[Object/ELF] - Do not crash if string table sh_size is equal to zero.
Revealed using "id_000038,sig_11,src_000015,op_havoc,rep_16" from PR30540,
when sh_size was 0, crash happened.
Differential revision: https://reviews.llvm.org/D25091
llvm-svn: 285282
diff --git a/llvm/test/Object/Inputs/invalid-strtab-zero-size.elf b/llvm/test/Object/Inputs/invalid-strtab-zero-size.elf
new file mode 100644
index 0000000..cb0d0d0
--- /dev/null
+++ b/llvm/test/Object/Inputs/invalid-strtab-zero-size.elf
Binary files differ
diff --git a/llvm/test/Object/invalid.test b/llvm/test/Object/invalid.test
index fda5d6d..3529179 100644
--- a/llvm/test/Object/invalid.test
+++ b/llvm/test/Object/invalid.test
@@ -1,6 +1,7 @@
RUN: not llvm-dwarfdump %p/Inputs/invalid-bad-rel-type.elf 2>&1 | FileCheck %s
RUN: not llvm-objdump -s %p/Inputs/invalid-strtab-type.elf 2>&1 | FileCheck %s
RUN: not llvm-objdump -s %p/Inputs/invalid-strtab-size.elf 2>&1 | FileCheck %s
+RUN: not llvm-objdump -s %p/Inputs/invalid-strtab-zero-size.elf 2>&1 | FileCheck %s
CHECK: Invalid data was encountered while parsing the file
RUN: not llvm-objdump -s %p/Inputs/invalid-strtab-non-null.elf 2>&1 | FileCheck --check-prefix=NON-NULL %s