2020-06-15 14:18:57 +00:00
|
|
|
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
|
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
|
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
|
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
|
|
|
│ │
|
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. │
|
2020-06-15 14:18:57 +00:00
|
|
|
│ │
|
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. │
|
2020-06-15 14:18:57 +00:00
|
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
2022-10-14 16:52:35 +00:00
|
|
|
#include "ape/sections.internal.h"
|
2020-06-15 14:18:57 +00:00
|
|
|
#include "libc/calls/calls.h"
|
|
|
|
|
#include "libc/calls/internal.h"
|
2022-05-23 22:06:11 +00:00
|
|
|
#include "libc/calls/state.internal.h"
|
2021-10-14 00:27:13 +00:00
|
|
|
#include "libc/calls/struct/metasigaltstack.h"
|
2022-08-13 20:11:56 +00:00
|
|
|
#include "libc/calls/struct/sigaction.h"
|
2022-10-10 14:36:07 +00:00
|
|
|
#include "libc/calls/struct/siginfo-meta.internal.h"
|
2022-04-13 05:11:00 +00:00
|
|
|
#include "libc/calls/struct/siginfo-xnu.internal.h"
|
2020-06-15 14:18:57 +00:00
|
|
|
#include "libc/calls/struct/siginfo.h"
|
|
|
|
|
#include "libc/calls/ucontext.h"
|
2021-07-12 06:17:47 +00:00
|
|
|
#include "libc/intrin/repstosb.h"
|
2022-05-16 20:20:08 +00:00
|
|
|
#include "libc/log/libfatal.internal.h"
|
2022-08-13 20:11:56 +00:00
|
|
|
#include "libc/runtime/runtime.h"
|
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.
2023-09-19 03:44:45 +00:00
|
|
|
#include "libc/runtime/stack.h"
|
2020-06-15 14:18:57 +00:00
|
|
|
#include "libc/str/str.h"
|
2021-10-14 00:27:13 +00:00
|
|
|
#include "libc/sysv/consts/sa.h"
|
2020-06-15 14:18:57 +00:00
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* @fileoverview XNU kernel callback normalization.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
struct __darwin_mmst_reg {
|
|
|
|
|
char __mmst_reg[10];
|
|
|
|
|
char __mmst_rsrv[6];
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_xmm_reg {
|
|
|
|
|
char __xmm_reg[16];
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_ymm_reg {
|
|
|
|
|
char __ymm_reg[32];
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_zmm_reg {
|
|
|
|
|
char __zmm_reg[64];
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_opmask_reg {
|
|
|
|
|
char __opmask_reg[8];
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_x86_thread_state64 {
|
|
|
|
|
uint64_t __rax;
|
|
|
|
|
uint64_t __rbx;
|
|
|
|
|
uint64_t __rcx;
|
|
|
|
|
uint64_t __rdx;
|
|
|
|
|
uint64_t __rdi;
|
|
|
|
|
uint64_t __rsi;
|
|
|
|
|
uint64_t __rbp;
|
|
|
|
|
uint64_t __rsp;
|
|
|
|
|
uint64_t __r8;
|
|
|
|
|
uint64_t __r9;
|
|
|
|
|
uint64_t __r10;
|
|
|
|
|
uint64_t __r11;
|
|
|
|
|
uint64_t __r12;
|
|
|
|
|
uint64_t __r13;
|
|
|
|
|
uint64_t __r14;
|
|
|
|
|
uint64_t __r15;
|
|
|
|
|
uint64_t __rip;
|
|
|
|
|
uint64_t __rflags;
|
|
|
|
|
uint64_t __cs;
|
|
|
|
|
uint64_t __fs;
|
|
|
|
|
uint64_t __gs;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_x86_thread_full_state64 {
|
|
|
|
|
struct __darwin_x86_thread_state64 ss64;
|
|
|
|
|
uint64_t __ds;
|
|
|
|
|
uint64_t __es;
|
|
|
|
|
uint64_t __ss;
|
|
|
|
|
uint64_t __gsbase;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_x86_float_state64 {
|
|
|
|
|
int32_t __fpu_reserved[2];
|
2021-02-26 02:30:17 +00:00
|
|
|
uint16_t __fpu_fcw;
|
|
|
|
|
uint16_t __fpu_fsw;
|
2020-06-15 14:18:57 +00:00
|
|
|
uint8_t __fpu_ftw;
|
|
|
|
|
uint8_t __fpu_rsrv1;
|
|
|
|
|
uint16_t __fpu_fop;
|
|
|
|
|
uint32_t __fpu_ip;
|
|
|
|
|
uint16_t __fpu_cs;
|
|
|
|
|
uint16_t __fpu_rsrv2;
|
|
|
|
|
uint32_t __fpu_dp;
|
|
|
|
|
uint16_t __fpu_ds;
|
|
|
|
|
uint16_t __fpu_rsrv3;
|
|
|
|
|
uint32_t __fpu_mxcsr;
|
|
|
|
|
uint32_t __fpu_mxcsrmask;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm0;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm1;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm2;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm3;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm4;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm5;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm6;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm7;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm0;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm1;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm2;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm3;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm4;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm5;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm6;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm7;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm8;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm9;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm10;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm11;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm12;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm13;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm14;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm15;
|
2021-02-26 02:30:17 +00:00
|
|
|
char __fpu_rsrv4[96];
|
2020-06-15 14:18:57 +00:00
|
|
|
int32_t __fpu_reserved1;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_x86_avx_state64 {
|
|
|
|
|
int32_t __fpu_reserved[2];
|
2021-02-26 02:30:17 +00:00
|
|
|
uint16_t __fpu_fcw;
|
|
|
|
|
uint16_t __fpu_fsw;
|
2020-06-15 14:18:57 +00:00
|
|
|
uint8_t __fpu_ftw;
|
|
|
|
|
uint8_t __fpu_rsrv1;
|
|
|
|
|
uint16_t __fpu_fop;
|
|
|
|
|
uint32_t __fpu_ip;
|
|
|
|
|
uint16_t __fpu_cs;
|
|
|
|
|
uint16_t __fpu_rsrv2;
|
|
|
|
|
uint32_t __fpu_dp;
|
|
|
|
|
uint16_t __fpu_ds;
|
|
|
|
|
uint16_t __fpu_rsrv3;
|
|
|
|
|
uint32_t __fpu_mxcsr;
|
|
|
|
|
uint32_t __fpu_mxcsrmask;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm0;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm1;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm2;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm3;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm4;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm5;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm6;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm7;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm0;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm1;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm2;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm3;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm4;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm5;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm6;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm7;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm8;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm9;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm10;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm11;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm12;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm13;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm14;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm15;
|
|
|
|
|
char __fpu_rsrv4[6 * 16];
|
|
|
|
|
int32_t __fpu_reserved1;
|
|
|
|
|
char __avx_reserved1[64];
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh0;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh1;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh2;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh3;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh4;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh5;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh6;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh7;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh8;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh9;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh10;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh11;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh12;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh13;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh14;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh15;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_x86_avx512_state64 {
|
|
|
|
|
int32_t __fpu_reserved[2];
|
2021-02-26 02:30:17 +00:00
|
|
|
uint16_t __fpu_fcw;
|
|
|
|
|
uint16_t __fpu_fsw;
|
2020-06-15 14:18:57 +00:00
|
|
|
uint8_t __fpu_ftw;
|
|
|
|
|
uint8_t __fpu_rsrv1;
|
|
|
|
|
uint16_t __fpu_fop;
|
|
|
|
|
uint32_t __fpu_ip;
|
|
|
|
|
uint16_t __fpu_cs;
|
|
|
|
|
uint16_t __fpu_rsrv2;
|
|
|
|
|
uint32_t __fpu_dp;
|
|
|
|
|
uint16_t __fpu_ds;
|
|
|
|
|
uint16_t __fpu_rsrv3;
|
|
|
|
|
uint32_t __fpu_mxcsr;
|
|
|
|
|
uint32_t __fpu_mxcsrmask;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm0;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm1;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm2;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm3;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm4;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm5;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm6;
|
|
|
|
|
struct __darwin_mmst_reg __fpu_stmm7;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm0;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm1;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm2;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm3;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm4;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm5;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm6;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm7;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm8;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm9;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm10;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm11;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm12;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm13;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm14;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_xmm15;
|
|
|
|
|
char __fpu_rsrv4[6 * 16];
|
|
|
|
|
int32_t __fpu_reserved1;
|
|
|
|
|
char __avx_reserved1[64];
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh0;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh1;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh2;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh3;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh4;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh5;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh6;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh7;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh8;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh9;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh10;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh11;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh12;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh13;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh14;
|
|
|
|
|
struct __darwin_xmm_reg __fpu_ymmh15;
|
|
|
|
|
struct __darwin_opmask_reg __fpu_k0;
|
|
|
|
|
struct __darwin_opmask_reg __fpu_k1;
|
|
|
|
|
struct __darwin_opmask_reg __fpu_k2;
|
|
|
|
|
struct __darwin_opmask_reg __fpu_k3;
|
|
|
|
|
struct __darwin_opmask_reg __fpu_k4;
|
|
|
|
|
struct __darwin_opmask_reg __fpu_k5;
|
|
|
|
|
struct __darwin_opmask_reg __fpu_k6;
|
|
|
|
|
struct __darwin_opmask_reg __fpu_k7;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh0;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh1;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh2;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh3;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh4;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh5;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh6;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh7;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh8;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh9;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh10;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh11;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh12;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh13;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh14;
|
|
|
|
|
struct __darwin_ymm_reg __fpu_zmmh15;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm16;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm17;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm18;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm19;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm20;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm21;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm22;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm23;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm24;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm25;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm26;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm27;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm28;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm29;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm30;
|
|
|
|
|
struct __darwin_zmm_reg __fpu_zmm31;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_x86_exception_state64 {
|
|
|
|
|
uint16_t __trapno;
|
|
|
|
|
uint16_t __cpu;
|
|
|
|
|
uint32_t __err;
|
|
|
|
|
uint64_t __faultvaddr;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_x86_debug_state64 {
|
|
|
|
|
uint64_t __dr0;
|
|
|
|
|
uint64_t __dr1;
|
|
|
|
|
uint64_t __dr2;
|
|
|
|
|
uint64_t __dr3;
|
|
|
|
|
uint64_t __dr4;
|
|
|
|
|
uint64_t __dr5;
|
|
|
|
|
uint64_t __dr6;
|
|
|
|
|
uint64_t __dr7;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_x86_cpmu_state64 {
|
|
|
|
|
uint64_t __ctrs[16];
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_mcontext64_full {
|
|
|
|
|
struct __darwin_x86_exception_state64 __es;
|
|
|
|
|
struct __darwin_x86_thread_full_state64 __ss;
|
|
|
|
|
struct __darwin_x86_float_state64 __fs;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_mcontext_avx64 {
|
|
|
|
|
struct __darwin_x86_exception_state64 __es;
|
|
|
|
|
struct __darwin_x86_thread_state64 __ss;
|
|
|
|
|
struct __darwin_x86_avx_state64 __fs;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_mcontext_avx64_full {
|
|
|
|
|
struct __darwin_x86_exception_state64 __es;
|
|
|
|
|
struct __darwin_x86_thread_full_state64 __ss;
|
|
|
|
|
struct __darwin_x86_avx_state64 __fs;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_mcontext_avx512_64 {
|
|
|
|
|
struct __darwin_x86_exception_state64 __es;
|
|
|
|
|
struct __darwin_x86_thread_state64 __ss;
|
|
|
|
|
struct __darwin_x86_avx512_state64 __fs;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_mcontext_avx512_64_full {
|
|
|
|
|
struct __darwin_x86_exception_state64 __es;
|
|
|
|
|
struct __darwin_x86_thread_full_state64 __ss;
|
|
|
|
|
struct __darwin_x86_avx512_state64 __fs;
|
|
|
|
|
};
|
|
|
|
|
|
2023-05-19 02:05:08 +00:00
|
|
|
struct __darwin_arm_exception_state64 {
|
|
|
|
|
uint64_t far;
|
|
|
|
|
uint32_t esr;
|
|
|
|
|
uint32_t exception;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_arm_thread_state64 {
|
|
|
|
|
uint64_t __x[29];
|
|
|
|
|
uint64_t __fp;
|
|
|
|
|
uint64_t __lr;
|
|
|
|
|
uint64_t __sp;
|
|
|
|
|
uint64_t __pc;
|
|
|
|
|
uint32_t __cpsr;
|
|
|
|
|
uint32_t __pad;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_arm_vfp_state {
|
|
|
|
|
uint32_t __r[64];
|
|
|
|
|
uint32_t __fpscr;
|
|
|
|
|
};
|
|
|
|
|
|
2020-06-15 14:18:57 +00:00
|
|
|
struct __darwin_mcontext64 {
|
2023-05-19 02:05:08 +00:00
|
|
|
#ifdef __x86_64__
|
2020-06-15 14:18:57 +00:00
|
|
|
struct __darwin_x86_exception_state64 __es;
|
|
|
|
|
struct __darwin_x86_thread_state64 __ss;
|
|
|
|
|
struct __darwin_x86_float_state64 __fs;
|
2023-05-19 02:05:08 +00:00
|
|
|
#elif defined(__aarch64__)
|
|
|
|
|
struct __darwin_arm_exception_state64 __es;
|
|
|
|
|
struct __darwin_arm_thread_state64 __ss;
|
|
|
|
|
struct __darwin_arm_vfp_state __fs;
|
|
|
|
|
#endif
|
2020-06-15 14:18:57 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct __darwin_ucontext {
|
|
|
|
|
int32_t uc_onstack;
|
|
|
|
|
uint32_t uc_sigmask;
|
2021-10-14 00:27:13 +00:00
|
|
|
struct sigaltstack_bsd uc_stack;
|
2020-06-15 14:18:57 +00:00
|
|
|
struct __darwin_ucontext *uc_link;
|
|
|
|
|
uint64_t uc_mcsize;
|
|
|
|
|
struct __darwin_mcontext64 *uc_mcontext;
|
|
|
|
|
};
|
|
|
|
|
|
2023-05-19 02:05:08 +00:00
|
|
|
#ifdef __x86_64__
|
|
|
|
|
|
2022-05-16 20:20:08 +00:00
|
|
|
static privileged void xnuexceptionstate2linux(
|
2020-06-15 14:18:57 +00:00
|
|
|
mcontext_t *mc, struct __darwin_x86_exception_state64 *xnues) {
|
|
|
|
|
mc->trapno = xnues->__trapno;
|
|
|
|
|
mc->err = xnues->__err;
|
|
|
|
|
}
|
|
|
|
|
|
2022-05-16 20:20:08 +00:00
|
|
|
static privileged void linuxexceptionstate2xnu(
|
2021-02-26 02:30:17 +00:00
|
|
|
struct __darwin_x86_exception_state64 *xnues, mcontext_t *mc) {
|
|
|
|
|
xnues->__trapno = mc->trapno;
|
|
|
|
|
xnues->__err = mc->err;
|
|
|
|
|
}
|
|
|
|
|
|
2022-05-16 20:20:08 +00:00
|
|
|
static privileged void xnuthreadstate2linux(
|
2021-10-14 00:27:13 +00:00
|
|
|
mcontext_t *mc, struct __darwin_x86_thread_state64 *xnuss) {
|
2020-06-15 14:18:57 +00:00
|
|
|
mc->rdi = xnuss->__rdi;
|
|
|
|
|
mc->rsi = xnuss->__rsi;
|
|
|
|
|
mc->rbp = xnuss->__rbp;
|
|
|
|
|
mc->rbx = xnuss->__rbx;
|
|
|
|
|
mc->rdx = xnuss->__rdx;
|
|
|
|
|
mc->rax = xnuss->__rax;
|
|
|
|
|
mc->rcx = xnuss->__rcx;
|
|
|
|
|
mc->rsp = xnuss->__rsp;
|
|
|
|
|
mc->rip = xnuss->__rip;
|
|
|
|
|
mc->cs = xnuss->__cs;
|
|
|
|
|
mc->gs = xnuss->__gs;
|
|
|
|
|
mc->fs = xnuss->__fs;
|
|
|
|
|
mc->eflags = xnuss->__rflags;
|
2021-07-12 06:17:47 +00:00
|
|
|
mc->r8 = xnuss->__r8;
|
|
|
|
|
mc->r9 = xnuss->__r9;
|
|
|
|
|
mc->r10 = xnuss->__r10;
|
|
|
|
|
mc->r11 = xnuss->__r11;
|
|
|
|
|
mc->r12 = xnuss->__r12;
|
|
|
|
|
mc->r13 = xnuss->__r13;
|
|
|
|
|
mc->r14 = xnuss->__r14;
|
|
|
|
|
mc->r15 = xnuss->__r15;
|
2020-06-15 14:18:57 +00:00
|
|
|
}
|
|
|
|
|
|
2022-05-16 20:20:08 +00:00
|
|
|
static privileged void linuxthreadstate2xnu(
|
2021-03-02 06:02:27 +00:00
|
|
|
struct __darwin_x86_thread_state64 *xnuss, ucontext_t *uc, mcontext_t *mc) {
|
2021-02-26 02:30:17 +00:00
|
|
|
xnuss->__rdi = mc->rdi;
|
|
|
|
|
xnuss->__rsi = mc->rsi;
|
|
|
|
|
xnuss->__rbp = mc->rbp;
|
|
|
|
|
xnuss->__rbx = mc->rbx;
|
|
|
|
|
xnuss->__rdx = mc->rdx;
|
|
|
|
|
xnuss->__rax = mc->rax;
|
|
|
|
|
xnuss->__rcx = mc->rcx;
|
|
|
|
|
xnuss->__rsp = mc->rsp;
|
|
|
|
|
xnuss->__rip = mc->rip;
|
|
|
|
|
xnuss->__cs = mc->cs;
|
|
|
|
|
xnuss->__gs = mc->gs;
|
|
|
|
|
xnuss->__fs = mc->fs;
|
|
|
|
|
xnuss->__rflags = mc->eflags;
|
2021-07-12 06:17:47 +00:00
|
|
|
xnuss->__r8 = mc->r8;
|
|
|
|
|
xnuss->__r9 = mc->r9;
|
|
|
|
|
xnuss->__r10 = mc->r10;
|
|
|
|
|
xnuss->__r11 = mc->r11;
|
|
|
|
|
xnuss->__r12 = mc->r12;
|
|
|
|
|
xnuss->__r13 = mc->r13;
|
|
|
|
|
xnuss->__r14 = mc->r14;
|
|
|
|
|
xnuss->__r15 = mc->r15;
|
|
|
|
|
}
|
|
|
|
|
|
2022-05-16 20:20:08 +00:00
|
|
|
static privileged void CopyFpXmmRegs(void *d, const void *s) {
|
2021-07-12 06:17:47 +00:00
|
|
|
size_t i;
|
|
|
|
|
for (i = 0; i < (8 + 16) * 16; i += 16) {
|
2023-06-08 12:17:28 +00:00
|
|
|
__memcpy((char *)d + i, (const char *)s + i, 16);
|
2021-07-12 06:17:47 +00:00
|
|
|
}
|
2021-02-26 02:30:17 +00:00
|
|
|
}
|
|
|
|
|
|
2022-05-16 20:20:08 +00:00
|
|
|
static privileged void xnussefpustate2linux(
|
2021-03-02 06:02:27 +00:00
|
|
|
struct FpuState *fs, struct __darwin_x86_float_state64 *xnufs) {
|
2021-02-26 02:30:17 +00:00
|
|
|
fs->cwd = xnufs->__fpu_fcw;
|
|
|
|
|
fs->swd = xnufs->__fpu_fsw;
|
2020-06-15 14:18:57 +00:00
|
|
|
fs->ftw = xnufs->__fpu_ftw;
|
|
|
|
|
fs->fop = xnufs->__fpu_fop;
|
|
|
|
|
fs->rip = xnufs->__fpu_ip;
|
|
|
|
|
fs->rdp = xnufs->__fpu_dp;
|
|
|
|
|
fs->mxcsr = xnufs->__fpu_mxcsr;
|
|
|
|
|
fs->mxcr_mask = xnufs->__fpu_mxcsrmask;
|
2021-07-12 06:17:47 +00:00
|
|
|
CopyFpXmmRegs(fs->st, &xnufs->__fpu_stmm0);
|
2020-06-15 14:18:57 +00:00
|
|
|
}
|
|
|
|
|
|
2022-05-16 20:20:08 +00:00
|
|
|
static privileged void linuxssefpustate2xnu(
|
2021-03-02 06:02:27 +00:00
|
|
|
struct __darwin_x86_float_state64 *xnufs, struct FpuState *fs) {
|
2021-02-26 02:30:17 +00:00
|
|
|
xnufs->__fpu_fcw = fs->cwd;
|
|
|
|
|
xnufs->__fpu_fsw = fs->swd;
|
|
|
|
|
xnufs->__fpu_ftw = fs->ftw;
|
|
|
|
|
xnufs->__fpu_fop = fs->fop;
|
|
|
|
|
xnufs->__fpu_ip = fs->rip;
|
|
|
|
|
xnufs->__fpu_dp = fs->rdp;
|
|
|
|
|
xnufs->__fpu_mxcsr = fs->mxcsr;
|
|
|
|
|
xnufs->__fpu_mxcsrmask = fs->mxcr_mask;
|
2021-07-12 06:17:47 +00:00
|
|
|
CopyFpXmmRegs(&xnufs->__fpu_stmm0, fs->st);
|
2021-02-26 02:30:17 +00:00
|
|
|
}
|
|
|
|
|
|
2023-05-19 02:05:08 +00:00
|
|
|
#endif /* __x86_64__ */
|
|
|
|
|
|
2023-10-10 03:18:48 +00:00
|
|
|
#ifdef __x86_64__
|
2022-05-16 20:20:08 +00:00
|
|
|
privileged void __sigenter_xnu(void *fn, int infostyle, int sig,
|
|
|
|
|
struct siginfo_xnu *xnuinfo,
|
|
|
|
|
struct __darwin_ucontext *xnuctx) {
|
2023-10-10 03:18:48 +00:00
|
|
|
#else
|
|
|
|
|
privileged void __sigenter_xnu(int sig, struct siginfo_xnu *xnuinfo,
|
|
|
|
|
struct __darwin_ucontext *xnuctx) {
|
|
|
|
|
#endif
|
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.
2023-09-19 03:44:45 +00:00
|
|
|
#pragma GCC push_options
|
|
|
|
|
#pragma GCC diagnostic ignored "-Wframe-larger-than="
|
2020-06-15 14:18:57 +00:00
|
|
|
struct Goodies {
|
|
|
|
|
ucontext_t uc;
|
|
|
|
|
siginfo_t si;
|
|
|
|
|
} g;
|
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.
2023-09-19 03:44:45 +00:00
|
|
|
CheckLargeStackAllocation(&g, sizeof(g));
|
|
|
|
|
#pragma GCC pop_options
|
|
|
|
|
int rva, flags;
|
2023-09-10 15:12:43 +00:00
|
|
|
rva = __sighandrvas[sig];
|
2021-02-26 02:30:17 +00:00
|
|
|
if (rva >= kSigactionMinRva) {
|
2023-09-10 15:12:43 +00:00
|
|
|
flags = __sighandflags[sig];
|
2022-04-13 05:11:00 +00:00
|
|
|
if (~flags & SA_SIGINFO) {
|
2023-05-19 02:05:08 +00:00
|
|
|
((sigaction_f)(__executable_start + rva))(sig, 0, 0);
|
2022-04-13 05:11:00 +00:00
|
|
|
} else {
|
2022-05-16 20:20:08 +00:00
|
|
|
__repstosb(&g, 0, sizeof(g));
|
2023-05-19 02:05:08 +00:00
|
|
|
|
2022-04-13 05:11:00 +00:00
|
|
|
if (xnuctx) {
|
Make improvements
- 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.
2023-10-08 12:36:18 +00:00
|
|
|
g.uc.uc_sigmask = xnuctx->uc_sigmask;
|
2022-04-13 05:11:00 +00:00
|
|
|
g.uc.uc_stack.ss_sp = xnuctx->uc_stack.ss_sp;
|
|
|
|
|
g.uc.uc_stack.ss_flags = xnuctx->uc_stack.ss_flags;
|
|
|
|
|
g.uc.uc_stack.ss_size = xnuctx->uc_stack.ss_size;
|
2023-05-19 02:05:08 +00:00
|
|
|
#ifdef __x86_64__
|
2022-04-13 05:11:00 +00:00
|
|
|
g.uc.uc_mcontext.fpregs = &g.uc.__fpustate;
|
|
|
|
|
if (xnuctx->uc_mcontext) {
|
|
|
|
|
if (xnuctx->uc_mcsize >=
|
|
|
|
|
sizeof(struct __darwin_x86_exception_state64)) {
|
|
|
|
|
xnuexceptionstate2linux(&g.uc.uc_mcontext,
|
|
|
|
|
&xnuctx->uc_mcontext->__es);
|
|
|
|
|
}
|
|
|
|
|
if (xnuctx->uc_mcsize >=
|
|
|
|
|
(sizeof(struct __darwin_x86_exception_state64) +
|
|
|
|
|
sizeof(struct __darwin_x86_thread_state64))) {
|
|
|
|
|
xnuthreadstate2linux(&g.uc.uc_mcontext, &xnuctx->uc_mcontext->__ss);
|
|
|
|
|
}
|
|
|
|
|
if (xnuctx->uc_mcsize >= sizeof(struct __darwin_mcontext64)) {
|
|
|
|
|
xnussefpustate2linux(&g.uc.__fpustate, &xnuctx->uc_mcontext->__fs);
|
|
|
|
|
}
|
2021-02-26 02:30:17 +00:00
|
|
|
}
|
2023-05-19 02:05:08 +00:00
|
|
|
#elif defined(__aarch64__)
|
|
|
|
|
if (xnuctx->uc_mcontext) {
|
2023-06-08 12:17:28 +00:00
|
|
|
__memcpy(g.uc.uc_mcontext.regs, &xnuctx->uc_mcontext->__ss.__x,
|
|
|
|
|
33 * 8);
|
2023-05-19 02:05:08 +00:00
|
|
|
}
|
|
|
|
|
#endif /* __x86_64__ */
|
2020-06-15 14:18:57 +00:00
|
|
|
}
|
2023-05-19 02:05:08 +00:00
|
|
|
|
2022-04-13 05:11:00 +00:00
|
|
|
if (xnuinfo) {
|
2022-10-10 14:36:07 +00:00
|
|
|
__siginfo2cosmo(&g.si, (void *)xnuinfo);
|
2022-04-13 05:11:00 +00:00
|
|
|
}
|
2023-05-19 02:05:08 +00:00
|
|
|
((sigaction_f)(__executable_start + rva))(sig, &g.si, &g.uc);
|
|
|
|
|
|
2022-04-13 05:11:00 +00:00
|
|
|
if (xnuctx) {
|
|
|
|
|
xnuctx->uc_stack.ss_sp = g.uc.uc_stack.ss_sp;
|
|
|
|
|
xnuctx->uc_stack.ss_flags = g.uc.uc_stack.ss_flags;
|
|
|
|
|
xnuctx->uc_stack.ss_size = g.uc.uc_stack.ss_size;
|
Make improvements
- 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.
2023-10-08 12:36:18 +00:00
|
|
|
xnuctx->uc_sigmask = g.uc.uc_sigmask;
|
2023-05-19 02:05:08 +00:00
|
|
|
#ifdef __x86_64__
|
2022-04-13 05:11:00 +00:00
|
|
|
if (xnuctx->uc_mcontext) {
|
|
|
|
|
if (xnuctx->uc_mcsize >=
|
|
|
|
|
sizeof(struct __darwin_x86_exception_state64)) {
|
|
|
|
|
linuxexceptionstate2xnu(&xnuctx->uc_mcontext->__es,
|
|
|
|
|
&g.uc.uc_mcontext);
|
|
|
|
|
}
|
|
|
|
|
if (xnuctx->uc_mcsize >=
|
|
|
|
|
(sizeof(struct __darwin_x86_exception_state64) +
|
|
|
|
|
sizeof(struct __darwin_x86_thread_state64))) {
|
|
|
|
|
linuxthreadstate2xnu(&xnuctx->uc_mcontext->__ss, &g.uc,
|
|
|
|
|
&g.uc.uc_mcontext);
|
|
|
|
|
}
|
|
|
|
|
if (xnuctx->uc_mcsize >= sizeof(struct __darwin_mcontext64)) {
|
|
|
|
|
linuxssefpustate2xnu(&xnuctx->uc_mcontext->__fs, &g.uc.__fpustate);
|
|
|
|
|
}
|
2021-02-26 02:30:17 +00:00
|
|
|
}
|
2023-05-19 02:05:08 +00:00
|
|
|
#elif defined(__aarch64__)
|
|
|
|
|
if (xnuctx->uc_mcontext) {
|
2023-06-08 12:17:28 +00:00
|
|
|
__memcpy(&xnuctx->uc_mcontext->__ss.__x, g.uc.uc_mcontext.regs,
|
|
|
|
|
33 * 8);
|
2023-05-19 02:05:08 +00:00
|
|
|
}
|
|
|
|
|
#endif /* __x86_64__ */
|
2021-02-26 02:30:17 +00:00
|
|
|
}
|
2020-06-15 14:18:57 +00:00
|
|
|
}
|
|
|
|
|
}
|
2023-05-19 02:05:08 +00:00
|
|
|
|
|
|
|
|
#ifdef __x86_64__
|
2023-09-02 03:49:13 +00:00
|
|
|
intptr_t ax;
|
2020-06-15 14:18:57 +00:00
|
|
|
asm volatile("syscall"
|
|
|
|
|
: "=a"(ax)
|
|
|
|
|
: "0"(0x20000b8 /* sigreturn */), "D"(xnuctx), "S"(infostyle)
|
|
|
|
|
: "rcx", "r11", "memory", "cc");
|
2022-09-04 03:35:31 +00:00
|
|
|
notpossible;
|
2023-10-10 03:18:48 +00:00
|
|
|
#endif /* __x86_64__ */
|
2020-06-15 14:18:57 +00:00
|
|
|
}
|