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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

21
libc/calls/wait4-nt.c
View file

@ -33,6 +33,7 @@
#include "libc/nt/struct/filetime.h"
#include "libc/nt/struct/processmemorycounters.h"
#include "libc/nt/synchronization.h"
#include "libc/rand/lcg.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/o.h"
@ -45,10 +46,14 @@ textwindows int sys_wait4_nt(int pid, int *opt_out_wstatus, int options,
int64_t handle;
int64_t handles[64];
uint32_t dwExitCode;
uint32_t i, count, timeout;
uint32_t i, j, base, count, timeout;
struct NtProcessMemoryCountersEx memcount;
struct NtFileTime createfiletime, exitfiletime, kernelfiletime, userfiletime;
if (pid != -1) {
if (pid != -1 && pid != 0) {
if (pid < 0) {
/* XXX: this is sloppy */
pid = -pid;
}
if (!__isfdkind(pid, kFdProcess)) {
/* XXX: this is sloppy (see fork-nt.c) */
if (!__isfdopen(pid) &&
@ -70,16 +75,8 @@ textwindows int sys_wait4_nt(int pid, int *opt_out_wstatus, int options,
pids[0] = pid;
count = 1;
} else {
for (count = 0, i = g_fds.n; i--;) {
if (g_fds.p[i].kind == kFdProcess) {
pids[count] = i;
handles[count] = g_fds.p[i].handle;
if (++count == ARRAYLEN(handles)) break;
}
}
if (!count) {
return echild();
}
count = __sample_pids(pids, handles);
if (!count) return echild();
}
for (;;) {
dwExitCode = kNtStillActive;