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Make signal handling work well across platforms

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- Fix sigsuspend() on XNU
- Fix strsignal() on non-Linux
- Add unit tests for strsignal()
- Add unit tests for setitimer()
- Add unit tests for sigsuspend()
- Rewrite setitimer() for New Technology
- Rewrite nanosleep() for New Technology
- Polyfill SIGALRM on the New Technology
- select(0,0,0,0) on NT now calls pause()
- Remove some NTDLL calls that aren't needed
- Polyfill SA_NOCLDWAIT on the New Technology
- Polyfill SA_RESETHAND on the New Technology
- Polyfill sigprocmask() on the New Technology
- Polyfill SIGCHLD+SIG_IGN on the New Technology
- Polyfill SA_RESTART masking on the New Technology
- Deliver console signals from main thread on New Technology
- Document SA_RESTART behavior w/ @sarestartable / @norestart
- System call trace in MODE=dbg now prints inherited FDs and signal mask
This commit is contained in:
Justine Tunney 2022-03-25 07:11:44 -07:00
parent 3b9e66ecba
commit 072e1d2910
82 changed files with 1388 additions and 450 deletions
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35
libc/intrin/kprintf.greg.c
View file

@ -276,37 +276,47 @@ privileged static size_t kformat(char *b, size_t n, const char *fmt, va_list va,
switch ((c = *f++)) {
default:
goto EmitFormatByte;
case '\0':
break;
case '.':
pdot = 1;
continue;
case '-':
flip = 1;
continue;
case '#':
hash = '0';
continue;
case '_':
case ',':
case '\'':
quot = c;
continue;
case ' ':
case '+':
sign = c;
continue;
case 'h':
--type;
continue;
case 'j':
case 'l':
case 'z':
++type;
continue;
case '!':
dang = 1;
continue;
case '0':
case '1':
case '2':
@ -321,6 +331,7 @@ privileged static size_t kformat(char *b, size_t n, const char *fmt, va_list va,
si *= 10;
si += c - '0';
goto UpdateCols;
case '*':
si = va_arg(va, int);
UpdateCols:
@ -339,9 +350,11 @@ privileged static size_t kformat(char *b, size_t n, const char *fmt, va_list va,
}
}
continue;
case 'T':
x = ClocksToNanos(ts.start, ts.birth) % 86400000000000;
goto FormatUnsigned;
case 'P':
if (!__vforked) {
x = __pid;
@ -352,6 +365,7 @@ privileged static size_t kformat(char *b, size_t n, const char *fmt, va_list va,
: "rcx", "rdx", "r11", "memory", "cc");
}
goto FormatUnsigned;
case 'u':
case 'd':
if (UNLIKELY(type <= -3)) {
@ -416,6 +430,7 @@ privileged static size_t kformat(char *b, size_t n, const char *fmt, va_list va,
}
}
break;
case 'b':
base = 1;
if (hash) hash = '0' | 'b' << 8;
@ -428,6 +443,7 @@ privileged static size_t kformat(char *b, size_t n, const char *fmt, va_list va,
do z[i++ & 127] = abet[x & m];
while ((x >>= base) || (pdot && i < prec));
goto EmitNumber;
case 'X':
abet = "0123456789ABCDEF";
/* fallthrough */
@ -435,9 +451,11 @@ privileged static size_t kformat(char *b, size_t n, const char *fmt, va_list va,
base = 4;
if (hash) hash = '0' | 'x' << 8;
goto BinaryNumber;
case 'o':
base = 3;
goto BinaryNumber;
case 'p':
x = va_arg(va, intptr_t);
if (!x && pdot) pdot = 0;
@ -448,10 +466,11 @@ privileged static size_t kformat(char *b, size_t n, const char *fmt, va_list va,
hash = '0' | 'x' << 8;
base = 4;
goto FormatNumber;
case 'C':
c = 'c';
type = 1;
/* fallthrough */
// fallthrough
case 'c':
i = 1;
j = 0;
@ -463,9 +482,9 @@ privileged static size_t kformat(char *b, size_t n, const char *fmt, va_list va,
quot = 1;
hash = '\'';
p = kemitquote(p, e, type, hash);
if (cols && type) --cols; /* u/L */
if (cols) --cols; /* start quote */
if (cols) --cols; /* end quote */
if (cols && type) --cols; // u/L
if (cols) --cols; // start quote
if (cols) --cols; // end quote
}
goto EmitChar;
@ -506,7 +525,7 @@ privileged static size_t kformat(char *b, size_t n, const char *fmt, va_list va,
case 'S':
c = 's';
type = 1;
/* fallthrough */
// fallthrough
case 's':
if (!(s = va_arg(va, const void *))) {
s = sign != ' ' ? "NULL" : "";
@ -525,9 +544,9 @@ privileged static size_t kformat(char *b, size_t n, const char *fmt, va_list va,
} else if (hash) {
quot = 1;
hash = '"';
if (cols && type) --cols; /* u/L */
if (cols) --cols; /* start quote */
if (cols) --cols; /* end quote */
if (cols && type) --cols; // u/L
if (cols) --cols; // start quote
if (cols) --cols; // end quote
p = kemitquote(p, e, type, hash);
}
if (sign == ' ' && (!pdot || prec) && *s) {