34 #include <sys/resource.h>
35 #include <sys/utsname.h>
36 #include <pthread.h>
37 #include <signal.h>
38
39 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
40
41 // Todo: provide a os::get_max_process_id() or similar. Number of processes
42 // may have been configured, can be read more accurately from proc fs etc.
43 #ifndef MAX_PID
44 #define MAX_PID INT_MAX
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 --;
89 } else {
90 stack[frame_idx ++] = fr.pc();
91 }
92 if (fr.fp() == NULL || os::is_first_C_frame(&fr)
93 ||fr.sender_pc() == NULL || fr.cb() != NULL) break;
94
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34 #include <sys/resource.h>
35 #include <sys/utsname.h>
36 #include <pthread.h>
37 #include <signal.h>
38
39 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
40
41 // Todo: provide a os::get_max_process_id() or similar. Number of processes
42 // may have been configured, can be read more accurately from proc fs etc.
43 #ifndef MAX_PID
44 #define MAX_PID INT_MAX
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 char *core_path = (char *)os::malloc(PATH_MAX, mtInternal);
55 if (core_path == NULL) {
56 VMError::report_coredump_status("", false);
57 return;
58 }
59
60 n = get_core_path(core_path, PATH_MAX);
61
62 if (n <= 0) {
63 jio_snprintf(buffer, bufferSize, "core.%d (may not exist)", current_process_id());
64 success = true;
65 #ifdef LINUX
66 } else if (core_path[0] == '"') { // redirect to user process
67 jio_snprintf(buffer, bufferSize, "Core dumps may be processed with %s", core_path);
68 success = true;
69 #endif
70 } else if (getrlimit(RLIMIT_CORE, &rlim) != 0) {
71 jio_snprintf(buffer, bufferSize, "%s (may not exist)", core_path);
72 success = true;
73 } else {
74 switch(rlim.rlim_cur) {
75 case RLIM_INFINITY:
76 jio_snprintf(buffer, bufferSize, "%s", core_path);
77 success = true;
78 break;
79 case 0:
80 jio_snprintf(buffer, bufferSize, "Core dumps have been disabled. To enable core dumping, try \"ulimit -c unlimited\" before starting Java again");
81 success = false;
82 break;
83 default:
84 jio_snprintf(buffer, bufferSize, "%s (max size %lu kB). To ensure a full core dump, try \"ulimit -c unlimited\" before starting Java again", core_path, (unsigned long)(rlim.rlim_cur >> 10));
85 success = true;
86 break;
87 }
88 }
89
90 os::free(core_path);
91 VMError::report_coredump_status(buffer, success);
92 }
93
94 int os::get_native_stack(address* stack, int frames, int toSkip) {
95 #ifdef _NMT_NOINLINE_
96 toSkip++;
97 #endif
98
99 int frame_idx = 0;
100 int num_of_frames; // number of frames captured
101 frame fr = os::current_frame();
102 while (fr.pc() && frame_idx < frames) {
103 if (toSkip > 0) {
104 toSkip --;
105 } else {
106 stack[frame_idx ++] = fr.pc();
107 }
108 if (fr.fp() == NULL || os::is_first_C_frame(&fr)
109 ||fr.sender_pc() == NULL || fr.cb() != NULL) break;
110
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