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Polyfill SIGCHLD on the New Technology

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redbean will now cleanup child processes properly. New accounting
information is available too, such as page faults and memory usage. The
way it works is Cosmopolitan Libc samples the process collection on
entry into read() and poll() to see if SIGCHLD needs to be raised.

This change also fixes an issue with chibicc /tmp cleanup. There was
also a regression in MODE=dbg because STL needed ASAN runtime support.
This commit is contained in:
Justine Tunney 2022-03-22 21:04:08 -07:00
parent c23b6ecc31
commit 393ca4be40
18 changed files with 182 additions and 44 deletions
Download patch file Download diff file Expand all files Collapse all files

12
libc/stdio/mkostempsm.c
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@ -18,9 +18,11 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/calls/calls.h"
#include "libc/calls/strace.internal.h"
#include "libc/errno.h"
#include "libc/rand/lcg.internal.h"
#include "libc/rand/rand.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/temp.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/o.h"
@ -34,9 +36,7 @@ int mkostempsmi(char *tpl, int slen, unsigned flags, uint64_t *rando, int mode,
int openit(const char *file, int flags, ...)) {
size_t len = strlen(tpl);
size_t wildlen = strlen(WILDCARD);
if (len < wildlen || slen > len - wildlen) {
return einval();
}
if (len < wildlen || slen > len - wildlen) return einval();
char *ss = tpl + len - wildlen - slen;
assert(memcmp(ss, WILDCARD, wildlen) == 0);
flags = (flags & ~(flags & O_ACCMODE)) | O_RDWR | O_CREAT | O_EXCL;
@ -76,6 +76,10 @@ static uint64_t g_mkostemps_reseed;
*/
dontdiscard int mkostempsm(char *template, int suffixlen, unsigned flags,
int mode) {
int fd;
if (g_mkostemps_reseed++ % RESEED == 0) g_mkostemps_rand = rand64();
return mkostempsmi(template, suffixlen, flags, &g_mkostemps_rand, mode, open);
fd = mkostempsmi(template, suffixlen, flags, &g_mkostemps_rand, mode, open);
STRACE("mkostempsm([%#s], %'d, %#x, %#o) → %d% m", template, suffixlen, flags,
mode, fd);
return fd;
}