Consider exec and exit events an end of outstanding calls

- This cleans up a lot of stuff.  The actual substance is addition of
  account_current_callstack in handle_event.c (which however uses
  those cleaned-up interfaces).

- trace-exec.exp was extended to check that the exec syscall can be
  seen in -c output.  That's one of the symptoms of what this fixes.

- This hides dict_opt_c in summary.c.  It also gets rid of the global
  variable current_time_spent--instead, the information is passed via
  a function argument in a struct timedelta (so that we never confuse
  absolute time with relative).  callstack_element.time_spent was renamed
  to .enter_time, as that is what it has always been.

1 files changed, 3 insertions, 2 deletions

diff --git a/libltrace.c b/libltrace.c
index 2d910a1..0112c9f 100644
--- a/libltrace.c
+++ b/libltrace.c
@@ -32,11 +32,12 @@
 #include <string.h>
 #include <unistd.h>
 
+#include "backend.h"
 #include "common.h"
 #include "proc.h"
-#include "read_config_file.h"
-#include "backend.h"
 #include "prototype.h"
+#include "read_config_file.h"
+#include "summary.h"
 
 char *command = NULL;