bool
ModuleGenerator::finishCodegen()
{
uint32_t offsetInWhole = masm_.size();
uint32_t numFuncExports = metadata_->funcExports.length();
MOZ_ASSERT(numFuncExports == exportedFuncs_.count());
// Generate stubs in a separate MacroAssembler since, otherwise, for modules
// larger than the JumpImmediateRange, even local uses of Label will fail
// due to the large absolute offsets temporarily stored by Label::bind().
OffsetVector entries;
ProfilingOffsetVector interpExits;
ProfilingOffsetVector jitExits;
EnumeratedArray<JumpTarget, JumpTarget::Limit, Offsets> jumpTargets;
Offsets interruptExit;
{
TempAllocator alloc(&lifo_);
MacroAssembler masm(MacroAssembler::AsmJSToken(), alloc);
if (!entries.resize(numFuncExports))
return false;
for (uint32_t i = 0; i < numFuncExports; i++)
entries[i] = GenerateEntry(masm, metadata_->funcExports[i]);
if (!interpExits.resize(numFuncImports()))
return false;
if (!jitExits.resize(numFuncImports()))
return false;
for (uint32_t i = 0; i < numFuncImports(); i++) {
interpExits[i] = GenerateInterpExit(masm, metadata_->funcImports[i], i);
jitExits[i] = GenerateJitExit(masm, metadata_->funcImports[i]);
}
for (JumpTarget target : MakeEnumeratedRange(JumpTarget::Limit))
jumpTargets[target] = GenerateJumpTarget(masm, target);
interruptExit = GenerateInterruptStub(masm);
if (masm.oom() || !masm_.asmMergeWith(masm))
return false;
}
// Adjust each of the resulting Offsets (to account for being merged into
// masm_) and then create code ranges for all the stubs.
for (uint32_t i = 0; i < numFuncExports; i++) {
entries[i].offsetBy(offsetInWhole);
metadata_->funcExports[i].initEntryOffset(entries[i].begin);
if (!metadata_->codeRanges.emplaceBack(CodeRange::Entry, entries[i]))
return false;
}
for (uint32_t i = 0; i < numFuncImports(); i++) {
interpExits[i].offsetBy(offsetInWhole);
metadata_->funcImports[i].initInterpExitOffset(interpExits[i].begin);
if (!metadata_->codeRanges.emplaceBack(CodeRange::ImportInterpExit, interpExits[i]))
return false;
jitExits[i].offsetBy(offsetInWhole);
metadata_->funcImports[i].initJitExitOffset(jitExits[i].begin);
if (!metadata_->codeRanges.emplaceBack(CodeRange::ImportJitExit, jitExits[i]))
return false;
}
for (JumpTarget target : MakeEnumeratedRange(JumpTarget::Limit)) {
jumpTargets[target].offsetBy(offsetInWhole);
if (!metadata_->codeRanges.emplaceBack(CodeRange::Inline, jumpTargets[target]))
return false;
}
interruptExit.offsetBy(offsetInWhole);
if (!metadata_->codeRanges.emplaceBack(CodeRange::Inline, interruptExit))
return false;
// Fill in LinkData with the offsets of these stubs.
linkData_.interruptOffset = interruptExit.begin;
linkData_.outOfBoundsOffset = jumpTargets[JumpTarget::OutOfBounds].begin;
linkData_.unalignedAccessOffset = jumpTargets[JumpTarget::UnalignedAccess].begin;
linkData_.badIndirectCallOffset = jumpTargets[JumpTarget::BadIndirectCall].begin;
// Only call convertOutOfRangeBranchesToThunks after all other codegen that may
// emit new jumps to JumpTargets has finished.
if (!convertOutOfRangeBranchesToThunks())
return false;
// Now that all thunks have been generated, patch all the thunks.
for (CallThunk& callThunk : metadata_->callThunks) {
uint32_t funcIndex = callThunk.u.funcIndex;
callThunk.u.codeRangeIndex = funcIndexToCodeRange_[funcIndex];
masm_.patchThunk(callThunk.offset, funcCodeRange(funcIndex).funcNonProfilingEntry());
}
for (JumpTarget target : MakeEnumeratedRange(JumpTarget::Limit)) {
for (uint32_t thunkOffset : jumpThunks_[target])
masm_.patchThunk(thunkOffset, jumpTargets[target].begin);
}
// Code-generation is complete!
masm_.finish();
return !masm_.oom();
}
bool
ModuleGenerator::finishCodegen()
{
masm_.haltingAlign(CodeAlignment);
uint32_t offsetInWhole = masm_.size();
uint32_t numFuncExports = metadata_->funcExports.length();
MOZ_ASSERT(numFuncExports == exportedFuncs_.count());
// Generate stubs in a separate MacroAssembler since, otherwise, for modules
// larger than the JumpImmediateRange, even local uses of Label will fail
// due to the large absolute offsets temporarily stored by Label::bind().
OffsetVector entries;
ProfilingOffsetVector interpExits;
ProfilingOffsetVector jitExits;
TrapExitOffsetArray trapExits;
Offsets outOfBoundsExit;
Offsets unalignedAccessExit;
Offsets interruptExit;
Offsets throwStub;
{
TempAllocator alloc(&lifo_);
MacroAssembler masm(MacroAssembler::WasmToken(), alloc);
Label throwLabel;
if (!entries.resize(numFuncExports))
return false;
for (uint32_t i = 0; i < numFuncExports; i++)
entries[i] = GenerateEntry(masm, metadata_->funcExports[i]);
if (!interpExits.resize(numFuncImports()))
return false;
if (!jitExits.resize(numFuncImports()))
return false;
for (uint32_t i = 0; i < numFuncImports(); i++) {
interpExits[i] = GenerateImportInterpExit(masm, metadata_->funcImports[i], i, &throwLabel);
jitExits[i] = GenerateImportJitExit(masm, metadata_->funcImports[i], &throwLabel);
}
for (Trap trap : MakeEnumeratedRange(Trap::Limit))
trapExits[trap] = GenerateTrapExit(masm, trap, &throwLabel);
outOfBoundsExit = GenerateOutOfBoundsExit(masm, &throwLabel);
unalignedAccessExit = GenerateUnalignedExit(masm, &throwLabel);
interruptExit = GenerateInterruptExit(masm, &throwLabel);
throwStub = GenerateThrowStub(masm, &throwLabel);
if (masm.oom() || !masm_.asmMergeWith(masm))
return false;
}
// Adjust each of the resulting Offsets (to account for being merged into
// masm_) and then create code ranges for all the stubs.
for (uint32_t i = 0; i < numFuncExports; i++) {
entries[i].offsetBy(offsetInWhole);
metadata_->funcExports[i].initEntryOffset(entries[i].begin);
if (!metadata_->codeRanges.emplaceBack(CodeRange::Entry, entries[i]))
return false;
}
for (uint32_t i = 0; i < numFuncImports(); i++) {
interpExits[i].offsetBy(offsetInWhole);
metadata_->funcImports[i].initInterpExitOffset(interpExits[i].begin);
if (!metadata_->codeRanges.emplaceBack(CodeRange::ImportInterpExit, interpExits[i]))
return false;
jitExits[i].offsetBy(offsetInWhole);
metadata_->funcImports[i].initJitExitOffset(jitExits[i].begin);
if (!metadata_->codeRanges.emplaceBack(CodeRange::ImportJitExit, jitExits[i]))
return false;
}
for (Trap trap : MakeEnumeratedRange(Trap::Limit)) {
trapExits[trap].offsetBy(offsetInWhole);
if (!metadata_->codeRanges.emplaceBack(CodeRange::TrapExit, trapExits[trap]))
return false;
}
outOfBoundsExit.offsetBy(offsetInWhole);
if (!metadata_->codeRanges.emplaceBack(CodeRange::Inline, outOfBoundsExit))
return false;
unalignedAccessExit.offsetBy(offsetInWhole);
if (!metadata_->codeRanges.emplaceBack(CodeRange::Inline, unalignedAccessExit))
return false;
interruptExit.offsetBy(offsetInWhole);
if (!metadata_->codeRanges.emplaceBack(CodeRange::Inline, interruptExit))
return false;
throwStub.offsetBy(offsetInWhole);
if (!metadata_->codeRanges.emplaceBack(CodeRange::Inline, throwStub))
return false;
// Fill in LinkData with the offsets of these stubs.
linkData_.outOfBoundsOffset = outOfBoundsExit.begin;
linkData_.interruptOffset = interruptExit.begin;
// Now that all other code has been emitted, patch all remaining callsites.
if (!patchCallSites(&trapExits))
return false;
// Now that all code has been generated, patch far jumps to destinations.
for (CallThunk& callThunk : metadata_->callThunks) {
uint32_t funcIndex = callThunk.u.funcIndex;
callThunk.u.codeRangeIndex = funcToCodeRange_[funcIndex];
CodeOffset farJump(callThunk.offset);
masm_.patchFarJump(farJump, funcCodeRange(funcIndex).funcNonProfilingEntry());
}
for (const TrapFarJump& farJump : masm_.trapFarJumps())
masm_.patchFarJump(farJump.jump, trapExits[farJump.trap].begin);
// Code-generation is complete!
masm_.finish();
return !masm_.oom();
}
