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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "jit/shared/Assembler-shared.h"
#include "jit/JitSpewer.h"
#include "vm/NativeObject.h"
#include "wasm/WasmFrame.h"
#include "wasm/WasmMemory.h"
namespace js {
namespace wasm {
#ifdef DEBUG
void MemoryAccessDesc::assertOffsetInGuardPages() const {
MOZ_ASSERT(offset_ < (uint64_t)GetMaxOffsetGuardLimit(hugeMemory_));
}
#endif
} // namespace wasm
namespace jit {
void BaseObjectElementIndex::staticAssertions() {
NativeObject::elementsSizeMustNotOverflow();
}
void BaseObjectSlotIndex::staticAssertions() {
NativeObject::slotsSizeMustNotOverflow();
}
AssemblerShared::~AssemblerShared() {
#ifdef DEBUG
while (hasCreator()) {
popCreator();
}
#endif
}
#ifdef DEBUG
void AssemblerShared::pushCreator(const char* who) {
(void)creators_.append(who);
JitSpewStart(JitSpew_Codegen, "# BEGIN creators: ");
bool first = true;
for (const char* str : creators_) {
JitSpewCont(JitSpew_Codegen, "%s%s", first ? "" : "/", str);
first = false;
}
JitSpewCont(JitSpew_Codegen, "\n");
}
void AssemblerShared::popCreator() {
JitSpewStart(JitSpew_Codegen, "# END creators: ");
bool first = true;
for (const char* str : creators_) {
JitSpewCont(JitSpew_Codegen, "%s%s", first ? "" : "/", str);
first = false;
}
JitSpewCont(JitSpew_Codegen, "\n");
if (creators_.empty()) {
JitSpew(JitSpew_Codegen, " ");
}
MOZ_ASSERT(!creators_.empty());
creators_.popBack();
}
bool AssemblerShared::hasCreator() const {
// If you get failures of assertions of the form `MOZ_ASSERT(hasCreator())`,
// what this means is that a `MacroAssembler` (or, really, anything that
// inherits from `js::jit::AssemblerShared`) has emitted code or data from a
// place, in the SM C++ hierarchy, that is not nested within an
// `AutoCreatedBy` RAII scope. Consequently the emitted instructions/data
// won't have any owner that is identifiable in the `IONFLAGS=codegen`
// output.
//
// Fixing this is easy: work back up the crash stack and decide on a place
// to put an `AutoCreatedBy` call. A bit of grepping for `AutoCreatedBy`
// should make it obvious what to do. If in doubt, add `AutoCreatedBy`
// calls liberally; "extra" ones are harmless.
return !creators_.empty();
}
#endif
static uint32_t ABIArgGeneratorStartOffset(ABIKind kind) {
switch (kind) {
case ABIKind::System:
return 0;
case ABIKind::Wasm:
return wasm::FrameWithInstances::sizeOfInstanceFields();
default:
MOZ_CRASH("Invalid ABI kind");
}
}
ABIArgGeneratorShared::ABIArgGeneratorShared(ABIKind kind)
: kind_(kind), stackOffset_(ABIArgGeneratorStartOffset(kind)) {}
} // namespace jit
} // namespace js