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/*
* Copyright (C) 2012 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "LinkBuffer.h"
#if ENABLE(ASSEMBLER)
#include "Options.h"
namespace JSC {
#if DUMP_LINK_STATISTICS
void LinkBuffer::dumpLinkStatistics(void* code, size_t initializeSize, size_t finalSize)
{
static unsigned linkCount = 0;
static unsigned totalInitialSize = 0;
static unsigned totalFinalSize = 0;
linkCount++;
totalInitialSize += initialSize;
totalFinalSize += finalSize;
dataLogF("link %p: orig %u, compact %u (delta %u, %.2f%%)\n",
code, static_cast<unsigned>(initialSize), static_cast<unsigned>(finalSize),
static_cast<unsigned>(initialSize - finalSize),
100.0 * (initialSize - finalSize) / initialSize);
dataLogF("\ttotal %u: orig %u, compact %u (delta %u, %.2f%%)\n",
linkCount, totalInitialSize, totalFinalSize, totalInitialSize - totalFinalSize,
100.0 * (totalInitialSize - totalFinalSize) / totalInitialSize);
}
#endif
#if DUMP_CODE
void LinkBuffer::dumpCode(void* code, size_t size)
{
#if CPU(ARM_THUMB2)
// Dump the generated code in an asm file format that can be assembled and then disassembled
// for debugging purposes. For example, save this output as jit.s:
// gcc -arch armv7 -c jit.s
// otool -tv jit.o
static unsigned codeCount = 0;
unsigned short* tcode = static_cast<unsigned short*>(code);
size_t tsize = size / sizeof(short);
char nameBuf[128];
snprintf(nameBuf, sizeof(nameBuf), "_jsc_jit%u", codeCount++);
dataLogF("\t.syntax unified\n"
"\t.section\t__TEXT,__text,regular,pure_instructions\n"
"\t.globl\t%s\n"
"\t.align 2\n"
"\t.code 16\n"
"\t.thumb_func\t%s\n"
"# %p\n"
"%s:\n", nameBuf, nameBuf, code, nameBuf);
for (unsigned i = 0; i < tsize; i++)
dataLogF("\t.short\t0x%x\n", tcode[i]);
#elif CPU(ARM_TRADITIONAL)
// gcc -c jit.s
// objdump -D jit.o
static unsigned codeCount = 0;
unsigned int* tcode = static_cast<unsigned int*>(code);
size_t tsize = size / sizeof(unsigned int);
char nameBuf[128];
snprintf(nameBuf, sizeof(nameBuf), "_jsc_jit%u", codeCount++);
dataLogF("\t.globl\t%s\n"
"\t.align 4\n"
"\t.code 32\n"
"\t.text\n"
"# %p\n"
"%s:\n", nameBuf, code, nameBuf);
for (unsigned i = 0; i < tsize; i++)
dataLogF("\t.long\t0x%x\n", tcode[i]);
#endif
}
#endif
} // namespace JSC
#endif // ENABLE(ASSEMBLER)
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