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-rw-r--r--erts/emulator/sys/ose/sys.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/erts/emulator/sys/ose/sys.c b/erts/emulator/sys/ose/sys.c
index 6e6303820c..f1bac6897a 100644
--- a/erts/emulator/sys/ose/sys.c
+++ b/erts/emulator/sys/ose/sys.c
@@ -370,6 +370,63 @@ thr_create_prepare_child(void *vtcdp)
#endif /* #ifdef USE_THREADS */
+/* The two functions below are stolen from win_con.c
+ They have to use malloc/free/realloc directly becasue
+ we want to do able to do erts_printf very early on.
+ */
+#define VPRINTF_BUF_INC_SIZE 128
+static erts_dsprintf_buf_t *
+grow_vprintf_buf(erts_dsprintf_buf_t *dsbufp, size_t need)
+{
+ char *buf;
+ size_t size;
+
+ ASSERT(dsbufp);
+
+ if (!dsbufp->str) {
+ size = (((need + VPRINTF_BUF_INC_SIZE - 1)
+ / VPRINTF_BUF_INC_SIZE)
+ * VPRINTF_BUF_INC_SIZE);
+ buf = (char *) malloc(size * sizeof(char));
+ }
+ else {
+ size_t free_size = dsbufp->size - dsbufp->str_len;
+
+ if (need <= free_size)
+ return dsbufp;
+
+ size = need - free_size + VPRINTF_BUF_INC_SIZE;
+ size = (((size + VPRINTF_BUF_INC_SIZE - 1)
+ / VPRINTF_BUF_INC_SIZE)
+ * VPRINTF_BUF_INC_SIZE);
+ size += dsbufp->size;
+ buf = (char *) realloc((void *) dsbufp->str,
+ size * sizeof(char));
+ }
+ if (!buf)
+ return NULL;
+ if (buf != dsbufp->str)
+ dsbufp->str = buf;
+ dsbufp->size = size;
+ return dsbufp;
+}
+
+static int erts_sys_ramlog_printf(char *format, va_list arg_list)
+{
+ int res,i;
+ erts_dsprintf_buf_t dsbuf = ERTS_DSPRINTF_BUF_INITER(grow_vprintf_buf);
+ res = erts_vdsprintf(&dsbuf, format, arg_list);
+ if (res >= 0) {
+ for (i = 0; i < dsbuf.str_len; i+= 50)
+ /* We print 50 characters at a time because otherwise
+ the ramlog looks broken */
+ ramlog_printf("%.*s",dsbuf.str_len-50 < 0?dsbuf.str_len:50,dsbuf.str+i);
+ }
+ if (dsbuf.str)
+ free((void *) dsbuf.str);
+ return res;
+}
+
void
erts_sys_pre_init(void)
{
@@ -408,6 +465,9 @@ erts_sys_pre_init(void)
children_died = 0;
#endif
#endif /* USE_THREADS */
+
+ erts_printf_stdout_func = erts_sys_ramlog_printf;
+
erts_smp_atomic_init_nob(&sys_misc_mem_sz, 0);
}