manager: add GetMallocInfo() hidden/debug method

Return the output of malloc_info() via a file descriptor (in case it
gets large on a busy system). Useful to get live data about memory
usage when it is not possible to run under a profiler from the get-go.
Do not formally register the method, but add a 'hidden' interface
so that it cannot be seen by introspection or by looking at the
object.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/core/dbus.c b/src/core/dbus.c
index c295e1fbd4..9ce9ddc8f2 100644
--- a/src/core/dbus.c
+++ b/src/core/dbus.c
@@ -737,6 +737,10 @@ static int bus_on_connection(sd_event_source *s, int fd, uint32_t revents, void
                 return 0;
         }
 
+        r = bus_register_malloc_status(bus, "org.freedesktop.systemd1");
+        if (r < 0)
+                log_warning_errno(r, "Failed to register MemoryAllocation1, ignoring: %m");
+
         r = set_ensure_put(&m->private_buses, NULL, bus);
         if (r == -ENOMEM) {
                 log_oom();
@@ -798,6 +802,10 @@ static int bus_setup_api(Manager *m, sd_bus *bus) {
         if (r < 0)
                 return log_error_errno(r, "Failed to request name: %m");
 
+        r = bus_register_malloc_status(bus, "org.freedesktop.systemd1");
+        if (r < 0)
+                log_warning_errno(r, "Failed to register MemoryAllocation1, ignoring: %m");
+
         log_debug("Successfully connected to API bus.");
 
         return 0;