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|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* Copyright 2015 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "wasm/WasmBinaryToText.h"
#include "jsnum.h"
#include "jsprf.h"
#include "vm/ArrayBufferObject.h"
#include "vm/StringBuffer.h"
#include "wasm/WasmAST.h"
#include "wasm/WasmBinaryToAST.h"
#include "wasm/WasmTextUtils.h"
#include "wasm/WasmTypes.h"
using namespace js;
using namespace js::wasm;
using mozilla::IsInfinite;
using mozilla::IsNaN;
using mozilla::IsNegativeZero;
struct WasmRenderContext
{
JSContext* cx;
AstModule* module;
WasmPrintBuffer& buffer;
GeneratedSourceMap* maybeSourceMap;
uint32_t indent;
uint32_t currentFuncIndex;
WasmRenderContext(JSContext* cx, AstModule* module, WasmPrintBuffer& buffer, GeneratedSourceMap* sourceMap)
: cx(cx), module(module), buffer(buffer), maybeSourceMap(sourceMap), indent(0), currentFuncIndex(0)
{}
StringBuffer& sb() { return buffer.stringBuffer(); }
};
/*****************************************************************************/
// utilities
// Return true on purpose, so that we have a useful error message to provide to
// the user.
static bool
Fail(WasmRenderContext& c, const char* msg)
{
c.buffer.stringBuffer().clear();
return c.buffer.append("There was a problem when rendering the wasm text format: ") &&
c.buffer.append(msg, strlen(msg)) &&
c.buffer.append("\nYou should consider file a bug on Bugzilla in the "
"Core:::JavaScript Engine::JIT component at "
"https://bugzilla.mozilla.org/enter_bug.cgi.");
}
static bool
RenderIndent(WasmRenderContext& c)
{
for (uint32_t i = 0; i < c.indent; i++) {
if (!c.buffer.append(" "))
return false;
}
return true;
}
static bool
RenderInt32(WasmRenderContext& c, int32_t num)
{
return NumberValueToStringBuffer(c.cx, Int32Value(num), c.sb());
}
static bool
RenderInt64(WasmRenderContext& c, int64_t num)
{
if (num < 0 && !c.buffer.append("-"))
return false;
if (!num)
return c.buffer.append("0");
return RenderInBase<10>(c.sb(), mozilla::Abs(num));
}
static bool
RenderDouble(WasmRenderContext& c, RawF64 num)
{
double d = num.fp();
if (IsNaN(d))
return RenderNaN(c.sb(), num);
if (IsNegativeZero(d))
return c.buffer.append("-0");
if (IsInfinite(d)) {
if (d > 0)
return c.buffer.append("infinity");
return c.buffer.append("-infinity");
}
return NumberValueToStringBuffer(c.cx, DoubleValue(d), c.sb());
}
static bool
RenderFloat32(WasmRenderContext& c, RawF32 num)
{
float f = num.fp();
if (IsNaN(f))
return RenderNaN(c.sb(), num);
return RenderDouble(c, RawF64(double(f)));
}
static bool
RenderEscapedString(WasmRenderContext& c, const AstName& s)
{
size_t length = s.length();
const char16_t* p = s.begin();
for (size_t i = 0; i < length; i++) {
char16_t byte = p[i];
switch (byte) {
case '\n':
if (!c.buffer.append("\\n"))
return false;
break;
case '\r':
if (!c.buffer.append("\\0d"))
return false;
break;
case '\t':
if (!c.buffer.append("\\t"))
return false;
break;
case '\f':
if (!c.buffer.append("\\0c"))
return false;
break;
case '\b':
if (!c.buffer.append("\\08"))
return false;
break;
case '\\':
if (!c.buffer.append("\\\\"))
return false;
break;
case '"' :
if (!c.buffer.append("\\\""))
return false;
break;
case '\'':
if (!c.buffer.append("\\'"))
return false;
break;
default:
if (byte >= 32 && byte < 127) {
if (!c.buffer.append((char)byte))
return false;
} else {
char digit1 = byte / 16, digit2 = byte % 16;
if (!c.buffer.append("\\"))
return false;
if (!c.buffer.append((char)(digit1 < 10 ? digit1 + '0' : digit1 + 'a' - 10)))
return false;
if (!c.buffer.append((char)(digit2 < 10 ? digit2 + '0' : digit2 + 'a' - 10)))
return false;
}
break;
}
}
return true;
}
static bool
RenderExprType(WasmRenderContext& c, ExprType type)
{
switch (type) {
case ExprType::Void: return true; // ignoring void
case ExprType::I32: return c.buffer.append("i32");
case ExprType::I64: return c.buffer.append("i64");
case ExprType::F32: return c.buffer.append("f32");
case ExprType::F64: return c.buffer.append("f64");
default:;
}
MOZ_CRASH("bad type");
}
static bool
RenderValType(WasmRenderContext& c, ValType type)
{
return RenderExprType(c, ToExprType(type));
}
static bool
RenderName(WasmRenderContext& c, const AstName& name)
{
return c.buffer.append(name.begin(), name.end());
}
static bool
RenderRef(WasmRenderContext& c, const AstRef& ref)
{
if (ref.name().empty())
return RenderInt32(c, ref.index());
return RenderName(c, ref.name());
}
static bool
RenderBlockNameAndSignature(WasmRenderContext& c, const AstName& name, ExprType type)
{
if (!name.empty()) {
if (!c.buffer.append(' '))
return false;
if (!RenderName(c, name))
return false;
}
if (!IsVoid(type)) {
if (!c.buffer.append(' '))
return false;
if (!RenderExprType(c, type))
return false;
}
return true;
}
static bool
RenderExpr(WasmRenderContext& c, AstExpr& expr, bool newLine = true);
#define MAP_AST_EXPR(c, expr) \
if (c.maybeSourceMap) { \
uint32_t lineno = c.buffer.lineno(); \
uint32_t column = c.buffer.column(); \
if (!c.maybeSourceMap->exprlocs().emplaceBack(lineno, column, expr.offset())) \
return false; \
}
/*****************************************************************************/
// binary format parsing and rendering
static bool
RenderNop(WasmRenderContext& c, AstNop& nop)
{
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, nop);
return c.buffer.append("nop");
}
static bool
RenderDrop(WasmRenderContext& c, AstDrop& drop)
{
if (!RenderExpr(c, drop.value()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, drop);
return c.buffer.append("drop");
}
static bool
RenderUnreachable(WasmRenderContext& c, AstUnreachable& unreachable)
{
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, unreachable);
return c.buffer.append("unreachable");
}
static bool
RenderCallArgs(WasmRenderContext& c, const AstExprVector& args)
{
for (uint32_t i = 0; i < args.length(); i++) {
if (!RenderExpr(c, *args[i]))
return false;
}
return true;
}
static bool
RenderCall(WasmRenderContext& c, AstCall& call)
{
if (!RenderCallArgs(c, call.args()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, call);
if (call.op() == Op::Call) {
if (!c.buffer.append("call "))
return false;
} else {
return Fail(c, "unexpected operator");
}
return RenderRef(c, call.func());
}
static bool
RenderCallIndirect(WasmRenderContext& c, AstCallIndirect& call)
{
if (!RenderCallArgs(c, call.args()))
return false;
if (!RenderExpr(c, *call.index()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, call);
if (!c.buffer.append("call_indirect "))
return false;
return RenderRef(c, call.sig());
}
static bool
RenderConst(WasmRenderContext& c, AstConst& cst)
{
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, cst);
if (!RenderValType(c, cst.val().type()))
return false;
if (!c.buffer.append(".const "))
return false;
switch (ToExprType(cst.val().type())) {
case ExprType::I32:
return RenderInt32(c, (int32_t)cst.val().i32());
case ExprType::I64:
return RenderInt64(c, (int64_t)cst.val().i64());
case ExprType::F32:
return RenderFloat32(c, cst.val().f32());
case ExprType::F64:
return RenderDouble(c, cst.val().f64());
default:
break;
}
return false;
}
static bool
RenderGetLocal(WasmRenderContext& c, AstGetLocal& gl)
{
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, gl);
if (!c.buffer.append("get_local "))
return false;
return RenderRef(c, gl.local());
}
static bool
RenderSetLocal(WasmRenderContext& c, AstSetLocal& sl)
{
if (!RenderExpr(c, sl.value()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, sl);
if (!c.buffer.append("set_local "))
return false;
return RenderRef(c, sl.local());
}
static bool
RenderTeeLocal(WasmRenderContext& c, AstTeeLocal& tl)
{
if (!RenderExpr(c, tl.value()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, tl);
if (!c.buffer.append("tee_local "))
return false;
return RenderRef(c, tl.local());
}
static bool
RenderGetGlobal(WasmRenderContext& c, AstGetGlobal& gg)
{
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, gg);
if (!c.buffer.append("get_global "))
return false;
return RenderRef(c, gg.global());
}
static bool
RenderSetGlobal(WasmRenderContext& c, AstSetGlobal& sg)
{
if (!RenderExpr(c, sg.value()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, sg);
if (!c.buffer.append("set_global "))
return false;
return RenderRef(c, sg.global());
}
static bool
RenderExprList(WasmRenderContext& c, const AstExprVector& exprs)
{
for (uint32_t i = 0; i < exprs.length(); i++) {
if (!RenderExpr(c, *exprs[i]))
return false;
}
return true;
}
static bool
RenderBlock(WasmRenderContext& c, AstBlock& block)
{
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, block);
if (block.op() == Op::Block) {
if (!c.buffer.append("block"))
return false;
} else if (block.op() == Op::Loop) {
if (!c.buffer.append("loop"))
return false;
} else {
return Fail(c, "unexpected block kind");
}
if (!RenderBlockNameAndSignature(c, block.name(), block.type()))
return false;
if (!c.buffer.append('\n'))
return false;
c.indent++;
if (!RenderExprList(c, block.exprs()))
return false;
c.indent--;
if (!RenderIndent(c))
return false;
return c.buffer.append("end");
}
static bool
RenderFirst(WasmRenderContext& c, AstFirst& first)
{
return RenderExprList(c, first.exprs());
}
static bool
RenderCurrentMemory(WasmRenderContext& c, AstCurrentMemory& cm)
{
if (!RenderIndent(c))
return false;
return c.buffer.append("current_memory\n");
}
static bool
RenderGrowMemory(WasmRenderContext& c, AstGrowMemory& gm)
{
if (!RenderExpr(c, *gm.operand()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, gm);
return c.buffer.append("grow_memory\n");
}
static bool
RenderUnaryOperator(WasmRenderContext& c, AstUnaryOperator& unary)
{
if (!RenderExpr(c, *unary.operand()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, unary);
const char* opStr;
switch (unary.op()) {
case Op::I32Eqz: opStr = "i32.eqz"; break;
case Op::I32Clz: opStr = "i32.clz"; break;
case Op::I32Ctz: opStr = "i32.ctz"; break;
case Op::I32Popcnt: opStr = "i32.popcnt"; break;
case Op::I64Clz: opStr = "i64.clz"; break;
case Op::I64Ctz: opStr = "i64.ctz"; break;
case Op::I64Popcnt: opStr = "i64.popcnt"; break;
case Op::F32Abs: opStr = "f32.abs"; break;
case Op::F32Neg: opStr = "f32.neg"; break;
case Op::F32Ceil: opStr = "f32.ceil"; break;
case Op::F32Floor: opStr = "f32.floor"; break;
case Op::F32Sqrt: opStr = "f32.sqrt"; break;
case Op::F32Trunc: opStr = "f32.trunc"; break;
case Op::F32Nearest: opStr = "f32.nearest"; break;
case Op::F64Abs: opStr = "f64.abs"; break;
case Op::F64Neg: opStr = "f64.neg"; break;
case Op::F64Ceil: opStr = "f64.ceil"; break;
case Op::F64Floor: opStr = "f64.floor"; break;
case Op::F64Nearest: opStr = "f64.nearest"; break;
case Op::F64Sqrt: opStr = "f64.sqrt"; break;
case Op::F64Trunc: opStr = "f64.trunc"; break;
default: return Fail(c, "unexpected unary operator");
}
return c.buffer.append(opStr, strlen(opStr));
}
static bool
RenderBinaryOperator(WasmRenderContext& c, AstBinaryOperator& binary)
{
if (!RenderExpr(c, *binary.lhs()))
return false;
if (!RenderExpr(c, *binary.rhs()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, binary);
const char* opStr;
switch (binary.op()) {
case Op::I32Add: opStr = "i32.add"; break;
case Op::I32Sub: opStr = "i32.sub"; break;
case Op::I32Mul: opStr = "i32.mul"; break;
case Op::I32DivS: opStr = "i32.div_s"; break;
case Op::I32DivU: opStr = "i32.div_u"; break;
case Op::I32RemS: opStr = "i32.rem_s"; break;
case Op::I32RemU: opStr = "i32.rem_u"; break;
case Op::I32And: opStr = "i32.and"; break;
case Op::I32Or: opStr = "i32.or"; break;
case Op::I32Xor: opStr = "i32.xor"; break;
case Op::I32Shl: opStr = "i32.shl"; break;
case Op::I32ShrS: opStr = "i32.shr_s"; break;
case Op::I32ShrU: opStr = "i32.shr_u"; break;
case Op::I32Rotl: opStr = "i32.rotl"; break;
case Op::I32Rotr: opStr = "i32.rotr"; break;
case Op::I64Add: opStr = "i64.add"; break;
case Op::I64Sub: opStr = "i64.sub"; break;
case Op::I64Mul: opStr = "i64.mul"; break;
case Op::I64DivS: opStr = "i64.div_s"; break;
case Op::I64DivU: opStr = "i64.div_u"; break;
case Op::I64RemS: opStr = "i64.rem_s"; break;
case Op::I64RemU: opStr = "i64.rem_u"; break;
case Op::I64And: opStr = "i64.and"; break;
case Op::I64Or: opStr = "i64.or"; break;
case Op::I64Xor: opStr = "i64.xor"; break;
case Op::I64Shl: opStr = "i64.shl"; break;
case Op::I64ShrS: opStr = "i64.shr_s"; break;
case Op::I64ShrU: opStr = "i64.shr_u"; break;
case Op::I64Rotl: opStr = "i64.rotl"; break;
case Op::I64Rotr: opStr = "i64.rotr"; break;
case Op::F32Add: opStr = "f32.add"; break;
case Op::F32Sub: opStr = "f32.sub"; break;
case Op::F32Mul: opStr = "f32.mul"; break;
case Op::F32Div: opStr = "f32.div"; break;
case Op::F32Min: opStr = "f32.min"; break;
case Op::F32Max: opStr = "f32.max"; break;
case Op::F32CopySign: opStr = "f32.copysign"; break;
case Op::F64Add: opStr = "f64.add"; break;
case Op::F64Sub: opStr = "f64.sub"; break;
case Op::F64Mul: opStr = "f64.mul"; break;
case Op::F64Div: opStr = "f64.div"; break;
case Op::F64Min: opStr = "f64.min"; break;
case Op::F64Max: opStr = "f64.max"; break;
case Op::F64CopySign: opStr = "f64.copysign"; break;
default: return Fail(c, "unexpected binary operator");
}
return c.buffer.append(opStr, strlen(opStr));
}
static bool
RenderTernaryOperator(WasmRenderContext& c, AstTernaryOperator& ternary)
{
if (!RenderExpr(c, *ternary.op0()))
return false;
if (!RenderExpr(c, *ternary.op1()))
return false;
if (!RenderExpr(c, *ternary.op2()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, ternary);
const char* opStr;
switch (ternary.op()) {
case Op::Select: opStr = "select"; break;
default: return Fail(c, "unexpected ternary operator");
}
return c.buffer.append(opStr, strlen(opStr));
}
static bool
RenderComparisonOperator(WasmRenderContext& c, AstComparisonOperator& comp)
{
if (!RenderExpr(c, *comp.lhs()))
return false;
if (!RenderExpr(c, *comp.rhs()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, comp);
const char* opStr;
switch (comp.op()) {
case Op::I32Eq: opStr = "i32.eq"; break;
case Op::I32Ne: opStr = "i32.ne"; break;
case Op::I32LtS: opStr = "i32.lt_s"; break;
case Op::I32LtU: opStr = "i32.lt_u"; break;
case Op::I32LeS: opStr = "i32.le_s"; break;
case Op::I32LeU: opStr = "i32.le_u"; break;
case Op::I32GtS: opStr = "i32.gt_s"; break;
case Op::I32GtU: opStr = "i32.gt_u"; break;
case Op::I32GeS: opStr = "i32.ge_s"; break;
case Op::I32GeU: opStr = "i32.ge_u"; break;
case Op::I64Eq: opStr = "i64.eq"; break;
case Op::I64Ne: opStr = "i64.ne"; break;
case Op::I64LtS: opStr = "i64.lt_s"; break;
case Op::I64LtU: opStr = "i64.lt_u"; break;
case Op::I64LeS: opStr = "i64.le_s"; break;
case Op::I64LeU: opStr = "i64.le_u"; break;
case Op::I64GtS: opStr = "i64.gt_s"; break;
case Op::I64GtU: opStr = "i64.gt_u"; break;
case Op::I64GeS: opStr = "i64.ge_s"; break;
case Op::I64GeU: opStr = "i64.ge_u"; break;
case Op::F32Eq: opStr = "f32.eq"; break;
case Op::F32Ne: opStr = "f32.ne"; break;
case Op::F32Lt: opStr = "f32.lt"; break;
case Op::F32Le: opStr = "f32.le"; break;
case Op::F32Gt: opStr = "f32.gt"; break;
case Op::F32Ge: opStr = "f32.ge"; break;
case Op::F64Eq: opStr = "f64.eq"; break;
case Op::F64Ne: opStr = "f64.ne"; break;
case Op::F64Lt: opStr = "f64.lt"; break;
case Op::F64Le: opStr = "f64.le"; break;
case Op::F64Gt: opStr = "f64.gt"; break;
case Op::F64Ge: opStr = "f64.ge"; break;
default: return Fail(c, "unexpected comparison operator");
}
return c.buffer.append(opStr, strlen(opStr));
}
static bool
RenderConversionOperator(WasmRenderContext& c, AstConversionOperator& conv)
{
if (!RenderExpr(c, *conv.operand()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, conv);
const char* opStr;
switch (conv.op()) {
case Op::I32WrapI64: opStr = "i32.wrap/i64"; break;
case Op::I32TruncSF32: opStr = "i32.trunc_s/f32"; break;
case Op::I32TruncUF32: opStr = "i32.trunc_u/f32"; break;
case Op::I32ReinterpretF32: opStr = "i32.reinterpret/f32"; break;
case Op::I32TruncSF64: opStr = "i32.trunc_s/f64"; break;
case Op::I32TruncUF64: opStr = "i32.trunc_u/f64"; break;
case Op::I64ExtendSI32: opStr = "i64.extend_s/i32"; break;
case Op::I64ExtendUI32: opStr = "i64.extend_u/i32"; break;
case Op::I64TruncSF32: opStr = "i64.trunc_s/f32"; break;
case Op::I64TruncUF32: opStr = "i64.trunc_u/f32"; break;
case Op::I64TruncSF64: opStr = "i64.trunc_s/f64"; break;
case Op::I64TruncUF64: opStr = "i64.trunc_u/f64"; break;
case Op::I64ReinterpretF64: opStr = "i64.reinterpret/f64"; break;
case Op::F32ConvertSI32: opStr = "f32.convert_s/i32"; break;
case Op::F32ConvertUI32: opStr = "f32.convert_u/i32"; break;
case Op::F32ReinterpretI32: opStr = "f32.reinterpret/i32"; break;
case Op::F32ConvertSI64: opStr = "f32.convert_s/i64"; break;
case Op::F32ConvertUI64: opStr = "f32.convert_u/i64"; break;
case Op::F32DemoteF64: opStr = "f32.demote/f64"; break;
case Op::F64ConvertSI32: opStr = "f64.convert_s/i32"; break;
case Op::F64ConvertUI32: opStr = "f64.convert_u/i32"; break;
case Op::F64ConvertSI64: opStr = "f64.convert_s/i64"; break;
case Op::F64ConvertUI64: opStr = "f64.convert_u/i64"; break;
case Op::F64ReinterpretI64: opStr = "f64.reinterpret/i64"; break;
case Op::F64PromoteF32: opStr = "f64.promote/f32"; break;
case Op::I32Eqz: opStr = "i32.eqz"; break;
case Op::I64Eqz: opStr = "i64.eqz"; break;
default: return Fail(c, "unexpected conversion operator");
}
return c.buffer.append(opStr, strlen(opStr));
}
static bool
RenderIf(WasmRenderContext& c, AstIf& if_)
{
if (!RenderExpr(c, if_.cond()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, if_);
if (!c.buffer.append("if"))
return false;
if (!RenderBlockNameAndSignature(c, if_.name(), if_.type()))
return false;
if (!c.buffer.append('\n'))
return false;
c.indent++;
if (!RenderExprList(c, if_.thenExprs()))
return false;
c.indent--;
if (if_.hasElse()) {
if (!RenderIndent(c))
return false;
if (!c.buffer.append("else\n"))
return false;
c.indent++;
if (!RenderExprList(c, if_.elseExprs()))
return false;
c.indent--;
}
if (!RenderIndent(c))
return false;
return c.buffer.append("end");
}
static bool
RenderLoadStoreBase(WasmRenderContext& c, const AstLoadStoreAddress& lsa)
{
return RenderExpr(c, lsa.base());
}
static bool
RenderLoadStoreAddress(WasmRenderContext& c, const AstLoadStoreAddress& lsa, uint32_t defaultAlignLog2)
{
if (lsa.offset() != 0) {
if (!c.buffer.append(" offset="))
return false;
if (!RenderInt32(c, lsa.offset()))
return false;
}
uint32_t alignLog2 = lsa.flags();
if (defaultAlignLog2 != alignLog2) {
if (!c.buffer.append(" align="))
return false;
if (!RenderInt32(c, 1 << alignLog2))
return false;
}
return true;
}
static bool
RenderLoad(WasmRenderContext& c, AstLoad& load)
{
if (!RenderLoadStoreBase(c, load.address()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, load);
uint32_t defaultAlignLog2;
switch (load.op()) {
case Op::I32Load8S:
if (!c.buffer.append("i32.load8_s"))
return false;
defaultAlignLog2 = 0;
break;
case Op::I64Load8S:
if (!c.buffer.append("i64.load8_s"))
return false;
defaultAlignLog2 = 0;
break;
case Op::I32Load8U:
if (!c.buffer.append("i32.load8_u"))
return false;
defaultAlignLog2 = 0;
break;
case Op::I64Load8U:
if (!c.buffer.append("i64.load8_u"))
return false;
defaultAlignLog2 = 0;
break;
case Op::I32Load16S:
if (!c.buffer.append("i32.load16_s"))
return false;
defaultAlignLog2 = 1;
break;
case Op::I64Load16S:
if (!c.buffer.append("i64.load16_s"))
return false;
defaultAlignLog2 = 1;
break;
case Op::I32Load16U:
if (!c.buffer.append("i32.load16_u"))
return false;
defaultAlignLog2 = 1;
break;
case Op::I64Load16U:
if (!c.buffer.append("i64.load16_u"))
return false;
defaultAlignLog2 = 1;
break;
case Op::I64Load32S:
if (!c.buffer.append("i64.load32_s"))
return false;
defaultAlignLog2 = 2;
break;
case Op::I64Load32U:
if (!c.buffer.append("i64.load32_u"))
return false;
defaultAlignLog2 = 2;
break;
case Op::I32Load:
if (!c.buffer.append("i32.load"))
return false;
defaultAlignLog2 = 2;
break;
case Op::I64Load:
if (!c.buffer.append("i64.load"))
return false;
defaultAlignLog2 = 3;
break;
case Op::F32Load:
if (!c.buffer.append("f32.load"))
return false;
defaultAlignLog2 = 2;
break;
case Op::F64Load:
if (!c.buffer.append("f64.load"))
return false;
defaultAlignLog2 = 3;
break;
default:
return Fail(c, "unexpected load operator");
}
return RenderLoadStoreAddress(c, load.address(), defaultAlignLog2);
}
static bool
RenderStore(WasmRenderContext& c, AstStore& store)
{
if (!RenderLoadStoreBase(c, store.address()))
return false;
if (!RenderExpr(c, store.value()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, store);
uint32_t defaultAlignLog2;
switch (store.op()) {
case Op::I32Store8:
if (!c.buffer.append("i32.store8"))
return false;
defaultAlignLog2 = 0;
break;
case Op::I64Store8:
if (!c.buffer.append("i64.store8"))
return false;
defaultAlignLog2 = 0;
break;
case Op::I32Store16:
if (!c.buffer.append("i32.store16"))
return false;
defaultAlignLog2 = 1;
break;
case Op::I64Store16:
if (!c.buffer.append("i64.store16"))
return false;
defaultAlignLog2 = 1;
break;
case Op::I64Store32:
if (!c.buffer.append("i64.store32"))
return false;
defaultAlignLog2 = 2;
break;
case Op::I32Store:
if (!c.buffer.append("i32.store"))
return false;
defaultAlignLog2 = 2;
break;
case Op::I64Store:
if (!c.buffer.append("i64.store"))
return false;
defaultAlignLog2 = 3;
break;
case Op::F32Store:
if (!c.buffer.append("f32.store"))
return false;
defaultAlignLog2 = 2;
break;
case Op::F64Store:
if (!c.buffer.append("f64.store"))
return false;
defaultAlignLog2 = 3;
break;
default:
return Fail(c, "unexpected store operator");
}
return RenderLoadStoreAddress(c, store.address(), defaultAlignLog2);
}
static bool
RenderBranch(WasmRenderContext& c, AstBranch& branch)
{
Op op = branch.op();
MOZ_ASSERT(op == Op::BrIf || op == Op::Br);
if (op == Op::BrIf) {
if (!RenderExpr(c, branch.cond()))
return false;
}
if (branch.maybeValue()) {
if (!RenderExpr(c, *(branch.maybeValue())))
return false;
}
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, branch);
if (op == Op::BrIf ? !c.buffer.append("br_if ") : !c.buffer.append("br "))
return false;
return RenderRef(c, branch.target());
}
static bool
RenderBrTable(WasmRenderContext& c, AstBranchTable& table)
{
if (table.maybeValue()) {
if (!RenderExpr(c, *(table.maybeValue())))
return false;
}
// Index
if (!RenderExpr(c, table.index()))
return false;
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, table);
if (!c.buffer.append("br_table "))
return false;
uint32_t tableLength = table.table().length();
for (uint32_t i = 0; i < tableLength; i++) {
if (!RenderRef(c, table.table()[i]))
return false;
if (!c.buffer.append(" "))
return false;
}
return RenderRef(c, table.def());
}
static bool
RenderReturn(WasmRenderContext& c, AstReturn& ret)
{
if (ret.maybeExpr()) {
if (!RenderExpr(c, *(ret.maybeExpr())))
return false;
}
if (!RenderIndent(c))
return false;
MAP_AST_EXPR(c, ret);
return c.buffer.append("return");
}
static bool
RenderExpr(WasmRenderContext& c, AstExpr& expr, bool newLine /* = true */)
{
switch (expr.kind()) {
case AstExprKind::Drop:
if (!RenderDrop(c, expr.as<AstDrop>()))
return false;
break;
case AstExprKind::Nop:
if (!RenderNop(c, expr.as<AstNop>()))
return false;
break;
case AstExprKind::Unreachable:
if (!RenderUnreachable(c, expr.as<AstUnreachable>()))
return false;
break;
case AstExprKind::Call:
if (!RenderCall(c, expr.as<AstCall>()))
return false;
break;
case AstExprKind::CallIndirect:
if (!RenderCallIndirect(c, expr.as<AstCallIndirect>()))
return false;
break;
case AstExprKind::Const:
if (!RenderConst(c, expr.as<AstConst>()))
return false;
break;
case AstExprKind::GetLocal:
if (!RenderGetLocal(c, expr.as<AstGetLocal>()))
return false;
break;
case AstExprKind::SetLocal:
if (!RenderSetLocal(c, expr.as<AstSetLocal>()))
return false;
break;
case AstExprKind::GetGlobal:
if (!RenderGetGlobal(c, expr.as<AstGetGlobal>()))
return false;
break;
case AstExprKind::SetGlobal:
if (!RenderSetGlobal(c, expr.as<AstSetGlobal>()))
return false;
break;
case AstExprKind::TeeLocal:
if (!RenderTeeLocal(c, expr.as<AstTeeLocal>()))
return false;
break;
case AstExprKind::Block:
if (!RenderBlock(c, expr.as<AstBlock>()))
return false;
break;
case AstExprKind::If:
if (!RenderIf(c, expr.as<AstIf>()))
return false;
break;
case AstExprKind::UnaryOperator:
if (!RenderUnaryOperator(c, expr.as<AstUnaryOperator>()))
return false;
break;
case AstExprKind::BinaryOperator:
if (!RenderBinaryOperator(c, expr.as<AstBinaryOperator>()))
return false;
break;
case AstExprKind::TernaryOperator:
if (!RenderTernaryOperator(c, expr.as<AstTernaryOperator>()))
return false;
break;
case AstExprKind::ComparisonOperator:
if (!RenderComparisonOperator(c, expr.as<AstComparisonOperator>()))
return false;
break;
case AstExprKind::ConversionOperator:
if (!RenderConversionOperator(c, expr.as<AstConversionOperator>()))
return false;
break;
case AstExprKind::Load:
if (!RenderLoad(c, expr.as<AstLoad>()))
return false;
break;
case AstExprKind::Store:
if (!RenderStore(c, expr.as<AstStore>()))
return false;
break;
case AstExprKind::Branch:
if (!RenderBranch(c, expr.as<AstBranch>()))
return false;
break;
case AstExprKind::BranchTable:
if (!RenderBrTable(c, expr.as<AstBranchTable>()))
return false;
break;
case AstExprKind::Return:
if (!RenderReturn(c, expr.as<AstReturn>()))
return false;
break;
case AstExprKind::First:
newLine = false;
if (!RenderFirst(c, expr.as<AstFirst>()))
return false;
break;
case AstExprKind::CurrentMemory:
if (!RenderCurrentMemory(c, expr.as<AstCurrentMemory>()))
return false;
break;
case AstExprKind::GrowMemory:
if (!RenderGrowMemory(c, expr.as<AstGrowMemory>()))
return false;
break;
default:
MOZ_CRASH("Bad AstExprKind");
}
return !newLine || c.buffer.append("\n");
}
static bool
RenderSignature(WasmRenderContext& c, const AstSig& sig, const AstNameVector* maybeLocals = nullptr)
{
uint32_t paramsNum = sig.args().length();
if (maybeLocals) {
for (uint32_t i = 0; i < paramsNum; i++) {
if (!c.buffer.append(" (param "))
return false;
const AstName& name = (*maybeLocals)[i];
if (!name.empty()) {
if (!RenderName(c, name))
return false;
if (!c.buffer.append(" "))
return false;
}
ValType arg = sig.args()[i];
if (!RenderValType(c, arg))
return false;
if (!c.buffer.append(")"))
return false;
}
} else if (paramsNum > 0) {
if (!c.buffer.append(" (param"))
return false;
for (uint32_t i = 0; i < paramsNum; i++) {
if (!c.buffer.append(" "))
return false;
ValType arg = sig.args()[i];
if (!RenderValType(c, arg))
return false;
}
if (!c.buffer.append(")"))
return false;
}
if (sig.ret() != ExprType::Void) {
if (!c.buffer.append(" (result "))
return false;
if (!RenderExprType(c, sig.ret()))
return false;
if (!c.buffer.append(")"))
return false;
}
return true;
}
static bool
RenderTypeSection(WasmRenderContext& c, const AstModule::SigVector& sigs)
{
uint32_t numSigs = sigs.length();
if (!numSigs)
return true;
for (uint32_t sigIndex = 0; sigIndex < numSigs; sigIndex++) {
const AstSig* sig = sigs[sigIndex];
if (!RenderIndent(c))
return false;
if (!c.buffer.append("(type"))
return false;
if (!sig->name().empty()) {
if (!c.buffer.append(" "))
return false;
if (!RenderName(c, sig->name()))
return false;
}
if (!c.buffer.append(" (func"))
return false;
if (!RenderSignature(c, *sig))
return false;
if (!c.buffer.append("))\n"))
return false;
}
return true;
}
static bool
RenderLimits(WasmRenderContext& c, const Limits& limits)
{
if (!RenderInt32(c, limits.initial))
return false;
if (limits.maximum) {
if (!c.buffer.append(" "))
return false;
if (!RenderInt32(c, *limits.maximum))
return false;
}
return true;
}
static bool
RenderResizableTable(WasmRenderContext& c, const Limits& table)
{
if (!c.buffer.append("(table "))
return false;
if (!RenderLimits(c, table))
return false;
return c.buffer.append(" anyfunc)");
}
static bool
RenderTableSection(WasmRenderContext& c, const AstModule& module)
{
if (!module.hasTable())
return true;
for (const AstResizable& table : module.tables()) {
if (table.imported)
continue;
if (!RenderIndent(c))
return false;
if (!RenderResizableTable(c, table.limits))
return false;
if (!c.buffer.append("\n"))
return false;
}
return true;
}
static bool
RenderInlineExpr(WasmRenderContext& c, AstExpr& expr)
{
if (!c.buffer.append("("))
return false;
uint32_t prevIndent = c.indent;
c.indent = 0;
if (!RenderExpr(c, expr, /* newLine */ false))
return false;
c.indent = prevIndent;
return c.buffer.append(")");
}
static bool
RenderElemSection(WasmRenderContext& c, const AstModule& module)
{
for (const AstElemSegment* segment : module.elemSegments()) {
if (!RenderIndent(c))
return false;
if (!c.buffer.append("(elem "))
return false;
if (!RenderInlineExpr(c, *segment->offset()))
return false;
for (const AstRef& elem : segment->elems()) {
if (!c.buffer.append(" "))
return false;
uint32_t index = elem.index();
AstName name = index < module.funcImportNames().length()
? module.funcImportNames()[index]
: module.funcs()[index - module.funcImportNames().length()]->name();
if (name.empty()) {
if (!RenderInt32(c, index))
return false;
} else {
if (!RenderName(c, name))
return false;
}
}
if (!c.buffer.append(")\n"))
return false;
}
return true;
}
static bool
RenderGlobal(WasmRenderContext& c, const AstGlobal& glob, bool inImport = false)
{
if (!c.buffer.append("(global "))
return false;
if (!inImport) {
if (!RenderName(c, glob.name()))
return false;
if (!c.buffer.append(" "))
return false;
}
if (glob.isMutable()) {
if (!c.buffer.append("(mut "))
return false;
if (!RenderValType(c, glob.type()))
return false;
if (!c.buffer.append(")"))
return false;
} else {
if (!RenderValType(c, glob.type()))
return false;
}
if (glob.hasInit()) {
if (!c.buffer.append(" "))
return false;
if (!RenderInlineExpr(c, glob.init()))
return false;
}
if (!c.buffer.append(")"))
return false;
return inImport || c.buffer.append("\n");
}
static bool
RenderGlobalSection(WasmRenderContext& c, const AstModule& module)
{
if (module.globals().empty())
return true;
for (const AstGlobal* global : module.globals()) {
if (!RenderIndent(c))
return false;
if (!RenderGlobal(c, *global))
return false;
}
return true;
}
static bool
RenderResizableMemory(WasmRenderContext& c, Limits memory)
{
if (!c.buffer.append("(memory "))
return false;
MOZ_ASSERT(memory.initial % PageSize == 0);
memory.initial /= PageSize;
if (memory.maximum) {
MOZ_ASSERT(*memory.maximum % PageSize == 0);
*memory.maximum /= PageSize;
}
if (!RenderLimits(c, memory))
return false;
return c.buffer.append(")");
}
static bool
RenderImport(WasmRenderContext& c, AstImport& import, const AstModule& module)
{
if (!RenderIndent(c))
return false;
if (!c.buffer.append("(import "))
return false;
if (!RenderName(c, import.name()))
return false;
if (!c.buffer.append(" \""))
return false;
const AstName& moduleName = import.module();
if (!RenderEscapedString(c, moduleName))
return false;
if (!c.buffer.append("\" \""))
return false;
const AstName& fieldName = import.field();
if (!RenderEscapedString(c, fieldName))
return false;
if (!c.buffer.append("\" "))
return false;
switch (import.kind()) {
case DefinitionKind::Function: {
const AstSig* sig = module.sigs()[import.funcSig().index()];
if (!RenderSignature(c, *sig))
return false;
break;
}
case DefinitionKind::Table: {
if (!RenderResizableTable(c, import.limits()))
return false;
break;
}
case DefinitionKind::Memory: {
if (!RenderResizableMemory(c, import.limits()))
return false;
break;
}
case DefinitionKind::Global: {
const AstGlobal& glob = import.global();
if (!RenderGlobal(c, glob, /* inImport */ true))
return false;
break;
}
}
return c.buffer.append(")\n");
}
static bool
RenderImportSection(WasmRenderContext& c, const AstModule& module)
{
for (AstImport* import : module.imports()) {
if (!RenderImport(c, *import, module))
return false;
}
return true;
}
static bool
RenderExport(WasmRenderContext& c, AstExport& export_,
const AstModule::NameVector& funcImportNames,
const AstModule::FuncVector& funcs)
{
if (!RenderIndent(c))
return false;
if (!c.buffer.append("(export \""))
return false;
if (!RenderEscapedString(c, export_.name()))
return false;
if (!c.buffer.append("\" "))
return false;
switch (export_.kind()) {
case DefinitionKind::Function: {
uint32_t index = export_.ref().index();
AstName name = index < funcImportNames.length()
? funcImportNames[index]
: funcs[index - funcImportNames.length()]->name();
if (name.empty()) {
if (!RenderInt32(c, index))
return false;
} else {
if (!RenderName(c, name))
return false;
}
break;
}
case DefinitionKind::Table: {
if (!c.buffer.append("table"))
return false;
break;
}
case DefinitionKind::Memory: {
if (!c.buffer.append("memory"))
return false;
break;
}
case DefinitionKind::Global: {
if (!c.buffer.append("global"))
return false;
if (!RenderRef(c, export_.ref()))
return false;
break;
}
}
return c.buffer.append(")\n");
}
static bool
RenderExportSection(WasmRenderContext& c, const AstModule::ExportVector& exports,
const AstModule::NameVector& funcImportNames,
const AstModule::FuncVector& funcs)
{
uint32_t numExports = exports.length();
for (uint32_t i = 0; i < numExports; i++) {
if (!RenderExport(c, *exports[i], funcImportNames, funcs))
return false;
}
return true;
}
static bool
RenderFunctionBody(WasmRenderContext& c, AstFunc& func, const AstModule::SigVector& sigs)
{
const AstSig* sig = sigs[func.sig().index()];
size_t startExprIndex = c.maybeSourceMap ? c.maybeSourceMap->exprlocs().length() : 0;
uint32_t startLineno = c.buffer.lineno();
uint32_t argsNum = sig->args().length();
uint32_t localsNum = func.vars().length();
if (localsNum > 0) {
if (!RenderIndent(c))
return false;
for (uint32_t i = 0; i < localsNum; i++) {
if (!c.buffer.append("(local "))
return false;
const AstName& name = func.locals()[argsNum + i];
if (!name.empty()) {
if (!RenderName(c, name))
return false;
if (!c.buffer.append(" "))
return false;
}
ValType local = func.vars()[i];
if (!RenderValType(c, local))
return false;
if (!c.buffer.append(") "))
return false;
}
if (!c.buffer.append("\n"))
return false;
}
uint32_t exprsNum = func.body().length();
for (uint32_t i = 0; i < exprsNum; i++) {
if (!RenderExpr(c, *func.body()[i]))
return false;
}
size_t endExprIndex = c.maybeSourceMap ? c.maybeSourceMap->exprlocs().length() : 0;
uint32_t endLineno = c.buffer.lineno();
if (c.maybeSourceMap) {
if (!c.maybeSourceMap->functionlocs().emplaceBack(startExprIndex, endExprIndex,
startLineno, endLineno))
return false;
}
return true;
}
static bool
RenderCodeSection(WasmRenderContext& c, const AstModule::FuncVector& funcs,
const AstModule::SigVector& sigs)
{
uint32_t numFuncBodies = funcs.length();
for (uint32_t funcIndex = 0; funcIndex < numFuncBodies; funcIndex++) {
AstFunc* func = funcs[funcIndex];
uint32_t sigIndex = func->sig().index();
AstSig* sig = sigs[sigIndex];
if (!RenderIndent(c))
return false;
if (!c.buffer.append("(func "))
return false;
if (!func->name().empty()) {
if (!RenderName(c, func->name()))
return false;
}
if (!RenderSignature(c, *sig, &(func->locals())))
return false;
if (!c.buffer.append("\n"))
return false;
c.currentFuncIndex = funcIndex;
c.indent++;
if (!RenderFunctionBody(c, *func, sigs))
return false;
c.indent--;
if (!RenderIndent(c))
return false;
if (!c.buffer.append(")\n"))
return false;
}
return true;
}
static bool
RenderMemorySection(WasmRenderContext& c, const AstModule& module)
{
if (!module.hasMemory())
return true;
for (const AstResizable& memory : module.memories()) {
if (memory.imported)
continue;
if (!RenderIndent(c))
return false;
if (!RenderResizableMemory(c, memory.limits))
return false;
if (!c.buffer.append("\n"))
return false;
}
return true;
}
static bool
RenderDataSection(WasmRenderContext& c, const AstModule& module)
{
uint32_t numSegments = module.dataSegments().length();
if (!numSegments)
return true;
for (const AstDataSegment* seg : module.dataSegments()) {
if (!RenderIndent(c))
return false;
if (!c.buffer.append("(data "))
return false;
if (!RenderInlineExpr(c, *seg->offset()))
return false;
if (!c.buffer.append("\n"))
return false;
c.indent++;
for (const AstName& fragment : seg->fragments()) {
if (!RenderIndent(c))
return false;
if (!c.buffer.append("\""))
return false;
if (!RenderEscapedString(c, fragment))
return false;
if (!c.buffer.append("\"\n"))
return false;
}
c.indent--;
if (!RenderIndent(c))
return false;
if (!c.buffer.append(")\n"))
return false;
}
return true;
}
static bool
RenderStartSection(WasmRenderContext& c, AstModule& module)
{
if (!module.hasStartFunc())
return true;
if (!RenderIndent(c))
return false;
if (!c.buffer.append("(start "))
return false;
if (!RenderRef(c, module.startFunc().func()))
return false;
if (!c.buffer.append(")\n"))
return false;
return true;
}
static bool
RenderModule(WasmRenderContext& c, AstModule& module)
{
if (!c.buffer.append("(module\n"))
return false;
c.indent++;
if (!RenderTypeSection(c, module.sigs()))
return false;
if (!RenderImportSection(c, module))
return false;
if (!RenderTableSection(c, module))
return false;
if (!RenderMemorySection(c, module))
return false;
if (!RenderGlobalSection(c, module))
return false;
if (!RenderExportSection(c, module.exports(), module.funcImportNames(), module.funcs()))
return false;
if (!RenderStartSection(c, module))
return false;
if (!RenderElemSection(c, module))
return false;
if (!RenderCodeSection(c, module.funcs(), module.sigs()))
return false;
if (!RenderDataSection(c, module))
return false;
c.indent--;
if (!c.buffer.append(")"))
return false;
return true;
}
#undef MAP_AST_EXPR
/*****************************************************************************/
// Top-level functions
bool
wasm::BinaryToText(JSContext* cx, const uint8_t* bytes, size_t length, StringBuffer& buffer, GeneratedSourceMap* sourceMap)
{
LifoAlloc lifo(AST_LIFO_DEFAULT_CHUNK_SIZE);
AstModule* module;
if (!BinaryToAst(cx, bytes, length, lifo, &module))
return false;
WasmPrintBuffer buf(buffer);
WasmRenderContext c(cx, module, buf, sourceMap);
if (!RenderModule(c, *module)) {
if (!cx->isExceptionPending())
ReportOutOfMemory(cx);
return false;
}
return true;
}
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