ada: Add Dump_Buffers hooks for code coverage

The purpose of this patch is to make it possible to set up code
coverage for the GNAT front end in gnat1 using GNATcoverage. It is
not obvious how to have GNATcoverage instrument gnat1's main function,
and since the front end has a clear entry point (Gnat1drv), we add
manual instrumentation annotations there.

gcc/ada/

	* gnat1drv.adb (Gnat1drv): Add coverage instrumentation
	annotations.

1 files changed, 7 insertions, 0 deletions

diff --git a/gcc/ada/gnat1drv.adb b/gcc/ada/gnat1drv.adb
index 754dab8..9743dfd 100644
--- a/gcc/ada/gnat1drv.adb
+++ b/gcc/ada/gnat1drv.adb
@@ -1526,6 +1526,8 @@ begin
             Check_Rep_Info;
          end if;
 
+         pragma Annotate (Xcov, Dump_Buffers);
+
          return;
       end if;
 
@@ -1679,6 +1681,8 @@ begin
       Atree.Print_Statistics;
    end if;
 
+   pragma Annotate (Xcov, Dump_Buffers);
+
 --  The outer exception handler handles an unrecoverable error
 
 exception
@@ -1693,6 +1697,9 @@ exception
       Set_Standard_Output;
       Source_Dump;
       Tree_Dump;
+
+      pragma Annotate (Xcov, Dump_Buffers);
+
       Exit_Program (E_Errors);
 
 end Gnat1drv;