1/*
2 * Copyright (C) 2015-2019 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "EntryFrame.h"
29#include "ProfilerDatabase.h"
30#include "VM.h"
31#include "Watchdog.h"
32
33namespace JSC {
34
35bool VM::ensureStackCapacityFor(Register* newTopOfStack)
36{
37#if !ENABLE(C_LOOP)
38 return newTopOfStack >= m_softStackLimit;
39#else
40 return ensureStackCapacityForCLoop(newTopOfStack);
41#endif
42
43}
44
45bool VM::isSafeToRecurseSoft() const
46{
47 bool safe = isSafeToRecurse(m_softStackLimit);
48#if ENABLE(C_LOOP)
49 safe = safe && isSafeToRecurseSoftCLoop();
50#endif
51 return safe;
52}
53
54template<typename Func>
55void VM::logEvent(CodeBlock* codeBlock, const char* summary, const Func& func)
56{
57 if (LIKELY(!m_perBytecodeProfiler))
58 return;
59
60 m_perBytecodeProfiler->logEvent(codeBlock, summary, func());
61}
62
63inline CallFrame* VM::topJSCallFrame() const
64{
65 CallFrame* frame = topCallFrame;
66 if (UNLIKELY(!frame))
67 return frame;
68 if (LIKELY(!frame->isWasmFrame() && !frame->isStackOverflowFrame()))
69 return frame;
70 EntryFrame* entryFrame = topEntryFrame;
71 do {
72 frame = frame->callerFrame(entryFrame);
73 ASSERT(!frame || !frame->isStackOverflowFrame());
74 } while (frame && frame->isWasmFrame());
75 return frame;
76}
77
78} // namespace JSC
79