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Unbloat build config
- 10.5% reduction of o//depend dependency graph
- 8.8% reduction in latency of make command
- Fix issue with temporary file cleanup
There's a new -w option in compile.com that turns off the recent
Landlock output path workaround for "good commands" which do not
unlink() the output file like GNU tooling does.
Our new GNU Make unveil sandboxing appears to have zero overhead
in the grand scheme of things. Full builds are pretty fast since
the only thing that's actually slowed us down is probably libcxx
make -j16 MODE=rel
RL: took 85,732,063µs wall time
RL: ballooned to 323,612kb in size
RL: needed 828,560,521µs cpu (11% kernel)
RL: caused 39,080,670 page faults (99% memcpy)
RL: 350,073 context switches (72% consensual)
RL: performed 0 reads and 11,494,960 write i/o operations
pledge() and unveil() no longer consider ENOSYS to be an error.
These functions have also been added to Python's cosmo module.
This change also removes some WIN32 APIs and System Five magnums
which we're not using and it's doubtful anyone else would be too
This commit is contained in:
Justine Tunney
parent
133c693650
commit
ae5d06dc53
1423 changed files with 2213 additions and 5560 deletions
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@ -23,7 +23,6 @@
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#include "libc/dce.h"
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#include "libc/nexgen32e/msr.h"
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#include "libc/nexgen32e/x86feature.h"
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#include "libc/runtime/interruptiblecall.h"
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#include "libc/runtime/pc.internal.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/sysv/errfuns.h"
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@ -165,36 +164,12 @@ static privileged dontinline int arch_prctl_openbsd(int code, int64_t addr) {
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}
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static char g_fsgs_once;
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static struct InterruptibleCall g_fsgs_icall;
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/**
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* Don't bother.
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*/
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int arch_prctl(int code, int64_t addr) {
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void *fn = arch_prctl_fsgsbase;
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#if 0
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if (!g_fsgs_once) {
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g_fsgs_once = true;
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if (X86_HAVE(FSGSBASE)) {
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g_fsgs_icall.sig = SIGILL;
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if (interruptiblecall(&g_fsgs_icall, fn, code, addr, 0, 0) != -1 &&
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g_fsgs_icall.returnval != -1) {
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/* ivybridge+ (2012) lets us change segment registers without
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needing a 700ns system call. cpuid and /proc/cpuinfo will both
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report it's available; unfortunately, operating systems have an
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added ability to restrict this feature in %cr4, which we're not
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even allowed to read lool */
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g_fsgs_once = 2;
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return 0;
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}
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}
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}
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if (g_fsgs_once == 2) {
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return arch_prctl_fsgsbase(code, addr);
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}
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#endif
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switch (__hostos) {
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case METAL:
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return arch_prctl_msr(code, addr);
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@ -1,74 +0,0 @@
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/bits/safemacros.internal.h"
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#include "libc/mem/mem.h"
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#include "libc/runtime/interruptiblecall.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sysv/consts/sa.h"
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#include "libc/sysv/consts/sig.h"
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STATIC_YOINK("_init_onntconsoleevent");
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static struct InterruptibleCall *g_interruptiblecall;
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wontreturn static void interruptcall(int sig) {
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longjmp(g_interruptiblecall->jb, 1);
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unreachable;
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}
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/**
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* Calls function that may be cancelled by a signal.
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*
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* @param state is allocated and zero'd by the caller; state→sig and
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* state→sa_new.sa_mask may be set; it may be re-used w/o
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* reinitializing; it may be static or heap memory; it may be stack
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* memory if re-entrant behavior isn't needed
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* @return the value returned by callback or -1 on interrupt; they may
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* be differentiated using the state→returnval filed, which is only
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* modified by this function when callbacks succeed
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*/
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intptr_t interruptiblecall(struct InterruptibleCall *icall,
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intptr_t callback(intptr_t p1, intptr_t p2,
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intptr_t p3, intptr_t p4),
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intptr_t p1, intptr_t p2, intptr_t p3, intptr_t p4) {
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intptr_t rc;
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if (!icall->sig) icall->sig = SIGINT;
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icall->sa_new.sa_handler = interruptcall;
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icall->sa_new.sa_flags |= SA_RESTART | SA_RESETHAND;
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if ((rc = (sigaction)(icall->sig, &icall->sa_new, &icall->sa_old)) != -1) {
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icall->prev = g_interruptiblecall;
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g_interruptiblecall = icall;
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if (!setjmp(icall->jb)) {
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icall->returnval = rc = callback(p1, p2, p3, p4);
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} else {
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rc = -1;
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}
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asm volatile("" ::: "memory");
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struct InterruptibleCall *unwind;
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for (;;) {
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unwind = g_interruptiblecall;
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(sigaction)(unwind->sig, &unwind->sa_old, NULL);
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g_interruptiblecall = unwind->prev;
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if (unwind == icall) break;
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free_s(&unwind);
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}
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icall->prev = NULL;
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}
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return rc;
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}
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@ -1,26 +0,0 @@
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#ifndef COSMOPOLITAN_LIBC_RUNTIME_INTERRUPTIBLECALL_H_
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#define COSMOPOLITAN_LIBC_RUNTIME_INTERRUPTIBLECALL_H_
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#include "libc/runtime/runtime.h"
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#include "libc/calls/struct/sigaction.h"
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#include "libc/calls/calls.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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struct InterruptibleCall {
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struct InterruptibleCall *prev;
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intptr_t returnval;
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int sig;
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int flags;
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jmp_buf jb;
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struct sigaction sa_new;
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struct sigaction sa_old;
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};
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intptr_t interruptiblecall(struct InterruptibleCall *state,
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intptr_t callback(intptr_t p1, intptr_t p2,
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intptr_t p3, intptr_t p4),
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intptr_t p1, intptr_t p2, intptr_t p3, intptr_t p4);
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_RUNTIME_INTERRUPTIBLECALL_H_ */
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