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spirv-reader: limit SpecId to 16 bits 

Fixed: tint:883
Change-Id: Ifcbc886421a67452834f3e3d7aae9a8883b435f8
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/54460
Auto-Submit: David Neto <dneto@google.com>
Commit-Queue: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
This commit is contained in:
David Neto 2021-06-11 21:24:46 +00:00 committed by Tint LUCI CQ
parent ba403cdf8f
commit 906c9cafbb
2 changed files with 36 additions and 1 deletions
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8
src/reader/spirv/parser_impl.cc
View File

@ -1166,7 +1166,13 @@ bool ParserImpl::EmitScalarSpecConstants() {
ast::DecorationList spec_id_decos;
for (const auto& deco : GetDecorationsFor(inst.result_id())) {
if ((deco.size() == 2) && (deco[0] == SpvDecorationSpecId)) {
auto* cid = create<ast::OverrideDecoration>(Source{}, deco[1]);
const uint32_t id = deco[1];
if (id > 65535) {
return Fail() << "SpecId too large. WGSL override IDs must be "
"between 0 and 65535: ID %"
<< inst.result_id() << " has SpecId " << id;
}
auto* cid = create<ast::OverrideDecoration>(Source{}, id);
spec_id_decos.push_back(cid);
break;
}

29
src/reader/spirv/parser_impl_module_var_test.cc
View File

@ -2069,6 +2069,35 @@ TEST_F(
})")) << module_str;
}
TEST_F(SpvModuleScopeVarParserTest, ScalarSpecConstant_DeclareConst_Id_TooBig) {
// Override IDs must be between 0 and 65535
auto p = parser(test::Assemble(Preamble() + FragMain() + R"(
OpDecorate %1 SpecId 65536
%bool = OpTypeBool
%1 = OpSpecConstantTrue %bool
%void = OpTypeVoid
%voidfn = OpTypeFunction %void
)" + MainBody()));
EXPECT_FALSE(p->Parse());
EXPECT_EQ(p->error(),
"SpecId too large. WGSL override IDs must be between 0 and 65535: "
"ID %1 has SpecId 65536");
}
TEST_F(SpvModuleScopeVarParserTest,
ScalarSpecConstant_DeclareConst_Id_MaxValid) {
// Override IDs must be between 0 and 65535
auto p = parser(test::Assemble(Preamble() + FragMain() + R"(
OpDecorate %1 SpecId 65535
%bool = OpTypeBool
%1 = OpSpecConstantTrue %bool
%void = OpTypeVoid
%voidfn = OpTypeFunction %void
)" + MainBody()));
EXPECT_TRUE(p->Parse());
EXPECT_EQ(p->error(), "");
}
TEST_F(SpvModuleScopeVarParserTest, ScalarSpecConstant_DeclareConst_True) {
auto p = parser(test::Assemble(Preamble() + FragMain() + R"(
OpName %c "myconst"