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https://github.com/jart/cosmopolitan.git
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791f79fcb3
- We now serialize the file descriptor table when spawning / executing processes on Windows. This means you can now inherit more stuff than just standard i/o. It's needed by bash, which duplicates the console to file descriptor #255. We also now do a better job serializing the environment variables, so you're less likely to encounter E2BIG when using your bash shell. We also no longer coerce environ to uppercase - execve() on Windows now remotely controls its parent process to make them spawn a replacement for itself. Then it'll be able to terminate immediately once the spawn succeeds, without having to linger around for the lifetime as a shell process for proxying the exit code. When process worker thread running in the parent sees the child die, it's given a handle to the new child, to replace it in the process table. - execve() and posix_spawn() on Windows will now provide CreateProcess an explicit handle list. This allows us to remove handle locks which enables better fork/spawn concurrency, with seriously correct thread safety. Other codebases like Go use the same technique. On the other hand fork() still favors the conventional WIN32 inheritence approach which can be a little bit messy, but is *controlled* by guaranteeing perfectly clean slates at both the spawning and execution boundaries - sigset_t is now 64 bits. Having it be 128 bits was a mistake because there's no reason to use that and it's only supported by FreeBSD. By using the system word size, signal mask manipulation on Windows goes very fast. Furthermore @asyncsignalsafe funcs have been rewritten on Windows to take advantage of signal masking, now that it's much more pleasant to use. - All the overlapped i/o code on Windows has been rewritten for pretty good signal and cancelation safety. We're now able to ensure overlap data structures are cleaned up so long as you don't longjmp() out of out of a signal handler that interrupted an i/o operation. Latencies are also improved thanks to the removal of lots of "busy wait" code. Waits should be optimal for everything except poll(), which shall be the last and final demon we slay in the win32 i/o horror show. - getrusage() on Windows is now able to report RUSAGE_CHILDREN as well as RUSAGE_SELF, thanks to aggregation in the process manager thread.
152 lines
5 KiB
C
152 lines
5 KiB
C
#ifndef COSMOPOLITAN_LIBC_RUNTIME_RUNTIME_H_
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#define COSMOPOLITAN_LIBC_RUNTIME_RUNTIME_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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/*───────────────────────────────────────────────────────────────────────────│─╗
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│ cosmopolitan § runtime ─╬─│┼
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╚────────────────────────────────────────────────────────────────────────────│*/
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#ifdef __x86_64__
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typedef long jmp_buf[8];
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typedef long sigjmp_buf[11];
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#elif defined(__aarch64__)
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typedef long jmp_buf[22];
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typedef long sigjmp_buf[25];
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#elif defined(__powerpc64__)
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typedef unsigned __int128 jmp_buf[32];
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#elif defined(__s390x__)
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typedef unsigned long jmp_buf[18];
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#elif defined(__riscv)
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typedef unsigned long jmp_buf[26];
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#endif
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void mcount(void);
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int daemon(int, int);
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unsigned long getauxval(unsigned long);
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int setjmp(jmp_buf)
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libcesque returnstwice paramsnonnull();
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void longjmp(jmp_buf, int) libcesque wontreturn paramsnonnull();
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int _setjmp(jmp_buf)
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libcesque returnstwice paramsnonnull();
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int sigsetjmp(sigjmp_buf, int) libcesque returnstwice paramsnonnull();
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void siglongjmp(sigjmp_buf, int) libcesque wontreturn paramsnonnull();
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void _longjmp(jmp_buf, int) libcesque wontreturn paramsnonnull();
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void exit(int) wontreturn;
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void _exit(int) libcesque wontreturn;
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void _Exit(int) libcesque wontreturn;
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void quick_exit(int) wontreturn;
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void abort(void) wontreturn;
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int __cxa_atexit(void *, void *, void *) paramsnonnull((1)) libcesque;
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int atexit(void (*)(void)) paramsnonnull() libcesque;
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char *getenv(const char *) paramsnonnull() __wur nosideeffect libcesque;
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int putenv(char *);
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int setenv(const char *, const char *, int);
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int unsetenv(const char *);
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int clearenv(void);
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void fpreset(void);
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void *mmap(void *, uint64_t, int32_t, int32_t, int32_t, int64_t);
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int munmap(void *, uint64_t);
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int mprotect(void *, uint64_t, int);
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int msync(void *, size_t, int);
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int mlock(const void *, size_t);
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int munlock(const void *, size_t);
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long gethostid(void);
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int sethostid(long);
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char *getlogin(void);
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int getlogin_r(char *, size_t);
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int login_tty(int);
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int getpagesize(void);
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int syncfs(int);
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int vhangup(void);
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int getdtablesize(void);
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int sethostname(const char *, size_t);
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int acct(const char *);
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#if defined(_GNU_SOURCE) || defined(_COSMO_SOURCE)
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extern char **environ;
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char *secure_getenv(const char *) paramsnonnull() __wur nosideeffect libcesque;
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#endif
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#ifdef _COSMO_SOURCE
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extern int __argc;
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extern char **__argv;
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extern char **__envp;
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extern unsigned long *__auxv;
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extern bool __interruptible;
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extern intptr_t __oldstack;
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extern uint64_t __nosync;
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extern int __strace;
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extern int __ftrace;
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extern uint64_t __syscount;
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extern uint64_t kStartTsc;
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extern const char kNtSystemDirectory[];
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extern const char kNtWindowsDirectory[];
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extern size_t __virtualmax;
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extern size_t __stackmax;
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extern bool __isworker;
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/* utilities */
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void _intsort(int *, size_t);
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void _longsort(long *, size_t);
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/* diagnostics */
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void ShowCrashReports(void);
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int ftrace_install(void);
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int ftrace_enabled(int);
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int strace_enabled(int);
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bool strace_enter(void);
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void __print_maps(void);
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void __printargs(const char *);
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/* builtin sh-like system/popen dsl */
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int _cocmd(int, char **, char **);
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/* executable program */
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char *GetProgramExecutableName(void);
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char *GetInterpreterExecutableName(char *, size_t);
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int __open_executable(void);
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/* execution control */
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int verynice(void);
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void __warn_if_powersave(void);
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void _Exit1(int) libcesque wontreturn;
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void __paginate(int, const char *);
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/* memory management */
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void _weakfree(void *);
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void *_mapanon(size_t) attributeallocsize((1)) mallocesque;
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void *_mapshared(size_t) attributeallocsize((1)) mallocesque;
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void CheckForMemoryLeaks(void);
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void CheckForFileLeaks(void);
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void __enable_threads(void);
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void __oom_hook(size_t);
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bool _isheap(void *);
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/* code morphing */
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void __morph_begin(void);
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void __morph_end(void);
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/* portability */
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int NtGetVersion(void) pureconst;
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bool IsGenuineBlink(void);
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bool IsCygwin(void);
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const char *GetCpuidOs(void);
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const char *GetCpuidEmulator(void);
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void GetCpuidBrand(char[13], uint32_t);
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long __get_rlimit(int);
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const char *__describe_os(void);
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long __get_sysctl(int, int);
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int __get_arg_max(void) pureconst;
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int __get_cpu_count(void) pureconst;
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long __get_avphys_pages(void) pureconst;
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long __get_phys_pages(void) pureconst;
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long __get_minsigstksz(void) pureconst;
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void __get_main_stack(void **, size_t *, int *);
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long __get_safe_size(long, long);
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char *__get_tmpdir(void);
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__funline int __trace_disabled(int x) {
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return 0;
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}
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#ifndef FTRACE
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#define ftrace_enabled __trace_disabled
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#endif
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#ifndef SYSDEBUG
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#define strace_enabled __trace_disabled
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#endif
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#endif /* _COSMO_SOURCE */
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_RUNTIME_RUNTIME_H_ */
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