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Make sure we emit a section for pubnames even if that section is

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going to be empty. This is particularly important for the gnu
pubnames case since we're emitting a relocation to the section.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191915 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2013-10-03 17:41:20 +00:00
parent 7c9fc90c75
commit 45fae28db7
2 changed files with 18 additions and 3 deletions
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3
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -2427,9 +2427,6 @@ void DwarfDebug::emitDebugPubNames(bool GnuStyle) {
CompileUnit *TheCU = I->second;
unsigned ID = TheCU->getUniqueID();
if (TheCU->getGlobalNames().empty())
continue;
// Start the dwarf pubnames section.
Asm->OutStreamer.SwitchSection(PSec);

18
test/DebugInfo/X86/gnu-public-names-empty.ll Normal file
View File

@ -0,0 +1,18 @@
; RUN: llc -mtriple=x86_64-pc-linux-gnu -generate-gnu-dwarf-pub-sections -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s
; Generated from:
; static int a __attribute__((section("a")));
; Check that the attributes in the compile unit both point to a correct
; location, even when nothing is exported.
; CHECK: DW_AT_GNU_pubnames [DW_FORM_sec_offset] (0x00000000)
; CHECK: DW_AT_GNU_pubtypes [DW_FORM_sec_offset] (0x00000000)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3}
!0 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.4 (trunk 191846) (llvm/trunk 191866)", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !2, metadata !2, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ] [/usr/local/google/home/echristo/tmp/foo.c] [DW_LANG_C99]
!1 = metadata !{metadata !"foo.c", metadata !"/usr/local/google/home/echristo/tmp"}
!2 = metadata !{i32 0}
!3 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}