[PATCH] D158004: llvm-nm ignore the Import symbol file for the --export-symbol option.

[Digger Lin via Phabricator via llvm-commits]

DiggerLin updated this revision to Diff 554356.
DiggerLin marked 3 inline comments as done.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158004/new/

https://reviews.llvm.org/D158004

Files:
  llvm/test/tools/llvm-nm/XCOFF/export-symbols.test
  llvm/tools/llvm-nm/llvm-nm.cpp


Index: llvm/tools/llvm-nm/llvm-nm.cpp
===================================================================
--- llvm/tools/llvm-nm/llvm-nm.cpp
+++ llvm/tools/llvm-nm/llvm-nm.cpp
@@ -2262,6 +2262,14 @@
   if (error(BufferOrErr.getError(), Filename))
     return SymbolList;
 
+  // Ignore AIX linker import files (these files start with "#!"), when
+  // exporting symbols.
+  const char *BuffStart = (*BufferOrErr)->getBufferStart();
+  size_t BufferSize = (*BufferOrErr)->getBufferSize();
+  if (ExportSymbols && BufferSize >= 2 && BuffStart[0] == '#' &&
+      BuffStart[1] == '!')
+    return SymbolList;
+
   LLVMContext Context;
   LLVMContext *ContextPtr = NoLLVMBitcode ? nullptr : &Context;
   Expected<std::unique_ptr<Binary>> BinaryOrErr =
Index: llvm/test/tools/llvm-nm/XCOFF/export-symbols.test
===================================================================
--- llvm/test/tools/llvm-nm/XCOFF/export-symbols.test
+++ llvm/test/tools/llvm-nm/XCOFF/export-symbols.test
@@ -52,6 +52,10 @@
 # RUN: yaml2obj -DFLAG=0x2000 --docnum=2 %s -o %t_shared.o
 # RUN: llvm-nm --export-symbols %t_shared.o | count 0
 
+## Test that llvm-nm ignores AIX linker import files when using --export-symbols. These start with "#!".
+# RUN: echo -e "#!\n bar\n foo " > %t_imp.txt
+# RUN: llvm-nm --export-symbols %t_imp.txt 2>&1 | count 0 
+
 --- !XCOFF
 FileHeader:
   MagicNumber:       0x1DF


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D158004.554356.patch
Type: text/x-patch
Size: 1385 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20230829/d810489e/attachment.bin>