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wasm-watermarker
Commit 13636cc1 authored by nagayama15's avatar nagayama15
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Stricter side effect checking

parent 3721b380
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Showing with 121 additions and 100 deletions
src/kyut/pass/operand_swapping_watermarker.cpp
View file @ 13636cc1
......@@ -4,10 +4,11 @@
#include "../commutativity.hpp"
#include "../comparison.hpp"
#include "../side_effect.hpp"
namespace kyut::pass {
class OperandSwappingWatermarkingVisitor
: public wasm::OverriddenVisitor<OperandSwappingWatermarkingVisitor, bool> {
: public wasm::OverriddenVisitor<OperandSwappingWatermarkingVisitor, SideEffect> {
public:
explicit OperandSwappingWatermarkingVisitor(CircularBitStream &stream)
: stream_(stream) {}
......@@ -20,34 +21,34 @@ namespace kyut::pass {
~OperandSwappingWatermarkingVisitor() noexcept = default;
bool visitBlock(wasm::Block *curr) {
bool has_side_effect = false;
SideEffect visitBlock(wasm::Block *curr) {
auto side_effect = SideEffect::none;
for (const auto &expr : curr->list) {
has_side_effect = visit(expr) || has_side_effect;
side_effect = (std::max)(visit(expr), side_effect);
}
return has_side_effect;
return side_effect;
}
bool visitIf(wasm::If *curr) {
bool has_side_effect = false;
SideEffect visitIf(wasm::If *curr) {
auto side_effect = SideEffect::none;
has_side_effect = visit(curr->condition) || has_side_effect;
has_side_effect = visit(curr->ifTrue) || has_side_effect;
side_effect = (std::max)(visit(curr->condition), side_effect);
side_effect = (std::max)(visit(curr->ifTrue), side_effect);
if (curr->ifFalse) {
has_side_effect = visit(curr->ifFalse) || has_side_effect;
side_effect = (std::max)(visit(curr->ifFalse), side_effect);
}
return has_side_effect;
return side_effect;
}
bool visitLoop(wasm::Loop *curr) {
SideEffect visitLoop(wasm::Loop *curr) {
return visit(curr->body);
}
bool visitBreak(wasm::Break *curr) {
SideEffect visitBreak(wasm::Break *curr) {
if (curr->condition) {
visit(curr->condition);
}
......@@ -56,172 +57,174 @@ namespace kyut::pass {
visit(curr->value);
}
return true;
return SideEffect::write;
}
bool visitSwitch(wasm::Switch *curr) {
SideEffect visitSwitch(wasm::Switch *curr) {
visit(curr->condition);
if (curr->value) {
visit(curr->value);
}
return true;
return SideEffect::write;
}
bool visitCall(wasm::Call *curr) {
SideEffect visitCall(wasm::Call *curr) {
for (const auto &expr : curr->operands) {
visit(expr);
}
return true;
return SideEffect::write;
}
bool visitCallIndirect(wasm::CallIndirect *curr) {
SideEffect visitCallIndirect(wasm::CallIndirect *curr) {
visit(curr->target);
for (const auto &expr : curr->operands) {
visit(expr);
}
return true;
return SideEffect::write;
}
bool visitGetLocal([[maybe_unused]] wasm::GetLocal *curr) {
return false;
SideEffect visitGetLocal([[maybe_unused]] wasm::GetLocal *curr) {
return SideEffect::read;
}
bool visitSetLocal(wasm::SetLocal *curr) {
SideEffect visitSetLocal(wasm::SetLocal *curr) {
visit(curr->value);
return true;
return SideEffect::write;
}
bool visitGetGlobal([[maybe_unused]] wasm::GetGlobal *curr) {
return false;
SideEffect visitGetGlobal([[maybe_unused]] wasm::GetGlobal *curr) {
return SideEffect::read;
}
bool visitSetGlobal(wasm::SetGlobal *curr) {
SideEffect visitSetGlobal(wasm::SetGlobal *curr) {
visit(curr->value);
return true;
return SideEffect::write;
}
bool visitLoad(wasm::Load *curr) {
return visit(curr->ptr);
SideEffect visitLoad(wasm::Load *curr) {
return (std::max)(visit(curr->ptr), SideEffect::read);
}
bool visitStore(wasm::Store *curr) {
SideEffect visitStore(wasm::Store *curr) {
visit(curr->ptr);
visit(curr->value);
return true;
return SideEffect::write;
}
bool visitAtomicRMW(wasm::AtomicRMW *curr) {
SideEffect visitAtomicRMW(wasm::AtomicRMW *curr) {
visit(curr->ptr);
visit(curr->value);
return true;
return SideEffect::write;
}
bool visitAtomicCmpxchg(wasm::AtomicCmpxchg *curr) {
SideEffect visitAtomicCmpxchg(wasm::AtomicCmpxchg *curr) {
visit(curr->ptr);
visit(curr->expected);
visit(curr->replacement);
return true;
return SideEffect::write;
}
bool visitAtomicWait(wasm::AtomicWait *curr) {
SideEffect visitAtomicWait(wasm::AtomicWait *curr) {
visit(curr->ptr);
visit(curr->expected);
visit(curr->timeout);
return true;
return SideEffect::write;
}
bool visitAtomicNotify(wasm::AtomicNotify *curr) {
SideEffect visitAtomicNotify(wasm::AtomicNotify *curr) {
visit(curr->ptr);
visit(curr->notifyCount);
return true;
return SideEffect::write;
}
bool visitSIMDExtract(wasm::SIMDExtract *curr) {
SideEffect visitSIMDExtract(wasm::SIMDExtract *curr) {
return visit(curr->vec);
}
bool visitSIMDReplace(wasm::SIMDReplace *curr) {
bool has_side_effect = false;
SideEffect visitSIMDReplace(wasm::SIMDReplace *curr) {
auto side_effect = SideEffect::none;
has_side_effect = visit(curr->vec) || has_side_effect;
has_side_effect = visit(curr->value) || has_side_effect;
side_effect = (std::max)(visit(curr->vec), side_effect);
side_effect = (std::max)(visit(curr->value), side_effect);
return has_side_effect;
return side_effect;
}
bool visitSIMDShuffle(wasm::SIMDShuffle *curr) {
bool has_side_effect = false;
SideEffect visitSIMDShuffle(wasm::SIMDShuffle *curr) {
auto side_effect = SideEffect::none;
has_side_effect = visit(curr->left) || has_side_effect;
has_side_effect = visit(curr->right) || has_side_effect;
side_effect = (std::max)(visit(curr->left), side_effect);
side_effect = (std::max)(visit(curr->right), side_effect);
return has_side_effect;
return side_effect;
}
bool visitSIMDBitselect(wasm::SIMDBitselect *curr) {
bool has_side_effect = false;
SideEffect visitSIMDBitselect(wasm::SIMDBitselect *curr) {
auto side_effect = SideEffect::none;
has_side_effect = visit(curr->cond) || has_side_effect;
has_side_effect = visit(curr->left) || has_side_effect;
has_side_effect = visit(curr->right) || has_side_effect;
side_effect = (std::max)(visit(curr->cond), side_effect);
side_effect = (std::max)(visit(curr->left), side_effect);
side_effect = (std::max)(visit(curr->right), side_effect);
return has_side_effect;
return side_effect;
}
bool visitSIMDShift(wasm::SIMDShift *curr) {
bool has_side_effect = false;
SideEffect visitSIMDShift(wasm::SIMDShift *curr) {
auto side_effect = SideEffect::none;
has_side_effect = visit(curr->vec) || has_side_effect;
has_side_effect = visit(curr->shift) || has_side_effect;
side_effect = (std::max)(visit(curr->vec), side_effect);
side_effect = (std::max)(visit(curr->shift), side_effect);
return has_side_effect;
return side_effect;
}
bool visitMemoryInit(wasm::MemoryInit *curr) {
SideEffect visitMemoryInit(wasm::MemoryInit *curr) {
visit(curr->dest);
visit(curr->offset);
visit(curr->size);
return true;
return SideEffect::write;
}
bool visitDataDrop([[maybe_unused]] wasm::DataDrop *curr) {
return true;
SideEffect visitDataDrop([[maybe_unused]] wasm::DataDrop *curr) {
return SideEffect::write;
}
bool visitMemoryCopy(wasm::MemoryCopy *curr) {
SideEffect visitMemoryCopy(wasm::MemoryCopy *curr) {
visit(curr->dest);
visit(curr->source);
visit(curr->size);
return true;
return SideEffect::write;
}
bool visitMemoryFill(wasm::MemoryFill *curr) {
SideEffect visitMemoryFill(wasm::MemoryFill *curr) {
visit(curr->dest);
visit(curr->value);
visit(curr->size);
return true;
return SideEffect::write;
}
bool visitConst([[maybe_unused]] wasm::Const *curr) {
return false;
SideEffect visitConst([[maybe_unused]] wasm::Const *curr) {
return SideEffect::none;
}
bool visitUnary(wasm::Unary *curr) {
SideEffect visitUnary(wasm::Unary *curr) {
return visit(curr->value);
}
bool visitBinary(wasm::Binary *curr) {
bool has_side_effect = false;
SideEffect visitBinary(wasm::Binary *curr) {
auto side_effect_left = visit(curr->left);
auto side_effect_right = visit(curr->right);
has_side_effect = visit(curr->left) || has_side_effect;
has_side_effect = visit(curr->right) || has_side_effect;
// operands can be swapped if [write(=2), none(=0)] or [read(=1), read(=1)]
auto can_swap_operands =
(static_cast<std::int32_t>(side_effect_left) + static_cast<std::int32_t>(side_effect_left) <= 2);
if (isCommutative(curr->op) && !has_side_effect) {
if (isCommutative(curr->op) && can_swap_operands) {
const auto bit = stream_.read_bit();
if (bit == (*curr->left < *curr->right)) {
......@@ -229,65 +232,69 @@ namespace kyut::pass {
}
}
return has_side_effect;
return (std::max)(side_effect_left, side_effect_right);
}
bool visitSelect(wasm::Select *curr) {
bool has_side_effect = false;
SideEffect visitSelect(wasm::Select *curr) {
auto side_effect = SideEffect::none;
has_side_effect = visit(curr->condition) || has_side_effect;
has_side_effect = visit(curr->ifTrue) || has_side_effect;
has_side_effect = visit(curr->ifFalse) || has_side_effect;
side_effect = (std::max)(visit(curr->condition), side_effect);
side_effect = (std::max)(visit(curr->ifTrue), side_effect);
side_effect = (std::max)(visit(curr->ifFalse), side_effect);
return has_side_effect;
return side_effect;
}
bool visitDrop(wasm::Drop *curr) {
SideEffect visitDrop(wasm::Drop *curr) {
return visit(curr->value);
}
bool visitReturn(wasm::Return *curr) {
SideEffect visitReturn(wasm::Return *curr) {
if (curr->value) {
visit(curr->value);
}
return true;
return SideEffect::write;
}
bool visitHost(wasm::Host *curr) {
SideEffect visitHost(wasm::Host *curr) {
for (const auto &expr : curr->operands) {
visit(expr);
}
return curr->op != wasm::HostOp::CurrentMemory;
if (curr->op == wasm::HostOp::CurrentMemory) {
return SideEffect::read;
} else {
return SideEffect::write;
}
}
bool visitNop([[maybe_unused]] wasm::Nop *curr) {
return false;
SideEffect visitNop([[maybe_unused]] wasm::Nop *curr) {
return SideEffect::none;
}
bool visitUnreachable([[maybe_unused]] wasm::Unreachable *curr) {
SideEffect visitUnreachable([[maybe_unused]] wasm::Unreachable *curr) {
WASM_UNREACHABLE();
}
bool visitFunctionType([[maybe_unused]] wasm::FunctionType *curr) {
SideEffect visitFunctionType([[maybe_unused]] wasm::FunctionType *curr) {
WASM_UNREACHABLE();
}
bool visitExport([[maybe_unused]] wasm::Export *curr) {
SideEffect visitExport([[maybe_unused]] wasm::Export *curr) {
WASM_UNREACHABLE();
}
bool visitGlobal([[maybe_unused]] wasm::Global *curr) {
SideEffect visitGlobal([[maybe_unused]] wasm::Global *curr) {
WASM_UNREACHABLE();
}
bool visitFunction([[maybe_unused]] wasm::Function *curr) {
SideEffect visitFunction([[maybe_unused]] wasm::Function *curr) {
WASM_UNREACHABLE();
}
bool visitTable([[maybe_unused]] wasm::Table *curr) {
SideEffect visitTable([[maybe_unused]] wasm::Table *curr) {
WASM_UNREACHABLE();
}
bool visitMemory([[maybe_unused]] wasm::Memory *curr) {
SideEffect visitMemory([[maybe_unused]] wasm::Memory *curr) {
WASM_UNREACHABLE();
}
bool visitModule([[maybe_unused]] wasm::Module *curr) {
SideEffect visitModule([[maybe_unused]] wasm::Module *curr) {
WASM_UNREACHABLE();
}
......
src/kyut/side_effect.hpp 0 → 100644
View file @ 13636cc1
#ifndef INCLUDE_kyut_side_effect_hpp
#define INCLUDE_kyut_side_effect_hpp
#include <cstdint>
namespace kyut {
enum class SideEffect : std::int32_t {
none = 0,
read = 1,
write = 2,
};
} // namespace kyut
#endif // INCLUDE_kyut_side_effect_hpp
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