[PATCH] D68758: Improve error message for bad SHF_MERGE sections
Rui Ueyama via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed Oct 9 21:25:53 PDT 2019
ruiu created this revision.
ruiu added reviewers: MaskRay, grimar.
Herald added subscribers: arichardson, emaste.
Herald added a reviewer: espindola.
Herald added a project: LLVM.
This patch adds a section name to error messages.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D68758
Files:
lld/ELF/InputFiles.cpp
lld/ELF/InputFiles.h
lld/test/ELF/merge-bad-input1.s
lld/test/ELF/merge-bad-input2.s
Index: lld/test/ELF/merge-bad-input2.s
===================================================================
--- /dev/null
+++ lld/test/ELF/merge-bad-input2.s
@@ -0,0 +1,8 @@
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
+# RUN: not ld.lld %t.o -o /dev/null 2>&1 | FileCheck %s
+
+# CHECK: merge-bad-input2.s.tmp.o:(.foo): writable SHF_MERGE section is not supported
+
+.section .foo,"awM", at progbits,1
+.zero 16
Index: lld/test/ELF/merge-bad-input1.s
===================================================================
--- /dev/null
+++ lld/test/ELF/merge-bad-input1.s
@@ -0,0 +1,9 @@
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
+# RUN: not ld.lld %t.o -o /dev/null 2>&1 | FileCheck %s
+
+# CHECK: merge-bad-input1.s.tmp.o:(.foo): SHF_MERGE section size must be a multiple of sh_entsize
+
+.section .foo,"aM", at progbits,16
+.align 16
+.zero 24
Index: lld/ELF/InputFiles.h
===================================================================
--- lld/ELF/InputFiles.h
+++ lld/ELF/InputFiles.h
@@ -259,7 +259,7 @@
InputSectionBase *createInputSection(const Elf_Shdr &sec);
StringRef getSectionName(const Elf_Shdr &sec);
- bool shouldMerge(const Elf_Shdr &sec);
+ bool shouldMerge(const Elf_Shdr &sec, StringRef name);
// Each ELF symbol contains a section index which the symbol belongs to.
// However, because the number of bits dedicated for that is limited, a
Index: lld/ELF/InputFiles.cpp
===================================================================
--- lld/ELF/InputFiles.cpp
+++ lld/ELF/InputFiles.cpp
@@ -483,7 +483,8 @@
return signature;
}
-template <class ELFT> bool ObjFile<ELFT>::shouldMerge(const Elf_Shdr &sec) {
+template <class ELFT>
+bool ObjFile<ELFT>::shouldMerge(const Elf_Shdr &sec, StringRef name) {
// On a regular link we don't merge sections if -O0 (default is -O1). This
// sometimes makes the linker significantly faster, although the output will
// be bigger.
@@ -515,14 +516,15 @@
if (entSize == 0)
return false;
if (sec.sh_size % entSize)
- fatal(toString(this) +
- ": SHF_MERGE section size must be a multiple of sh_entsize");
+ fatal(toString(this) + ":(" + name +
+ "): SHF_MERGE section size must be a multiple of sh_entsize");
uint64_t flags = sec.sh_flags;
if (!(flags & SHF_MERGE))
return false;
if (flags & SHF_WRITE)
- fatal(toString(this) + ": writable SHF_MERGE section is not supported");
+ fatal(toString(this) + ":(" + name +
+ "): writable SHF_MERGE section is not supported");
return true;
}
@@ -1033,7 +1035,7 @@
if (name == ".eh_frame" && !config->relocatable)
return make<EhInputSection>(*this, sec, name);
- if (shouldMerge(sec))
+ if (shouldMerge(sec, name))
return make<MergeInputSection>(*this, sec, name);
return make<InputSection>(*this, sec, name);
}
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