[PATCH] D38491: [ELF] Decompress debug info sections early
Shoaib Meenai via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Oct 3 09:03:42 PDT 2017
smeenai updated this revision to Diff 117538.
smeenai added a comment.
Ensure section is compressed
https://reviews.llvm.org/D38491
Files:
ELF/GdbIndex.cpp
test/ELF/compressed-debug-conflict.s
Index: test/ELF/compressed-debug-conflict.s
===================================================================
--- /dev/null
+++ test/ELF/compressed-debug-conflict.s
@@ -0,0 +1,29 @@
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple i686-linux-gnu -compress-debug-sections=zlib %s -o %t.o
+# RUN: llvm-readobj -sections %t.o | FileCheck -check-prefix=OBJ %s
+# RUN: not ld.lld %t.o %t.o -o %tout 2>&1 | FileCheck -check-prefix=ERROR %s
+
+# OBJ: Sections [
+# OBJ: Section {
+# OBJ: Index: 3
+# OBJ-NEXT: Name: .debug_line (16)
+# OBJ-NEXT: Type: SHT_PROGBITS (0x1)
+# OBJ-NEXT: Flags [ (0x800)
+# OBJ-NEXT: SHF_COMPRESSED (0x800)
+# OBJ-NEXT: ]
+
+# ERROR: error: duplicate symbol: main
+# ERROR-NEXT: >>> defined at reduced.c:2 (/tmp/reduced.c:2)
+# ERROR-NEXT: >>>
+# ERROR-NEXT: >>> defined at reduced.c:2 (/tmp/reduced.c:2)
+# ERROR-NEXT: >>>
+
+ .text
+ .file "reduced.c"
+ .globl main
+main:
+ .file 1 "/tmp" "reduced.c"
+ .loc 1 2 0
+ xorl %eax, %eax
+ retl
+ .file 2 "/tmp/repeat/repeat/repeat/repeat" "repeat.h"
Index: ELF/GdbIndex.cpp
===================================================================
--- ELF/GdbIndex.cpp
+++ ELF/GdbIndex.cpp
@@ -17,6 +17,7 @@
#include "GdbIndex.h"
#include "Memory.h"
#include "llvm/DebugInfo/DWARF/DWARFDebugPubTable.h"
+#include "llvm/Object/Decompressor.h"
#include "llvm/Object/ELFObjectFile.h"
using namespace llvm;
@@ -33,6 +34,8 @@
.Case(".debug_ranges", &RangeSection)
.Case(".debug_line", &LineSection)
.Default(nullptr)) {
+ if (Decompressor::isCompressedELFSection(Sec->Flags, Sec->Name))
+ Sec->uncompress();
M->Data = toStringRef(Sec->Data);
M->Sec = Sec;
continue;
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