45 #endif
46 #define IS_VALID_PID(p) (p > 0 && p < MAX_PID)
47
48 // Check core dump limit and report possible place where core can be found
49 void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) {
50 int n;
51 struct rlimit rlim;
52 bool success;
53
54 n = get_core_path(buffer, bufferSize);
55
56 if (getrlimit(RLIMIT_CORE, &rlim) != 0) {
57 jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d (may not exist)", current_process_id());
58 success = true;
59 } else {
60 switch(rlim.rlim_cur) {
61 case RLIM_INFINITY:
62 jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d", current_process_id());
63 success = true;
64 break;
65 case 0:
66 jio_snprintf(buffer, bufferSize, "Core dumps have been disabled. To enable core dumping, try \"ulimit -c unlimited\" before starting Java again");
67 success = false;
68 break;
69 default:
70 jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d (max size %lu kB). To ensure a full core dump, try \"ulimit -c unlimited\" before starting Java again", current_process_id(), (unsigned long)(rlim.rlim_cur >> 10));
71 success = true;
72 break;
73 }
74 }
75 VMError::report_coredump_status(buffer, success);
76 }
77
78 int os::get_native_stack(address* stack, int frames, int toSkip) {
79 #ifdef _NMT_NOINLINE_
80 toSkip++;
81 #endif
82
83 int frame_idx = 0;
84 int num_of_frames; // number of frames captured
85 frame fr = os::current_frame();
86 while (fr.pc() && frame_idx < frames) {
87 if (toSkip > 0) {
88 toSkip --;
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45 #endif
46 #define IS_VALID_PID(p) (p > 0 && p < MAX_PID)
47
48 // Check core dump limit and report possible place where core can be found
49 void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) {
50 int n;
51 struct rlimit rlim;
52 bool success;
53
54 n = get_core_path(buffer, bufferSize);
55
56 if (getrlimit(RLIMIT_CORE, &rlim) != 0) {
57 jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d (may not exist)", current_process_id());
58 success = true;
59 } else {
60 switch(rlim.rlim_cur) {
61 case RLIM_INFINITY:
62 jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d", current_process_id());
63 success = true;
64 break;
65
66 case 0:
67 {
68 jio_snprintf(buffer, bufferSize, "Core dumps have been disabled. To enable core dumping, try \"ulimit -c unlimited\" before starting Java again");
69
70 #ifdef LINUX
71 /*
72 * Max length of /proc/sys/kernel/core_pattern is 128 characters.
73 * See https://www.kernel.org/doc/Documentation/sysctl/kernel.txt
74 */
75 const int core_pattern_len = 129;
76
77 char core_pattern[core_pattern_len] = {0};
78 bool is_redirect = false;
79 FILE *core_pattern_file = fopen("/proc/sys/kernel/core_pattern", "r");
80 if(core_pattern_file != NULL){
81 fgets(core_pattern, core_pattern_len, core_pattern_file);
82 fclose(core_pattern_file);
83 is_redirect = core_pattern[0] == '|';
84 }
85
86 if(is_redirect){
87 jio_snprintf(buffer, bufferSize,
88 "Core dumps may be treated with \"%s\"", &core_pattern[1]);
89 }
90 #endif
91
92 success = false;
93 break;
94 }
95
96 default:
97 jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d (max size %lu kB). To ensure a full core dump, try \"ulimit -c unlimited\" before starting Java again", current_process_id(), (unsigned long)(rlim.rlim_cur >> 10));
98 success = true;
99 break;
100 }
101 }
102 VMError::report_coredump_status(buffer, success);
103 }
104
105 int os::get_native_stack(address* stack, int frames, int toSkip) {
106 #ifdef _NMT_NOINLINE_
107 toSkip++;
108 #endif
109
110 int frame_idx = 0;
111 int num_of_frames; // number of frames captured
112 frame fr = os::current_frame();
113 while (fr.pc() && frame_idx < frames) {
114 if (toSkip > 0) {
115 toSkip --;
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