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* [gcc r12-3741] [Ada] Small optimization to DWARF 5 mode in System.Dwarf_Line
@ 2021-09-21 15:27 Pierre-Marie de Rodat
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From: Pierre-Marie de Rodat @ 2021-09-21 15:27 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:97a5ed2071fffe85ee1a07e0655740162e4cce64
commit r12-3741-g97a5ed2071fffe85ee1a07e0655740162e4cce64
Author: Eric Botcazou <ebotcazou@adacore.com>
Date: Tue Jul 6 16:47:31 2021 +0200
[Ada] Small optimization to DWARF 5 mode in System.Dwarf_Line
gcc/ada/
* libgnat/s-dwalin.adb (To_File_Name): Fetch only the last string
from the .debug_line_str section.
(Symbolic_Address.Set_Result): Likewise.
Diff:
---
gcc/ada/libgnat/s-dwalin.adb | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/gcc/ada/libgnat/s-dwalin.adb b/gcc/ada/libgnat/s-dwalin.adb
index 74700e68bfc..4bcd741c92c 100644
--- a/gcc/ada/libgnat/s-dwalin.adb
+++ b/gcc/ada/libgnat/s-dwalin.adb
@@ -957,8 +957,10 @@ package body System.Dwarf_Lines is
when DW_FORM_line_strp =>
Read_Section_Offset (C.Lines, Off, C.Header.Is64);
- Seek (C.Line_Str, Off);
- Read_C_String (C.Line_Str, Buf);
+ if J = File then
+ Seek (C.Line_Str, Off);
+ Read_C_String (C.Line_Str, Buf);
+ end if;
when others =>
raise Dwarf_Error with "DWARF form not implemented";
@@ -1674,8 +1676,10 @@ package body System.Dwarf_Lines is
when DW_FORM_line_strp =>
Read_Section_Offset (C.Lines, Off, C.Header.Is64);
- Seek (C.Line_Str, Off);
- File_Name := Read_C_String (C.Line_Str);
+ if J = Match.File then
+ Seek (C.Line_Str, Off);
+ File_Name := Read_C_String (C.Line_Str);
+ end if;
when others =>
raise Dwarf_Error with "DWARF form not implemented";
@@ -1718,8 +1722,10 @@ package body System.Dwarf_Lines is
when DW_FORM_line_strp =>
Read_Section_Offset (C.Lines, Off, C.Header.Is64);
- Seek (C.Line_Str, Off);
- Dir_Name := Read_C_String (C.Line_Str);
+ if J = Dir_Idx then
+ Seek (C.Line_Str, Off);
+ Dir_Name := Read_C_String (C.Line_Str);
+ end if;
when others =>
raise Dwarf_Error with "DWARF form not implemented";
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