[Crash-utility] shared pending signal queue added to sig command

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(); }