michaeljclark

Low Level Variable Length Intermediate Representation

Note: this an unofficial early draft of a work in progress specification. The LLVLIR specification has moved...

Introduction

Low Level Variable Length Intermediate Representation is a succinct target independent byte-code for deferred translation.

michaeljclark

/*
 * ftload.cc   loads TrueType Bézier curves for codepoint using FreeType
 *
 * Compile:    c++ -std=c++17 -o ftload ftload.cc -Ithird_party/glm \
 *                 $(pkg-config --cflags --libs freetype2)
 *
 * Usage:      ./ftload <ttf-file> <dpi> <size> <code-point>
 *
 * Example:    ./ftload DejaVuSans.ttf 72 32 99
 */

michaeljclark

/*
 * maj2_random
 *
 * maj2_random is a simplified floating point hash function derived from SHA-2,
 * retaining its high quality entropy compression function modified to permute
 * entropy from a vec2 (designed for UV coordinates) returning float values
 * between 0.0 and 1.0. since maj2_random is a hash function it will return
 * coherent noise. vector argument can be truncated prior to increase grain.
 */

michaeljclark

# GitHub workflow to merge commits > n-days from a work branch to trunk.
#
# this is a low-overhead workflow implementing a time lock intended to
# allow people to rebase on a work branch but avoid rebases on trunk.
#
# the workflow is scheduled to fast-forward the target branch to the
# most recent commit in the source branch that is older than n-days.
#
# if there is a commit older than n-days common to both branches, the
# action will do nothing. the action will error in the case of commits

michaeljclark

Dear All,

I am sharing a patch for ld.so to show relative addresses and add
justified output. The goal of this patch is to increase `ldd` readability:

 - modify trace output to use relative addresses by default.
 - add alternative trace output mode with left-justified addresses.

The relative addresses are composed by subtracting the ELF ehdr address
which makes the output constant under address space layout randomization.

michaeljclark

#!/bin/sh
T=$(mktemp fooXXXXXX)
echo $* | xxd -r -p - > ${T}
objdump -D -bbinary -mi386:x86-64 -Mintel ${T} | \
	sed -n '/<.data>:/{n;s/0://g p}'
rm -f ${T}

michaeljclark

diff --git a/include/mimalloc-internal.h b/include/mimalloc-internal.h
index 7160bc474a71..3970e35a2c25 100644
--- a/include/mimalloc-internal.h
+++ b/include/mimalloc-internal.h
@@ -114,6 +114,8 @@ void       _mi_heap_set_default_direct(mi_heap_t* heap);
 
 // "stats.c"
 void       _mi_stats_done(mi_stats_t* stats);
+void       _mi_hist_log(size_t size);
+void       _mi_hist_dump(mi_output_fun* out);

michaeljclark

#!/usr/bin/perl
#
# usage ./ISO-6093-NR3.pl (relaxed|stric) <float>
#
# parse ISO 6093 floating point decimal representation NR3
#
# 'relaxed'
#
#   - prohibits missing decimal point. e.g. '1'              ERROR
#   - permits leading zeros on integer. e.g. '01.23e10'      OK

michaeljclark

#
# clang modules-ts example
#

source       = src
modules      = build/modules
objects      = build/objects
output       = build/output

CXX          = clang++

michaeljclark

#pragma once

#  Ticket Lock
# 
#  Ticket locks are fair spinlocks that order acccess on a first-in,
#  first-out basis. The lock is composed of a head counter and a tail
#  counter. The head counter indicates the ticket number of the current
#  lock owner. The tail counter indicates the last issued ticket number.
#  To acquire the lock, the acquiring thread atomically increments the
#  tail counter to assign itself a ticket number. It then waits until