Hi Dave,This patch adds the shared pending signal queue to the private pending signal queue.
With the following small variation on procsig.c, we get this result:
============================================================
crash> sig 5747
PID: 5747 TASK: f7827020 CPU: 1 COMMAND: "procsig"
SIGNAL_STRUCT: f7d71380 COUNT: 1
SIG SIGACTION HANDLER MASK FLAGS
[1] f7833384 SIG_DFL 0000000000000000 0
[...]
[64] f7833870 804867a 0000000000000000 0
SIGPENDING: no
SIGNAL: 0000000200000800
BLOCKED: 8000000200000800
SIGQUEUE: SIG SIGINFO
12 f4d74ed4
34 f4d74e40
SHARED_PENDING
SIGNAL: 8000000000000800
SIGQUEUE: SIG SIGINFO
12 f4d74060
64 f4d740f4
64 f4d74188
============================================================
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <linux/unistd.h>
#ifndef GETTID
pid_t gettid(void) {return syscall(__NR_gettid);}
#endif
#ifndef TKILL
int tkill(pid_t tid, int sig) {return syscall (__NR_tkill,tid,sig); }
#endif
void sigusr2(int sig, siginfo_t *sp, void *uc)
{
}
void sigcatch()
{
struct sigaction sa;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0 ; //SA_SIGINFO;
sa.sa_sigaction = sigusr2;
if (sigaction(SIGUSR2, &sa, NULL)==-1) {
perror("sigaction() - SIGUSR2"); exit(1);
}
if (sigaction(SIGRTMIN, &sa, NULL)==-1) {
perror("sigaction() - SIGRTMIN"); exit(1);
}
if (sigaction(SIGRTMAX, &sa, NULL)==-1) {
perror("sigaction() - SIGRTMAX"); exit(1);
}
}
void sig_block()
{
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGUSR2);
sigaddset(&set, SIGRTMIN);
sigaddset(&set, SIGRTMAX);
if (sigprocmask(SIG_SETMASK, &set,NULL) == -1) {
perror("sigprocmask()"); exit(1);
}
}
void sig_send() {
if(tkill(gettid(), SIGUSR2)==-1){
perror("tkill()"); exit(1);
}
if(tkill(gettid(), SIGRTMIN)==-1){
perror("tkill()"); exit(1);
}
if(kill(getpid(), SIGUSR2)==-1){
perror("tkill()"); exit(1);
}
if(kill(getpid(), SIGRTMAX)==-1){
perror("tkill()"); exit(1);
}
if(kill(getpid(), SIGRTMAX)==-1){
perror("tkill()"); exit(1);
}
}
main(int argc)
{
sigcatch();
sig_block();
sig_send();
pause();
}
Attachment:
sig2.patch
Description: Binary data
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