paroj

// gcc -O3 -S -masm=intel -fverbose-asm test.c
// (code : out : in : clobber)
asm volatile ("" :: "g"(&a) : "memory");

// see also: https://www.youtube.com/watch?v=nXaxk27zwlk

paroj

#include <cstring>
#include <cmath>
#include <cstdio>
#include <ctime>
#include <cstdlib>
#include <sstream>

#define NITER 5000000

int main() {

paroj

#include <cstring>
#include <cmath>
#include <cstdio>
#include <ctime>
#include <cstdlib>
#include <vector>
#define NITER 100//5000000

int main() {
    clock_t t;

paroj

g++ -std=c++11 -O3 -S -masm=intel -fverbose-asm main.cpp # -mllvm --x86-asm-syntax=intel

paroj

#!/bin/sh
# compile with -fno-omit-frame-pointer
# usermode
sudo sh -c "echo 0 > /proc/sys/kernel/kptr_restrict"
sudo sh -c 'echo 1 >/proc/sys/kernel/perf_event_paranoid'
# record with callgraph
perf record -g $1
# display with inverse callgraph
perf report -g 'graph,0.5,caller'

paroj

#include <SDL2/SDL.h>
#include <SDL2/SDL_vulkan.h>
#include <vulkan/vulkan.hpp>
#include <algorithm>

VkBool32 debug_callback(VkDebugUtilsMessageSeverityFlagBitsEXT messageSeverity,
                        VkDebugUtilsMessageTypeFlagsEXT messageTypes,
                        const VkDebugUtilsMessengerCallbackDataEXT* pCallbackData, void* pUserData)
{
    auto types = vk::to_string((vk::DebugUtilsMessageTypeFlagsEXT)messageTypes);

paroj

{
    // launch python through GDB to break in CPP code
    "version": "0.2.0",
    "configurations": [
        {
            "name": "GDB Python: Current File",
            "type": "cppdbg",
            "request": "launch",
            "program": "/usr/bin/python",
            "args": [