mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-26 22:38:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Introduce cosmo_futex_wait and cosmo_futex_wake

Browse source 
Cosmopolitan Futexes are now exposed as a public API.
This commit is contained in:
Justine Tunney 2024-11-22 11:08:29 -08:00
parent 729f7045e3
commit 9ddbfd921e
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
66 changed files with 886 additions and 917 deletions
Download patch file Download diff file Expand all files Collapse all files

116
libc/intrin/sigcrashsig.c Normal file
View file

@ -0,0 +1,116 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2024 Justine Alexandra Roberts Tunney │
│ │
│ 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. │
│ │
│ 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. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/sig.internal.h"
#include "libc/intrin/pushpop.h"
#include "libc/macros.h"
#include "libc/nt/enum/signal.h"
#include "libc/nt/enum/status.h"
#include "libc/nt/struct/ntexceptionpointers.h"
// this is all a mandatory dependency of winmain
// so, we trade away maintanibility for tininess
// see libc/sysv/consts.sh for canonical magnums
#define SIGILL_ 4
#define SIGTRAP_ 5
#define SIGABRT_ 6
#define SIGFPE_ 8
#define SIGSEGV_ 11
#define SIGSYS_ 31
#define TRAP_BRKPT_ 1
#define ILL_ILLOPC_ 1
#define ILL_PRVOPC_ 5
#define SEGV_MAPERR_ 1
#define SEGV_ACCERR_ 2
#define SI_USER_ 0
#define FPE_FLTDIV_ 3
#define FPE_FLTOVF_ 4
#define FPE_INTOVF_ 2
#define FPE_FLTUND_ 5
#define FPE_FLTRES_ 6
#define FPE_FLTINV_ 7
#define SI_KERNEL_ 128
#define LO(x) (x & 255)
#define HI(x) ((x >> 24) / !(x & 0x00ffff00u))
#define ROW(x, sic, sig) \
{ \
{ \
{ \
LO(x), HI(x), sic / !(sic & 0xffffff00), sig / !(sig & 0xffffff00) \
} \
} \
}
struct CrashSig {
union {
struct {
unsigned char lo;
unsigned char hi;
unsigned char sic;
unsigned char sig;
};
unsigned word;
};
};
static const struct CrashSig kNtCrashSigs[] = {
ROW(kNtSignalBreakpoint, TRAP_BRKPT_, SIGTRAP_), //
ROW(kNtSignalIllegalInstruction, ILL_ILLOPC_, SIGILL_), //
ROW(kNtSignalPrivInstruction, ILL_PRVOPC_, SIGILL_), //
ROW(kNtSignalInPageError, SEGV_MAPERR_, SIGSEGV_), //
ROW(kNtStatusStackOverflow, SEGV_MAPERR_, SIGSEGV_), //
ROW(kNtSignalGuardPage, SEGV_ACCERR_, SIGSEGV_), //
ROW(kNtSignalAccessViolation, SEGV_ACCERR_, SIGSEGV_), //
ROW(kNtSignalInvalidHandle, SI_USER_, SIGABRT_), //
ROW(kNtSignalInvalidParameter, SI_USER_, SIGABRT_), //
ROW(kNtStatusIntegerOverflow, FPE_INTOVF_, SIGFPE_), //
ROW(kNtSignalFltDivideByZero, FPE_FLTDIV_, SIGFPE_), //
ROW(kNtSignalFltOverflow, FPE_FLTOVF_, SIGFPE_), //
ROW(kNtSignalFltUnderflow, FPE_FLTUND_, SIGFPE_), //
ROW(kNtSignalFltInexactResult, FPE_FLTRES_, SIGFPE_), //
ROW(kNtSignalFltDenormalOperand, FPE_FLTINV_, SIGFPE_), //
ROW(kNtSignalFltInvalidOperation, FPE_FLTINV_, SIGFPE_), //
ROW(kNtSignalFltStackCheck, FPE_FLTINV_, SIGFPE_), //
ROW(kNtSignalIntegerDivideByZero, FPE_FLTINV_, SIGFPE_), //
// ROW(kNtSignalAssertionFailure, SI_USER_, SIGABRT_),
// ROW(kNtSignalFloatMultipleTraps, FPE_FLTINV_, SIGFPE_),
// ROW(kNtSignalFloatMultipleFaults, FPE_FLTINV_, SIGFPE_),
// ROW(kNtSignalDllNotFound, SI_KERNEL_, SIGSYS_),
// ROW(kNtSignalOrdinalNotFound, SI_KERNEL_, SIGSYS_),
// ROW(kNtSignalEntrypointNotFound, SI_KERNEL_, SIGSYS_),
// ROW(kNtSignalDllInitFailed, SI_KERNEL_, SIGSYS_),
};
textwindows dontinstrument int __sig_crash_sig(unsigned exception, int *code) {
for (int i = 0; i < ARRAYLEN(kNtCrashSigs); ++i) {
struct CrashSig cs;
cs.word = kNtCrashSigs[i].word;
unsigned lo = cs.lo;
unsigned hi = cs.hi;
unsigned ec = lo | hi << 24;
if (ec == exception) {
*code = cs.sic;
return cs.sig;
}
}
*code = exception;
return SIGSEGV_;
}