Add d_main_name to set the logical entry point for D programs.

gdb/ChangeLog:
2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>

    * d-lang.h (d_main_name): Add declaration.
    * d-lang.c (d_main_name): New function.
    * symtab.c (find_main_name): Add call to d_main_name.

1 files changed, 21 insertions, 0 deletions

diff --git a/gdb/d-lang.c b/gdb/d-lang.c
index 766b5fa81b0..b6938290846 100644
--- a/gdb/d-lang.c
+++ b/gdb/d-lang.c
@@ -29,6 +29,27 @@
 
 #include <ctype.h>
 
+/* The name of the symbol to use to get the name of the main subprogram.  */
+static const char D_MAIN[] = "D main";
+
+/* Function returning the special symbol name used by D for the main
+   procedure in the main program if it is found in minimal symbol list.
+   This function tries to find minimal symbols so that it finds them even
+   if the program was compiled without debugging information.  */
+
+const char *
+d_main_name (void)
+{
+  struct minimal_symbol *msym;
+
+  msym = lookup_minimal_symbol (D_MAIN, NULL, NULL);
+  if (msym != NULL)
+    return D_MAIN;
+
+  /* No known entry procedure found, the main program is probably not D.  */
+  return NULL;
+}
+
 /* Extract identifiers from MANGLED_STR and append it to TEMPBUF.
    Return 1 on success or 0 on failure.  */
 static int