Improve performance and remove fd leaks

libc/runtime/fork-nt.c

@@ -65,8 +65,6 @@
 
 #ifdef __x86_64__
 
-__static_yoink("_check_sigchld");
-
 extern int64_t __wincrashearly;
 bool32 __onntconsoleevent(uint32_t);
 void sys_setitimer_nt_reset(void);

libc/runtime/runtime.h

@@ -115,6 +115,8 @@ void __paginate(int, const char *);
 void _weakfree(void *);
 void *_mapanon(size_t) attributeallocsize((1)) mallocesque;
 void *_mapshared(size_t) attributeallocsize((1)) mallocesque;
+void CheckForMemoryLeaks(void);
+void CheckForFileLeaks(void);
 void __enable_threads(void);
 void __oom_hook(size_t);
 bool _isheap(void *);

libc/runtime/stackuse.c

@@ -1,97 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/calls/calls.h"
-#include "libc/dce.h"
-#include "libc/errno.h"
-#include "libc/fmt/itoa.h"
-#include "libc/intrin/atomic.h"
-#include "libc/intrin/promises.internal.h"
-#include "libc/runtime/runtime.h"
-#include "libc/runtime/stack.h"
-#include "libc/str/str.h"
-#include "libc/sysv/consts/o.h"
-
-// TODO(jart): Delete?
-
-STATIC_STACK_ALIGN(GetStackSize());
-
-static char stacklog[1024];
-
-dontasan size_t GetStackUsage(char *s, size_t n) {
-  // RHEL5 MAP_GROWSDOWN seems to only grow to 68kb :'(
-  // So we count non-zero bytes down from the top
-  // First clear 64 bytes is considered the end
-  long *p;
-  size_t got;
-  p = (long *)(s + n);
-  got = 0;
-  for (;;) {
-    p -= 8;
-    if (p[0] | p[1] | p[2] | p[3] | p[4] | p[5] | p[6] | p[7]) {
-      ++got;
-    } else {
-      break;
-    }
-  }
-  return got * 8 * sizeof(long);
-}
-
-static textexit void LogStackUse(void) {
-  bool quote;
-  char *p, *q;
-  int i, e, fd;
-  size_t n, usage;
-  if (!PLEDGED(STDIO) || !PLEDGED(WPATH) || !PLEDGED(CPATH)) return;
-  usage = GetStackUsage((char *)GetStackAddr(), GetStackSize());
-  e = errno;
-  if ((fd = open(stacklog, O_APPEND | O_CREAT | O_WRONLY | O_CLOEXEC, 0644)) !=
-      -1) {
-    p = FormatUint64(stacklog, usage);
-    for (i = 0; i < __argc; ++i) {
-      n = strlen(__argv[i]);
-      if ((q = memchr(__argv[i], '\n', n))) n = q - __argv[i];
-      if (p - stacklog + 1 + 1 + n + 1 + 1 < sizeof(stacklog)) {
-        quote = !!memchr(__argv[i], ' ', n);
-        *p++ = ' ';
-        if (quote) *p++ = '\'';
-        p = mempcpy(p, __argv[i], n);
-        if (quote) *p++ = '\'';
-      } else {
-        break;
-      }
-    }
-    *p++ = '\n';
-    write(fd, stacklog, p - stacklog);
-    close(fd);
-  }
-  errno = e;
-}
-
-static textstartup void LogStackUseInit(void) {
-  if (!PLEDGED(WPATH)) return;
-  if (isdirectory("o/" MODE) &&
-      getcwd(stacklog, sizeof(stacklog) - strlen("/o/" MODE "/stack.log"))) {
-    strcat(stacklog, "/o/" MODE "/stack.log");
-    atexit(LogStackUse);
-  }
-}
-
-const void *const stack_usage_logging[] initarray = {
-    LogStackUseInit,
-};