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cosmopolitan/libc/runtime/vfork.S

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Polish up repository and other revisions
2020-06-16 13:38:43 +00:00
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
Initial import
2020-06-15 14:18:57 +00:00
│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
Change license
2020-12-28 01:18:44 +00:00
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
Initial import
2020-06-15 14:18:57 +00:00
│ │
Change license
2020-12-28 01:18:44 +00:00
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
Initial import
2020-06-15 14:18:57 +00:00
╚─────────────────────────────────────────────────────────────────────────────*/
Add minor improvements and cleanup
2020-10-27 10:39:46 +00:00
#include "libc/dce.h"
Pay off more technical debt This makes breaking changes to add underscores to many non-standard function names provided by the c library. MODE=tiny is now tinier and we now use smaller locks that are better for tiny apps in this mode. Some headers have been renamed to be in the same folder as the build package, so it'll be easier to know which build dependency is needed. Certain old misguided interfaces have been removed. Intel intrinsics headers are now listed in libc/isystem (but not in the amalgamation) to help further improve open source compatibility. Header complexity has also been reduced. Lastly, more shell scripts are now available.
2022-09-13 06:10:38 +00:00
#include "libc/intrin/strace.internal.h"
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 19:05:08 +00:00
#include "libc/thread/tls.h"
Remove more nonstandard stuff from cosmopolitan.h Fixes #61
2021-03-01 07:42:35 +00:00
#include "libc/macros.internal.h"
Elevate .text.syscall to .privileged It turns out adding OpenBSD msyscall() origin verification broke the --ftrace flag. The executable needs to issue raw syscalls while it's rewriting itself. So they need to be in the same section, and that's just plain simpler too.
2021-02-06 11:17:41 +00:00
.privileged
Initial import
2020-06-15 14:18:57 +00:00
Get codebase completely working with LLVM You can now build Cosmopolitan with Clang: make -j8 MODE=llvm o/llvm/examples/hello.com The assembler and linker code is now friendly to LLVM too. So it's not needed to configure Clang to use binutils under the hood. If you love LLVM then you can now use pure LLVM.
2021-02-08 17:19:00 +00:00
// Forks process without copying page tables.
//
// This is the same as fork() except it's optimized for the case
// where the caller invokes execve() immediately afterwards. You
Improve docs of more system calls This change also found a few POSIX compliance bugs with errnos. Another bug was discovered where, on Windows, pread() and pwrite() could modify the file position in cases where ReadFile() returned an error e.g. when seeking past the end of file. We also have more tests!
2022-10-03 05:14:33 +00:00
// can also call functions like close(), dup2(), etc. Call _exit
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 19:05:08 +00:00
// but don't call exit. Look for vforksafe function annotations,
// For example pthread mutexes are @vforksafe because they don't
// do anything in a vfork()'d child process. TLS memory must not
// be disabled (it's enabled by default) since vfork() needs it.
Get codebase completely working with LLVM You can now build Cosmopolitan with Clang: make -j8 MODE=llvm o/llvm/examples/hello.com The assembler and linker code is now friendly to LLVM too. So it's not needed to configure Clang to use binutils under the hood. If you love LLVM then you can now use pure LLVM.
2021-02-08 17:19:00 +00:00
//
// Do not make the assumption that the parent is suspended until
Improve docs of more system calls This change also found a few POSIX compliance bugs with errnos. Another bug was discovered where, on Windows, pread() and pwrite() could modify the file position in cases where ReadFile() returned an error e.g. when seeking past the end of file. We also have more tests!
2022-10-03 05:14:33 +00:00
// the child terminates since this impl calls fork() on Windows,
// OpenBSD, and MacOS.
Get codebase completely working with LLVM You can now build Cosmopolitan with Clang: make -j8 MODE=llvm o/llvm/examples/hello.com The assembler and linker code is now friendly to LLVM too. So it's not needed to configure Clang to use binutils under the hood. If you love LLVM then you can now use pure LLVM.
2021-02-08 17:19:00 +00:00
//
// @return pid of child process or 0 if forked process
// @returnstwice
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 19:05:08 +00:00
// @threadsafe
Get codebase completely working with LLVM You can now build Cosmopolitan with Clang: make -j8 MODE=llvm o/llvm/examples/hello.com The assembler and linker code is now friendly to LLVM too. So it's not needed to configure Clang to use binutils under the hood. If you love LLVM then you can now use pure LLVM.
2021-02-08 17:19:00 +00:00
// @vforksafe
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 19:05:08 +00:00
vfork: call __require_tls
xor %edi,%edi # dwCreationFlags
Restart CI for New Technology and UBSAN hunting Continuous Integration (via runit and runitd) is now re-enabled on win7 and win10. The `make test` command, which runs the tests on all systems is now the fastest and most stable it's been since the project started. UBSAN is now enabled in MODE=dbg in addition to ASAN. Many instances of undefined behavior have been removed. Mostly things like passing a NULL argument to memcpy(), which works fine with Cosmopolitan Libc, but that doesn't prevents the compiler from being unhappy. There was an issue w/ GNU make where static analysis claims a sprintf() call can overflow. We also now have nicer looking crash reports on Windows since uname should now be supported and msys64 addr2line works reliably.
2022-03-21 10:46:16 +00:00
#ifdef __SANITIZE_ADDRESS__
Introduce --strace flag for system call tracing This is similar to the --ftrace (c function call trace) flag, except it's less noisy since it only logs system calls to stderr. Having this flag is valuable because (1) system call tracing tells us a lot about the behavior of complex programs and (2) it's usually very hard to get system call tracing on various operating systems, e.g. strace, ktrace, dtruss, truss, nttrace, etc. Especially on Apple platforms where even with the special boot trick, debuggers still aren't guaranteed to work. make -j8 o//examples o//examples/hello.com --strace This is enabled by default in MODE=, MODE=opt, and MODE=dbg. In MODE=dbg extra information will be printed. make -j8 MODE=dbg o/dbg/examples o/dbg/examples/hello.com --strace |& less This change also changes: - Rename IsText() → _istext() - Rename IsUtf8() → _isutf8() - Fix madvise() on Windows NT - Fix empty string case of inet_ntop() - vfork() wrapper now saves and restores errno - Update xsigaction() to yoink syscall support
2022-03-19 01:07:28 +00:00
jmp fork # TODO: asan and vfork don't mix?
.endfn vfork,globl
#else
Fix XNU / FreeBSD / OpenBSD / RHEL5 / NT bugs For the first time ever, all tests in this codebase now pass, when run automatically on macos, freebsd, openbsd, rhel5, rhel7, alpine and windows via the network using the runit and runitd build tools - Fix vfork exec path etc. - Add XNU opendir() support - Add OpenBSD opendir() support - Add Linux history to syscalls.sh - Use copy_file_range on FreeBSD 13+ - Fix system calls with 7+ arguments - Fix Windows with greater than 16 FDs - Fix RUNIT.COM and RUNITD.COM flakiness - Fix OpenBSD munmap() when files are mapped - Fix long double so it's actually long on Windows - Fix OpenBSD truncate() and ftruncate() thunk typo - Let Windows fcntl() be used on socket files descriptors - Fix Windows fstat() which had an accidental printf statement - Fix RHEL5 CLOCK_MONOTONIC by not aliasing to CLOCK_MONOTONIC_RAW This is wonderful. I never could have dreamed it would be possible to get it working so well on so many platforms with tiny binaries. Fixes #31 Fixes #25 Fixes #14
2021-01-25 21:08:05 +00:00
#if SupportsWindows()
testb IsWindows()
Introduce --strace flag for system call tracing This is similar to the --ftrace (c function call trace) flag, except it's less noisy since it only logs system calls to stderr. Having this flag is valuable because (1) system call tracing tells us a lot about the behavior of complex programs and (2) it's usually very hard to get system call tracing on various operating systems, e.g. strace, ktrace, dtruss, truss, nttrace, etc. Especially on Apple platforms where even with the special boot trick, debuggers still aren't guaranteed to work. make -j8 o//examples o//examples/hello.com --strace This is enabled by default in MODE=, MODE=opt, and MODE=dbg. In MODE=dbg extra information will be printed. make -j8 MODE=dbg o/dbg/examples o/dbg/examples/hello.com --strace |& less This change also changes: - Rename IsText() → _istext() - Rename IsUtf8() → _isutf8() - Fix madvise() on Windows NT - Fix empty string case of inet_ntop() - vfork() wrapper now saves and restores errno - Update xsigaction() to yoink syscall support
2022-03-19 01:07:28 +00:00
jnz sys_fork_nt # and we're lucky to have that
Fix XNU / FreeBSD / OpenBSD / RHEL5 / NT bugs For the first time ever, all tests in this codebase now pass, when run automatically on macos, freebsd, openbsd, rhel5, rhel7, alpine and windows via the network using the runit and runitd build tools - Fix vfork exec path etc. - Add XNU opendir() support - Add OpenBSD opendir() support - Add Linux history to syscalls.sh - Use copy_file_range on FreeBSD 13+ - Fix system calls with 7+ arguments - Fix Windows with greater than 16 FDs - Fix RUNIT.COM and RUNITD.COM flakiness - Fix OpenBSD munmap() when files are mapped - Fix long double so it's actually long on Windows - Fix OpenBSD truncate() and ftruncate() thunk typo - Let Windows fcntl() be used on socket files descriptors - Fix Windows fstat() which had an accidental printf statement - Fix RHEL5 CLOCK_MONOTONIC by not aliasing to CLOCK_MONOTONIC_RAW This is wonderful. I never could have dreamed it would be possible to get it working so well on so many platforms with tiny binaries. Fixes #31 Fixes #25 Fixes #14
2021-01-25 21:08:05 +00:00
#endif
Don't use vfork() on XNU (#426)
2022-06-23 08:18:47 +00:00
#if SupportsXnu()
testb IsXnu()
jnz fork
#endif
Introduce --strace flag for system call tracing This is similar to the --ftrace (c function call trace) flag, except it's less noisy since it only logs system calls to stderr. Having this flag is valuable because (1) system call tracing tells us a lot about the behavior of complex programs and (2) it's usually very hard to get system call tracing on various operating systems, e.g. strace, ktrace, dtruss, truss, nttrace, etc. Especially on Apple platforms where even with the special boot trick, debuggers still aren't guaranteed to work. make -j8 o//examples o//examples/hello.com --strace This is enabled by default in MODE=, MODE=opt, and MODE=dbg. In MODE=dbg extra information will be printed. make -j8 MODE=dbg o/dbg/examples o/dbg/examples/hello.com --strace |& less This change also changes: - Rename IsText() → _istext() - Rename IsUtf8() → _isutf8() - Fix madvise() on Windows NT - Fix empty string case of inet_ntop() - vfork() wrapper now saves and restores errno - Update xsigaction() to yoink syscall support
2022-03-19 01:07:28 +00:00
#if SupportsOpenbsd()
testb IsOpenbsd()
jnz fork # fake vfork plus msyscall issues
#endif
#ifdef SYSDEBUG
ezlea .Llog,di
call __stracef
#endif /* SYSDEBUG */
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 19:05:08 +00:00
mov %fs:0,%r9 # get thread information block
mov 0x3c(%r9),%r8d # avoid question of @vforksafe errno
Fix XNU / FreeBSD / OpenBSD / RHEL5 / NT bugs For the first time ever, all tests in this codebase now pass, when run automatically on macos, freebsd, openbsd, rhel5, rhel7, alpine and windows via the network using the runit and runitd build tools - Fix vfork exec path etc. - Add XNU opendir() support - Add OpenBSD opendir() support - Add Linux history to syscalls.sh - Use copy_file_range on FreeBSD 13+ - Fix system calls with 7+ arguments - Fix Windows with greater than 16 FDs - Fix RUNIT.COM and RUNITD.COM flakiness - Fix OpenBSD munmap() when files are mapped - Fix long double so it's actually long on Windows - Fix OpenBSD truncate() and ftruncate() thunk typo - Let Windows fcntl() be used on socket files descriptors - Fix Windows fstat() which had an accidental printf statement - Fix RHEL5 CLOCK_MONOTONIC by not aliasing to CLOCK_MONOTONIC_RAW This is wonderful. I never could have dreamed it would be possible to get it working so well on so many platforms with tiny binaries. Fixes #31 Fixes #25 Fixes #14
2021-01-25 21:08:05 +00:00
pop %rsi # saves return address in a register
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 19:05:08 +00:00
mov __NR_vfork(%rip),%eax
Fix XNU / FreeBSD / OpenBSD / RHEL5 / NT bugs For the first time ever, all tests in this codebase now pass, when run automatically on macos, freebsd, openbsd, rhel5, rhel7, alpine and windows via the network using the runit and runitd build tools - Fix vfork exec path etc. - Add XNU opendir() support - Add OpenBSD opendir() support - Add Linux history to syscalls.sh - Use copy_file_range on FreeBSD 13+ - Fix system calls with 7+ arguments - Fix Windows with greater than 16 FDs - Fix RUNIT.COM and RUNITD.COM flakiness - Fix OpenBSD munmap() when files are mapped - Fix long double so it's actually long on Windows - Fix OpenBSD truncate() and ftruncate() thunk typo - Let Windows fcntl() be used on socket files descriptors - Fix Windows fstat() which had an accidental printf statement - Fix RHEL5 CLOCK_MONOTONIC by not aliasing to CLOCK_MONOTONIC_RAW This is wonderful. I never could have dreamed it would be possible to get it working so well on so many platforms with tiny binaries. Fixes #31 Fixes #25 Fixes #14
2021-01-25 21:08:05 +00:00
#if SupportsBsd()
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 19:05:08 +00:00
clc
Fix XNU / FreeBSD / OpenBSD / RHEL5 / NT bugs For the first time ever, all tests in this codebase now pass, when run automatically on macos, freebsd, openbsd, rhel5, rhel7, alpine and windows via the network using the runit and runitd build tools - Fix vfork exec path etc. - Add XNU opendir() support - Add OpenBSD opendir() support - Add Linux history to syscalls.sh - Use copy_file_range on FreeBSD 13+ - Fix system calls with 7+ arguments - Fix Windows with greater than 16 FDs - Fix RUNIT.COM and RUNITD.COM flakiness - Fix OpenBSD munmap() when files are mapped - Fix long double so it's actually long on Windows - Fix OpenBSD truncate() and ftruncate() thunk typo - Let Windows fcntl() be used on socket files descriptors - Fix Windows fstat() which had an accidental printf statement - Fix RHEL5 CLOCK_MONOTONIC by not aliasing to CLOCK_MONOTONIC_RAW This is wonderful. I never could have dreamed it would be possible to get it working so well on so many platforms with tiny binaries. Fixes #31 Fixes #25 Fixes #14
2021-01-25 21:08:05 +00:00
#endif
Add minor improvements and cleanup
2020-10-27 10:39:46 +00:00
syscall
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 19:05:08 +00:00
#if SupportsBsd()
jnc 0f
neg %rax
0:
#endif
Fix XNU / FreeBSD / OpenBSD / RHEL5 / NT bugs For the first time ever, all tests in this codebase now pass, when run automatically on macos, freebsd, openbsd, rhel5, rhel7, alpine and windows via the network using the runit and runitd build tools - Fix vfork exec path etc. - Add XNU opendir() support - Add OpenBSD opendir() support - Add Linux history to syscalls.sh - Use copy_file_range on FreeBSD 13+ - Fix system calls with 7+ arguments - Fix Windows with greater than 16 FDs - Fix RUNIT.COM and RUNITD.COM flakiness - Fix OpenBSD munmap() when files are mapped - Fix long double so it's actually long on Windows - Fix OpenBSD truncate() and ftruncate() thunk typo - Let Windows fcntl() be used on socket files descriptors - Fix Windows fstat() which had an accidental printf statement - Fix RHEL5 CLOCK_MONOTONIC by not aliasing to CLOCK_MONOTONIC_RAW This is wonderful. I never could have dreamed it would be possible to get it working so well on so many platforms with tiny binaries. Fixes #31 Fixes #25 Fixes #14
2021-01-25 21:08:05 +00:00
push %rsi # note it happens twice in same page
cmp $-4095,%eax
Get codebase completely working with LLVM You can now build Cosmopolitan with Clang: make -j8 MODE=llvm o/llvm/examples/hello.com The assembler and linker code is now friendly to LLVM too. So it's not needed to configure Clang to use binutils under the hood. If you love LLVM then you can now use pure LLVM.
2021-02-08 17:19:00 +00:00
jae systemfive_error
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 19:05:08 +00:00
mov %r8d,0x3c(%r9) # restore errno
Fix XNU / FreeBSD / OpenBSD / RHEL5 / NT bugs For the first time ever, all tests in this codebase now pass, when run automatically on macos, freebsd, openbsd, rhel5, rhel7, alpine and windows via the network using the runit and runitd build tools - Fix vfork exec path etc. - Add XNU opendir() support - Add OpenBSD opendir() support - Add Linux history to syscalls.sh - Use copy_file_range on FreeBSD 13+ - Fix system calls with 7+ arguments - Fix Windows with greater than 16 FDs - Fix RUNIT.COM and RUNITD.COM flakiness - Fix OpenBSD munmap() when files are mapped - Fix long double so it's actually long on Windows - Fix OpenBSD truncate() and ftruncate() thunk typo - Let Windows fcntl() be used on socket files descriptors - Fix Windows fstat() which had an accidental printf statement - Fix RHEL5 CLOCK_MONOTONIC by not aliasing to CLOCK_MONOTONIC_RAW This is wonderful. I never could have dreamed it would be possible to get it working so well on so many platforms with tiny binaries. Fixes #31 Fixes #25 Fixes #14
2021-01-25 21:08:05 +00:00
test %eax,%eax
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 19:05:08 +00:00
jnz .Lprnt
.Lchld: orb $TIB_FLAG_VFORKED,0x40(%r9)
ret
.Lprnt: andb $~TIB_FLAG_VFORKED,0x40(%r9)
ret
Add minor improvements and cleanup
2020-10-27 10:39:46 +00:00
.endfn vfork,globl
Introduce --strace flag for system call tracing This is similar to the --ftrace (c function call trace) flag, except it's less noisy since it only logs system calls to stderr. Having this flag is valuable because (1) system call tracing tells us a lot about the behavior of complex programs and (2) it's usually very hard to get system call tracing on various operating systems, e.g. strace, ktrace, dtruss, truss, nttrace, etc. Especially on Apple platforms where even with the special boot trick, debuggers still aren't guaranteed to work. make -j8 o//examples o//examples/hello.com --strace This is enabled by default in MODE=, MODE=opt, and MODE=dbg. In MODE=dbg extra information will be printed. make -j8 MODE=dbg o/dbg/examples o/dbg/examples/hello.com --strace |& less This change also changes: - Rename IsText() → _istext() - Rename IsUtf8() → _isutf8() - Fix madvise() on Windows NT - Fix empty string case of inet_ntop() - vfork() wrapper now saves and restores errno - Update xsigaction() to yoink syscall support
2022-03-19 01:07:28 +00:00
#ifdef SYSDEBUG
.rodata.str1.1
.Llog: .ascii STRACE_PROLOGUE
Make improvements - Expand redbean UNIX module - Expand redbean documentation - Ensure Lua copyright is embedded in binary - Increase the PATH_MAX limit especially on NT - Use column major sorting for linenoise completions - Fix some suboptimalities in redbean's new UNIX API - Figured out right flags for Multics newline in raw mode
2022-04-24 16:59:22 +00:00
.asciz "vfork()\n"
Introduce --strace flag for system call tracing This is similar to the --ftrace (c function call trace) flag, except it's less noisy since it only logs system calls to stderr. Having this flag is valuable because (1) system call tracing tells us a lot about the behavior of complex programs and (2) it's usually very hard to get system call tracing on various operating systems, e.g. strace, ktrace, dtruss, truss, nttrace, etc. Especially on Apple platforms where even with the special boot trick, debuggers still aren't guaranteed to work. make -j8 o//examples o//examples/hello.com --strace This is enabled by default in MODE=, MODE=opt, and MODE=dbg. In MODE=dbg extra information will be printed. make -j8 MODE=dbg o/dbg/examples o/dbg/examples/hello.com --strace |& less This change also changes: - Rename IsText() → _istext() - Rename IsUtf8() → _isutf8() - Fix madvise() on Windows NT - Fix empty string case of inet_ntop() - vfork() wrapper now saves and restores errno - Update xsigaction() to yoink syscall support
2022-03-19 01:07:28 +00:00
.previous
#endif /* DEBUGSYS */
Restart CI for New Technology and UBSAN hunting Continuous Integration (via runit and runitd) is now re-enabled on win7 and win10. The `make test` command, which runs the tests on all systems is now the fastest and most stable it's been since the project started. UBSAN is now enabled in MODE=dbg in addition to ASAN. Many instances of undefined behavior have been removed. Mostly things like passing a NULL argument to memcpy(), which works fine with Cosmopolitan Libc, but that doesn't prevents the compiler from being unhappy. There was an issue w/ GNU make where static analysis claims a sprintf() call can overflow. We also now have nicer looking crash reports on Windows since uname should now be supported and msys64 addr2line works reliably.
2022-03-21 10:46:16 +00:00
#endif /* __SANITIZE_ADDRESS__ */
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