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https://github.com/jart/cosmopolitan.git
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f24c854b28
This change adds tests for the new memory manager code particularly with its windows support. Function call tracing now works reliably on Silicon since our function hooker was missing new Apple self-modifying code APIs Many tests that were disabled a long time ago on aarch64 are reactivated by this change, now that arm support is on equal terms with x86. There's been a lot of places where ftrace could cause deadlocks, which have been hunted down across all platforms thanks to new tests. A bug in Windows's kill() function has been identified.
127 lines
5.2 KiB
C
127 lines
5.2 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 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/atomic.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/sig.internal.h"
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#include "libc/calls/struct/sigset.internal.h"
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#include "libc/calls/syscall-nt.internal.h"
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#include "libc/errno.h"
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#include "libc/intrin/atomic.h"
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#include "libc/intrin/dll.h"
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#include "libc/intrin/strace.h"
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#include "libc/nt/console.h"
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#include "libc/nt/enum/creationdisposition.h"
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#include "libc/nt/enum/ctrlevent.h"
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#include "libc/nt/enum/processaccess.h"
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#include "libc/nt/errors.h"
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#include "libc/nt/memory.h"
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#include "libc/nt/process.h"
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#include "libc/nt/runtime.h"
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#include "libc/proc/proc.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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#ifdef __x86_64__
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textwindows int sys_kill_nt(int pid, int sig) {
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// validate api usage
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if (!(0 <= sig && sig <= 64))
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return einval();
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// XXX: NT doesn't really have process groups. For instance the
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// CreateProcess() flag for starting a process group actually
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// just does an "ignore ctrl-c" internally.
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if (pid < -1)
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pid = -pid;
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// no support for kill all yet
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if (pid == -1)
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return einval();
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// just call raise() if we're targeting self
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if (pid <= 0 || pid == getpid()) {
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if (sig) {
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if (pid <= 0) {
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// if pid is 0 or -1 then kill the processes beneath us too.
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// this isn't entirely right but it's closer to being right.
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// having this behavior is helpful for servers like redbean.
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struct Dll *e;
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BLOCK_SIGNALS;
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__proc_lock();
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for (e = dll_first(__proc.list); e; e = dll_next(__proc.list, e)) {
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atomic_ulong *sigproc;
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struct Proc *pr = PROC_CONTAINER(e);
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if (sig != 9 && (sigproc = __sig_map_process(pid, kNtOpenExisting))) {
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atomic_fetch_or_explicit(sigproc, 1ull << (sig - 1),
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memory_order_release);
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} else {
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TerminateProcess(pr->handle, sig);
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}
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}
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__proc_unlock();
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ALLOW_SIGNALS;
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}
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return raise(sig);
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} else {
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return 0; // ability check passes
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}
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}
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// attempt to signal via shared memory file
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//
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// now that we know the process exists, if it has a shared memory file
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// then we can be reasonably certain it's a cosmo process which should
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// be trusted to deliver its signal, unless it's a nine exterminations
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if (pid > 0 && sig != 9) {
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atomic_ulong *sigproc;
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if ((sigproc = __sig_map_process(pid, kNtOpenExisting))) {
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if (sig > 0)
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atomic_fetch_or_explicit(sigproc, 1ull << (sig - 1),
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memory_order_release);
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UnmapViewOfFile(sigproc);
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if (sig != 9)
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return 0;
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}
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}
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// find existing handle we own for process
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//
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// this step should come first to verify process existence. this is
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// because there's no guarantee that just because the shared memory
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// file exists, the process actually exists.
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int64_t handle, closeme = 0;
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if (!(handle = __proc_handle(pid))) {
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if (!(handle = OpenProcess(kNtProcessTerminate, false, pid)))
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return eperm();
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closeme = handle;
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}
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// perform actual kill
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// process will report WIFSIGNALED with WTERMSIG(sig)
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if (sig != 9)
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STRACE("warning: kill() sending %G via terminate", sig);
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bool32 ok = TerminateProcess(handle, sig);
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if (closeme)
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CloseHandle(closeme);
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if (ok)
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return 0;
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return esrch();
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}
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#endif /* __x86_64__ */
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