From: Nick Clifton <nickc@redhat.com>
Date: Tue, 10 Oct 2017 12:37:58 +0000 (+0100)
Subject: Improve the speed of the --dwarf-start option by skipping processing of any comp... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ae7e78255666733d238e676a0bab14986a1483dd;p=binutils-gdb.git

Improve the speed of the --dwarf-start option by skipping processing of any comp unit that ends before the specified start address.

	PR 22249
	* dwarf.c (process_debug_info): Skip any comp unit that ends
	before dwarf_start_die.
---

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index ca4990ea077..9f2e5f0a61c 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,9 @@
+2017-10-10  Tom Tromey  <tromey@sourceware.org>
+
+	PR 22249
+	* dwarf.c (process_debug_info): Skip any comp unit that ends
+	before dwarf_start_die.
+
 2017-10-06  Alan Modra  <amodra@gmail.com>
 
 	* dwarf.c (process_debug_info): Consolidate header length checks.
diff --git a/binutils/dwarf.c b/binutils/dwarf.c
index 91f95ff0682..2506d533b69 100644
--- a/binutils/dwarf.c
+++ b/binutils/dwarf.c
@@ -2667,6 +2667,14 @@ process_debug_info (struct dwarf_section *section,
 	  SAFE_BYTE_GET_AND_INC (type_offset, hdrptr, offset_size, end);
 	}
 
+      if (dwarf_start_die > (cu_offset + compunit.cu_length
+			     + initial_length_size))
+	{
+	  start = section_begin + cu_offset + compunit.cu_length
+	    + initial_length_size;
+	  continue;
+	}
+
       if ((do_loc || do_debug_loc || do_debug_ranges)
 	  && num_debug_info_entries == 0
 	  && ! do_types)