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v8/test/fuzzer/wasm-compile.cc
Matthias Liedtke 58e6088d62 [fuzzer][wasm] Use externref in structs, locals and signatures 
Change-Id: I57c805b899a25e58035f2ed9accd10e43114fd80
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3802689
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Auto-Submit: Matthias Liedtke <mliedtke@chromium.org>
Commit-Queue: Matthias Liedtke <mliedtke@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82112}
2022-08-01 15:48:02 +00:00

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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <algorithm>
#include "src/base/macros.h"
#include "src/base/v8-fallthrough.h"
#include "src/execution/isolate.h"
#include "src/wasm/function-body-decoder.h"
#include "src/wasm/wasm-module-builder.h"
#include "src/wasm/wasm-module.h"
#include "src/wasm/wasm-opcodes-inl.h"
#include "test/common/wasm/flag-utils.h"
#include "test/common/wasm/test-signatures.h"
#include "test/fuzzer/wasm-fuzzer-common.h"
namespace v8 {
namespace internal {
namespace wasm {
namespace fuzzer {
namespace {
constexpr int kMaxArrays = 4;
constexpr int kMaxStructs = 4;
constexpr int kMaxStructFields = 4;
constexpr int kMaxFunctions = 4;
constexpr int kMaxGlobals = 64;
constexpr int kMaxParameters = 15;
constexpr int kMaxReturns = 15;
constexpr int kMaxExceptions = 4;
constexpr int kMaxTableSize = 32;
constexpr int kMaxTables = 4;
constexpr int kMaxArraySize = 20;
class DataRange {
base::Vector<const uint8_t> data_;
public:
explicit DataRange(base::Vector<const uint8_t> data) : data_(data) {}
DataRange(const DataRange&) = delete;
DataRange& operator=(const DataRange&) = delete;
// Don't accidentally pass DataRange by value. This will reuse bytes and might
// lead to OOM because the end might not be reached.
// Define move constructor and move assignment, disallow copy constructor and
// copy assignment (below).
DataRange(DataRange&& other) V8_NOEXCEPT : DataRange(other.data_) {
other.data_ = {};
}
DataRange& operator=(DataRange&& other) V8_NOEXCEPT {
data_ = other.data_;
other.data_ = {};
return *this;
}
size_t size() const { return data_.size(); }
DataRange split() {
uint16_t num_bytes = get<uint16_t>() % std::max(size_t{1}, data_.size());
DataRange split(data_.SubVector(0, num_bytes));
data_ += num_bytes;
return split;
}
template <typename T, size_t max_bytes = sizeof(T)>
T get() {
// Bool needs special handling (see template specialization below).
static_assert(!std::is_same<T, bool>::value, "bool needs special handling");
static_assert(max_bytes <= sizeof(T));
// We want to support the case where we have less than sizeof(T) bytes
// remaining in the slice. For example, if we emit an i32 constant, it's
// okay if we don't have a full four bytes available, we'll just use what
// we have. We aren't concerned about endianness because we are generating
// arbitrary expressions.
const size_t num_bytes = std::min(max_bytes, data_.size());
T result = T();
memcpy(&result, data_.begin(), num_bytes);
data_ += num_bytes;
return result;
}
};
// Explicit specialization must be defined outside of class body.
template <>
bool DataRange::get() {
// The general implementation above is not instantiable for bool, as that
// would cause undefinied behaviour when memcpy'ing random bytes to the
// bool. This can result in different observable side effects when invoking
// get<bool> between debug and release version, which eventually makes the
// code output different as well as raising various unrecoverable errors on
// runtime.
// Hence we specialize get<bool> to consume a full byte and use the least
// significant bit only (0 == false, 1 == true).
return get<uint8_t>() % 2;
}
enum NonNullables { kAllowNonNullables, kDisallowNonNullables };
enum PackedTypes { kIncludePackedTypes, kExcludePackedTypes };
enum Generics { kIncludeGenerics, kExcludeGenerics };
ValueType GetValueTypeHelper(DataRange* data, bool liftoff_as_reference,
uint32_t num_nullable_types,
uint32_t num_non_nullable_types,
NonNullables allow_non_nullable,
PackedTypes include_packed_types,
Generics include_generics) {
// Non wasm-gc types.
std::vector<ValueType> types{kWasmI32, kWasmI64, kWasmF32, kWasmF64,
kWasmS128};
if (!liftoff_as_reference) {
return types[data->get<uint8_t>() % types.size()];
}
// If {liftoff_as_reference}, include wasm-gc types.
if (include_packed_types == kIncludePackedTypes) {
types.insert(types.end(), {kWasmI8, kWasmI16});
}
// Decide if the return type will be nullable or not.
const bool nullable =
(allow_non_nullable == kAllowNonNullables) ? data->get<bool>() : true;
if (nullable) {
types.insert(types.end(), {kWasmI31Ref, kWasmFuncRef, kWasmExternRef});
}
if (include_generics == kIncludeGenerics) {
types.insert(types.end(), {kWasmDataRef, kWasmAnyRef, kWasmEqRef});
}
// The last index of user-defined types allowed is different based on the
// nullability of the output.
const uint32_t num_user_defined_types =
nullable ? num_nullable_types : num_non_nullable_types;
// Conceptually, user-defined types are added to the end of the list. Pick a
// random one among them.
uint32_t id = data->get<uint8_t>() % (types.size() + num_user_defined_types);
Nullability nullability = nullable ? kNullable : kNonNullable;
if (id >= types.size()) {
// Return user-defined type.
return ValueType::RefMaybeNull(id - static_cast<uint32_t>(types.size()),
nullability);
}
// If returning a reference type, fix its nullability according to {nullable}.
if (types[id].is_reference()) {
return ValueType::RefMaybeNull(types[id].heap_type(), nullability);
}
// Otherwise, just return the picked type.
return types[id];
}
ValueType GetValueType(DataRange* data, bool liftoff_as_reference,
uint32_t num_types) {
return GetValueTypeHelper(data, liftoff_as_reference, num_types, num_types,
kAllowNonNullables, kExcludePackedTypes,
kIncludeGenerics);
}
class WasmGenerator {
template <WasmOpcode Op, ValueKind... Args>
void op(DataRange* data) {
Generate<Args...>(data);
builder_->Emit(Op);
}
class V8_NODISCARD BlockScope {
public:
BlockScope(WasmGenerator* gen, WasmOpcode block_type,
base::Vector<const ValueType> param_types,
base::Vector<const ValueType> result_types,
base::Vector<const ValueType> br_types, bool emit_end = true)
: gen_(gen), emit_end_(emit_end) {
gen->blocks_.emplace_back(br_types.begin(), br_types.end());
gen->builder_->EmitByte(block_type);
if (param_types.size() == 0 && result_types.size() == 0) {
gen->builder_->EmitValueType(kWasmVoid);
return;
}
if (param_types.size() == 0 && result_types.size() == 1) {
gen->builder_->EmitValueType(result_types[0]);
return;
}
// Multi-value block.
Zone* zone = gen->builder_->builder()->zone();
FunctionSig::Builder builder(zone, result_types.size(),
param_types.size());
for (auto& type : param_types) {
DCHECK_NE(type, kWasmVoid);
builder.AddParam(type);
}
for (auto& type : result_types) {
DCHECK_NE(type, kWasmVoid);
builder.AddReturn(type);
}
FunctionSig* sig = builder.Build();
int sig_id = gen->builder_->builder()->AddSignature(sig);
gen->builder_->EmitI32V(sig_id);
}
~BlockScope() {
if (emit_end_) gen_->builder_->Emit(kExprEnd);
gen_->blocks_.pop_back();
}
private:
WasmGenerator* const gen_;
bool emit_end_;
};
void block(base::Vector<const ValueType> param_types,
base::Vector<const ValueType> return_types, DataRange* data) {
BlockScope block_scope(this, kExprBlock, param_types, return_types,
return_types);
ConsumeAndGenerate(param_types, return_types, data);
}
template <ValueKind T>
void block(DataRange* data) {
block({}, base::VectorOf({ValueType::Primitive(T)}), data);
}
void loop(base::Vector<const ValueType> param_types,
base::Vector<const ValueType> return_types, DataRange* data) {
BlockScope block_scope(this, kExprLoop, param_types, return_types,
param_types);
ConsumeAndGenerate(param_types, return_types, data);
}
template <ValueKind T>
void loop(DataRange* data) {
loop({}, base::VectorOf({ValueType::Primitive(T)}), data);
}
enum IfType { kIf, kIfElse };
void if_(base::Vector<const ValueType> param_types,
base::Vector<const ValueType> return_types, IfType type,
DataRange* data) {
// One-armed "if" are only valid if the input and output types are the same.
DCHECK_IMPLIES(type == kIf, param_types == return_types);
Generate(kWasmI32, data);
BlockScope block_scope(this, kExprIf, param_types, return_types,
return_types);
ConsumeAndGenerate(param_types, return_types, data);
if (type == kIfElse) {
builder_->Emit(kExprElse);
ConsumeAndGenerate(param_types, return_types, data);
}
}
template <ValueKind T, IfType type>
void if_(DataRange* data) {
static_assert(T == kVoid || type == kIfElse,
"if without else cannot produce a value");
if_({},
T == kVoid ? base::Vector<ValueType>{}
: base::VectorOf({ValueType::Primitive(T)}),
type, data);
}
void try_block_helper(ValueType return_type, DataRange* data) {
bool has_catch_all = data->get<bool>();
uint8_t num_catch =
data->get<uint8_t>() % (builder_->builder()->NumExceptions() + 1);
bool is_delegate = num_catch == 0 && !has_catch_all && data->get<bool>();
// Allow one more target than there are enclosing try blocks, for delegating
// to the caller.
base::Vector<const ValueType> return_type_vec =
return_type.kind() == kVoid ? base::Vector<ValueType>{}
: base::VectorOf(&return_type, 1);
BlockScope block_scope(this, kExprTry, {}, return_type_vec, return_type_vec,
!is_delegate);
int control_depth = static_cast<int>(blocks_.size()) - 1;
Generate(return_type, data);
catch_blocks_.push_back(control_depth);
for (int i = 0; i < num_catch; ++i) {
const FunctionSig* exception_type =
builder_->builder()->GetExceptionType(i);
auto exception_type_vec =
base::VectorOf(exception_type->parameters().begin(),
exception_type->parameter_count());
builder_->EmitWithU32V(kExprCatch, i);
ConsumeAndGenerate(exception_type_vec, return_type_vec, data);
}
if (has_catch_all) {
builder_->Emit(kExprCatchAll);
Generate(return_type, data);
}
if (is_delegate) {
// The delegate target depth does not include the current try block,
// because 'delegate' closes this scope. However it is still in the
// {blocks_} list, so remove one to get the correct size.
int delegate_depth = data->get<uint8_t>() % (blocks_.size() - 1);
builder_->EmitWithU32V(kExprDelegate, delegate_depth);
}
catch_blocks_.pop_back();
}
template <ValueKind T>
void try_block(DataRange* data) {
try_block_helper(ValueType::Primitive(T), data);
}
void any_block(base::Vector<const ValueType> param_types,
base::Vector<const ValueType> return_types, DataRange* data) {
uint8_t block_type = data->get<uint8_t>() % 4;
switch (block_type) {
case 0:
block(param_types, return_types, data);
return;
case 1:
loop(param_types, return_types, data);
return;
case 2:
if (param_types == return_types) {
if_({}, {}, kIf, data);
return;
}
V8_FALLTHROUGH;
case 3:
if_(param_types, return_types, kIfElse, data);
return;
}
}
void br(DataRange* data) {
// There is always at least the block representing the function body.
DCHECK(!blocks_.empty());
const uint32_t target_block = data->get<uint32_t>() % blocks_.size();
const auto break_types = blocks_[target_block];
Generate(base::VectorOf(break_types), data);
builder_->EmitWithI32V(
kExprBr, static_cast<uint32_t>(blocks_.size()) - 1 - target_block);
}
template <ValueKind wanted_kind>
void br_if(DataRange* data) {
// There is always at least the block representing the function body.
DCHECK(!blocks_.empty());
const uint32_t target_block = data->get<uint32_t>() % blocks_.size();
const auto break_types = base::VectorOf(blocks_[target_block]);
Generate(break_types, data);
Generate(kWasmI32, data);
builder_->EmitWithI32V(
kExprBrIf, static_cast<uint32_t>(blocks_.size()) - 1 - target_block);
ConsumeAndGenerate(
break_types,
wanted_kind == kVoid
? base::Vector<ValueType>{}
: base::VectorOf({ValueType::Primitive(wanted_kind)}),
data);
}
template <ValueKind wanted_kind>
void br_on_null(DataRange* data) {
DCHECK(!blocks_.empty());
const uint32_t target_block = data->get<uint32_t>() % blocks_.size();
const auto break_types = base::VectorOf(blocks_[target_block]);
if (!liftoff_as_reference_) {
Generate<wanted_kind>(data);
return;
}
Generate(break_types, data);
GenerateRef(HeapType(HeapType::kAny), data);
builder_->EmitWithI32V(
kExprBrOnNull,
static_cast<uint32_t>(blocks_.size()) - 1 - target_block);
builder_->Emit(kExprDrop);
ConsumeAndGenerate(
break_types,
wanted_kind == kVoid
? base::Vector<ValueType>{}
: base::VectorOf({ValueType::Primitive(wanted_kind)}),
data);
}
// TODO(eholk): make this function constexpr once gcc supports it
static uint8_t max_alignment(WasmOpcode memop) {
switch (memop) {
case kExprS128LoadMem:
case kExprS128StoreMem:
return 4;
case kExprI64LoadMem:
case kExprF64LoadMem:
case kExprI64StoreMem:
case kExprF64StoreMem:
case kExprI64AtomicStore:
case kExprI64AtomicLoad:
case kExprI64AtomicAdd:
case kExprI64AtomicSub:
case kExprI64AtomicAnd:
case kExprI64AtomicOr:
case kExprI64AtomicXor:
case kExprI64AtomicExchange:
case kExprI64AtomicCompareExchange:
case kExprS128Load8x8S:
case kExprS128Load8x8U:
case kExprS128Load16x4S:
case kExprS128Load16x4U:
case kExprS128Load32x2S:
case kExprS128Load32x2U:
case kExprS128Load64Splat:
case kExprS128Load64Zero:
return 3;
case kExprI32LoadMem:
case kExprI64LoadMem32S:
case kExprI64LoadMem32U:
case kExprF32LoadMem:
case kExprI32StoreMem:
case kExprI64StoreMem32:
case kExprF32StoreMem:
case kExprI32AtomicStore:
case kExprI64AtomicStore32U:
case kExprI32AtomicLoad:
case kExprI64AtomicLoad32U:
case kExprI32AtomicAdd:
case kExprI32AtomicSub:
case kExprI32AtomicAnd:
case kExprI32AtomicOr:
case kExprI32AtomicXor:
case kExprI32AtomicExchange:
case kExprI32AtomicCompareExchange:
case kExprI64AtomicAdd32U:
case kExprI64AtomicSub32U:
case kExprI64AtomicAnd32U:
case kExprI64AtomicOr32U:
case kExprI64AtomicXor32U:
case kExprI64AtomicExchange32U:
case kExprI64AtomicCompareExchange32U:
case kExprS128Load32Splat:
case kExprS128Load32Zero:
return 2;
case kExprI32LoadMem16S:
case kExprI32LoadMem16U:
case kExprI64LoadMem16S:
case kExprI64LoadMem16U:
case kExprI32StoreMem16:
case kExprI64StoreMem16:
case kExprI32AtomicStore16U:
case kExprI64AtomicStore16U:
case kExprI32AtomicLoad16U:
case kExprI64AtomicLoad16U:
case kExprI32AtomicAdd16U:
case kExprI32AtomicSub16U:
case kExprI32AtomicAnd16U:
case kExprI32AtomicOr16U:
case kExprI32AtomicXor16U:
case kExprI32AtomicExchange16U:
case kExprI32AtomicCompareExchange16U:
case kExprI64AtomicAdd16U:
case kExprI64AtomicSub16U:
case kExprI64AtomicAnd16U:
case kExprI64AtomicOr16U:
case kExprI64AtomicXor16U:
case kExprI64AtomicExchange16U:
case kExprI64AtomicCompareExchange16U:
case kExprS128Load16Splat:
return 1;
case kExprI32LoadMem8S:
case kExprI32LoadMem8U:
case kExprI64LoadMem8S:
case kExprI64LoadMem8U:
case kExprI32StoreMem8:
case kExprI64StoreMem8:
case kExprI32AtomicStore8U:
case kExprI64AtomicStore8U:
case kExprI32AtomicLoad8U:
case kExprI64AtomicLoad8U:
case kExprI32AtomicAdd8U:
case kExprI32AtomicSub8U:
case kExprI32AtomicAnd8U:
case kExprI32AtomicOr8U:
case kExprI32AtomicXor8U:
case kExprI32AtomicExchange8U:
case kExprI32AtomicCompareExchange8U:
case kExprI64AtomicAdd8U:
case kExprI64AtomicSub8U:
case kExprI64AtomicAnd8U:
case kExprI64AtomicOr8U:
case kExprI64AtomicXor8U:
case kExprI64AtomicExchange8U:
case kExprI64AtomicCompareExchange8U:
case kExprS128Load8Splat:
return 0;
default:
return 0;
}
}
template <WasmOpcode memory_op, ValueKind... arg_kinds>
void memop(DataRange* data) {
const uint8_t align = data->get<uint8_t>() % (max_alignment(memory_op) + 1);
const uint32_t offset = data->get<uint32_t>();
// Generate the index and the arguments, if any.
Generate<kI32, arg_kinds...>(data);
if (WasmOpcodes::IsPrefixOpcode(static_cast<WasmOpcode>(memory_op >> 8))) {
DCHECK(memory_op >> 8 == kAtomicPrefix || memory_op >> 8 == kSimdPrefix);
builder_->EmitWithPrefix(memory_op);
} else {
builder_->Emit(memory_op);
}
builder_->EmitU32V(align);
builder_->EmitU32V(offset);
}
template <WasmOpcode Op, ValueKind... Args>
void atomic_op(DataRange* data) {
const uint8_t align = data->get<uint8_t>() % (max_alignment(Op) + 1);
const uint32_t offset = data->get<uint32_t>();
Generate<Args...>(data);
builder_->EmitWithPrefix(Op);
builder_->EmitU32V(align);
builder_->EmitU32V(offset);
}
template <WasmOpcode Op, ValueKind... Args>
void op_with_prefix(DataRange* data) {
Generate<Args...>(data);
builder_->EmitWithPrefix(Op);
}
void simd_const(DataRange* data) {
builder_->EmitWithPrefix(kExprS128Const);
for (int i = 0; i < kSimd128Size; i++) {
builder_->EmitByte(data->get<byte>());
}
}
template <WasmOpcode Op, int lanes, ValueKind... Args>
void simd_lane_op(DataRange* data) {
Generate<Args...>(data);
builder_->EmitWithPrefix(Op);
builder_->EmitByte(data->get<byte>() % lanes);
}
template <WasmOpcode Op, int lanes, ValueKind... Args>
void simd_lane_memop(DataRange* data) {
// Simd load/store instructions that have a lane immediate.
memop<Op, Args...>(data);
builder_->EmitByte(data->get<byte>() % lanes);
}
void simd_shuffle(DataRange* data) {
Generate<kS128, kS128>(data);
builder_->EmitWithPrefix(kExprI8x16Shuffle);
for (int i = 0; i < kSimd128Size; i++) {
builder_->EmitByte(static_cast<uint8_t>(data->get<byte>() % 32));
}
}
void drop(DataRange* data) {
Generate(GetValueType(data, liftoff_as_reference_,
static_cast<uint32_t>(functions_.size()) +
num_structs_ + num_arrays_),
data);
builder_->Emit(kExprDrop);
}
enum CallKind { kCallDirect, kCallIndirect, kCallRef };
template <ValueKind wanted_kind>
void call(DataRange* data) {
call(data, ValueType::Primitive(wanted_kind), kCallDirect);
}
template <ValueKind wanted_kind>
void call_indirect(DataRange* data) {
call(data, ValueType::Primitive(wanted_kind), kCallIndirect);
}
template <ValueKind wanted_kind>
void call_ref(DataRange* data) {
if (liftoff_as_reference_) {
call(data, ValueType::Primitive(wanted_kind), kCallRef);
} else {
Generate<wanted_kind>(data);
}
}
void Convert(ValueType src, ValueType dst) {
auto idx = [](ValueType t) -> int {
switch (t.kind()) {
case kI32:
return 0;
case kI64:
return 1;
case kF32:
return 2;
case kF64:
return 3;
default:
UNREACHABLE();
}
};
static constexpr WasmOpcode kConvertOpcodes[] = {
// {i32, i64, f32, f64} -> i32
kExprNop, kExprI32ConvertI64, kExprI32SConvertF32, kExprI32SConvertF64,
// {i32, i64, f32, f64} -> i64
kExprI64SConvertI32, kExprNop, kExprI64SConvertF32, kExprI64SConvertF64,
// {i32, i64, f32, f64} -> f32
kExprF32SConvertI32, kExprF32SConvertI64, kExprNop, kExprF32ConvertF64,
// {i32, i64, f32, f64} -> f64
kExprF64SConvertI32, kExprF64SConvertI64, kExprF64ConvertF32, kExprNop};
int arr_idx = idx(dst) << 2 | idx(src);
builder_->Emit(kConvertOpcodes[arr_idx]);
}
void call(DataRange* data, ValueType wanted_kind, CallKind call_kind) {
uint8_t random_byte = data->get<uint8_t>();
int func_index = random_byte % functions_.size();
uint32_t sig_index = functions_[func_index];
const FunctionSig* sig = builder_->builder()->GetSignature(sig_index);
// Generate arguments.
for (size_t i = 0; i < sig->parameter_count(); ++i) {
Generate(sig->GetParam(i), data);
}
// Emit call.
// If the return types of the callee happen to match the return types of the
// caller, generate a tail call.
// TODO(thibaudm): Re-enable when crbug.com/1269989 is fixed.
bool use_return_call = false;
if (use_return_call &&
std::equal(sig->returns().begin(), sig->returns().end(),
builder_->signature()->returns().begin(),
builder_->signature()->returns().end())) {
if (call_kind == kCallDirect) {
builder_->EmitWithU32V(kExprReturnCall, func_index);
} else if (call_kind == kCallIndirect) {
// This will not trap because table[func_index] always contains function
// func_index.
builder_->EmitI32Const(func_index);
builder_->EmitWithU32V(kExprReturnCallIndirect, sig_index);
// TODO(11954): Use other table indices too.
builder_->EmitByte(0); // Table index.
} else {
GenerateRef(HeapType(sig_index), data);
builder_->Emit(kExprReturnCallRef);
}
return;
} else {
if (call_kind == kCallDirect) {
builder_->EmitWithU32V(kExprCallFunction, func_index);
} else if (call_kind == kCallIndirect) {
// This will not trap because table[func_index] always contains function
// func_index.
builder_->EmitI32Const(func_index);
builder_->EmitWithU32V(kExprCallIndirect, sig_index);
// TODO(11954): Use other table indices too.
builder_->EmitByte(0); // Table index.
} else {
GenerateRef(HeapType(sig_index), data);
builder_->Emit(kExprCallRef);
}
}
if (sig->return_count() == 0 && wanted_kind != kWasmVoid) {
// The call did not generate a value. Thus just generate it here.
Generate(wanted_kind, data);
return;
}
if (wanted_kind == kWasmVoid) {
// The call did generate values, but we did not want one.
for (size_t i = 0; i < sig->return_count(); ++i) {
builder_->Emit(kExprDrop);
}
return;
}
auto return_types =
base::VectorOf(sig->returns().begin(), sig->return_count());
auto wanted_types =
base::VectorOf(&wanted_kind, wanted_kind == kWasmVoid ? 0 : 1);
ConsumeAndGenerate(return_types, wanted_types, data);
}
struct Var {
uint32_t index;
ValueType type = kWasmVoid;
Var() = default;
Var(uint32_t index, ValueType type) : index(index), type(type) {}
bool is_valid() const { return type != kWasmVoid; }
};
Var GetRandomLocal(DataRange* data) {
uint32_t num_params =
static_cast<uint32_t>(builder_->signature()->parameter_count());
uint32_t num_locals = static_cast<uint32_t>(locals_.size());
if (num_params + num_locals == 0) return {};
uint32_t index = data->get<uint8_t>() % (num_params + num_locals);
ValueType type = index < num_params ? builder_->signature()->GetParam(index)
: locals_[index - num_params];
return {index, type};
}
constexpr static bool is_convertible_kind(ValueKind kind) {
return kind == kI32 || kind == kI64 || kind == kF32 || kind == kF64;
}
template <ValueKind wanted_kind>
void local_op(DataRange* data, WasmOpcode opcode) {
static_assert(wanted_kind == kVoid || is_convertible_kind(wanted_kind));
Var local = GetRandomLocal(data);
// If there are no locals and no parameters, just generate any value (if a
// value is needed), or do nothing.
if (!local.is_valid() || !is_convertible_kind(local.type.kind())) {
if (wanted_kind == kVoid) return;
return Generate<wanted_kind>(data);
}
if (opcode != kExprLocalGet) Generate(local.type, data);
builder_->EmitWithU32V(opcode, local.index);
if (wanted_kind != kVoid && local.type.kind() != wanted_kind) {
Convert(local.type, ValueType::Primitive(wanted_kind));
}
}
template <ValueKind wanted_kind>
void get_local(DataRange* data) {
static_assert(wanted_kind != kVoid, "illegal type");
local_op<wanted_kind>(data, kExprLocalGet);
}
void set_local(DataRange* data) { local_op<kVoid>(data, kExprLocalSet); }
template <ValueKind wanted_kind>
void tee_local(DataRange* data) {
local_op<wanted_kind>(data, kExprLocalTee);
}
template <size_t num_bytes>
void i32_const(DataRange* data) {
builder_->EmitI32Const(data->get<int32_t, num_bytes>());
}
template <size_t num_bytes>
void i64_const(DataRange* data) {
builder_->EmitI64Const(data->get<int64_t, num_bytes>());
}
Var GetRandomGlobal(DataRange* data, bool ensure_mutable) {
uint32_t index;
if (ensure_mutable) {
if (mutable_globals_.empty()) return {};
index = mutable_globals_[data->get<uint8_t>() % mutable_globals_.size()];
} else {
if (globals_.empty()) return {};
index = data->get<uint8_t>() % globals_.size();
}
ValueType type = globals_[index];
return {index, type};
}
template <ValueKind wanted_kind>
void global_op(DataRange* data) {
static_assert(wanted_kind == kVoid || is_convertible_kind(wanted_kind));
constexpr bool is_set = wanted_kind == kVoid;
Var global = GetRandomGlobal(data, is_set);
// If there are no globals, just generate any value (if a value is needed),
// or do nothing.
if (!global.is_valid() || !is_convertible_kind(global.type.kind())) {
if (wanted_kind == kVoid) return;
return Generate<wanted_kind>(data);
}
if (is_set) Generate(global.type, data);
builder_->EmitWithU32V(is_set ? kExprGlobalSet : kExprGlobalGet,
global.index);
if (!is_set && global.type.kind() != wanted_kind) {
Convert(global.type, ValueType::Primitive(wanted_kind));
}
}
template <ValueKind wanted_kind>
void get_global(DataRange* data) {
static_assert(wanted_kind != kVoid, "illegal type");
global_op<wanted_kind>(data);
}
template <ValueKind select_kind>
void select_with_type(DataRange* data) {
static_assert(select_kind != kVoid, "illegal kind for select");
Generate<select_kind, select_kind, kI32>(data);
// num_types is always 1.
uint8_t num_types = 1;
builder_->EmitWithU8U8(kExprSelectWithType, num_types,
ValueType::Primitive(select_kind).value_type_code());
}
void set_global(DataRange* data) { global_op<kVoid>(data); }
void throw_or_rethrow(DataRange* data) {
bool rethrow = data->get<bool>();
if (rethrow && !catch_blocks_.empty()) {
int control_depth = static_cast<int>(blocks_.size() - 1);
int catch_index =
data->get<uint8_t>() % static_cast<int>(catch_blocks_.size());
builder_->EmitWithU32V(kExprRethrow,
control_depth - catch_blocks_[catch_index]);
} else {
int tag = data->get<uint8_t>() % builder_->builder()->NumExceptions();
const FunctionSig* exception_sig =
builder_->builder()->GetExceptionType(tag);
base::Vector<const ValueType> exception_types(
exception_sig->parameters().begin(),
exception_sig->parameter_count());
Generate(exception_types, data);
builder_->EmitWithU32V(kExprThrow, tag);
}
}
template <ValueKind... Types>
void sequence(DataRange* data) {
Generate<Types...>(data);
}
void current_memory(DataRange* data) {
builder_->EmitWithU8(kExprMemorySize, 0);
}
void grow_memory(DataRange* data);
void ref_null(HeapType type, DataRange* data) {
builder_->EmitWithI32V(kExprRefNull, type.code());
}
bool get_local_ref(HeapType type, DataRange* data, Nullability nullable) {
Var local = GetRandomLocal(data);
// TODO(manoskouk): Ideally we would check for subtyping here over type
// equality, but we don't have a module.
// TODO(7748): Remove this condition if non-nullable locals are allowed.
if (nullable == kNullable && local.is_valid() &&
local.type.is_object_reference() && type == local.type.heap_type()) {
builder_->EmitWithU32V(kExprLocalGet, local.index);
return true;
}
return false;
}
bool new_object(HeapType type, DataRange* data, Nullability nullable) {
DCHECK(liftoff_as_reference_ && type.is_index());
uint32_t index = type.ref_index();
bool new_default = data->get<bool>();
if (builder_->builder()->IsStructType(index)) {
const StructType* struct_gen = builder_->builder()->GetStructType(index);
int field_count = struct_gen->field_count();
bool can_be_defaultable = std::all_of(
struct_gen->fields().begin(), struct_gen->fields().end(),
[](ValueType type) -> bool { return type.is_defaultable(); });
bool is_mutable = std::all_of(
struct_gen->mutabilities().begin(), struct_gen->mutabilities().end(),
[](bool mutability) -> bool { return mutability; });
if (new_default && can_be_defaultable && is_mutable) {
builder_->EmitWithPrefix(kExprStructNewDefault);
builder_->EmitU32V(index);
} else {
for (int i = 0; i < field_count; i++) {
Generate(struct_gen->field(i).Unpacked(), data);
}
builder_->EmitWithPrefix(kExprStructNew);
builder_->EmitU32V(index);
}
} else if (builder_->builder()->IsArrayType(index)) {
bool can_be_defaultable = builder_->builder()
->GetArrayType(index)
->element_type()
.is_defaultable();
if (new_default && can_be_defaultable) {
Generate(kWasmI32, data);
builder_->EmitI32Const(kMaxArraySize);
builder_->Emit(kExprI32RemS);
builder_->EmitWithPrefix(kExprArrayNewDefault);
builder_->EmitU32V(index);
} else {
Generate(
builder_->builder()->GetArrayType(index)->element_type().Unpacked(),
data);
Generate(kWasmI32, data);
builder_->EmitI32Const(kMaxArraySize);
builder_->Emit(kExprI32RemS);
builder_->EmitWithPrefix(kExprArrayNew);
builder_->EmitU32V(index);
}
} else {
// Map the type index to a function index.
// TODO(11954. 7748): Once we have type canonicalization, choose a random
// function from among those matching the signature (consider function
// subtyping?).
uint32_t func_index = index - (num_arrays_ + num_structs_);
DCHECK_EQ(builder_->builder()->GetSignature(index),
builder_->builder()->GetFunction(func_index)->signature());
builder_->EmitWithU32V(kExprRefFunc, func_index);
}
return true;
}
template <ValueKind wanted_kind>
void table_op(std::vector<ValueType> types, DataRange* data,
WasmOpcode opcode) {
DCHECK(opcode == kExprTableSet || opcode == kExprTableSize ||
opcode == kExprTableGrow || opcode == kExprTableFill);
int num_tables = builder_->builder()->NumTables();
DCHECK_GT(num_tables, 0);
int index = data->get<uint8_t>() % num_tables;
for (size_t i = 0; i < types.size(); i++) {
// When passing the reftype by default kWasmFuncRef is used.
// Then the type is changed according to its table type.
if (types[i] == kWasmFuncRef) {
types[i] = builder_->builder()->GetTableType(index);
}
}
Generate(base::VectorOf(types), data);
if (opcode == kExprTableSet) {
builder_->Emit(opcode);
} else {
builder_->EmitWithPrefix(opcode);
}
builder_->EmitU32V(index);
}
bool table_get(HeapType type, DataRange* data, Nullability nullable) {
ValueType needed_type = ValueType::RefMaybeNull(type, nullable);
int table_count = builder_->builder()->NumTables();
ZoneVector<uint32_t> table(builder_->builder()->zone());
for (int i = 0; i < table_count; i++) {
if (builder_->builder()->GetTableType(i) == needed_type) {
table.push_back(i);
}
}
if (table.empty()) {
return false;
}
int index = data->get<uint8_t>() % static_cast<int>(table.size());
Generate(kWasmI32, data);
builder_->Emit(kExprTableGet);
builder_->EmitU32V(table[index]);
return true;
}
void table_set(DataRange* data) {
table_op<kVoid>({kWasmI32, kWasmFuncRef}, data, kExprTableSet);
}
void table_size(DataRange* data) { table_op<kI32>({}, data, kExprTableSize); }
void table_grow(DataRange* data) {
table_op<kI32>({kWasmFuncRef, kWasmI32}, data, kExprTableGrow);
}
void table_fill(DataRange* data) {
table_op<kVoid>({kWasmI32, kWasmFuncRef, kWasmI32}, data, kExprTableFill);
}
void table_copy(DataRange* data) {
ValueType needed_type = data->get<bool>() ? kWasmFuncRef : kWasmExternRef;
int table_count = builder_->builder()->NumTables();
ZoneVector<uint32_t> table(builder_->builder()->zone());
for (int i = 0; i < table_count; i++) {
if (builder_->builder()->GetTableType(i) == needed_type) {
table.push_back(i);
}
}
if (table.empty()) {
return;
}
int first_index = data->get<uint8_t>() % static_cast<int>(table.size());
int second_index = data->get<uint8_t>() % static_cast<int>(table.size());
Generate(kWasmI32, data);
Generate(kWasmI32, data);
Generate(kWasmI32, data);
builder_->EmitWithPrefix(kExprTableCopy);
builder_->EmitU32V(table[first_index]);
builder_->EmitU32V(table[second_index]);
}
bool array_get_helper(ValueType value_type, DataRange* data) {
WasmModuleBuilder* builder = builder_->builder();
ZoneVector<uint32_t> array_indices(builder->zone());
for (uint32_t i = num_structs_; i < num_arrays_ + num_structs_; i++) {
DCHECK(builder->IsArrayType(i));
if (builder->GetArrayType(i)->element_type().Unpacked() == value_type) {
array_indices.push_back(i);
}
}
if (!array_indices.empty()) {
int index = data->get<uint8_t>() % static_cast<int>(array_indices.size());
GenerateRef(HeapType(array_indices[index]), data, kNullable);
Generate(kWasmI32, data);
if (builder->GetArrayType(array_indices[index])
->element_type()
.is_packed()) {
builder_->EmitWithPrefix(data->get<bool>() ? kExprArrayGetS
: kExprArrayGetU);
} else {
builder_->EmitWithPrefix(kExprArrayGet);
}
builder_->EmitU32V(array_indices[index]);
return true;
}
return false;
}
template <ValueKind wanted_kind>
void array_get(DataRange* data) {
bool got_array_value =
array_get_helper(ValueType::Primitive(wanted_kind), data);
if (!got_array_value) {
Generate<wanted_kind>(data);
}
}
bool array_get_ref(HeapType type, DataRange* data, Nullability nullable) {
ValueType needed_type = ValueType::RefMaybeNull(type, nullable);
return array_get_helper(needed_type, data);
}
void i31_get(DataRange* data) {
if (!liftoff_as_reference_) {
Generate(kWasmI32, data);
return;
}
GenerateRef(HeapType(HeapType::kI31), data);
builder_->Emit(kExprRefAsNonNull);
if (data->get<bool>()) {
builder_->EmitWithPrefix(kExprI31GetS);
} else {
builder_->EmitWithPrefix(kExprI31GetU);
}
}
void array_len(DataRange* data) {
if (num_arrays_ > 1) {
int array_index = (data->get<uint8_t>() % num_arrays_) + num_structs_;
DCHECK(builder_->builder()->IsArrayType(array_index));
GenerateRef(HeapType(array_index), data);
builder_->EmitWithPrefix(kExprArrayLen);
builder_->EmitU32V(array_index);
} else {
Generate(kWasmI32, data);
}
}
void array_set(DataRange* data) {
WasmModuleBuilder* builder = builder_->builder();
ZoneVector<uint32_t> array_indices(builder->zone());
for (uint32_t i = num_structs_; i < num_arrays_ + num_structs_; i++) {
DCHECK(builder->IsArrayType(i));
if (builder->GetArrayType(i)->mutability()) {
array_indices.push_back(i);
}
}
if (array_indices.empty()) {
return;
}
int index = data->get<uint8_t>() % static_cast<int>(array_indices.size());
GenerateRef(HeapType(array_indices[index]), data);
Generate(kWasmI32, data);
Generate(
builder->GetArrayType(array_indices[index])->element_type().Unpacked(),
data);
builder_->EmitWithPrefix(kExprArraySet);
builder_->EmitU32V(array_indices[index]);
}
bool struct_get_helper(ValueType value_type, DataRange* data) {
WasmModuleBuilder* builder = builder_->builder();
ZoneVector<uint32_t> field_index(builder->zone());
ZoneVector<uint32_t> struct_index(builder->zone());
for (uint32_t i = 0; i < num_structs_; i++) {
DCHECK(builder->IsStructType(i));
int field_count = builder->GetStructType(i)->field_count();
for (int index = 0; index < field_count; index++) {
if (builder->GetStructType(i)->field(index) == value_type) {
field_index.push_back(index);
struct_index.push_back(i);
}
}
}
if (!field_index.empty()) {
int index = data->get<uint8_t>() % static_cast<int>(field_index.size());
GenerateRef(HeapType(struct_index[index]), data, kNullable);
if (builder->GetStructType(struct_index[index])
->field(field_index[index])
.is_packed()) {
builder_->EmitWithPrefix(data->get<bool>() ? kExprStructGetS
: kExprStructGetU);
} else {
builder_->EmitWithPrefix(kExprStructGet);
}
builder_->EmitU32V(struct_index[index]);
builder_->EmitU32V(field_index[index]);
return true;
}
return false;
}
template <ValueKind wanted_kind>
void struct_get(DataRange* data) {
bool got_struct_value =
struct_get_helper(ValueType::Primitive(wanted_kind), data);
if (!got_struct_value) {
Generate<wanted_kind>(data);
}
}
bool struct_get_ref(HeapType type, DataRange* data, Nullability nullable) {
ValueType needed_type = ValueType::RefMaybeNull(type, nullable);
return struct_get_helper(needed_type, data);
}
void struct_set(DataRange* data) {
WasmModuleBuilder* builder = builder_->builder();
if (num_structs_ > 0) {
int struct_index = data->get<uint8_t>() % num_structs_;
DCHECK(builder->IsStructType(struct_index));
const StructType* struct_type = builder->GetStructType(struct_index);
ZoneVector<uint32_t> field_indices(builder->zone());
for (uint32_t i = 0; i < struct_type->field_count(); i++) {
if (struct_type->mutability(i)) {
field_indices.push_back(i);
}
}
if (field_indices.empty()) {
return;
}
int field_index =
field_indices[data->get<uint8_t>() % field_indices.size()];
GenerateRef(HeapType(struct_index), data);
Generate(struct_type->field(field_index).Unpacked(), data);
builder_->EmitWithPrefix(kExprStructSet);
builder_->EmitU32V(struct_index);
builder_->EmitU32V(field_index);
}
}
template <ValueKind wanted_kind>
void ref_is_null(DataRange* data) {
GenerateRef(HeapType(HeapType::kAny), data);
builder_->Emit(kExprRefIsNull);
}
void ref_eq(DataRange* data) {
if (!liftoff_as_reference_) {
Generate(kWasmI32, data);
return;
}
GenerateRef(HeapType(HeapType::kEq), data);
GenerateRef(HeapType(HeapType::kEq), data);
builder_->Emit(kExprRefEq);
}
using GenerateFn = void (WasmGenerator::*const)(DataRange*);
using GenerateFnWithHeap = bool (WasmGenerator::*const)(HeapType, DataRange*,
Nullability);
template <size_t N>
void GenerateOneOf(GenerateFn (&alternatives)[N], DataRange* data) {
static_assert(N < std::numeric_limits<uint8_t>::max(),
"Too many alternatives. Use a bigger type if needed.");
const auto which = data->get<uint8_t>();
GenerateFn alternate = alternatives[which % N];
(this->*alternate)(data);
}
// Returns true if it had succesfully generated the reference
// and false otherwise.
template <size_t N>
bool GenerateOneOf(GenerateFnWithHeap (&alternatives)[N], HeapType type,
DataRange* data, Nullability nullability) {
static_assert(N < std::numeric_limits<uint8_t>::max(),
"Too many alternatives. Use a bigger type if needed.");
int index = data->get<uint8_t>() % (N + 1);
if (nullability && index == N) {
ref_null(type, data);
return true;
}
for (int i = index; i < static_cast<int>(N); i++) {
if ((this->*alternatives[i])(type, data, nullability)) {
return true;
}
}
for (int i = 0; i < index; i++) {
if ((this->*alternatives[i])(type, data, nullability)) {
return true;
}
}
if (nullability == kNullable) {
ref_null(type, data);
return true;
}
return false;
}
struct GeneratorRecursionScope {
explicit GeneratorRecursionScope(WasmGenerator* gen) : gen(gen) {
++gen->recursion_depth;
DCHECK_LE(gen->recursion_depth, kMaxRecursionDepth);
}
~GeneratorRecursionScope() {
DCHECK_GT(gen->recursion_depth, 0);
--gen->recursion_depth;
}
WasmGenerator* gen;
};
public:
WasmGenerator(WasmFunctionBuilder* fn, const std::vector<uint32_t>& functions,
const std::vector<ValueType>& globals,
const std::vector<uint8_t>& mutable_globals,
uint32_t num_structs, uint32_t num_arrays, DataRange* data,
bool liftoff_as_reference)
: builder_(fn),
functions_(functions),
globals_(globals),
mutable_globals_(mutable_globals),
num_structs_(num_structs),
num_arrays_(num_arrays),
liftoff_as_reference_(liftoff_as_reference) {
const FunctionSig* sig = fn->signature();
blocks_.emplace_back();
for (size_t i = 0; i < sig->return_count(); ++i) {
blocks_.back().push_back(sig->GetReturn(i));
}
constexpr uint32_t kMaxLocals = 32;
locals_.resize(data->get<uint8_t>() % kMaxLocals);
uint32_t num_types =
static_cast<uint32_t>(functions_.size()) + num_structs_ + num_arrays_;
for (ValueType& local : locals_) {
local = GetValueTypeHelper(data, liftoff_as_reference_, num_types,
num_types, kDisallowNonNullables,
kExcludePackedTypes, kIncludeGenerics);
fn->AddLocal(local);
}
}
void Generate(ValueType type, DataRange* data);
template <ValueKind T>
void Generate(DataRange* data);
template <ValueKind T1, ValueKind T2, ValueKind... Ts>
void Generate(DataRange* data) {
// TODO(clemensb): Implement a more even split.
auto first_data = data->split();
Generate<T1>(&first_data);
Generate<T2, Ts...>(data);
}
void GenerateRef(HeapType type, DataRange* data,
Nullability nullability = kNullable);
std::vector<ValueType> GenerateTypes(DataRange* data);
void Generate(base::Vector<const ValueType> types, DataRange* data);
void ConsumeAndGenerate(base::Vector<const ValueType> parameter_types,
base::Vector<const ValueType> return_types,
DataRange* data);
bool HasSimd() { return has_simd_; }
private:
WasmFunctionBuilder* builder_;
std::vector<std::vector<ValueType>> blocks_;
const std::vector<uint32_t>& functions_;
std::vector<ValueType> locals_;
std::vector<ValueType> globals_;
std::vector<uint8_t> mutable_globals_; // indexes into {globals_}.
uint32_t recursion_depth = 0;
std::vector<int> catch_blocks_;
bool has_simd_;
uint32_t num_structs_;
uint32_t num_arrays_;
bool liftoff_as_reference_;
static constexpr uint32_t kMaxRecursionDepth = 64;
bool recursion_limit_reached() {
return recursion_depth >= kMaxRecursionDepth;
}
};
template <>
void WasmGenerator::block<kVoid>(DataRange* data) {
block({}, {}, data);
}
template <>
void WasmGenerator::loop<kVoid>(DataRange* data) {
loop({}, {}, data);
}
template <>
void WasmGenerator::Generate<kVoid>(DataRange* data) {
GeneratorRecursionScope rec_scope(this);
if (recursion_limit_reached() || data->size() == 0) return;
constexpr GenerateFn alternatives[] = {
&WasmGenerator::sequence<kVoid, kVoid>,
&WasmGenerator::sequence<kVoid, kVoid, kVoid, kVoid>,
&WasmGenerator::sequence<kVoid, kVoid, kVoid, kVoid, kVoid, kVoid, kVoid,
kVoid>,
&WasmGenerator::block<kVoid>,
&WasmGenerator::loop<kVoid>,
&WasmGenerator::if_<kVoid, kIf>,
&WasmGenerator::if_<kVoid, kIfElse>,
&WasmGenerator::br,
&WasmGenerator::br_if<kVoid>,
&WasmGenerator::br_on_null<kVoid>,
&WasmGenerator::memop<kExprI32StoreMem, kI32>,
&WasmGenerator::memop<kExprI32StoreMem8, kI32>,
&WasmGenerator::memop<kExprI32StoreMem16, kI32>,
&WasmGenerator::memop<kExprI64StoreMem, kI64>,
&WasmGenerator::memop<kExprI64StoreMem8, kI64>,
&WasmGenerator::memop<kExprI64StoreMem16, kI64>,
&WasmGenerator::memop<kExprI64StoreMem32, kI64>,
&WasmGenerator::memop<kExprF32StoreMem, kF32>,
&WasmGenerator::memop<kExprF64StoreMem, kF64>,
&WasmGenerator::memop<kExprI32AtomicStore, kI32>,
&WasmGenerator::memop<kExprI32AtomicStore8U, kI32>,
&WasmGenerator::memop<kExprI32AtomicStore16U, kI32>,
&WasmGenerator::memop<kExprI64AtomicStore, kI64>,
&WasmGenerator::memop<kExprI64AtomicStore8U, kI64>,
&WasmGenerator::memop<kExprI64AtomicStore16U, kI64>,
&WasmGenerator::memop<kExprI64AtomicStore32U, kI64>,
&WasmGenerator::memop<kExprS128StoreMem, kS128>,
&WasmGenerator::simd_lane_memop<kExprS128Store8Lane, 16, kS128>,
&WasmGenerator::simd_lane_memop<kExprS128Store16Lane, 8, kS128>,
&WasmGenerator::simd_lane_memop<kExprS128Store32Lane, 4, kS128>,
&WasmGenerator::simd_lane_memop<kExprS128Store64Lane, 2, kS128>,
&WasmGenerator::drop,
&WasmGenerator::call<kVoid>,
&WasmGenerator::call_indirect<kVoid>,
&WasmGenerator::call_ref<kVoid>,
&WasmGenerator::set_local,
&WasmGenerator::set_global,
&WasmGenerator::throw_or_rethrow,
&WasmGenerator::try_block<kVoid>,
&WasmGenerator::struct_set,
&WasmGenerator::array_set,
&WasmGenerator::table_set,
&WasmGenerator::table_fill,
&WasmGenerator::table_copy};
GenerateOneOf(alternatives, data);
}
template <>
void WasmGenerator::Generate<kI32>(DataRange* data) {
GeneratorRecursionScope rec_scope(this);
if (recursion_limit_reached() || data->size() <= 1) {
builder_->EmitI32Const(data->get<uint32_t>());
return;
}
constexpr GenerateFn alternatives[] = {
&WasmGenerator::i32_const<1>,
&WasmGenerator::i32_const<2>,
&WasmGenerator::i32_const<3>,
&WasmGenerator::i32_const<4>,
&WasmGenerator::sequence<kI32, kVoid>,
&WasmGenerator::sequence<kVoid, kI32>,
&WasmGenerator::sequence<kVoid, kI32, kVoid>,
&WasmGenerator::op<kExprI32Eqz, kI32>,
&WasmGenerator::op<kExprI32Eq, kI32, kI32>,
&WasmGenerator::op<kExprI32Ne, kI32, kI32>,
&WasmGenerator::op<kExprI32LtS, kI32, kI32>,
&WasmGenerator::op<kExprI32LtU, kI32, kI32>,
&WasmGenerator::op<kExprI32GeS, kI32, kI32>,
&WasmGenerator::op<kExprI32GeU, kI32, kI32>,
&WasmGenerator::op<kExprI64Eqz, kI64>,
&WasmGenerator::op<kExprI64Eq, kI64, kI64>,
&WasmGenerator::op<kExprI64Ne, kI64, kI64>,
&WasmGenerator::op<kExprI64LtS, kI64, kI64>,
&WasmGenerator::op<kExprI64LtU, kI64, kI64>,
&WasmGenerator::op<kExprI64GeS, kI64, kI64>,
&WasmGenerator::op<kExprI64GeU, kI64, kI64>,
&WasmGenerator::op<kExprF32Eq, kF32, kF32>,
&WasmGenerator::op<kExprF32Ne, kF32, kF32>,
&WasmGenerator::op<kExprF32Lt, kF32, kF32>,
&WasmGenerator::op<kExprF32Ge, kF32, kF32>,
&WasmGenerator::op<kExprF64Eq, kF64, kF64>,
&WasmGenerator::op<kExprF64Ne, kF64, kF64>,
&WasmGenerator::op<kExprF64Lt, kF64, kF64>,
&WasmGenerator::op<kExprF64Ge, kF64, kF64>,
&WasmGenerator::op<kExprI32Add, kI32, kI32>,
&WasmGenerator::op<kExprI32Sub, kI32, kI32>,
&WasmGenerator::op<kExprI32Mul, kI32, kI32>,
&WasmGenerator::op<kExprI32DivS, kI32, kI32>,
&WasmGenerator::op<kExprI32DivU, kI32, kI32>,
&WasmGenerator::op<kExprI32RemS, kI32, kI32>,
&WasmGenerator::op<kExprI32RemU, kI32, kI32>,
&WasmGenerator::op<kExprI32And, kI32, kI32>,
&WasmGenerator::op<kExprI32Ior, kI32, kI32>,
&WasmGenerator::op<kExprI32Xor, kI32, kI32>,
&WasmGenerator::op<kExprI32Shl, kI32, kI32>,
&WasmGenerator::op<kExprI32ShrU, kI32, kI32>,
&WasmGenerator::op<kExprI32ShrS, kI32, kI32>,
&WasmGenerator::op<kExprI32Ror, kI32, kI32>,
&WasmGenerator::op<kExprI32Rol, kI32, kI32>,
&WasmGenerator::op<kExprI32Clz, kI32>,
&WasmGenerator::op<kExprI32Ctz, kI32>,
&WasmGenerator::op<kExprI32Popcnt, kI32>,
&WasmGenerator::op<kExprI32ConvertI64, kI64>,
&WasmGenerator::op<kExprI32SConvertF32, kF32>,
&WasmGenerator::op<kExprI32UConvertF32, kF32>,
&WasmGenerator::op<kExprI32SConvertF64, kF64>,
&WasmGenerator::op<kExprI32UConvertF64, kF64>,
&WasmGenerator::op<kExprI32ReinterpretF32, kF32>,
&WasmGenerator::op_with_prefix<kExprI32SConvertSatF32, kF32>,
&WasmGenerator::op_with_prefix<kExprI32UConvertSatF32, kF32>,
&WasmGenerator::op_with_prefix<kExprI32SConvertSatF64, kF64>,
&WasmGenerator::op_with_prefix<kExprI32UConvertSatF64, kF64>,
&WasmGenerator::block<kI32>,
&WasmGenerator::loop<kI32>,
&WasmGenerator::if_<kI32, kIfElse>,
&WasmGenerator::br_if<kI32>,
&WasmGenerator::br_on_null<kI32>,
&WasmGenerator::memop<kExprI32LoadMem>,
&WasmGenerator::memop<kExprI32LoadMem8S>,
&WasmGenerator::memop<kExprI32LoadMem8U>,
&WasmGenerator::memop<kExprI32LoadMem16S>,
&WasmGenerator::memop<kExprI32LoadMem16U>,
&WasmGenerator::memop<kExprI32AtomicLoad>,
&WasmGenerator::memop<kExprI32AtomicLoad8U>,
&WasmGenerator::memop<kExprI32AtomicLoad16U>,
&WasmGenerator::atomic_op<kExprI32AtomicAdd, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicSub, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicAnd, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicOr, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicXor, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicExchange, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicCompareExchange, kI32, kI32,
kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicAdd8U, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicSub8U, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicAnd8U, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicOr8U, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicXor8U, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicExchange8U, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicCompareExchange8U, kI32, kI32,
kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicAdd16U, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicSub16U, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicAnd16U, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicOr16U, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicXor16U, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicExchange16U, kI32, kI32>,
&WasmGenerator::atomic_op<kExprI32AtomicCompareExchange16U, kI32, kI32,
kI32>,
&WasmGenerator::op_with_prefix<kExprV128AnyTrue, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16AllTrue, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16BitMask, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8AllTrue, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8BitMask, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4AllTrue, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4BitMask, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2AllTrue, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2BitMask, kS128>,
&WasmGenerator::simd_lane_op<kExprI8x16ExtractLaneS, 16, kS128>,
&WasmGenerator::simd_lane_op<kExprI8x16ExtractLaneU, 16, kS128>,
&WasmGenerator::simd_lane_op<kExprI16x8ExtractLaneS, 8, kS128>,
&WasmGenerator::simd_lane_op<kExprI16x8ExtractLaneU, 8, kS128>,
&WasmGenerator::simd_lane_op<kExprI32x4ExtractLane, 4, kS128>,
&WasmGenerator::current_memory,
&WasmGenerator::grow_memory,
&WasmGenerator::get_local<kI32>,
&WasmGenerator::tee_local<kI32>,
&WasmGenerator::get_global<kI32>,
&WasmGenerator::op<kExprSelect, kI32, kI32, kI32>,
&WasmGenerator::select_with_type<kI32>,
&WasmGenerator::call<kI32>,
&WasmGenerator::call_indirect<kI32>,
&WasmGenerator::call_ref<kI32>,
&WasmGenerator::try_block<kI32>,
&WasmGenerator::i31_get,
&WasmGenerator::struct_get<kI32>,
&WasmGenerator::array_get<kI32>,
&WasmGenerator::array_len,
&WasmGenerator::ref_is_null<kI32>,
&WasmGenerator::ref_eq,
&WasmGenerator::table_size,
&WasmGenerator::table_grow};
GenerateOneOf(alternatives, data);
}
template <>
void WasmGenerator::Generate<kI64>(DataRange* data) {
GeneratorRecursionScope rec_scope(this);
if (recursion_limit_reached() || data->size() <= 1) {
builder_->EmitI64Const(data->get<int64_t>());
return;
}
constexpr GenerateFn alternatives[] = {
&WasmGenerator::i64_const<1>,
&WasmGenerator::i64_const<2>,
&WasmGenerator::i64_const<3>,
&WasmGenerator::i64_const<4>,
&WasmGenerator::i64_const<5>,
&WasmGenerator::i64_const<6>,
&WasmGenerator::i64_const<7>,
&WasmGenerator::i64_const<8>,
&WasmGenerator::sequence<kI64, kVoid>,
&WasmGenerator::sequence<kVoid, kI64>,
&WasmGenerator::sequence<kVoid, kI64, kVoid>,
&WasmGenerator::op<kExprI64Add, kI64, kI64>,
&WasmGenerator::op<kExprI64Sub, kI64, kI64>,
&WasmGenerator::op<kExprI64Mul, kI64, kI64>,
&WasmGenerator::op<kExprI64DivS, kI64, kI64>,
&WasmGenerator::op<kExprI64DivU, kI64, kI64>,
&WasmGenerator::op<kExprI64RemS, kI64, kI64>,
&WasmGenerator::op<kExprI64RemU, kI64, kI64>,
&WasmGenerator::op<kExprI64And, kI64, kI64>,
&WasmGenerator::op<kExprI64Ior, kI64, kI64>,
&WasmGenerator::op<kExprI64Xor, kI64, kI64>,
&WasmGenerator::op<kExprI64Shl, kI64, kI64>,
&WasmGenerator::op<kExprI64ShrU, kI64, kI64>,
&WasmGenerator::op<kExprI64ShrS, kI64, kI64>,
&WasmGenerator::op<kExprI64Ror, kI64, kI64>,
&WasmGenerator::op<kExprI64Rol, kI64, kI64>,
&WasmGenerator::op<kExprI64Clz, kI64>,
&WasmGenerator::op<kExprI64Ctz, kI64>,
&WasmGenerator::op<kExprI64Popcnt, kI64>,
&WasmGenerator::op_with_prefix<kExprI64SConvertSatF32, kF32>,
&WasmGenerator::op_with_prefix<kExprI64UConvertSatF32, kF32>,
&WasmGenerator::op_with_prefix<kExprI64SConvertSatF64, kF64>,
&WasmGenerator::op_with_prefix<kExprI64UConvertSatF64, kF64>,
&WasmGenerator::block<kI64>,
&WasmGenerator::loop<kI64>,
&WasmGenerator::if_<kI64, kIfElse>,
&WasmGenerator::br_if<kI64>,
&WasmGenerator::br_on_null<kI64>,
&WasmGenerator::memop<kExprI64LoadMem>,
&WasmGenerator::memop<kExprI64LoadMem8S>,
&WasmGenerator::memop<kExprI64LoadMem8U>,
&WasmGenerator::memop<kExprI64LoadMem16S>,
&WasmGenerator::memop<kExprI64LoadMem16U>,
&WasmGenerator::memop<kExprI64LoadMem32S>,
&WasmGenerator::memop<kExprI64LoadMem32U>,
&WasmGenerator::memop<kExprI64AtomicLoad>,
&WasmGenerator::memop<kExprI64AtomicLoad8U>,
&WasmGenerator::memop<kExprI64AtomicLoad16U>,
&WasmGenerator::memop<kExprI64AtomicLoad32U>,
&WasmGenerator::atomic_op<kExprI64AtomicAdd, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicSub, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicAnd, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicOr, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicXor, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicExchange, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicCompareExchange, kI32, kI64,
kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicAdd8U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicSub8U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicAnd8U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicOr8U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicXor8U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicExchange8U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicCompareExchange8U, kI32, kI64,
kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicAdd16U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicSub16U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicAnd16U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicOr16U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicXor16U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicExchange16U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicCompareExchange16U, kI32, kI64,
kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicAdd32U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicSub32U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicAnd32U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicOr32U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicXor32U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicExchange32U, kI32, kI64>,
&WasmGenerator::atomic_op<kExprI64AtomicCompareExchange32U, kI32, kI64,
kI64>,
&WasmGenerator::simd_lane_op<kExprI64x2ExtractLane, 2, kS128>,
&WasmGenerator::get_local<kI64>,
&WasmGenerator::tee_local<kI64>,
&WasmGenerator::get_global<kI64>,
&WasmGenerator::op<kExprSelect, kI64, kI64, kI32>,
&WasmGenerator::select_with_type<kI64>,
&WasmGenerator::call<kI64>,
&WasmGenerator::call_indirect<kI64>,
&WasmGenerator::call_ref<kI64>,
&WasmGenerator::try_block<kI64>,
&WasmGenerator::struct_get<kI64>,
&WasmGenerator::array_get<kI64>};
GenerateOneOf(alternatives, data);
}
template <>
void WasmGenerator::Generate<kF32>(DataRange* data) {
GeneratorRecursionScope rec_scope(this);
if (recursion_limit_reached() || data->size() <= sizeof(float)) {
builder_->EmitF32Const(data->get<float>());
return;
}
constexpr GenerateFn alternatives[] = {
&WasmGenerator::sequence<kF32, kVoid>,
&WasmGenerator::sequence<kVoid, kF32>,
&WasmGenerator::sequence<kVoid, kF32, kVoid>,
&WasmGenerator::op<kExprF32Abs, kF32>,
&WasmGenerator::op<kExprF32Neg, kF32>,
&WasmGenerator::op<kExprF32Ceil, kF32>,
&WasmGenerator::op<kExprF32Floor, kF32>,
&WasmGenerator::op<kExprF32Trunc, kF32>,
&WasmGenerator::op<kExprF32NearestInt, kF32>,
&WasmGenerator::op<kExprF32Sqrt, kF32>,
&WasmGenerator::op<kExprF32Add, kF32, kF32>,
&WasmGenerator::op<kExprF32Sub, kF32, kF32>,
&WasmGenerator::op<kExprF32Mul, kF32, kF32>,
&WasmGenerator::op<kExprF32Div, kF32, kF32>,
&WasmGenerator::op<kExprF32Min, kF32, kF32>,
&WasmGenerator::op<kExprF32Max, kF32, kF32>,
&WasmGenerator::op<kExprF32CopySign, kF32, kF32>,
&WasmGenerator::op<kExprF32SConvertI32, kI32>,
&WasmGenerator::op<kExprF32UConvertI32, kI32>,
&WasmGenerator::op<kExprF32SConvertI64, kI64>,
&WasmGenerator::op<kExprF32UConvertI64, kI64>,
&WasmGenerator::op<kExprF32ConvertF64, kF64>,
&WasmGenerator::op<kExprF32ReinterpretI32, kI32>,
&WasmGenerator::block<kF32>,
&WasmGenerator::loop<kF32>,
&WasmGenerator::if_<kF32, kIfElse>,
&WasmGenerator::br_if<kF32>,
&WasmGenerator::br_on_null<kF32>,
&WasmGenerator::memop<kExprF32LoadMem>,
&WasmGenerator::simd_lane_op<kExprF32x4ExtractLane, 4, kS128>,
&WasmGenerator::get_local<kF32>,
&WasmGenerator::tee_local<kF32>,
&WasmGenerator::get_global<kF32>,
&WasmGenerator::op<kExprSelect, kF32, kF32, kI32>,
&WasmGenerator::select_with_type<kF32>,
&WasmGenerator::call<kF32>,
&WasmGenerator::call_indirect<kF32>,
&WasmGenerator::call_ref<kF32>,
&WasmGenerator::try_block<kF32>,
&WasmGenerator::struct_get<kF32>,
&WasmGenerator::array_get<kF32>};
GenerateOneOf(alternatives, data);
}
template <>
void WasmGenerator::Generate<kF64>(DataRange* data) {
GeneratorRecursionScope rec_scope(this);
if (recursion_limit_reached() || data->size() <= sizeof(double)) {
builder_->EmitF64Const(data->get<double>());
return;
}
constexpr GenerateFn alternatives[] = {
&WasmGenerator::sequence<kF64, kVoid>,
&WasmGenerator::sequence<kVoid, kF64>,
&WasmGenerator::sequence<kVoid, kF64, kVoid>,
&WasmGenerator::op<kExprF64Abs, kF64>,
&WasmGenerator::op<kExprF64Neg, kF64>,
&WasmGenerator::op<kExprF64Ceil, kF64>,
&WasmGenerator::op<kExprF64Floor, kF64>,
&WasmGenerator::op<kExprF64Trunc, kF64>,
&WasmGenerator::op<kExprF64NearestInt, kF64>,
&WasmGenerator::op<kExprF64Sqrt, kF64>,
&WasmGenerator::op<kExprF64Add, kF64, kF64>,
&WasmGenerator::op<kExprF64Sub, kF64, kF64>,
&WasmGenerator::op<kExprF64Mul, kF64, kF64>,
&WasmGenerator::op<kExprF64Div, kF64, kF64>,
&WasmGenerator::op<kExprF64Min, kF64, kF64>,
&WasmGenerator::op<kExprF64Max, kF64, kF64>,
&WasmGenerator::op<kExprF64CopySign, kF64, kF64>,
&WasmGenerator::op<kExprF64SConvertI32, kI32>,
&WasmGenerator::op<kExprF64UConvertI32, kI32>,
&WasmGenerator::op<kExprF64SConvertI64, kI64>,
&WasmGenerator::op<kExprF64UConvertI64, kI64>,
&WasmGenerator::op<kExprF64ConvertF32, kF32>,
&WasmGenerator::op<kExprF64ReinterpretI64, kI64>,
&WasmGenerator::block<kF64>,
&WasmGenerator::loop<kF64>,
&WasmGenerator::if_<kF64, kIfElse>,
&WasmGenerator::br_if<kF64>,
&WasmGenerator::br_on_null<kF64>,
&WasmGenerator::memop<kExprF64LoadMem>,
&WasmGenerator::simd_lane_op<kExprF64x2ExtractLane, 2, kS128>,
&WasmGenerator::get_local<kF64>,
&WasmGenerator::tee_local<kF64>,
&WasmGenerator::get_global<kF64>,
&WasmGenerator::op<kExprSelect, kF64, kF64, kI32>,
&WasmGenerator::select_with_type<kF64>,
&WasmGenerator::call<kF64>,
&WasmGenerator::call_indirect<kF64>,
&WasmGenerator::call_ref<kF64>,
&WasmGenerator::try_block<kF64>,
&WasmGenerator::struct_get<kF64>,
&WasmGenerator::array_get<kF64>};
GenerateOneOf(alternatives, data);
}
template <>
void WasmGenerator::Generate<kS128>(DataRange* data) {
GeneratorRecursionScope rec_scope(this);
has_simd_ = true;
if (recursion_limit_reached() || data->size() <= sizeof(int32_t)) {
// TODO(v8:8460): v128.const is not implemented yet, and we need a way to
// "bottom-out", so use a splat to generate this.
builder_->EmitI32Const(data->get<int32_t>());
builder_->EmitWithPrefix(kExprI8x16Splat);
return;
}
constexpr GenerateFn alternatives[] = {
&WasmGenerator::simd_const,
&WasmGenerator::simd_lane_op<kExprI8x16ReplaceLane, 16, kS128, kI32>,
&WasmGenerator::simd_lane_op<kExprI16x8ReplaceLane, 8, kS128, kI32>,
&WasmGenerator::simd_lane_op<kExprI32x4ReplaceLane, 4, kS128, kI32>,
&WasmGenerator::simd_lane_op<kExprI64x2ReplaceLane, 2, kS128, kI64>,
&WasmGenerator::simd_lane_op<kExprF32x4ReplaceLane, 4, kS128, kF32>,
&WasmGenerator::simd_lane_op<kExprF64x2ReplaceLane, 2, kS128, kF64>,
&WasmGenerator::op_with_prefix<kExprI8x16Splat, kI32>,
&WasmGenerator::op_with_prefix<kExprI8x16Eq, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16Ne, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16LtS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16LtU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16GtS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16GtU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16LeS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16LeU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16GeS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16GeU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16Abs, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16Neg, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16Shl, kS128, kI32>,
&WasmGenerator::op_with_prefix<kExprI8x16ShrS, kS128, kI32>,
&WasmGenerator::op_with_prefix<kExprI8x16ShrU, kS128, kI32>,
&WasmGenerator::op_with_prefix<kExprI8x16Add, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16AddSatS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16AddSatU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16Sub, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16SubSatS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16SubSatU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16MinS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16MinU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16MaxS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16MaxU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16RoundingAverageU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16Popcnt, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8Splat, kI32>,
&WasmGenerator::op_with_prefix<kExprI16x8Eq, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8Ne, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8LtS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8LtU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8GtS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8GtU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8LeS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8LeU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8GeS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8GeU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8Abs, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8Neg, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8Shl, kS128, kI32>,
&WasmGenerator::op_with_prefix<kExprI16x8ShrS, kS128, kI32>,
&WasmGenerator::op_with_prefix<kExprI16x8ShrU, kS128, kI32>,
&WasmGenerator::op_with_prefix<kExprI16x8Add, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8AddSatS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8AddSatU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8Sub, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8SubSatS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8SubSatU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8Mul, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8MinS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8MinU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8MaxS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8MaxU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8RoundingAverageU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8ExtMulLowI8x16S, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8ExtMulLowI8x16U, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8ExtMulHighI8x16S, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8ExtMulHighI8x16U, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8Q15MulRSatS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8ExtAddPairwiseI8x16S, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8ExtAddPairwiseI8x16U, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4Splat, kI32>,
&WasmGenerator::op_with_prefix<kExprI32x4Eq, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4Ne, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4LtS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4LtU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4GtS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4GtU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4LeS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4LeU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4GeS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4GeU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4Abs, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4Neg, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4Shl, kS128, kI32>,
&WasmGenerator::op_with_prefix<kExprI32x4ShrS, kS128, kI32>,
&WasmGenerator::op_with_prefix<kExprI32x4ShrU, kS128, kI32>,
&WasmGenerator::op_with_prefix<kExprI32x4Add, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4Sub, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4Mul, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4MinS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4MinU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4MaxS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4MaxU, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4DotI16x8S, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4ExtMulLowI16x8S, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4ExtMulLowI16x8U, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4ExtMulHighI16x8S, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4ExtMulHighI16x8U, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4ExtAddPairwiseI16x8S, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4ExtAddPairwiseI16x8U, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2Splat, kI64>,
&WasmGenerator::op_with_prefix<kExprI64x2Eq, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2Ne, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2LtS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2GtS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2LeS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2GeS, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2Abs, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2Neg, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2Shl, kS128, kI32>,
&WasmGenerator::op_with_prefix<kExprI64x2ShrS, kS128, kI32>,
&WasmGenerator::op_with_prefix<kExprI64x2ShrU, kS128, kI32>,
&WasmGenerator::op_with_prefix<kExprI64x2Add, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2Sub, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2Mul, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2ExtMulLowI32x4S, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2ExtMulLowI32x4U, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2ExtMulHighI32x4S, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2ExtMulHighI32x4U, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Splat, kF32>,
&WasmGenerator::op_with_prefix<kExprF32x4Eq, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Ne, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Lt, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Gt, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Le, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Ge, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Abs, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Neg, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Sqrt, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Add, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Sub, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Mul, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Div, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Min, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Max, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Pmin, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Pmax, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Ceil, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Floor, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4Trunc, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4NearestInt, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Splat, kF64>,
&WasmGenerator::op_with_prefix<kExprF64x2Eq, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Ne, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Lt, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Gt, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Le, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Ge, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Abs, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Neg, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Sqrt, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Add, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Sub, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Mul, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Div, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Min, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Max, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Pmin, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Pmax, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Ceil, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Floor, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2Trunc, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2NearestInt, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2PromoteLowF32x4, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2ConvertLowI32x4S, kS128>,
&WasmGenerator::op_with_prefix<kExprF64x2ConvertLowI32x4U, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4DemoteF64x2Zero, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4TruncSatF64x2SZero, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4TruncSatF64x2UZero, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2SConvertI32x4Low, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2SConvertI32x4High, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2UConvertI32x4Low, kS128>,
&WasmGenerator::op_with_prefix<kExprI64x2UConvertI32x4High, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4SConvertF32x4, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4UConvertF32x4, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4SConvertI32x4, kS128>,
&WasmGenerator::op_with_prefix<kExprF32x4UConvertI32x4, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16SConvertI16x8, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI8x16UConvertI16x8, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8SConvertI32x4, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8UConvertI32x4, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8SConvertI8x16Low, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8SConvertI8x16High, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8UConvertI8x16Low, kS128>,
&WasmGenerator::op_with_prefix<kExprI16x8UConvertI8x16High, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4SConvertI16x8Low, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4SConvertI16x8High, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4UConvertI16x8Low, kS128>,
&WasmGenerator::op_with_prefix<kExprI32x4UConvertI16x8High, kS128>,
&WasmGenerator::op_with_prefix<kExprS128Not, kS128>,
&WasmGenerator::op_with_prefix<kExprS128And, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprS128AndNot, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprS128Or, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprS128Xor, kS128, kS128>,
&WasmGenerator::op_with_prefix<kExprS128Select, kS128, kS128, kS128>,
&WasmGenerator::simd_shuffle,
&WasmGenerator::op_with_prefix<kExprI8x16Swizzle, kS128, kS128>,
&WasmGenerator::memop<kExprS128LoadMem>,
&WasmGenerator::memop<kExprS128Load8x8S>,
&WasmGenerator::memop<kExprS128Load8x8U>,
&WasmGenerator::memop<kExprS128Load16x4S>,
&WasmGenerator::memop<kExprS128Load16x4U>,
&WasmGenerator::memop<kExprS128Load32x2S>,
&WasmGenerator::memop<kExprS128Load32x2U>,
&WasmGenerator::memop<kExprS128Load8Splat>,
&WasmGenerator::memop<kExprS128Load16Splat>,
&WasmGenerator::memop<kExprS128Load32Splat>,
&WasmGenerator::memop<kExprS128Load64Splat>,
&WasmGenerator::memop<kExprS128Load32Zero>,
&WasmGenerator::memop<kExprS128Load64Zero>,
&WasmGenerator::simd_lane_memop<kExprS128Load8Lane, 16, kS128>,
&WasmGenerator::simd_lane_memop<kExprS128Load16Lane, 8, kS128>,
&WasmGenerator::simd_lane_memop<kExprS128Load32Lane, 4, kS128>,
&WasmGenerator::simd_lane_memop<kExprS128Load64Lane, 2, kS128>,
};
GenerateOneOf(alternatives, data);
}
void WasmGenerator::grow_memory(DataRange* data) {
Generate<kI32>(data);
builder_->EmitWithU8(kExprMemoryGrow, 0);
}
void WasmGenerator::Generate(ValueType type, DataRange* data) {
switch (type.kind()) {
case kVoid:
return Generate<kVoid>(data);
case kI32:
return Generate<kI32>(data);
case kI64:
return Generate<kI64>(data);
case kF32:
return Generate<kF32>(data);
case kF64:
return Generate<kF64>(data);
case kS128:
return Generate<kS128>(data);
case kRefNull:
return GenerateRef(type.heap_type(), data, kNullable);
case kRef:
return GenerateRef(type.heap_type(), data, kNonNullable);
default:
UNREACHABLE();
}
}
void WasmGenerator::GenerateRef(HeapType type, DataRange* data,
Nullability nullability) {
base::Optional<GeneratorRecursionScope> rec_scope;
if (nullability) {
rec_scope.emplace(this);
}
if (recursion_limit_reached() || data->size() == 0) {
if (nullability == kNullable) {
ref_null(type, data);
return;
}
// It is ok not to return here because the non-nullable types are not
// recursive by construction, so the depth is limited already.
}
constexpr GenerateFnWithHeap alternatives_indexed_type[] = {
&WasmGenerator::new_object, &WasmGenerator::get_local_ref,
&WasmGenerator::array_get_ref, &WasmGenerator::struct_get_ref};
constexpr GenerateFnWithHeap alternatives_func_any[] = {
&WasmGenerator::table_get, &WasmGenerator::get_local_ref,
&WasmGenerator::array_get_ref, &WasmGenerator::struct_get_ref};
constexpr GenerateFnWithHeap alternatives_other[] = {
&WasmGenerator::array_get_ref, &WasmGenerator::get_local_ref,
&WasmGenerator::struct_get_ref};
switch (type.representation()) {
// For abstract types, sometimes generate one of their subtypes.
case HeapType::kAny: {
// Note: It is possible we land here even without {liftoff_as_reference_}.
// In this case, we do not support any subtyping, and just fall back to
// directly generating anyref.
if (!liftoff_as_reference_) {
DCHECK(nullability);
GenerateOneOf(alternatives_func_any, type, data, nullability);
return;
}
// Weighed according to the types in the module:
// If there are D data types and F function types, the relative
// frequencies for dataref is D, for funcref F, and for i31ref and falling
// back to anyref 2.
const uint8_t num_data_types = num_structs_ + num_arrays_;
const uint8_t num_function_types = functions_.size();
const uint8_t emit_i31ref = 2;
const uint8_t fallback_to_anyref = 2;
uint8_t random =
data->get<uint8_t>() % (num_data_types + num_function_types +
emit_i31ref + fallback_to_anyref);
// We have to compute this first so in case GenerateOneOf fails
// we will continue to fall back on an alternative that is guaranteed
// to generate a value of the wanted type.
// In order to know which alternative to fall back to in case
// GenerateOneOf failed, the random variable is recomputed.
if (random >= num_data_types + num_function_types + emit_i31ref) {
DCHECK(liftoff_as_reference_);
if (GenerateOneOf(alternatives_func_any, type, data, nullability)) {
return;
}
random = data->get<uint8_t>() %
(num_data_types + num_function_types + emit_i31ref);
}
if (random < num_data_types) {
GenerateRef(HeapType(HeapType::kData), data, nullability);
} else if (random < num_data_types + num_function_types) {
GenerateRef(HeapType(HeapType::kFunc), data, nullability);
} else {
GenerateRef(HeapType(HeapType::kI31), data, nullability);
}
return;
}
case HeapType::kArray: {
DCHECK(liftoff_as_reference_);
constexpr uint8_t fallback_to_dataref = 1;
uint8_t random =
data->get<uint8_t>() % (num_arrays_ + fallback_to_dataref);
// Try generating one of the alternatives and continue to the rest of the
// methods in case it fails.
if (random >= num_arrays_) {
if (GenerateOneOf(alternatives_other, type, data, nullability)) return;
random = data->get<uint8_t>() % num_arrays_;
}
GenerateRef(HeapType(random), data, nullability);
return;
}
case HeapType::kData: {
DCHECK(liftoff_as_reference_);
constexpr uint8_t fallback_to_dataref = 2;
uint8_t random = data->get<uint8_t>() %
(num_arrays_ + num_structs_ + fallback_to_dataref);
// Try generating one of the alternatives
// and continue to the rest of the methods in case it fails.
if (random >= num_arrays_ + num_structs_) {
if (GenerateOneOf(alternatives_other, type, data, nullability)) {
return;
}
random = data->get<uint8_t>() % (num_arrays_ + num_structs_);
}
GenerateRef(HeapType(random), data, nullability);
return;
}
case HeapType::kEq: {
DCHECK(liftoff_as_reference_);
const uint8_t num_types = num_arrays_ + num_structs_;
const uint8_t emit_i31ref = 2;
constexpr uint8_t fallback_to_eqref = 1;
uint8_t random =
data->get<uint8_t>() % (num_types + emit_i31ref + fallback_to_eqref);
// Try generating one of the alternatives
// and continue to the rest of the methods in case it fails.
if (random >= num_types + emit_i31ref) {
if (GenerateOneOf(alternatives_other, type, data, nullability)) {
return;
}
random = data->get<uint8_t>() % (num_types + emit_i31ref);
}
if (random < num_types) {
GenerateRef(HeapType(random), data, nullability);
} else {
GenerateRef(HeapType(HeapType::kI31), data, nullability);
}
return;
}
case HeapType::kFunc: {
uint32_t random = data->get<uint32_t>() % (functions_.size() + 1);
/// Try generating one of the alternatives
// and continue to the rest of the methods in case it fails.
if (random >= functions_.size()) {
if (GenerateOneOf(alternatives_func_any, type, data, nullability)) {
return;
}
random = data->get<uint32_t>() % functions_.size();
}
if (liftoff_as_reference_) {
// Only reduce to indexed type with liftoff as reference.
uint32_t signature_index = functions_[random];
DCHECK(builder_->builder()->IsSignature(signature_index));
GenerateRef(HeapType(signature_index), data, nullability);
} else {
// If interpreter is used as reference, generate a ref.func directly.
builder_->EmitWithU32V(kExprRefFunc, random);
}
return;
}
case HeapType::kI31: {
DCHECK(liftoff_as_reference_);
// Try generating one of the alternatives
// and continue to the rest of the methods in case it fails.
if (data->get<bool>() &&
GenerateOneOf(alternatives_other, type, data, nullability)) {
return;
}
Generate(kWasmI32, data);
builder_->EmitWithPrefix(kExprI31New);
return;
}
case HeapType::kExtern:
DCHECK(nullability == Nullability::kNullable);
ref_null(type, data);
return;
default:
// Indexed type.
DCHECK(liftoff_as_reference_);
GenerateOneOf(alternatives_indexed_type, type, data, nullability);
return;
}
UNREACHABLE();
}
std::vector<ValueType> WasmGenerator::GenerateTypes(DataRange* data) {
std::vector<ValueType> types;
int num_params = int{data->get<uint8_t>()} % (kMaxParameters + 1);
for (int i = 0; i < num_params; ++i) {
types.push_back(GetValueType(
data, liftoff_as_reference_,
num_structs_ + num_arrays_ + static_cast<uint32_t>(functions_.size())));
}
return types;
}
void WasmGenerator::Generate(base::Vector<const ValueType> types,
DataRange* data) {
// Maybe emit a multi-value block with the expected return type. Use a
// non-default value to indicate block generation to avoid recursion when we
// reach the end of the data.
bool generate_block = data->get<uint8_t>() % 32 == 1;
if (generate_block) {
GeneratorRecursionScope rec_scope(this);
if (!recursion_limit_reached()) {
const auto param_types = GenerateTypes(data);
Generate(base::VectorOf(param_types), data);
any_block(base::VectorOf(param_types), types, data);
return;
}
}
if (types.size() == 0) {
Generate(kWasmVoid, data);
return;
}
if (types.size() == 1) {
Generate(types[0], data);
return;
}
// Split the types in two halves and recursively generate each half.
// Each half is non empty to ensure termination.
size_t split_index = data->get<uint8_t>() % (types.size() - 1) + 1;
base::Vector<const ValueType> lower_half = types.SubVector(0, split_index);
base::Vector<const ValueType> upper_half =
types.SubVector(split_index, types.size());
DataRange first_range = data->split();
Generate(lower_half, &first_range);
Generate(upper_half, data);
}
// Emit code to match an arbitrary signature.
// TODO(11954): Add the missing reference type conversion/upcasting.
void WasmGenerator::ConsumeAndGenerate(
base::Vector<const ValueType> param_types,
base::Vector<const ValueType> return_types, DataRange* data) {
// This numeric conversion logic consists of picking exactly one
// index in the return values and dropping all the values that come
// before that index. Then we convert the value from that index to the
// wanted type. If we don't find any value we generate it.
auto primitive = [](ValueType t) -> bool {
switch (t.kind()) {
case kI32:
case kI64:
case kF32:
case kF64:
return true;
default:
return false;
}
};
if (return_types.size() == 0 || param_types.size() == 0 ||
!primitive(return_types[0])) {
for (unsigned i = 0; i < param_types.size(); i++) {
builder_->Emit(kExprDrop);
}
Generate(return_types, data);
return;
}
int bottom_primitives = 0;
while (static_cast<int>(param_types.size()) > bottom_primitives &&
primitive(param_types[bottom_primitives])) {
bottom_primitives++;
}
int return_index =
bottom_primitives > 0 ? (data->get<uint8_t>() % bottom_primitives) : -1;
for (int i = static_cast<int>(param_types.size() - 1); i > return_index;
--i) {
builder_->Emit(kExprDrop);
}
for (int i = return_index; i > 0; --i) {
Convert(param_types[i], param_types[i - 1]);
builder_->EmitI32Const(0);
builder_->Emit(kExprSelect);
}
DCHECK(!return_types.empty());
if (return_index >= 0) {
Convert(param_types[0], return_types[0]);
Generate(return_types + 1, data);
} else {
Generate(return_types, data);
}
}
enum SigKind { kFunctionSig, kExceptionSig };
FunctionSig* GenerateSig(Zone* zone, DataRange* data, SigKind sig_kind,
bool liftoff_as_reference, int num_types) {
// Generate enough parameters to spill some to the stack.
int num_params = int{data->get<uint8_t>()} % (kMaxParameters + 1);
int num_returns = sig_kind == kFunctionSig
? int{data->get<uint8_t>()} % (kMaxReturns + 1)
: 0;
FunctionSig::Builder builder(zone, num_returns, num_params);
for (int i = 0; i < num_returns; ++i) {
builder.AddReturn(GetValueType(data, liftoff_as_reference, num_types));
}
for (int i = 0; i < num_params; ++i) {
builder.AddParam(GetValueType(data, liftoff_as_reference, num_types));
}
return builder.Build();
}
WasmInitExpr GenerateInitExpr(Zone* zone, WasmModuleBuilder* builder,
ValueType type,
uint32_t num_struct_and_array_types);
WasmInitExpr GenerateStructNewInitExpr(Zone* zone, WasmModuleBuilder* builder,
uint32_t index,
uint32_t num_struct_and_array_types) {
const StructType* struct_type = builder->GetStructType(index);
ZoneVector<WasmInitExpr>* elements =
zone->New<ZoneVector<WasmInitExpr>>(zone);
int field_count = struct_type->field_count();
for (int field_index = 0; field_index < field_count; field_index++) {
elements->push_back(GenerateInitExpr(zone, builder,
struct_type->field(field_index),
num_struct_and_array_types));
}
return WasmInitExpr::StructNew(index, elements);
}
WasmInitExpr GenerateInitExpr(Zone* zone, WasmModuleBuilder* builder,
ValueType type,
uint32_t num_struct_and_array_types) {
switch (type.kind()) {
case kRefNull:
return WasmInitExpr::RefNullConst(type.heap_type().representation());
case kI8:
case kI16:
case kI32:
return WasmInitExpr(int32_t{0});
case kI64:
return WasmInitExpr(int64_t{0});
case kF32:
return WasmInitExpr(0.0f);
case kF64:
return WasmInitExpr(0.0);
case kS128: {
uint8_t s128_const[kSimd128Size] = {0};
return WasmInitExpr(s128_const);
}
case kRef: {
switch (type.heap_type().representation()) {
case HeapType::kData:
case HeapType::kAny:
case HeapType::kEq: {
// We materialize all these types with a struct because they are all
// its supertypes.
DCHECK(builder->IsStructType(0));
return GenerateStructNewInitExpr(zone, builder, 0,
num_struct_and_array_types);
}
case HeapType::kFunc:
// We just pick the function at index 0.
DCHECK_GT(builder->NumFunctions(), 0);
return WasmInitExpr::RefFuncConst(0);
default: {
uint32_t index = type.ref_index();
if (builder->IsStructType(index)) {
return GenerateStructNewInitExpr(zone, builder, index,
num_struct_and_array_types);
}
if (builder->IsArrayType(index)) {
ZoneVector<WasmInitExpr>* elements =
zone->New<ZoneVector<WasmInitExpr>>(zone);
elements->push_back(GenerateInitExpr(
zone, builder, builder->GetArrayType(index)->element_type(),
num_struct_and_array_types));
return WasmInitExpr::ArrayNewFixedStatic(index, elements);
}
if (builder->IsSignature(index)) {
// Transform from signature index to function index.
return WasmInitExpr::RefFuncConst(index -
num_struct_and_array_types);
}
UNREACHABLE();
}
}
}
case kVoid:
case kRtt:
case kBottom:
UNREACHABLE();
}
}
} // namespace
class WasmCompileFuzzer : public WasmExecutionFuzzer {
bool GenerateModule(Isolate* isolate, Zone* zone,
base::Vector<const uint8_t> data, ZoneBuffer* buffer,
bool liftoff_as_reference) override {
TestSignatures sigs;
WasmModuleBuilder builder(zone);
DataRange range(data);
std::vector<uint32_t> function_signatures;
// Add struct and array types first so that we get a chance to generate
// these types in function signatures.
// Currently, WasmGenerator assumes this order for struct/array/signature
// definitions.
uint8_t num_structs = 0;
uint8_t num_arrays = 0;
static_assert(kMaxFunctions >= 1, "need min. 1 function");
uint8_t num_functions = 1 + (range.get<uint8_t>() % kMaxFunctions);
uint16_t num_types = num_functions;
if (liftoff_as_reference) {
// We need at least one struct/array in order to support WasmInitExpr
// for kData, kAny and kEq.
num_structs = 1 + range.get<uint8_t>() % kMaxStructs;
num_arrays = range.get<uint8_t>() % (kMaxArrays + 1);
num_types += num_structs + num_arrays;
for (int struct_index = 0; struct_index < num_structs; struct_index++) {
uint8_t num_fields = range.get<uint8_t>() % (kMaxStructFields + 1);
StructType::Builder struct_builder(zone, num_fields);
for (int field_index = 0; field_index < num_fields; field_index++) {
// Notes:
// - We allow a type to only have non-nullable fields of types that
// are defined earlier. This way we avoid infinite non-nullable
// constructions. Also relevant for arrays and functions.
// - Currently, we also allow nullable fields to only reference types
// that are defined earlier. The reason is that every type can only
// reference types in its own or earlier recursive groups, and we do
// not support recursive groups yet. Also relevant for arrays and
// functions. TODO(7748): Change the number of nullable types once
// we support rec. groups.
// - We exclude the generics types anyref, dataref, and eqref from the
// fields of struct 0. This is because in GenerateInitExpr we
// materialize these types with (ref 0), and having such fields in
// struct 0 would produce an infinite recursion.
ValueType type = GetValueTypeHelper(
&range, true, builder.NumTypes(), builder.NumTypes(),
kAllowNonNullables, kIncludePackedTypes,
struct_index != 0 ? kIncludeGenerics : kExcludeGenerics);
bool mutability = range.get<bool>();
struct_builder.AddField(type, mutability);
}
StructType* struct_fuz = struct_builder.Build();
builder.AddStructType(struct_fuz);
}
for (int array_index = 0; array_index < num_arrays; array_index++) {
ValueType type = GetValueTypeHelper(
&range, true, builder.NumTypes(), builder.NumTypes(),
kAllowNonNullables, kIncludePackedTypes, kIncludeGenerics);
ArrayType* array_fuz = zone->New<ArrayType>(type, true);
builder.AddArrayType(array_fuz);
}
}
// We keep the signature for the first (main) function constant.
function_signatures.push_back(builder.ForceAddSignature(sigs.i_iii()));
for (uint8_t i = 1; i < num_functions; i++) {
FunctionSig* sig = GenerateSig(zone, &range, kFunctionSig,
liftoff_as_reference, builder.NumTypes());
uint32_t signature_index = builder.ForceAddSignature(sig);
function_signatures.push_back(signature_index);
}
int num_exceptions = 1 + (range.get<uint8_t>() % kMaxExceptions);
for (int i = 0; i < num_exceptions; ++i) {
FunctionSig* sig = GenerateSig(zone, &range, kExceptionSig,
liftoff_as_reference, num_types);
builder.AddException(sig);
}
// Generate function declarations before tables. This will be needed once we
// have typed-function tables.
std::vector<WasmFunctionBuilder*> functions;
for (uint8_t i = 0; i < num_functions; i++) {
const FunctionSig* sig = builder.GetSignature(function_signatures[i]);
// If we are using wasm-gc, we cannot allow signature normalization
// performed by adding a function by {FunctionSig}, because we emit
// everything in one recursive group which blocks signature
// canonicalization.
// TODO(7748): Relax this when we implement type canonicalization and
// proper recursive-group support.
functions.push_back(liftoff_as_reference
? builder.AddFunction(function_signatures[i])
: builder.AddFunction(sig));
}
int num_globals = range.get<uint8_t>() % (kMaxGlobals + 1);
std::vector<ValueType> globals;
std::vector<uint8_t> mutable_globals;
globals.reserve(num_globals);
mutable_globals.reserve(num_globals);
for (int i = 0; i < num_globals; ++i) {
ValueType type = GetValueTypeHelper(
&range, liftoff_as_reference, num_types, num_types,
kAllowNonNullables, kExcludePackedTypes, kIncludeGenerics);
// 1/8 of globals are immutable.
const bool mutability = (range.get<uint8_t>() % 8) != 0;
builder.AddGlobal(
type, mutability,
GenerateInitExpr(zone, &builder, type,
static_cast<uint32_t>(num_structs + num_arrays)));
globals.push_back(type);
if (mutability) mutable_globals.push_back(static_cast<uint8_t>(i));
}
// Generate tables before function bodies, so they are available for table
// operations.
// Always generate at least one table for call_indirect.
int num_tables = range.get<uint8_t>() % kMaxTables + 1;
for (int i = 0; i < num_tables; i++) {
// Table 0 has to reference all functions in the program. This is so that
// all functions count as declared so they can be referenced with
// ref.func.
// TODO(11954): Consider removing this restriction.
uint32_t min_size =
i == 0 ? num_functions : range.get<uint8_t>() % kMaxTableSize;
uint32_t max_size =
range.get<uint8_t>() % (kMaxTableSize - min_size) + min_size;
// Table 0 is always funcref.
// TODO(11954): Remove this requirement once we support call_indirect with
// other table indices.
// TODO(11954): Support typed function tables.
bool use_funcref = i == 0 || range.get<bool>();
ValueType type = use_funcref ? kWasmFuncRef : kWasmExternRef;
uint32_t table_index = builder.AddTable(type, min_size, max_size);
if (type == kWasmFuncRef) {
// For function tables, initialize them with functions from the program.
// Currently, the fuzzer assumes that every function table contains the
// functions in the program in the order they are defined.
// TODO(11954): Consider generalizing this.
WasmModuleBuilder::WasmElemSegment segment(
zone, kWasmFuncRef, table_index, WasmInitExpr(0));
for (int entry_index = 0; entry_index < static_cast<int>(min_size);
entry_index++) {
segment.entries.emplace_back(
WasmModuleBuilder::WasmElemSegment::Entry::kRefFuncEntry,
entry_index % num_functions);
}
builder.AddElementSegment(std::move(segment));
}
}
for (int i = 0; i < num_functions; ++i) {
WasmFunctionBuilder* f = functions[i];
DataRange function_range = range.split();
WasmGenerator gen(f, function_signatures, globals, mutable_globals,
num_structs, num_arrays, &function_range,
liftoff_as_reference);
const FunctionSig* sig = f->signature();
base::Vector<const ValueType> return_types(sig->returns().begin(),
sig->return_count());
gen.Generate(return_types, &function_range);
if (!CheckHardwareSupportsSimd() && gen.HasSimd()) return false;
f->Emit(kExprEnd);
if (i == 0) builder.AddExport(base::CStrVector("main"), f);
}
builder.SetMaxMemorySize(32);
builder.WriteTo(buffer);
return true;
}
};
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
constexpr bool require_valid = true;
EXPERIMENTAL_FLAG_SCOPE(typed_funcref);
EXPERIMENTAL_FLAG_SCOPE(gc);
EXPERIMENTAL_FLAG_SCOPE(simd);
EXPERIMENTAL_FLAG_SCOPE(eh);
WasmCompileFuzzer().FuzzWasmModule({data, size}, require_valid);
return 0;
}
} // namespace fuzzer
} // namespace wasm
} // namespace internal
} // namespace v8
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