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zydis/examples/ZydisPerfTest.c

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/***************************************************************************************************
Zyan Disassembler Library (Zydis)
Original Author : Florian Bernd
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
***************************************************************************************************/
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <Zydis/Zydis.h>
#include <inttypes.h>
#if defined(ZYDIS_WINDOWS)
# include <Windows.h>
#elif defined(ZYDIS_APPLE)
# include <mach/mach_time.h>
#elif defined(ZYDIS_LINUX)
# include <sys/time.h>
# include <pthread.h>
#else
# error "Unsupported platform detected"
#endif
/* ============================================================================================== */
/* Helper functions */
/* ============================================================================================== */
/* ---------------------------------------------------------------------------------------------- */
/* Time measurement */
/* ---------------------------------------------------------------------------------------------- */
#if defined(ZYDIS_WINDOWS)
double CounterFreq = 0.0;
uint64_t CounterStart = 0;
void StartCounter()
{
LARGE_INTEGER li;
if (!QueryPerformanceFrequency(&li))
{
fputs("Error: QueryPerformanceFrequency failed!\n", stderr);
}
CounterFreq = (double)li.QuadPart / 1000.0;
QueryPerformanceCounter(&li);
CounterStart = li.QuadPart;
}
double GetCounter()
{
LARGE_INTEGER li;
QueryPerformanceCounter(&li);
return (double)(li.QuadPart - CounterStart) / CounterFreq;
}
#elif defined(ZYDIS_APPLE)
uint64_t counterStart = 0;
mach_timebase_info_data_t timebaseInfo;
void StartCounter()
{
counterStart = mach_absolute_time();
}
double GetCounter()
{
uint64_t elapsed = mach_absolute_time() - counterStart;
if (timebaseInfo.denom == 0)
{
mach_timebase_info(&timebaseInfo);
}
return (double)elapsed * timebaseInfo.numer / timebaseInfo.denom / 1000000;
}
#elif defined(ZYDIS_LINUX)
struct timeval t1;
void StartCounter()
{
gettimeofday(&t1, NULL);
}
double GetCounter()
{
struct timeval t2;
gettimeofday(&t2, NULL);
double t = (t2.tv_sec - t1.tv_sec) * 1000.0;
return t + (t2.tv_usec - t1.tv_usec) / 1000.0;
}
#endif
/* ---------------------------------------------------------------------------------------------- */
/* Process & Thread Priority */
/* ---------------------------------------------------------------------------------------------- */
void adjustProcessAndThreadPriority()
{
#ifdef ZYDIS_WINDOWS
SYSTEM_INFO info;
GetSystemInfo(&info);
if (info.dwNumberOfProcessors > 1)
{
if (!SetThreadAffinityMask(GetCurrentThread(), (DWORD_PTR)1))
{
fputs("Warning: Could not set thread affinity mask\n", stderr);
}
if (!SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS))
{
fputs("Warning: Could not set process priority class\n", stderr);
}
if (!SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL))
{
fputs("Warning: Could not set thread priority class\n", stderr);
}
}
#endif
#ifdef ZYDIS_LINUX
pthread_t thread = pthread_self();
cpu_set_t cpus;
CPU_ZERO(&cpus);
CPU_SET(0, &cpus);
pthread_setaffinity_np(thread, sizeof(cpus), &cpus);
#endif
}
/* ---------------------------------------------------------------------------------------------- */
/* ============================================================================================== */
/* Internal functions */
/* ============================================================================================== */
uint64_t processBuffer(const char* buffer, size_t length, ZydisBool minimalMode, ZydisBool format)
{
ZydisDecoder decoder;
if (!ZYDIS_SUCCESS(
ZydisDecoderInit(&decoder, ZYDIS_MACHINE_MODE_LONG_64, ZYDIS_ADDRESS_WIDTH_64)))
{
fputs("Failed to initialize decoder\n", stderr);
exit(EXIT_FAILURE);
}
if (!ZYDIS_SUCCESS(
ZydisDecoderEnableMode(&decoder, ZYDIS_DECODER_MODE_MINIMAL, minimalMode)))
{
fputs("Failed to adjust decoder-mode\n", stderr);
exit(EXIT_FAILURE);
}
ZydisFormatter formatter;
if (format)
{
if (!ZYDIS_SUCCESS(ZydisFormatterInit(&formatter, ZYDIS_FORMATTER_STYLE_INTEL)) ||
!ZYDIS_SUCCESS(ZydisFormatterSetProperty(&formatter,
ZYDIS_FORMATTER_PROP_FORCE_MEMSEG, ZYDIS_TRUE)) ||
!ZYDIS_SUCCESS(ZydisFormatterSetProperty(&formatter,
ZYDIS_FORMATTER_PROP_FORCE_MEMSIZE, ZYDIS_TRUE)))
{
fputs("Failed to initialize instruction-formatter\n", stderr);
exit(EXIT_FAILURE);
}
}
uint64_t count = 0;
size_t offset = 0;
ZydisStatus status;
ZydisDecodedInstruction instruction;
char formatBuffer[256];
while ((status = ZydisDecoderDecodeBuffer(&decoder, buffer + offset, length - offset, offset,
&instruction)) != ZYDIS_STATUS_NO_MORE_DATA)
{
ZYDIS_ASSERT(ZYDIS_SUCCESS(status));
if (!ZYDIS_SUCCESS(status))
{
fputs("Unexpected decoding error\n", stderr);
exit(EXIT_FAILURE);
}
++count;
if (format)
{
ZydisFormatterFormatInstruction(
&formatter, &instruction, formatBuffer, sizeof(formatBuffer));
}
offset += instruction.length;
}
return count;
}
void testPerformance(const char* buffer, size_t length, ZydisBool minimalMode, ZydisBool format)
{
// Cache warmup
processBuffer(buffer, length, minimalMode, format);
// Testing
uint64_t count = 0;
StartCounter();
for (uint8_t j = 0; j < 100; ++j)
{
count += processBuffer(buffer, length, minimalMode, format);
}
printf("Minimal-Mode %d, Formatting %d, Instructions: %6.2fM, Time: %8.2f msec\n",
minimalMode, format, (double)count / 1000000, GetCounter());
}
void generateTestData(FILE* file, uint8_t encoding)
{
ZydisDecoder decoder;
if (!ZYDIS_SUCCESS(
ZydisDecoderInit(&decoder, ZYDIS_MACHINE_MODE_LONG_64, ZYDIS_ADDRESS_WIDTH_64)))
{
fputs("Failed to initialize decoder\n", stderr);
exit(EXIT_FAILURE);
}
uint8_t last = 0;
uint32_t count = 0;
ZydisDecodedInstruction instruction;
while (count < 100000)
{
uint8_t data[ZYDIS_MAX_INSTRUCTION_LENGTH];
for (int i = 0; i < ZYDIS_MAX_INSTRUCTION_LENGTH; ++i)
{
data[i] = rand() % 256;
}
const uint8_t offset = rand() % (ZYDIS_MAX_INSTRUCTION_LENGTH - 2);
switch (encoding)
{
case 0:
break;
case 1:
data[offset ] = 0x0F;
data[offset + 1] = 0x0F;
break;
case 2:
data[offset ] = 0x8F;
break;
case 3:
data[offset ] = 0xC4;
break;
case 4:
data[offset ] = 0xC5;
break;
case 5:
case 6:
data[offset ] = 0x62;
break;
default:
ZYDIS_UNREACHABLE;
}
if (ZYDIS_SUCCESS(ZydisDecoderDecodeBuffer(&decoder, data, sizeof(data), 0, &instruction)))
{
ZydisBool b = ZYDIS_FALSE;
switch (encoding)
{
case 0:
b = (instruction.encoding == ZYDIS_INSTRUCTION_ENCODING_DEFAULT);
break;
case 1:
b = (instruction.encoding == ZYDIS_INSTRUCTION_ENCODING_3DNOW);
break;
case 2:
b = (instruction.encoding == ZYDIS_INSTRUCTION_ENCODING_XOP);
break;
case 3:
case 4:
b = (instruction.encoding == ZYDIS_INSTRUCTION_ENCODING_VEX);
break;
case 5:
b = (instruction.encoding == ZYDIS_INSTRUCTION_ENCODING_EVEX);
break;
case 6:
b = (instruction.encoding == ZYDIS_INSTRUCTION_ENCODING_MVEX);
break;
default:
ZYDIS_UNREACHABLE;
}
if (b)
{
fwrite(&instruction.data[0], 1, instruction.length, file);
++count;
const uint8_t p = (uint8_t)((double)count / 100000 * 100);
if (last < p)
{
last = p;
printf("%3.0d%%\n", p);
}
}
}
}
}
/* ============================================================================================== */
/* Entry point */
/* ============================================================================================== */
int main(int argc, char** argv)
{
if (ZydisGetVersion() != ZYDIS_VERSION)
{
fputs("Invalid zydis version\n", stderr);
return EXIT_FAILURE;
}
if (argc < 3 || (strcmp(argv[1], "-test") && strcmp(argv[1], "-generate")))
{
fputs("Usage: PerfTest -[test|generate] [directory]\n", stderr);
return EXIT_FAILURE;
}
ZydisBool generate = ZYDIS_FALSE;
if (!strcmp(argv[1], "-generate"))
{
generate = ZYDIS_TRUE;
}
const char* directory = argv[2];
static const struct
{
const char* encoding;
const char* filename;
} tests[7] =
{
{ "DEFAULT", "enc_default.dat" },
{ "3DNOW" , "enc_3dnow.dat" },
{ "XOP" , "enc_xop.dat" },
{ "VEX_C4" , "enc_vex_c4.dat" },
{ "VEX_C5" , "enc_vex_c5.dat" },
{ "EVEX" , "enc_evex.dat" },
{ "MVEX" , "enc_mvex.dat" }
};
if (generate)
{
time_t t;
srand((unsigned)time(&t));
} else
{
adjustProcessAndThreadPriority();
}
for (uint8_t i = 0; i < ZYDIS_ARRAY_SIZE(tests); ++i)
{
FILE* file;
const size_t len = strlen(directory);
char buf[1024];
strncpy(&buf[0], directory, sizeof(buf) - 1);
if (generate)
{
file = fopen(strncat(buf, tests[i].filename, sizeof(buf) - len - 1), "wb");
} else
{
file = fopen(strncat(buf, tests[i].filename, sizeof(buf) - len - 1), "rb");
}
if (!file)
{
fprintf(stderr, "Can not open file \"%s\": %s\n", &buf[0], strerror(errno));
continue;
}
if (generate)
{
printf("Generating %s ...\n", tests[i].encoding);
generateTestData(file, i);
} else
{
fseek(file, 0L, SEEK_END);
const long length = ftell(file);
void* buffer = malloc(length);
if (!buffer)
{
fprintf(stderr,
"Failed to allocate %" PRIu64 " bytes on the heap", (uint64_t)length);
goto NextFile2;
}
rewind(file);
if (fread(buffer, 1, length, file) != (size_t)length)
{
fprintf(stderr,
"Could not read %" PRIu64 " bytes from file \"%s\"", (uint64_t)length, &buf[0]);
goto NextFile1;
}
printf("Testing %s ...\n", tests[i].encoding);
testPerformance(buffer, length, ZYDIS_TRUE , ZYDIS_FALSE);
testPerformance(buffer, length, ZYDIS_FALSE, ZYDIS_FALSE);
testPerformance(buffer, length, ZYDIS_FALSE, ZYDIS_TRUE );
puts("");
NextFile1:
free(buffer);
}
NextFile2:
fclose(file);
}
return 0;
}
/* ============================================================================================== */
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