huntedbytheirsandSisyphus
53c8531eab
System-headers-only harness timing the five L1 string functions (strlen, strcmp, memcpy, memmove, memset) at 8- and 64-byte inputs. Calls go through volatile function pointers to defeat builtin substitution and LICM hoisting; correctness self-asserts route through the same pointers. Prints FUNC@SIZE ns/call lines. bench_string uses empty per-target CPPFLAGS (no -I include) so it links against whichever libc --with-libc= selects; the bench target runs it always and bench_vlibc only under BENCH_LINK_VLIBC. Both programs relink when config.status changes, so a reconfigure cannot silently reuse a binary from the previous libc. Measured vs glibc 2.44 (median of 3 runs): mem* 1.0-3.3x, strlen/strcmp 3.2-3.9x — word-at-a-time vs AVX2, all sane. Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <[email protected]>
110 lines
1.5 KiB
Plaintext
110 lines
1.5 KiB
Plaintext
# ---> C
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# Prerequisites
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*.d
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# Object files
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*.o
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*.ko
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*.obj
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*.elf
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# Linker output
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*.ilk
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*.map
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*.exp
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# Precompiled Headers
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*.gch
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*.pch
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# Libraries
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*.lib
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*.a
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*.la
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*.lo
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# Shared objects (inc. Windows DLLs)
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*.dll
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*.so
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*.so.*
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*.dylib
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# Executables
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*.exe
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*.out
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*.app
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*.i*86
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*.x86_64
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*.hex
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# Debug files
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*.dSYM/
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*.su
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*.idb
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*.pdb
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# Kernel Module Compile Results
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*.mod*
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*.cmd
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.tmp_versions/
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modules.order
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Module.symvers
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Mkfile.old
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dkms.conf
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# Autotools backup files (autoreconf/autoheader).
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*~
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*.orig
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*.rej
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# ---> vlibc / Autotools
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# Generated build system. `configure` and `autogen.sh` are tracked (layouts/C.md);
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# the Makefiles and other artifacts produced from configure.ac / Makefile.am are not.
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Makefile
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Makefile.in
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.dirstamp
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/aclocal.m4
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/autom4te.cache/
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/config.h
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/config.h.in
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/config.log
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/config.status
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/config.guess
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/config.sub
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/install-sh
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/missing
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/depcomp
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/ltmain.sh
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/libtool
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/libtool.m4
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/ltoptions.m4
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/ltsugar.m4
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/ltversion.m4
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/lt~obsolete.m4
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/stamp-h1
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/build-aux/
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/m4/
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# Generated feature header (from include/vlibc/features.h.in); the template is tracked.
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/include/vlibc/features.h
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# Libtool build directories and artifacts.
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.deps/
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.libs/
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*.lo
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# Build outputs (bin/{release,debug}); keep the directory placeholders.
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/bin/release/*
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!/bin/release/.gitkeep
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/bin/debug/*
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!/bin/debug/.gitkeep
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# Generated compiler drivers (from tools/*.in); the templates are tracked.
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/tools/vlibc-gcc
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/tools/vlibc-clang
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# Built benchmark harnesses (benchmarks/bench_* are generated from bench_*.c).
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/benchmarks/bench_vlibc
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/benchmarks/bench_string
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