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Support non-blocking i/o across platforms

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This change introduces new tests for `O_NONBLOCK` and `SOCK_NONBLOCK` to
confirm that non-blocking i/o is now working on all supported platforms,
including Windows. For example, you can now say on Windows, MacOS, etc.:

    socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);

To create a non-blocking IPv4 TCP socket. Or you can enable non-blocking
i/o on an existing socket / pipe / etc. file descriptor by calling fcntl

    fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);

This functionality is polyfilled on older Linux kernels too, e.g. RHEL5.
Now that fcntl() support is much better the FIOCLEX / FIONCLEX polyfills
for ioctl() have been removed since they're ugly non-POSIX diameond APIs

This change fixes a weakness in kprintf() that was causing Windows trace
tools to frequently crash.
This commit is contained in:
Justine Tunney 2023-07-23 02:56:47 -07:00
parent 5c9e03e3e0
commit 1d4eb08fa1
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GPG key ID: BE714B4575D6E328
102 changed files with 678 additions and 331 deletions
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18
third_party/python/Modules/termios.c vendored
View file

@ -684,11 +684,21 @@ PyInit_termios(void)
PyModule_AddIntConstant(m, "CWERASE", CWERASE);
/* ioctl */
#ifdef FIOCLEX
PyModule_AddIntConstant(m, "FIOCLEX", FIOCLEX);
#endif
#ifdef FIONCLEX
PyModule_AddIntConstant(m, "FIONCLEX", FIONCLEX);
#endif
#ifdef FIONBIO
PyModule_AddIntConstant(m, "FIONBIO", FIONBIO);
#endif
#ifdef FIONREAD
PyModule_AddIntConstant(m, "FIONREAD", FIONREAD);
#endif
#ifdef FIOASYNC
PyModule_AddIntConstant(m, "FIOASYNC", FIOASYNC);
#endif
if (EXTA) PyModule_AddIntConstant(m, "EXTA", EXTA);
if (EXTB) PyModule_AddIntConstant(m, "EXTB", EXTB);
@ -744,17 +754,25 @@ PyInit_termios(void)
/* TODO(jart): NOSTOP */
/* TODO(jart): START */
/* TODO(jart): STOP */
#ifdef TIOCSCTTY
if (TIOCSCTTY) PyModule_AddIntConstant(m, "TIOCSCTTY", TIOCSCTTY);
#endif
/* TODO(jart): TIOCSERCONFIG */
/* TODO(jart): TIOCSERGSTRUCT */
/* TODO(jart): TIOCSERGWILD */
/* TODO(jart): TIOCSERSWILD */
#ifdef TIOCSETD
if (TIOCSETD) PyModule_AddIntConstant(m, "TIOCSETD", TIOCSETD);
#endif
/* TODO(jart): TIOCSLCKTRMIOS */
#ifdef TIOCSPGRP
if (TIOCSPGRP) PyModule_AddIntConstant(m, "TIOCSPGRP", TIOCSPGRP);
#endif
/* TODO(jart): TIOCSSERIAL */
/* TODO(jart): TIOCSSOFTCAR */
#ifdef TIOCSTI
if (TIOCSTI) PyModule_AddIntConstant(m, "TIOCSTI", TIOCSTI);
#endif
/* TODO(jart): TIOCTTYGSTRUCT */
return m;