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-rw-r--r--erts/emulator/sys/unix/sys.c82
1 files changed, 58 insertions, 24 deletions
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index 97756e8434..b485dbf784 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -58,7 +58,6 @@
#define __DARWIN__ 1
#endif
-
#ifdef USE_THREADS
#include "erl_threads.h"
#endif
@@ -71,7 +70,6 @@ static erts_smp_rwmtx_t environ_rwmtx;
#define MAX_VSIZE 16 /* Max number of entries allowed in an I/O
* vector sock_sendv().
*/
-
/*
* Don't need global.h, but bif_table.h (included by bif.h),
* won't compile otherwise
@@ -123,6 +121,15 @@ struct ErtsSysReportExit_ {
#endif
};
+/* This data is shared by these drivers - initialized by spawn_init() */
+static struct driver_data {
+ int port_num, ofd, packet_bytes;
+ ErtsSysReportExit *report_exit;
+ int pid;
+ int alive;
+ int status;
+} *driver_data; /* indexed by fd */
+
static ErtsSysReportExit *report_exit_list;
#if CHLDWTHR && !defined(ERTS_SMP)
static ErtsSysReportExit *report_exit_transit_list;
@@ -680,17 +687,40 @@ static RETSIGTYPE break_handler(int sig)
#endif /* 0 */
static ERTS_INLINE void
-prepare_crash_dump(void)
+prepare_crash_dump(int secs)
{
+#define NUFBUF (3)
int i, max;
char env[21]; /* enough to hold any 64-bit integer */
size_t envsz;
+ DeclareTmpHeapNoproc(heap,NUFBUF);
+ Port *heart_port;
+ Eterm *hp = heap;
+ Eterm list = NIL;
+ int heart_fd[2] = {-1,-1};
+
+ UseTmpHeapNoproc(NUFBUF);
if (ERTS_PREPARED_CRASH_DUMP)
return; /* We have already been called */
+ heart_port = erts_get_heart_port();
+ if (heart_port) {
+ /* hearts input fd
+ * We "know" drv_data is the in_fd since the port is started with read|write
+ */
+ heart_fd[0] = (int)heart_port->drv_data;
+ heart_fd[1] = (int)driver_data[heart_fd[0]].ofd;
+
+ list = CONS(hp, make_small(8), list); hp += 2;
+
+ /* send to heart port, CMD = 8, i.e. prepare crash dump =o */
+ erts_write_to_port(ERTS_INVALID_PID, heart_port, list);
+ }
+
/* Make sure we unregister at epmd (unknown fd) and get at least
one free filedescriptor (for erl_crash.dump) */
+
max = max_files;
if (max < 1024)
max = 1024;
@@ -704,11 +734,15 @@ prepare_crash_dump(void)
if (i == async_fd[0] || i == async_fd[1])
continue;
#endif
+ /* We don't want to close our heart yet ... */
+ if (i == heart_fd[0] || i == heart_fd[1])
+ continue;
+
close(i);
}
envsz = sizeof(env);
- i = erts_sys_getenv_raw("ERL_CRASH_DUMP_NICE", env, &envsz);
+ i = erts_sys_getenv__("ERL_CRASH_DUMP_NICE", env, &envsz);
if (i >= 0) {
int nice_val;
nice_val = i != 0 ? 0 : atoi(env);
@@ -717,21 +751,21 @@ prepare_crash_dump(void)
}
erts_silence_warn_unused_result(nice(nice_val));
}
-
- envsz = sizeof(env);
- i = erts_sys_getenv_raw("ERL_CRASH_DUMP_SECONDS", env, &envsz);
- if (i >= 0) {
- unsigned sec;
- sec = (unsigned) i != 0 ? 0 : atoi(env);
- alarm(sec);
- }
+ /* Positive secs means an alarm must be set
+ * 0 or negative means no alarm
+ */
+ if (secs > 0) {
+ alarm((unsigned int)secs);
+ }
+ UnUseTmpHeapNoproc(NUFBUF);
+#undef NUFBUF
}
void
-erts_sys_prepare_crash_dump(void)
+erts_sys_prepare_crash_dump(int secs)
{
- prepare_crash_dump();
+ prepare_crash_dump(secs);
}
static ERTS_INLINE void
@@ -773,7 +807,7 @@ sigusr1_exit(void)
is hung somewhere, so it won't be able to poll any flag we set here.
*/
ERTS_SET_GOT_SIGUSR1;
- prepare_crash_dump();
+ prepare_crash_dump((int)0);
erl_exit(1, "Received SIGUSR1\n");
}
@@ -1021,15 +1055,6 @@ void fini_getenv_state(GETENV_STATE *state)
#define ERTS_SYS_READ_BUF_SZ (64*1024)
-/* This data is shared by these drivers - initialized by spawn_init() */
-static struct driver_data {
- int port_num, ofd, packet_bytes;
- ErtsSysReportExit *report_exit;
- int pid;
- int alive;
- int status;
-} *driver_data; /* indexed by fd */
-
/* Driver interfaces */
static ErlDrvData spawn_start(ErlDrvPort, char*, SysDriverOpts*);
static ErlDrvData fd_start(ErlDrvPort, char*, SysDriverOpts*);
@@ -2419,6 +2444,15 @@ erts_sys_getenv_raw(char *key, char *value, size_t *size) {
return erts_sys_getenv(key, value, size);
}
+/*
+ * erts_sys_getenv
+ * returns:
+ * -1, if environment key is not set with a value
+ * 0, if environment key is set and value fits into buffer size
+ * 1, if environment key is set but does not fit into buffer size
+ * size is set with the needed buffer size value
+ */
+
int
erts_sys_getenv(char *key, char *value, size_t *size)
{