-define(BYTE_SHIFT, 3). %% Turn bits into bytes or vice versa
-define(LOW_BITS, 7). %% Three lowest bits set
-define(BYTE_SIZE, 8).
@@ -819,10 +818,10 @@ create_lbls(0) ->
create_lbls(X) when X > 0 ->
[hipe_rtl:mk_new_label()|create_lbls(X-1)].
-make_dyn_prep(SizeReg, CCode) ->
+make_dyn_prep(SizeReg, CCode) ->
[CLbl, SuccessLbl] = create_lbls(2),
- Init = [hipe_rtl:mk_branch(SizeReg, le, hipe_rtl:mk_imm(?MAX_SMALL_BITS),
- hipe_rtl:label_name(SuccessLbl),
+ Init = [hipe_rtl:mk_branch(SizeReg, leu, hipe_rtl:mk_imm(?MAX_SMALL_BITS),
+ hipe_rtl:label_name(SuccessLbl),
hipe_rtl:label_name(CLbl)),
SuccessLbl],
End = [CLbl|CCode],
@@ -867,8 +866,8 @@ get_unaligned_int_to_reg(Reg, Size, Base, Offset, LowBits, Shiftr, Type) ->
hipe_rtl:mk_imm((WordSize-MinLoad)*?BYTE_SIZE))];
{_, WordSize} ->
UnsignedBig = {unsigned, big},
- [hipe_rtl:mk_branch(TotBits, le, hipe_rtl:mk_imm(MinLoad*?BYTE_SIZE),
- hipe_rtl:label_name(LessLbl),
+ [hipe_rtl:mk_branch(TotBits, leu, hipe_rtl:mk_imm(MinLoad*?BYTE_SIZE),
+ hipe_rtl:label_name(LessLbl),
hipe_rtl:label_name(MoreLbl)),
LessLbl,
load_bytes(LoadDst, Base, ByteOffset, Type, MinLoad),
@@ -928,7 +927,7 @@ get_big_unknown_int(Dst1, Base, Offset, NewOffset,
hipe_rtl:mk_alu(ByteOffset, Offset, srl, hipe_rtl:mk_imm(?BYTE_SHIFT)),
load_bytes(LoadDst, Base, ByteOffset, Type, 1),
BackLbl,
- hipe_rtl:mk_branch(ByteOffset, le, Limit, hipe_rtl:label_name(LoopLbl),
+ hipe_rtl:mk_branch(ByteOffset, leu, Limit, hipe_rtl:label_name(LoopLbl),
hipe_rtl:label_name(EndLbl)),
LoopLbl,
load_bytes(Tmp, Base, ByteOffset, {unsigned, big}, 1),
@@ -957,8 +956,8 @@ get_little_unknown_int(Dst1, Base, Offset, NewOffset,
hipe_rtl:mk_alu(Limit, Tmp, srl, hipe_rtl:mk_imm(?BYTE_SHIFT)),
hipe_rtl:mk_move(ShiftReg, hipe_rtl:mk_imm(0)),
BackLbl,
- hipe_rtl:mk_branch(ByteOffset, lt, Limit,
- hipe_rtl:label_name(LoopLbl),
+ hipe_rtl:mk_branch(ByteOffset, ltu, Limit,
+ hipe_rtl:label_name(LoopLbl),
hipe_rtl:label_name(DoneLbl)),
LoopLbl,
load_bytes(Tmp, Base, ByteOffset, {unsigned, big}, 1),
@@ -1074,7 +1073,7 @@ load_bytes(Dst, Base, Offset, {Signedness, Endianness}, X) when X > 1 ->
hipe_rtl:mk_alu(Offset, Offset, add, hipe_rtl:mk_imm(1)),
hipe_rtl:mk_alu(Dst, Dst, sll, hipe_rtl:mk_imm(8)),
hipe_rtl:mk_alu(Dst, Dst, 'or', Tmp1),
- hipe_rtl:mk_branch(Offset, lt, Limit, hipe_rtl:label_name(LoopLbl),
+ hipe_rtl:mk_branch(Offset, ltu, Limit, hipe_rtl:label_name(LoopLbl),
hipe_rtl:label_name(EndLbl)),
EndLbl];
little ->
@@ -1086,7 +1085,7 @@ load_bytes(Dst, Base, Offset, {Signedness, Endianness}, X) when X > 1 ->
hipe_rtl:mk_load(Tmp1, Base, TmpOffset, byte, Signedness),
hipe_rtl:mk_alu(Dst, Dst, sll, hipe_rtl:mk_imm(8)),
hipe_rtl:mk_alu(Dst, Dst, 'or', Tmp1),
- hipe_rtl:mk_branch(Offset, lt, TmpOffset, hipe_rtl:label_name(LoopLbl),
+ hipe_rtl:mk_branch(Offset, ltu, TmpOffset, hipe_rtl:label_name(LoopLbl),
hipe_rtl:label_name(EndLbl)),
EndLbl,
hipe_rtl:mk_move(Offset, Limit)]
diff --git a/lib/hipe/test/bs_SUITE_data/bs_construct.erl b/lib/hipe/test/bs_SUITE_data/bs_construct.erl
index 7251cdce43..b9e7d93570 100644
--- a/lib/hipe/test/bs_SUITE_data/bs_construct.erl
+++ b/lib/hipe/test/bs_SUITE_data/bs_construct.erl
@@ -18,6 +18,7 @@ test() ->
ok = bad_append(),
ok = system_limit(),
ok = bad_floats(),
+ ok = huge_binaries(),
ok.
%%--------------------------------------------------------------------
@@ -269,3 +270,36 @@ bad_floats() ->
{'EXIT',{badarg,_}} = (catch <<3.14:(id((1 bsl 28) bor 32))/float>>),
{'EXIT',{system_limit,_}} = (catch <<3.14:(id(1 bsl BitsPerWord))/float>>),
ok.
+
+%%--------------------------------------------------------------------
+%% A bug in the implementation of binaries compared sizes in bits with sizes in
+%% bytes, causing <<0:(id((1 bsl 31)-1))>> to fail to construct with
+%% 'system_limit'.
+%% <<0:(id((1 bsl 32)-1))>> was succeeding because the comparison was
+%% (incorrectly) signed.
+
+huge_binaries() ->
+ AlmostIllegal = id(<<0:(id((1 bsl 32)-8))>>),
+ case erlang:system_info(wordsize) of
+ 4 -> huge_binaries_32(AlmostIllegal);
+ 8 -> ok
+ end,
+ garbage_collect(),
+ id(<<0:(id((1 bsl 31)-1))>>),
+ id(<<0:(id((1 bsl 30)-1))>>),
+ garbage_collect(),
+ ok.
+
+huge_binaries_32(AlmostIllegal) ->
+ %% Attempt construction of too large binary using bs_init/1 (which takes the
+ %% number of bytes as an argument, which should be compared to the maximum
+ %% size in bytes).
+ {'EXIT',{system_limit,_}} = (catch <<0:32,AlmostIllegal/binary>>),
+ %% Attempt construction of too large binary using bs_init/1 with a size in
+ %% bytes that has the msb set (and would be negative if it was signed).
+ {'EXIT',{system_limit,_}} =
+ (catch <<0:8, AlmostIllegal/binary, AlmostIllegal/binary,
+ AlmostIllegal/binary, AlmostIllegal/binary,
+ AlmostIllegal/binary, AlmostIllegal/binary,
+ AlmostIllegal/binary, AlmostIllegal/binary>>),
+ ok.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 04:53:32 +0000