1/*
2 * Copyright (C) 2012 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#include "config.h"
27#include "LinkBuffer.h"
28
29#if ENABLE(ASSEMBLER)
30
31#include "Options.h"
32
33namespace JSC {
34
35#if DUMP_LINK_STATISTICS
36void LinkBuffer::dumpLinkStatistics(void* code, size_t initializeSize, size_t finalSize)
37{
38 static unsigned linkCount = 0;
39 static unsigned totalInitialSize = 0;
40 static unsigned totalFinalSize = 0;
41 linkCount++;
42 totalInitialSize += initialSize;
43 totalFinalSize += finalSize;
44 dataLogF("link %p: orig %u, compact %u (delta %u, %.2f%%)\n",
45 code, static_cast<unsigned>(initialSize), static_cast<unsigned>(finalSize),
46 static_cast<unsigned>(initialSize - finalSize),
47 100.0 * (initialSize - finalSize) / initialSize);
48 dataLogF("\ttotal %u: orig %u, compact %u (delta %u, %.2f%%)\n",
49 linkCount, totalInitialSize, totalFinalSize, totalInitialSize - totalFinalSize,
50 100.0 * (totalInitialSize - totalFinalSize) / totalInitialSize);
51}
52#endif
53
54#if DUMP_CODE
55void LinkBuffer::dumpCode(void* code, size_t size)
56{
57#if CPU(ARM_THUMB2)
58 // Dump the generated code in an asm file format that can be assembled and then disassembled
59 // for debugging purposes. For example, save this output as jit.s:
60 // gcc -arch armv7 -c jit.s
61 // otool -tv jit.o
62 static unsigned codeCount = 0;
63 unsigned short* tcode = static_cast<unsigned short*>(code);
64 size_t tsize = size / sizeof(short);
65 char nameBuf[128];
66 snprintf(nameBuf, sizeof(nameBuf), "_jsc_jit%u", codeCount++);
67 dataLogF("\t.syntax unified\n"
68 "\t.section\t__TEXT,__text,regular,pure_instructions\n"
69 "\t.globl\t%s\n"
70 "\t.align 2\n"
71 "\t.code 16\n"
72 "\t.thumb_func\t%s\n"
73 "# %p\n"
74 "%s:\n", nameBuf, nameBuf, code, nameBuf);
75
76 for (unsigned i = 0; i < tsize; i++)
77 dataLogF("\t.short\t0x%x\n", tcode[i]);
78#endif
79}
80#endif
81
82} // namespace JSC
83
84#endif // ENABLE(ASSEMBLER)
85
86
87

source code of qtdeclarative/src/3rdparty/masm/assembler/LinkBuffer.cpp