mirror of
https://github.com/jart/cosmopolitan.git
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cee6871710
This change adds a double linked list of threads, so that pthread_exit() will know when it should call exit() from an orphaned child. This change also improves ftrace and strace logging.
91 lines
3.8 KiB
C
91 lines
3.8 KiB
C
/*-*- 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 2022 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/calls/blockcancel.internal.h"
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#include "libc/calls/calls.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/runtime/runtime.h"
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#include "libc/str/str.h"
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#include "libc/thread/posixthread.internal.h"
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#include "libc/thread/thread.h"
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#include "third_party/nsync/dll.h"
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#define N 2048
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#define M 15
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#define append(f, ...) o += f(buf + o, N - o, __VA_ARGS__)
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static const char *DescribeStatus(enum PosixThreadStatus status) {
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switch (status) {
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case kPosixThreadJoinable:
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return "JOINAB";
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case kPosixThreadDetached:
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return "DETACH";
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case kPosixThreadTerminated:
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return "TERMIN";
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case kPosixThreadZombie:
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return "ZOMBIE";
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default:
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unreachable;
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}
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}
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static const char *DescribeFlags(char buf[M], struct PosixThread *pt) {
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char *p = buf;
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if (pt->cancelled) *p++ = '*';
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if (pt->flags & PT_EXITING) *p++ = 'X';
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if (pt->flags & PT_STATIC) *p++ = 'S';
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if (pt->flags & PT_OWNSTACK) *p++ = 'O';
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if (pt->flags & PT_ASYNC) *p++ = 'A';
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if (pt->flags & PT_MASKED) *p++ = 'M';
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if (pt->flags & PT_OPENBSD_KLUDGE) *p++ = 'K';
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if (pt->flags & PT_INCANCEL) *p++ = '?';
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if (pt->flags & PT_NOCANCEL) *p++ = '!';
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*p = 0;
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return buf;
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}
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int pthread_print_np(int fd, const char *fmt, ...) {
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va_list va;
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int rc, o = 0;
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nsync_dll_element_ *e;
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struct PosixThread *pt;
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char buf[N], flagbuf[M];
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pthread_spin_lock(&_pthread_lock);
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if (fmt) {
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va_start(va, fmt);
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append(kvsnprintf, fmt, va);
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va_end(va);
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append(ksnprintf, "\n");
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}
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append(ksnprintf, "%6s %6s %6s %6s %s\n", "ptid", "tid", "status", "flags",
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"start");
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for (e = nsync_dll_first_(_pthread_list); e;
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e = nsync_dll_next_(_pthread_list, e)) {
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pt = (struct PosixThread *)e->container;
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append(ksnprintf, "%-6d %-6d %6s %6s %t\n", pt->ptid, pt->tib->tib_tid,
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DescribeStatus(pt->status), DescribeFlags(flagbuf, pt), pt->start);
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}
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pthread_spin_unlock(&_pthread_lock);
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BLOCK_CANCELLATIONS;
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strace_enabled(-1);
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rc = write(fd, buf, strlen(buf));
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strace_enabled(+1);
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ALLOW_CANCELLATIONS;
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return rc;
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}
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