42 #endif
43 #ifdef AIX
44 #include <unistd.h>
45 #endif
46 #ifdef BSD
47 #include <sys/syscall.h>
48 #include <unistd.h>
49 #endif
50
51
52 // handle all synchronous program error signals which may happen during error
53 // reporting. They must be unblocked, caught, handled.
54
55 static const int SIGNALS[] = { SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP }; // add more if needed
56 static const int NUM_SIGNALS = sizeof(SIGNALS) / sizeof(int);
57
58 // Space for our "saved" signal flags and handlers
59 static int resettedSigflags[NUM_SIGNALS];
60 static address resettedSighandler[NUM_SIGNALS];
61
62 static void save_signal(int idx, int sig)
63 {
64 struct sigaction sa;
65 sigaction(sig, NULL, &sa);
66 resettedSigflags[idx] = sa.sa_flags;
67 resettedSighandler[idx] = (sa.sa_flags & SA_SIGINFO)
68 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
69 : CAST_FROM_FN_PTR(address, sa.sa_handler);
70 }
71
72 int VMError::get_resetted_sigflags(int sig) {
73 for (int i = 0; i < NUM_SIGNALS; i++) {
74 if (SIGNALS[i] == sig) {
75 return resettedSigflags[i];
76 }
77 }
78 return -1;
79 }
80
81 address VMError::get_resetted_sighandler(int sig) {
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42 #endif
43 #ifdef AIX
44 #include <unistd.h>
45 #endif
46 #ifdef BSD
47 #include <sys/syscall.h>
48 #include <unistd.h>
49 #endif
50
51
52 // handle all synchronous program error signals which may happen during error
53 // reporting. They must be unblocked, caught, handled.
54
55 static const int SIGNALS[] = { SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP }; // add more if needed
56 static const int NUM_SIGNALS = sizeof(SIGNALS) / sizeof(int);
57
58 // Space for our "saved" signal flags and handlers
59 static int resettedSigflags[NUM_SIGNALS];
60 static address resettedSighandler[NUM_SIGNALS];
61
62 // Needed for cancelable steps.
63 static volatile pthread_t reporter_thread_id;
64
65 void VMError::reporting_started() {
66 // record pthread id of reporter thread.
67 reporter_thread_id = ::pthread_self();
68 }
69
70 void VMError::interrupt_reporting_thread() {
71 // We misuse SIGILL here, but it does not really matter. We need
72 // a signal which is handled by crash_handler and not likely to
73 // occurr during error reporting itself.
74 ::pthread_kill(reporter_thread_id, SIGILL);
75 }
76
77 static void save_signal(int idx, int sig)
78 {
79 struct sigaction sa;
80 sigaction(sig, NULL, &sa);
81 resettedSigflags[idx] = sa.sa_flags;
82 resettedSighandler[idx] = (sa.sa_flags & SA_SIGINFO)
83 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
84 : CAST_FROM_FN_PTR(address, sa.sa_handler);
85 }
86
87 int VMError::get_resetted_sigflags(int sig) {
88 for (int i = 0; i < NUM_SIGNALS; i++) {
89 if (SIGNALS[i] == sig) {
90 return resettedSigflags[i];
91 }
92 }
93 return -1;
94 }
95
96 address VMError::get_resetted_sighandler(int sig) {
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