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 | |
33 | namespace JSC { |
34 | |
35 | #if DUMP_LINK_STATISTICS |
36 | void 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 |
55 | void 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 | |