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Feat: Detailed debugging tools

This commit is contained in:
Dorian Zedler 2022-07-20 17:46:35 +02:00
parent aa0f1e9170
commit 6cbadae0f2
Signed by: dorian
GPG Key ID: 989DE36109AFA354
10 changed files with 137 additions and 31 deletions
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5
.vscode/tasks.json vendored
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@ -9,8 +9,11 @@
"-g",
"${fileDirname}/*.c",
"${fileDirname}/md2_impls/*.c",
"${fileDirname}/md2_impls/md2_reference/*.c",
"-o",
"${fileDirname}/../md2"
"${fileDirname}/../md2",
"-D",
"MD2_DETAILED_BENCHMARK"
],
"options": {
"cwd": "${fileDirname}"

8
Implementierung/Makefile
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@ -3,7 +3,11 @@
SRC = src/main.c src/helper.c src/io.c src/md2.c src/md2_impls/md2_common.c src/md2_impls/md2_0.c src/md2_impls/md2_1.c src/md2_impls/md2_2.c src/md2_impls/md2_3.c src/md2_impls/md2_reference/md2_reference.c
OBJ = ${subst src,build,${SRC:.c=.o}}
CC = gcc
CFLAGS = -Ilib -ggdb -std=c11 -g -Wall -Wextra -no-pie -O3
DETAILED_BENCHMARK ?= 0
CFLAGS = -Ilib -ggdb -std=c11 -g -Wall -Wextra -no-pie -O3
ifeq ($(DETAILED_BENCHMARK), true)
CFLAGS += -DMD2_DETAILED_BENCHMARK
endif
LDFLAGS = -pthread
TESTFILES = t/1 t/2 t/5 t/10 t/20 t/50 t/100 t/1000 t/2000 t/5000 t/10000
TESTFILES_SIZES = ${subst t/,,${TESTFILES}}
@ -22,6 +26,8 @@ help:
@echo
@echo Available targets:
@echo - all: build everything
@echo " When DETAILED_BENCHMARK=true is passed, the detailed benchmarks are enabled."
@echo " This will decrease the overall performance of the program."
@echo - clean: clean distfiles
@echo - help: show this help
@echo - benchmarks: run benchmarks

2
Implementierung/lib/helper.h
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@ -36,6 +36,8 @@ struct configuration {
enum argumentParseResult parseArguments(int argc, char** argv,
struct configuration* c);
double current_time();
/**
* @brief Run an md2_hash_func with benchmark timing
*

40
Implementierung/lib/md2_impls/md2_common.h
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@ -9,6 +9,42 @@
#include <string.h>
#include <sys/types.h>
#include "../helper.h"
#ifdef MD2_DETAILED_BENCHMARK
#define md2_process_detailed_benchmark_step_if_defined(step) \
md2_process_detailed_benchmark_step(step);
#define md2_print_detailed_benchmark_result_if_defined \
md2_print_detailed_benchmark_result();
#else
#define md2_process_detailed_benchmark_step_if_defined(step)
#define md2_print_detailed_benchmark_result_if_defined
#endif // MD2_DETAILED_BENCHMARK
#define CHECKSUM_START_MARK \
md2_process_detailed_benchmark_step_if_defined(CHECKSUM_START)
#define CHECKSUM_END_MARK \
md2_process_detailed_benchmark_step_if_defined(CHECKSUM_END)
#define FIRST_LOOP_START_MARK \
md2_process_detailed_benchmark_step_if_defined(FIRST_LOOP_START)
#define FIRST_LOOP_END_MARK \
md2_process_detailed_benchmark_step_if_defined(FIRST_LOOP_END)
#define SECOND_LOOP_START_MARK \
md2_process_detailed_benchmark_step_if_defined(SECOND_LOOP_START)
#define SECOND_LOOP_END_MARK \
md2_process_detailed_benchmark_step_if_defined(SECOND_LOOP_END)
#define END_MARK md2_print_detailed_benchmark_result_if_defined
enum md2_detailed_benchmark_step {
CHECKSUM_START = 0,
CHECKSUM_END,
FIRST_LOOP_START,
FIRST_LOOP_END,
SECOND_LOOP_START,
SECOND_LOOP_END
};
/**
* @brief Some digits of pi
*
@ -23,4 +59,8 @@ extern unsigned char MD2_PI_SUBST[256];
*/
void md2_print_buf(size_t len, uint8_t buf[len]);
void md2_process_detailed_benchmark_step(enum md2_detailed_benchmark_step step);
void md2_print_detailed_benchmark_result();
#endif // MD2_COMMON_H

11
Implementierung/src/helper.c
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@ -30,8 +30,13 @@ void help(char *progname) {
1: optimized implementation\n\
2: memory efficient implementation\n\
3: threaded implementation\n\
4: reference implementation\n\
\n",
4: reference implementation\n"
#ifdef MD2_DETAILED_BENCHMARK
"\n\
\n\033[1;33mWARNING: Detailed benchmarking is enabled. This will show detailed benchmaring results\n\
after each hash calculation but will decrease the overall performance.\033[0m"
#endif // MD2_DETAILED_BENCHMARK
"\n",
progname);
}
@ -103,7 +108,7 @@ enum argumentParseResult parseArguments(int argc, char **argv,
return RESULT_OK;
}
double current_time(void) {
double current_time() {
struct timespec t;
clock_gettime(CLOCK_MONOTONIC, &t);
return t.tv_sec + t.tv_nsec * 1e-9;

8
Implementierung/src/md2_impls/md2_0.c
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@ -40,7 +40,9 @@ void md2_hash_0(size_t len, const uint8_t buf[len], uint8_t out[16]) {
// printBuf(len + 16, newBuf);
// === step 2 ===
CHECKSUM_START_MARK
md2_checksum_0(len, newBuf);
CHECKSUM_END_MARK
// printf("buf with cecksum: ");
// printBuf(len + 16, newBuf);
@ -51,28 +53,32 @@ void md2_hash_0(size_t len, const uint8_t buf[len], uint8_t out[16]) {
return;
}
// === step 4 ===
// <= because we need to hash the last block too
for (size_t i = 0; i <= (len + 16) / 16 - 1; i++) {
FIRST_LOOP_START_MARK
for (int j = 0; j < 16; j++) {
messageDigestBuf[16 + j] = newBuf[i * 16 + j];
messageDigestBuf[32 + j] =
(messageDigestBuf[16 + j] ^ messageDigestBuf[j]);
}
FIRST_LOOP_END_MARK
u_int8_t t = 0;
SECOND_LOOP_START_MARK
for (int j = 0; j < 18; j++) {
for (int k = 0; k < 48; k++) {
t = messageDigestBuf[k] = messageDigestBuf[k] ^ MD2_PI_SUBST[t];
}
t = (t + j) % 256;
}
SECOND_LOOP_END_MARK
}
// printf("messageDigestBuf: \n");
// printBuf(16, messageDigestBuf);
END_MARK
memcpy(out, messageDigestBuf, 16);
free(messageDigestBuf);

43
Implementierung/src/md2_impls/md2_1.c
View File

@ -1,17 +1,14 @@
#include "../../lib/md2_impls/md2_1.h"
#include "../../lib/md2_impls/md2_common.h"
#include <immintrin.h>
#include "../../lib/md2_impls/md2_common.h"
void md2_checksum_1(size_t len, uint8_t *buf)
{
void md2_checksum_1(size_t len, uint8_t *buf) {
uint8_t l = 0;
for (size_t i = 0; i < len / 16; i++)
{
for (int j = 0; j < 16; j++)
{
for (size_t i = 0; i < len / 16; i++) {
for (int j = 0; j < 16; j++) {
u_int8_t c = buf[i * 16 + j];
// reference is wrong. It says: Set C[j] to S[c xor L]. But it should be:
buf[len + j] ^= MD2_PI_SUBST[c ^ l];
@ -39,18 +36,17 @@ static uint8_t PADDING[17][16] = {
{15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 0},
{16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16}};
void md2_hash_1(size_t len, const uint8_t buf[len], uint8_t out[16])
{
void md2_hash_1(size_t len, const uint8_t buf[len], uint8_t out[16]) {
// === step 1 ===
int paddingNeeded = 16 - (len & 15);
len += paddingNeeded;
uint8_t* newBuf = aligned_alloc(16, sizeof(uint8_t)*(len + 16));
uint8_t *newBuf = aligned_alloc(16, sizeof(uint8_t) * (len + 16));
if (newBuf == NULL) {
return;
}
for(size_t i = 0; i < 16; i++) {
for (size_t i = 0; i < 16; i++) {
newBuf[len + i] = 0;
}
@ -59,7 +55,9 @@ void md2_hash_1(size_t len, const uint8_t buf[len], uint8_t out[16])
memcpy(newBuf + len - paddingNeeded, PADDING + paddingNeeded, paddingNeeded);
// === step 2 ===
CHECKSUM_START_MARK
md2_checksum_1(len, newBuf);
CHECKSUM_END_MARK
// === step 3 ===
uint8_t *messageDigestBuf = aligned_alloc(16, sizeof(uint8_t) * 48);
@ -74,27 +72,28 @@ void md2_hash_1(size_t len, const uint8_t buf[len], uint8_t out[16])
// === step 4 ===
__m128i vx;
__m128i vy;
for (size_t i = 0; i <= (len + 16) / 16 - 1; i++)
{
vx = _mm_load_si128((__m128i*) (newBuf + i * 16));
_mm_store_si128((__m128i*) (messageDigestBuf + 16), vx);
vy = _mm_load_si128((__m128i*) (messageDigestBuf));
for (size_t i = 0; i <= (len + 16) / 16 - 1; i++) {
FIRST_LOOP_START_MARK
vx = _mm_load_si128((__m128i *)(newBuf + i * 16));
_mm_store_si128((__m128i *)(messageDigestBuf + 16), vx);
vy = _mm_load_si128((__m128i *)(messageDigestBuf));
vy = _mm_xor_si128(vy, vx);
_mm_store_si128((__m128i*) (messageDigestBuf + 32), vy);
_mm_store_si128((__m128i *)(messageDigestBuf + 32), vy);
FIRST_LOOP_END_MARK
u_int8_t t = 0;
for (int j = 0; j < 18; j++)
{
for (int k = 0; k < 48; k++)
{
SECOND_LOOP_START_MARK
for (int j = 0; j < 18; j++) {
for (int k = 0; k < 48; k++) {
t = messageDigestBuf[k] = messageDigestBuf[k] ^ MD2_PI_SUBST[t];
}
t = (t + j) & 255;
}
SECOND_LOOP_END_MARK
}
END_MARK
memcpy(out, messageDigestBuf, 16);
free(messageDigestBuf);

11
Implementierung/src/md2_impls/md2_2.c
View File

@ -3,19 +3,23 @@
#include "../../lib/md2_impls/md2_common.h"
void process_block_hash(uint8_t block[16], uint8_t messageDigestBuf[48]) {
FIRST_LOOP_START_MARK
for (int j = 0; j < 16; j++) {
messageDigestBuf[16 + j] = block[j];
messageDigestBuf[32 + j] = (messageDigestBuf[16 + j] ^ messageDigestBuf[j]);
}
FIRST_LOOP_END_MARK
u_int8_t t = 0;
SECOND_LOOP_START_MARK
for (int j = 0; j < 18; j++) {
for (int k = 0; k < 48; k++) {
t = messageDigestBuf[k] = messageDigestBuf[k] ^ MD2_PI_SUBST[t];
}
t = (t + j) % 256;
}
SECOND_LOOP_END_MARK
}
void process_block_checksum(uint8_t block[16], uint8_t checksum[16],
@ -74,21 +78,24 @@ void md2_hash_2(size_t len, const uint8_t buf[len], uint8_t out[16]) {
return;
}
CHECKSUM_START_MARK
process_block_checksum(data, checksum, &l);
CHECKSUM_END_MARK
process_block_hash(data, messageDigestBuf);
bytes_left_to_read -= bytes_left_to_process;
};
fclose(file);
apply_padding(bytes_left_to_process % 16, data);
process_block_checksum(data, checksum, &l);
process_block_hash(data, messageDigestBuf);
process_block_hash(checksum, messageDigestBuf);
END_MARK
memcpy(out, messageDigestBuf, 16);
fclose(file);
free(data);
free(messageDigestBuf);
free(checksum);

9
Implementierung/src/md2_impls/md2_3.c
View File

@ -10,20 +10,24 @@ struct thread_args {
void process_nothread_hash(size_t len, const uint8_t buf[len],
uint8_t messageDigestBuf[48]) {
for (size_t i = 0; i < (len + 16) / 16 - 1; i++) {
FIRST_LOOP_START_MARK
for (int j = 0; j < 16; j++) {
messageDigestBuf[16 + j] = buf[i * 16 + j];
messageDigestBuf[32 + j] =
(messageDigestBuf[16 + j] ^ messageDigestBuf[j]);
}
FIRST_LOOP_END_MARK
u_int8_t t = 0;
SECOND_LOOP_START_MARK
for (int j = 0; j < 18; j++) {
for (int k = 0; k < 48; k++) {
t = messageDigestBuf[k] = messageDigestBuf[k] ^ MD2_PI_SUBST[t];
}
t = (t + j) % 256;
}
SECOND_LOOP_END_MARK
}
}
@ -48,7 +52,7 @@ void* process_checksum(void* threasdArgs) {
}
uint8_t l = 0;
CHECKSUM_START_MARK
for (size_t i = 0; i < args->len / 16; i++) {
for (int j = 0; j < 16; j++) {
u_int8_t c = args->buf[i * 16 + j];
@ -56,6 +60,7 @@ void* process_checksum(void* threasdArgs) {
l = checksum[j] ^= MD2_PI_SUBST[c ^ l];
}
}
CHECKSUM_END_MARK
pthread_exit(checksum);
}
@ -107,6 +112,8 @@ void md2_hash_3(size_t len, const uint8_t buf[len], uint8_t out[16]) {
}
process_nothread_hash(16, checksum, messageDigestBuf);
END_MARK
memcpy(out, messageDigestBuf, 16);
free(messageDigestBuf);

31
Implementierung/src/md2_impls/md2_common.c
View File

@ -26,4 +26,35 @@ void md2_print_buf(size_t len, uint8_t buf[len]) {
printf("'%02x',", buf[i]);
}
printf("\n");
}
static double detailed_benchmark_timestamps[6] = {0, 0, 0, 0, 0, 0};
static double detailed_benchmark_times[3] = {0, 0, 0};
void md2_process_detailed_benchmark_step(
enum md2_detailed_benchmark_step step) {
switch (step) {
case CHECKSUM_START:
case FIRST_LOOP_START:
case SECOND_LOOP_START:
detailed_benchmark_timestamps[step] = current_time();
return;
case CHECKSUM_END:
case FIRST_LOOP_END:
case SECOND_LOOP_END:
detailed_benchmark_timestamps[step] = current_time();
detailed_benchmark_times[step / 2] +=
detailed_benchmark_timestamps[step] -
detailed_benchmark_timestamps[step - 1];
return;
}
}
void md2_print_detailed_benchmark_result() {
printf("Detailed benchmarking results:\n");
printf(" Checksum: %f\n", detailed_benchmark_times[0]);
printf(" First loop: %f\n", detailed_benchmark_times[1]);
printf(" Second loop: %f\n", detailed_benchmark_times[2]);
printf("\n");
}