matu3ba

Segmentation fault at address 0x3e800033cc6
/home/user/dev/git/zi/zig/master/build/stage3/lib/zig/std/os/linux/x86_64.zig:36:5: 0x22d97c in syscall2 
(stacking_panics)
    return asm volatile ("syscall"
    ^
/home/user/dev/git/zi/zig/master/build/stage3/lib/zig/std/os/linux.zig:991:49: 0x20f19f in nanosleep (sta
cking_panics)
    return syscall2(.nanosleep, @ptrToInt(req), @ptrToInt(rem));
                                                ^
/home/user/dev/git/zi/zig/master/build/stage3/lib/zig/std/os.zig:5253:39: 0x20b681 in nanosleep (stacking

matu3ba

/* aeabi.h - declares the ARM run-time helper-function ABI for programs written in C.
 *
 * This is free and unencumbered software released into the public domain.
 *
 * Anyone is free to copy, modify, publish, use, compile, sell, or
 * distribute this software, either in source code form or as a compiled
 * binary, for any purpose, commercial or non-commercial, and by any
 * means.

 * In jurisdictions that recognize copyright laws, the author or authors

matu3ba

#!/usr/bin/env sh
# Building zig in debug mode
cd zigrepo
mkdir -p build/ && cd build/ && cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_PREFIX_PATH="$HOME/dev/git/bootstrap/zig-bootstrap/musl/out/host/" -GNinja && /usr/bin/time -v ninja install  && cd ..
# add zig stages 3 to PATH

zig test --debug-log compilation  -freference-trace --test-filter fubar arenas.zig
zig test --debug-log sema -freference-trace thread.zig

matu3ba

const std = @import("std");

fn t1init(alloc: std.mem.Allocator, path1: []const u8) ![]const u8 {
    const stdout_wr = std.io.getStdOut().writer();
    try stdout_wr.writeAll("t1init"); // prevent compiler to optimize away this fn
    return try alloc.dupe(u8, path1);
}

fn t2init(alloc: std.mem.Allocator, path2: []const u8) ![]const u8 {
    _ = path2;

matu3ba

128bit
(ins)[misterspoon@pc tryzig]$ hyperfine ./addo_crt ./addo_cstruct 
Benchmark 1: ./addo_crt
  Time (mean ± σ):      1.083 s ±  0.006 s    [User: 1.082 s, System: 0.001 s]
  Range (min … max):    1.072 s …  1.094 s    10 runs
 
Benchmark 2: ./addo_cstruct
  Time (mean ± σ):      1.077 s ±  0.003 s    [User: 1.075 s, System: 0.001 s]
  Range (min … max):    1.073 s …  1.082 s    10 runs
 

matu3ba

Assuming MIN < x < MAX:

trick	operation/effect	note
x & (x - 1)	clear lowest 1 bit	if result 0, then x is 2
`x	(x + 1)`	set lowest 0 bit
`x	(x - 1)`	set all bits to right of lowest 1 bit
x & (x + 1)	clear all bits to right of lowest 0 bit
x & -x	extract lowest 1 bit
~x & (x + 1)	extract lowest 0 bit (as 1 bit)

matu3ba

diff --git a/lib/std/fs.zig b/lib/std/fs.zig
index 31354a278..f06db4943 100644
--- a/lib/std/fs.zig
+++ b/lib/std/fs.zig
@@ -2085,6 +2085,44 @@ pub const Dir = struct {
         }
     }
 
+    pub const CountStepsToFolderWithEntryError = error{
+        InvalidKind,

matu3ba

wasm2.c ──────►┌──────┐   ┌──────┐   ┌────┐   ┌──────┐   ┌────┐   ┌────┐   ┌────┐
               │wasm2c│──►│zig1.c│──►│zig1│──►│zig2.c│──►│zig2│──►│zig3│──►│zig4│
          ┌───►└──────┘ ┌►└──────┘┌─►└────┘   └──────┘┌─►└────┘   └────┘   └────┘
          │  zig1.wasm ─┘         │                   │     ▲        ▲        ▲
CC ───────┴───────────────────────┴───────────────────┘     │      binary-identical
                                                            │
idealized, see TODO:                                        │(optional)
used LLVM libs ─────────────────────►┌────┐                 │
 │LLVM│─────────────────┘

matu3ba

    /// Use this for additional posix spawn attributes.
    /// Do not set spawn attribute flags and do not modify stdin, stdout, stderr
    /// behavior, because those are set in the platform-specific spawn method.
    posix_attr: if (os.hasPosixSpawn) ?os.posix_spawn.Attr else void,
    posix_actions: if (os.hasPosixSpawn) ?os.posix_spawn.Actions else void,
            
            
    .posix_attr = if (os.hasPosixSpawn) null else undefined,
    .posix_actions = if (os.hasPosixSpawn) null else undefined,

matu3ba

This is outdated now. Compilation does not use the tmp directory anymore.

** Big picture of the Zig caching system. ** This is a big picture of the Zig caching system, mostly motivated for me to understand the necessary bits to solve ziglang/zig#11643. It reflects the status quo of commit fcfeafe99a3ecc694a3475735c81a0d75b6da6d0. The core logic is defined in src/Cache.zig.

zig-cache/h contains the manifest files with varying content.