flounderK
/ intrusive_list.h
Last active
June 28, 2025 16:11
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| #ifndef INTRUSIVE_LIST_H | |
| #define INTRUSIVE_LIST_H | |
| #include <stddef.h> | |
| /* Basic intrusive doubly-linked list node */ | |
| struct list_head { | |
| struct list_head *next, *prev; | |
| }; |
flounderK
/ build_kernel.sh
Created
May 25, 2025 18:56
Build linux kernel in a different output directory
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| git clone https://github.com/torvalds/linux.git | |
| cd linux | |
| mkdir -p build | |
| KBUILD_OUTPUT=build make O=build -j $(($(nproc)-1)) defconfig | |
| KBUILD_OUTPUT=build make O=build -j $(($(nproc)-1)) |
flounderK
/ unbuffered_runner.py
Created
May 7, 2025 01:23
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| import re | |
| import subprocess | |
| import os | |
| import pty | |
| import tty | |
| import fcntl | |
| import stat | |
| import threading | |
| from queue import Queue | |
| import logging |
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| function(set_kconfig_vars_from_file FILENAME) | |
| # Optional Kconfig integration | |
| if(EXISTS "${FILENAME}") | |
| file(READ "${FILENAME}" KCONFIG_CONTENTS) | |
| string(REGEX MATCHALL "CONFIG_[A-Za-z0-9_]+=(y|n)" KCONFIG_LINES "${KCONFIG_CONTENTS}") | |
| foreach(line ${KCONFIG_LINES}) | |
| message("${line}") | |
| string(REPLACE "=" ";" line_parts ${line}) | |
| list(GET line_parts 0 VAR) |
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| git clone https://github.com/llvm/llvm-project.git | |
| cd llvm-project | |
| cmake -S llvm -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DLLVM_INSTALL_UTILS=ON -DLLVM_ENABLE_PROJECTS=clang | |
| ninja -C build |
flounderK
/ gist:de6bce77ea4bea357eff227542eae65b
Created
April 11, 2025 02:53
gather code coverage with clang
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| clang -fprofile-instr-generate -fcoverage-mapping -o main main.c | |
| LLVM_PROFILE_FILE="prof.profraw" ./main | |
| # merge many profraw files into a profdata | |
| llvm-profdata merge -sparse prof.profraw -o prof.profdata | |
| # show coverage | |
| llvm-cov show ./main -instr-profile=prof.profdata |
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| CFLAGS="-fsanitize=undefined" make |
flounderK
/ gist:aa8181351777c8056bb056f8285287a5
Last active
April 11, 2025 02:28
gather code coverage information with gcov in gcc
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| # build targets with code coverage, CFLAGS bit only works if `+=` is used in the make file | |
| CFLAGS="-fprofile-arcs -ftest-coverage" make CC=gcc | |
| # <run test case> | |
| # create files for all coverage reached by test case (don't use if using lcov) | |
| find . -type f -iname '*.gcda' |xargs gcov | |
| # generate coverage file for gcda files under this directory | |
| lcov -c -d . -o coverage.info |
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| import ctypes | |
| def arb_read(addr, size=4): | |
| return bytes((ctypes.c_byte*size).from_address(addr)) | |
| def arb_write(addr, byts): | |
| (ctypes.c_byte*len(byts)).from_address(addr)[:] = byts | |
| def rough_addr_of(a): |
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| # build libdaq from source | |
| git clone https://github.com/snort3/libdaq | |
| cd libdaq | |
| ./bootstrap | |
| mkdir build | |
| cd build | |
| ../configure | |
| make | |
| cd ../../ |
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