mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
933411ba99
- Fix bugs in kDos2Errno definition - malloc() should now be thread safe - Fix bug in rollup.com header generator - Fix open(O_APPEND) on the New Technology - Fix select() on the New Technology and test it - Work towards refactoring i/o for thread safety - Socket reads and writes on NT now poll for signals - Work towards i/o completion ports on the New Technology - Make read() and write() intermittently check for signals - Blinkenlights keyboard i/o so much better on NT w/ poll() - You can now poll() files and sockets at the same time on NT - Fix bug in appendr() that manifests with dlmalloc footers off
293 lines
11 KiB
C
293 lines
11 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 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/weaken.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/ntspawn.h"
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#include "libc/calls/strace.internal.h"
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#include "libc/fmt/itoa.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/macros.internal.h"
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#include "libc/mem/alloca.h"
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#include "libc/mem/mem.h"
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#include "libc/nexgen32e/nt2sysv.h"
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#include "libc/nt/console.h"
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#include "libc/nt/createfile.h"
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#include "libc/nt/enum/accessmask.h"
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#include "libc/nt/enum/creationdisposition.h"
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#include "libc/nt/enum/fileflagandattributes.h"
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#include "libc/nt/enum/filemapflags.h"
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#include "libc/nt/enum/pageflags.h"
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#include "libc/nt/enum/processcreationflags.h"
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#include "libc/nt/enum/startf.h"
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#include "libc/nt/ipc.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/nt/signals.h"
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#include "libc/nt/struct/ntexceptionpointers.h"
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#include "libc/runtime/directmap.internal.h"
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#include "libc/runtime/memtrack.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sock/ntstdin.internal.h"
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#include "libc/sysv/consts/map.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/prot.h"
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STATIC_YOINK("_check_sigchld");
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extern int __pid;
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extern unsigned long long __kbirth;
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extern unsigned char __data_start[]; /* αpε */
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extern unsigned char __data_end[]; /* αpε */
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extern unsigned char __bss_start[]; /* αpε */
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extern unsigned char __bss_end[]; /* αpε */
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bool32 __onntconsoleevent_nt(uint32_t);
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static textwindows char16_t *ParseInt(char16_t *p, int64_t *x) {
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*x = 0;
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while (*p == ' ') p++;
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while ('0' <= *p && *p <= '9') {
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*x *= 10;
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*x += *p++ - '0';
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}
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return p;
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}
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static inline textwindows ssize_t ForkIo(int64_t h, char *p, size_t n,
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bool32 (*f)()) {
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size_t i;
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uint32_t x;
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for (i = 0; i < n; i += x) {
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if (!f(h, p + i, n - i, &x, NULL)) {
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return -1;
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}
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}
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return i;
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}
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static dontinline textwindows bool ForkIo2(int64_t h, void *buf, size_t n,
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bool32 (*fn)(), const char *sf) {
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ssize_t rc = ForkIo(h, buf, n, fn);
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// STRACE("%s(%ld, %'zu) → %'zd% m", sf, h, n, rc);
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return rc != -1;
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}
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static dontinline textwindows bool WriteAll(int64_t h, void *buf, size_t n) {
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return ForkIo2(h, buf, n, WriteFile, "WriteFile");
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}
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static textwindows dontinline bool ReadAll(int64_t h, void *buf, size_t n) {
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return ForkIo2(h, buf, n, ReadFile, "ReadFile");
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}
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textwindows void WinMainForked(void) {
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bool ok;
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jmp_buf jb;
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int64_t reader;
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char *addr, *shad;
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struct DirectMap dm;
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uint64_t size, upsize;
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int64_t savetsc, savebir;
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struct MemoryInterval *maps;
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char16_t fvar[21 + 1 + 21 + 1];
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uint32_t i, varlen, oldprot, savepid;
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long mapcount, mapcapacity, specialz;
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extern uint64_t ts asm("kStartTsc");
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// check to see if the process was actually forked
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// this variable should have the pipe handle numba
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varlen = GetEnvironmentVariable(u"_FORK", fvar, ARRAYLEN(fvar));
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if (!varlen || varlen >= ARRAYLEN(fvar)) return;
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STRACE("WinMainForked()");
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SetEnvironmentVariable(u"_FORK", NULL);
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ParseInt(fvar, &reader);
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// read the cpu state from the parent process & plus
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// read the list of mappings from the parent process
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// this is stored in a special secretive memory map!
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// read ExtendMemoryIntervals for further details :|
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maps = (void *)kMemtrackStart;
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ReadAll(reader, jb, sizeof(jb));
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ReadAll(reader, &mapcount, sizeof(_mmi.i));
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ReadAll(reader, &mapcapacity, sizeof(_mmi.n));
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specialz = ROUNDUP(mapcapacity * sizeof(_mmi.p[0]), kMemtrackGran);
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MapViewOfFileEx(
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CreateFileMapping(-1, 0, kNtPageReadwrite, specialz >> 32, specialz, 0),
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kNtFileMapWrite, 0, 0, specialz, maps);
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ReadAll(reader, maps, mapcount * sizeof(_mmi.p[0]));
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if (IsAsan()) {
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shad = (char *)(((intptr_t)maps >> 3) + 0x7fff8000);
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size = ROUNDUP(specialz >> 3, FRAMESIZE);
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MapViewOfFileEx(
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CreateFileMapping(-1, 0, kNtPageReadwrite, size >> 32, size, 0),
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kNtFileMapWrite, 0, 0, size, maps);
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ReadAll(reader, shad, (mapcount * sizeof(_mmi.p[0])) >> 3);
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}
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// read the heap mappings from the parent process
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for (i = 0; i < mapcount; ++i) {
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addr = (char *)((uint64_t)maps[i].x << 16);
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size = maps[i].size;
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if (maps[i].flags & MAP_PRIVATE) {
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upsize = ROUNDUP(size, FRAMESIZE);
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// we don't need to close the map handle because sys_mmap_nt
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// doesn't mark it inheritable across fork() for MAP_PRIVATE
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maps[i].h = CreateFileMapping(-1, 0, kNtPageExecuteReadwrite,
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upsize >> 32, upsize, 0);
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MapViewOfFileEx(maps[i].h, kNtFileMapWrite | kNtFileMapExecute, 0, 0,
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upsize, addr);
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ReadAll(reader, addr, size);
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} else {
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// we can however safely inherit MAP_SHARED with zero copy
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MapViewOfFileEx(maps[i].h,
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maps[i].readonlyfile
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? kNtFileMapRead | kNtFileMapExecute
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: kNtFileMapWrite | kNtFileMapExecute,
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maps[i].offset >> 32, maps[i].offset, size, addr);
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}
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}
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// read the .data and .bss program image sections
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savepid = __pid;
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savebir = __kbirth;
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savetsc = ts;
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ReadAll(reader, __data_start, __data_end - __data_start);
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ReadAll(reader, __bss_start, __bss_end - __bss_start);
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__pid = savepid;
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__kbirth = savebir;
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ts = savetsc;
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// apply fixups and reapply memory protections
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_mmi.p = maps;
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_mmi.n = specialz / sizeof(_mmi.p[0]);
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for (i = 0; i < mapcount; ++i) {
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VirtualProtect((void *)((uint64_t)maps[i].x << 16), maps[i].size,
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__prot2nt(maps[i].prot, maps[i].iscow), &oldprot);
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}
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// mitosis complete
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CloseHandle(reader);
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// rewrap the stdin named pipe hack
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// since the handles closed on fork
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if (weaken(ForkNtStdinWorker)) weaken(ForkNtStdinWorker)();
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struct Fds *fds = VEIL("r", &g_fds);
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fds->__init_p[0].handle = GetStdHandle(kNtStdInputHandle); // just in case
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fds->__init_p[1].handle = GetStdHandle(kNtStdOutputHandle); // just in case
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fds->__init_p[2].handle = GetStdHandle(kNtStdErrorHandle); // just in case
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// restore the crash reporting stuff
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if (weaken(__wincrash_nt)) {
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AddVectoredExceptionHandler(1, (void *)weaken(__wincrash_nt));
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}
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if (weaken(__onntconsoleevent_nt)) {
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SetConsoleCtrlHandler(weaken(__onntconsoleevent_nt), 1);
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}
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// jump back into function below
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longjmp(jb, 1);
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}
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textwindows int sys_fork_nt(void) {
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bool ok;
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jmp_buf jb;
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char **args, **args2;
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char16_t pipename[64];
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int64_t reader, writer;
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int i, n, pid, untrackpid, rc = -1;
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char *p, forkvar[6 + 21 + 1 + 21 + 1];
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struct NtStartupInfo startinfo;
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struct NtProcessInformation procinfo;
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if (!setjmp(jb)) {
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pid = untrackpid = __reservefd(-1);
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reader = CreateNamedPipe(CreatePipeName(pipename),
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kNtPipeAccessInbound | kNtFileFlagOverlapped,
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kNtPipeTypeMessage | kNtPipeReadmodeMessage, 1,
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65536, 65536, 0, &kNtIsInheritable);
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writer = CreateFile(pipename, kNtGenericWrite, 0, 0, kNtOpenExisting,
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kNtFileFlagOverlapped, 0);
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if (pid != -1 && reader != -1 && writer != -1) {
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p = stpcpy(forkvar, "_FORK=");
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p += uint64toarray_radix10(reader, p);
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bzero(&startinfo, sizeof(startinfo));
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startinfo.cb = sizeof(struct NtStartupInfo);
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startinfo.dwFlags = kNtStartfUsestdhandles;
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startinfo.hStdInput = __getfdhandleactual(0);
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startinfo.hStdOutput = __getfdhandleactual(1);
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startinfo.hStdError = __getfdhandleactual(2);
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args = __argv;
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#ifdef SYSDEBUG
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// If --strace was passed to this program, then propagate it the
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// forked process since the flag was removed by __intercept_flag
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if (__strace > 0) {
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for (n = 0; args[n];) ++n;
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args2 = alloca((n + 2) * sizeof(char *));
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for (i = 0; i < n; ++i) args2[i] = args[i];
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args2[i++] = "--strace";
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args2[i] = 0;
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args = args2;
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}
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#endif
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if (ntspawn(GetProgramExecutableName(), args, environ, forkvar,
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&kNtIsInheritable, NULL, true, 0, NULL, &startinfo,
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&procinfo) != -1) {
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CloseHandle(procinfo.hThread);
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ok = WriteAll(writer, jb, sizeof(jb)) &&
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WriteAll(writer, &_mmi.i, sizeof(_mmi.i)) &&
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WriteAll(writer, &_mmi.n, sizeof(_mmi.n)) &&
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WriteAll(writer, _mmi.p, _mmi.i * sizeof(_mmi.p[0]));
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if (IsAsan() && ok) {
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ok = WriteAll(writer, (char *)(((intptr_t)_mmi.p >> 3) + 0x7fff8000),
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(_mmi.i * sizeof(_mmi.p[0])) >> 3);
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}
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for (i = 0; i < _mmi.i && ok; ++i) {
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if (_mmi.p[i].flags & MAP_PRIVATE) {
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ok = WriteAll(writer, (void *)((uint64_t)_mmi.p[i].x << 16),
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_mmi.p[i].size);
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}
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}
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if (ok) ok = WriteAll(writer, __data_start, __data_end - __data_start);
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if (ok) ok = WriteAll(writer, __bss_start, __bss_end - __bss_start);
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if (ok) {
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if (!CloseHandle(writer)) ok = false;
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writer = -1;
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}
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if (ok) {
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g_fds.p[pid].kind = kFdProcess;
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g_fds.p[pid].handle = procinfo.hProcess;
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g_fds.p[pid].flags = O_CLOEXEC;
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g_fds.p[pid].zombie = false;
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untrackpid = -1;
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rc = pid;
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} else {
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TerminateProcess(procinfo.hProcess, 127);
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CloseHandle(procinfo.hProcess);
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}
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}
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}
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if (reader != -1) CloseHandle(reader);
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if (writer != -1) CloseHandle(writer);
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} else {
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rc = 0;
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}
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if (untrackpid != -1) {
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__releasefd(untrackpid);
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}
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return rc;
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}
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