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cosmopolitan/test/libc/stdio/BUILD.mk

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Initial import
2020-06-15 07:18:57 -07:00
#-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
PKGS += TEST_LIBC_STDIO
Improve mkdeps Our makefile generator now accepts badly formatted include lines. It's now more hermetic with better error checking in the cosmo repo, and it can be configured to not be hermetic at all.
2023-11-10 04:14:27 -08:00
TEST_LIBC_STDIO_FILES := $(wildcard test/libc/stdio/*)
TEST_LIBC_STDIO_SRCS = $(filter %.c,$(TEST_LIBC_STDIO_FILES))
TEST_LIBC_STDIO_INCS = $(filter %.inc,$(TEST_LIBC_STDIO_FILES))
Initial import
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TEST_LIBC_STDIO_SRCS_TEST = $(filter %_test.c,$(TEST_LIBC_STDIO_SRCS))
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 12:05:08 -07:00
TEST_LIBC_STDIO_OBJS = \
Initial import
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$(TEST_LIBC_STDIO_SRCS:%.c=o/$(MODE)/%.o)
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 12:05:08 -07:00
TEST_LIBC_STDIO_COMS = \
Stop using .com extension in monorepo The WIN32 CreateProcess() function does not require an .exe or .com suffix in order to spawn an executable. Now that we have Cosmo bash we're no longer so dependent on the cmd.exe prompt.
2024-03-02 16:57:56 -08:00
$(TEST_LIBC_STDIO_SRCS:%.c=o/$(MODE)/%)
Add x86_64-linux-gnu emulator I wanted a tiny scriptable meltdown proof way to run userspace programs and visualize how program execution impacts memory. It helps to explain how things like Actually Portable Executable works. It can show you how the GCC generated code is going about manipulating matrices and more. I didn't feel fully comfortable with Qemu and Bochs because I'm not smart enough to understand them. I wanted something like gVisor but with much stronger levels of assurances. I wanted a single binary that'll run, on all major operating systems with an embedded GPL barrier ZIP filesystem that is tiny enough to transpile to JavaScript and run in browsers too. https://justine.storage.googleapis.com/emulator625.mp4
2020-08-25 04:23:25 -07:00
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 12:05:08 -07:00
TEST_LIBC_STDIO_BINS = \
$(TEST_LIBC_STDIO_COMS) \
Initial import
2020-06-15 07:18:57 -07:00
$(TEST_LIBC_STDIO_COMS:%=%.dbg)
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 12:05:08 -07:00
TEST_LIBC_STDIO_TESTS = \
Stop using .com extension in monorepo The WIN32 CreateProcess() function does not require an .exe or .com suffix in order to spawn an executable. Now that we have Cosmo bash we're no longer so dependent on the cmd.exe prompt.
2024-03-02 16:57:56 -08:00
$(TEST_LIBC_STDIO_SRCS_TEST:%.c=o/$(MODE)/%.ok)
Initial import
2020-06-15 07:18:57 -07:00
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 12:05:08 -07:00
TEST_LIBC_STDIO_CHECKS = \
Stop using .com extension in monorepo The WIN32 CreateProcess() function does not require an .exe or .com suffix in order to spawn an executable. Now that we have Cosmo bash we're no longer so dependent on the cmd.exe prompt.
2024-03-02 16:57:56 -08:00
$(TEST_LIBC_STDIO_SRCS_TEST:%.c=o/$(MODE)/%.runs)
Initial import
2020-06-15 07:18:57 -07:00
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 12:05:08 -07:00
TEST_LIBC_STDIO_DIRECTDEPS = \
LIBC_CALLS \
LIBC_FMT \
LIBC_INTRIN \
Strongly link glob() into system() and popen()
2024-11-15 20:37:34 -08:00
LIBC_LOG \
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 12:05:08 -07:00
LIBC_MEM \
LIBC_NEXGEN32E \
Make improvements - Every unit test now passes on Apple Silicon. The final piece of this puzzle was porting our POSIX threads cancelation support, since that works differently on ARM64 XNU vs. AMD64. Our semaphore support on Apple Silicon is also superior now compared to AMD64, thanks to the grand central dispatch library which lets *NSYNC locks go faster. - The Cosmopolitan runtime is now more stable, particularly on Windows. To do this, thread local storage is mandatory at all runtime levels, and the innermost packages of the C library is no longer being built using ASAN. TLS is being bootstrapped with a 128-byte TIB during the process startup phase, and then later on the runtime re-allocates it either statically or dynamically to support code using _Thread_local. fork() and execve() now do a better job cooperating with threads. We can now check how much stack memory is left in the process or thread when functions like kprintf() / execve() etc. call alloca(), so that ENOMEM can be raised, reduce a buffer size, or just print a warning. - POSIX signal emulation is now implemented the same way kernels do it with pthread_kill() and raise(). Any thread can interrupt any other thread, regardless of what it's doing. If it's blocked on read/write then the killer thread will cancel its i/o operation so that EINTR can be returned in the mark thread immediately. If it's doing a tight CPU bound operation, then that's also interrupted by the signal delivery. Signal delivery works now by suspending a thread and pushing context data structures onto its stack, and redirecting its execution to a trampoline function, which calls SetThreadContext(GetCurrentThread()) when it's done. - We're now doing a better job managing locks and handles. On NetBSD we now close semaphore file descriptors in forked children. Semaphores on Windows can now be canceled immediately, which means mutexes/condition variables will now go faster. Apple Silicon semaphores can be canceled too. We're now using Apple's pthread_yield() funciton. Apple _nocancel syscalls are now used on XNU when appropriate to ensure pthread_cancel requests aren't lost. The MbedTLS library has been updated to support POSIX thread cancelations. See tool/build/runitd.c for an example of how it can be used for production multi-threaded tls servers. Handles on Windows now leak less often across processes. All i/o operations on Windows are now overlapped, which means file pointers can no longer be inherited across dup() and fork() for the time being. - We now spawn a thread on Windows to deliver SIGCHLD and wakeup wait4() which means, for example, that posix_spawn() now goes 3x faster. POSIX spawn is also now more correct. Like Musl, it's now able to report the failure code of execve() via a pipe although our approach favors using shared memory to do that on systems that have a true vfork() function. - We now spawn a thread to deliver SIGALRM to threads when setitimer() is used. This enables the most precise wakeups the OS makes possible. - The Cosmopolitan runtime now uses less memory. On NetBSD for example, it turned out the kernel would actually commit the PT_GNU_STACK size which caused RSS to be 6mb for every process. Now it's down to ~4kb. On Apple Silicon, we reduce the mandatory upstream thread size to the smallest possible size to reduce the memory overhead of Cosmo threads. The examples directory has a program called greenbean which can spawn a web server on Linux with 10,000 worker threads and have the memory usage of the process be ~77mb. The 1024 byte overhead of POSIX-style thread-local storage is now optional; it won't be allocated until the pthread_setspecific/getspecific functions are called. On Windows, the threads that get spawned which are internal to the libc implementation use reserve rather than commit memory, which shaves a few hundred kb. - sigaltstack() is now supported on Windows, however it's currently not able to be used to handle stack overflows, since crash signals are still generated by WIN32. However the crash handler will still switch to the alt stack, which is helpful in environments with tiny threads. - Test binaries are now smaller. Many of the mandatory dependencies of the test runner have been removed. This ensures many programs can do a better job only linking the the thing they're testing. This caused the test binaries for LIBC_FMT for example, to decrease from 200kb to 50kb - long double is no longer used in the implementation details of libc, except in the APIs that define it. The old code that used long double for time (instead of struct timespec) has now been thoroughly removed. - ShowCrashReports() is now much tinier in MODE=tiny. Instead of doing backtraces itself, it'll just print a command you can run on the shell using our new `cosmoaddr2line` program to view the backtrace. - Crash report signal handling now works in a much better way. Instead of terminating the process, it now relies on SA_RESETHAND so that the default SIG_IGN behavior can terminate the process if necessary. - Our pledge() functionality has now been fully ported to AARCH64 Linux.
2023-09-18 20:44:45 -07:00
LIBC_PROC \
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 12:05:08 -07:00
LIBC_RUNTIME \
LIBC_STDIO \
LIBC_STR \
Strongly link glob() into system() and popen()
2024-11-15 20:37:34 -08:00
LIBC_SYSTEM \
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 12:05:08 -07:00
LIBC_SYSV \
LIBC_TESTLIB \
LIBC_THREAD \
Strongly link glob() into system() and popen()
2024-11-15 20:37:34 -08:00
LIBC_TINYMATH \
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 12:05:08 -07:00
LIBC_X \
Fix bugs in poll(), select(), ppoll(), and pselect() poll() and select() now delegate to ppoll() and pselect() for assurances that both polyfill implementations are correct and well-tested. Poll now polyfills XNU and BSD quirks re: the hanndling of POLLNVAL and the other similar status flags. This change resolves a misunderstanding concerning how select(exceptfds) is intended to map to POLPRI. We now use E2BIG for bouncing requests that exceed the 64 handle limit on Windows. With pipes and consoles on Windows our poll impl will now report POLLHUP correctly. Issues with Windows path generation have been fixed. For example, it was problematic on Windows to say: posix_spawn_file_actions_addchdir_np("/") due to the need to un-UNC paths in some additional places. Calling fstat on UNC style volume path handles will now work. posix_spawn now supports simulating the opening of /dev/null and other special paths on Windows. Cosmopolitan no longer defines epoll(). I think wepoll is a nice project for using epoll() on Windows socket handles. However we need generalized file descriptor support to make epoll() for Windows work well enough for inclusion in a C library. It's also not worth having epoll() if we can't get it to work on XNU and BSD OSes which provide different abstractions. Even epoll() on Linux isn't that great of an abstraction since it's full of footguns. Last time I tried to get it to be useful I had little luck. Considering how long it took to get poll() and select() to be consistent across platforms, we really have no business claiming to have epoll too. While it'd be nice to have fully implemented, the only software that use epoll() are event i/o libraries used by things like nodejs. Event i/o is not the best paradigm for handling i/o; threads make so much more sense.
2024-09-01 19:29:47 -07:00
THIRD_PARTY_COMPILER_RT \
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 12:05:08 -07:00
THIRD_PARTY_GDTOA \
THIRD_PARTY_MBEDTLS \
THIRD_PARTY_MUSL \
Make forking off threads reliable on Windows This change makes posix_spawn_test no longer flaky on Windows, by (1) fixing a race condition in wait(), and (2) removing a misguided vfork implementation which was letting Windows bypass pthread_atfork().
2023-07-30 08:55:01 -07:00
THIRD_PARTY_NSYNC \
Strongly link glob() into system() and popen()
2024-11-15 20:37:34 -08:00
THIRD_PARTY_TZ \
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 12:05:08 -07:00
THIRD_PARTY_ZLIB \
Implement proper time zone support Cosmopolitan now supports 104 time zones. They're embedded inside any binary that links the localtime() function. Doing so adds about 100kb to the binary size. This change also gets time zones working properly on Windows for the first time. It's not needed to have /etc/localtime exist on Windows, since we can get this information from WIN32. We're also now updated to the latest version of Paul Eggert's TZ library.
2024-05-04 23:05:36 -07:00
THIRD_PARTY_ZLIB_GZ \
Initial import
2020-06-15 07:18:57 -07:00
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 12:05:08 -07:00
TEST_LIBC_STDIO_DEPS := \
Initial import
2020-06-15 07:18:57 -07:00
$(call uniq,$(foreach x,$(TEST_LIBC_STDIO_DIRECTDEPS),$($(x))))
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 12:05:08 -07:00
o/$(MODE)/test/libc/stdio/stdio.pkg: \
$(TEST_LIBC_STDIO_OBJS) \
Initial import
2020-06-15 07:18:57 -07:00
$(foreach x,$(TEST_LIBC_STDIO_DIRECTDEPS),$($(x)_A).pkg)
Stop using .com extension in monorepo The WIN32 CreateProcess() function does not require an .exe or .com suffix in order to spawn an executable. Now that we have Cosmo bash we're no longer so dependent on the cmd.exe prompt.
2024-03-02 16:57:56 -08:00
o/$(MODE)/test/libc/stdio/%.dbg: \
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 12:05:08 -07:00
$(TEST_LIBC_STDIO_DEPS) \
o/$(MODE)/test/libc/stdio/%.o \
o/$(MODE)/test/libc/stdio/stdio.pkg \
Stop using .com extension in monorepo The WIN32 CreateProcess() function does not require an .exe or .com suffix in order to spawn an executable. Now that we have Cosmo bash we're no longer so dependent on the cmd.exe prompt.
2024-03-02 16:57:56 -08:00
o/$(MODE)/tool/build/echo.zip.o \
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 12:05:08 -07:00
$(LIBC_TESTMAIN) \
$(CRT) \
Make build hermetic without shell scripts - Fix some minor issues in ar.com - Have execve() look for `ape` command - Rewrite NT paths using /c/ rather /??/c:/ - Replace broken GCC symlinks with .sym files - Rewrite $PATH environment variables on startup - Make $(APE_NO_MODIFY_SELF) the default bootloader - Add all build command dependencies to build/bootstrap - Get the repository mostly building from source on non-Linux
2022-05-25 11:31:08 -07:00
$(APE_NO_MODIFY_SELF)
Initial import
2020-06-15 07:18:57 -07:00
@$(APELINK)
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 12:05:08 -07:00
$(TEST_LIBC_STDIO_OBJS): private \
DEFAULT_CCFLAGS += \
Have execve() escape double quotes in cmd.exe's preferred style This makes it possible for us to use system() and popen() with paths that redirect to filenames that contain spaces, e.g. system("echo.com hello >\"hello there.txt\"") It's difficult to solve this problem, because WIN32 only allows passing one single argument when launching programs and each program is allowed to tokenize that however it wants. Most software follows the convention of cmd.exe which is poorly documented and positively byzantine. In the future we're going to solve this by not using cmd.exe at all and instead embedding the cocmd.com interpreter into the system() function. In the meantime, our documentation has been updated to help recalibrate any expectation the user might hold regarding the security of using the Windows command interpreter. Fixes #644
2022-10-02 08:43:25 -07:00
-fno-builtin
Initial import
2020-06-15 07:18:57 -07:00
Rename makefiles BUILD.mk This way they appear at the top of directory listings.
2023-11-28 11:21:08 -08:00
$(TEST_LIBC_STDIO_OBJS): test/libc/stdio/BUILD.mk
Make improvements - Every unit test now passes on Apple Silicon. The final piece of this puzzle was porting our POSIX threads cancelation support, since that works differently on ARM64 XNU vs. AMD64. Our semaphore support on Apple Silicon is also superior now compared to AMD64, thanks to the grand central dispatch library which lets *NSYNC locks go faster. - The Cosmopolitan runtime is now more stable, particularly on Windows. To do this, thread local storage is mandatory at all runtime levels, and the innermost packages of the C library is no longer being built using ASAN. TLS is being bootstrapped with a 128-byte TIB during the process startup phase, and then later on the runtime re-allocates it either statically or dynamically to support code using _Thread_local. fork() and execve() now do a better job cooperating with threads. We can now check how much stack memory is left in the process or thread when functions like kprintf() / execve() etc. call alloca(), so that ENOMEM can be raised, reduce a buffer size, or just print a warning. - POSIX signal emulation is now implemented the same way kernels do it with pthread_kill() and raise(). Any thread can interrupt any other thread, regardless of what it's doing. If it's blocked on read/write then the killer thread will cancel its i/o operation so that EINTR can be returned in the mark thread immediately. If it's doing a tight CPU bound operation, then that's also interrupted by the signal delivery. Signal delivery works now by suspending a thread and pushing context data structures onto its stack, and redirecting its execution to a trampoline function, which calls SetThreadContext(GetCurrentThread()) when it's done. - We're now doing a better job managing locks and handles. On NetBSD we now close semaphore file descriptors in forked children. Semaphores on Windows can now be canceled immediately, which means mutexes/condition variables will now go faster. Apple Silicon semaphores can be canceled too. We're now using Apple's pthread_yield() funciton. Apple _nocancel syscalls are now used on XNU when appropriate to ensure pthread_cancel requests aren't lost. The MbedTLS library has been updated to support POSIX thread cancelations. See tool/build/runitd.c for an example of how it can be used for production multi-threaded tls servers. Handles on Windows now leak less often across processes. All i/o operations on Windows are now overlapped, which means file pointers can no longer be inherited across dup() and fork() for the time being. - We now spawn a thread on Windows to deliver SIGCHLD and wakeup wait4() which means, for example, that posix_spawn() now goes 3x faster. POSIX spawn is also now more correct. Like Musl, it's now able to report the failure code of execve() via a pipe although our approach favors using shared memory to do that on systems that have a true vfork() function. - We now spawn a thread to deliver SIGALRM to threads when setitimer() is used. This enables the most precise wakeups the OS makes possible. - The Cosmopolitan runtime now uses less memory. On NetBSD for example, it turned out the kernel would actually commit the PT_GNU_STACK size which caused RSS to be 6mb for every process. Now it's down to ~4kb. On Apple Silicon, we reduce the mandatory upstream thread size to the smallest possible size to reduce the memory overhead of Cosmo threads. The examples directory has a program called greenbean which can spawn a web server on Linux with 10,000 worker threads and have the memory usage of the process be ~77mb. The 1024 byte overhead of POSIX-style thread-local storage is now optional; it won't be allocated until the pthread_setspecific/getspecific functions are called. On Windows, the threads that get spawned which are internal to the libc implementation use reserve rather than commit memory, which shaves a few hundred kb. - sigaltstack() is now supported on Windows, however it's currently not able to be used to handle stack overflows, since crash signals are still generated by WIN32. However the crash handler will still switch to the alt stack, which is helpful in environments with tiny threads. - Test binaries are now smaller. Many of the mandatory dependencies of the test runner have been removed. This ensures many programs can do a better job only linking the the thing they're testing. This caused the test binaries for LIBC_FMT for example, to decrease from 200kb to 50kb - long double is no longer used in the implementation details of libc, except in the APIs that define it. The old code that used long double for time (instead of struct timespec) has now been thoroughly removed. - ShowCrashReports() is now much tinier in MODE=tiny. Instead of doing backtraces itself, it'll just print a command you can run on the shell using our new `cosmoaddr2line` program to view the backtrace. - Crash report signal handling now works in a much better way. Instead of terminating the process, it now relies on SA_RESETHAND so that the default SIG_IGN behavior can terminate the process if necessary. - Our pledge() functionality has now been fully ported to AARCH64 Linux.
2023-09-18 20:44:45 -07:00
Initial import
2020-06-15 07:18:57 -07:00
.PHONY: o/$(MODE)/test/libc/stdio
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 12:05:08 -07:00
o/$(MODE)/test/libc/stdio: \
$(TEST_LIBC_STDIO_BINS) \
Initial import
2020-06-15 07:18:57 -07:00
$(TEST_LIBC_STDIO_CHECKS)
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