[PATCH] D48271: [llvm-readobj] Fix printing format

[Paul Semel via Phabricator via llvm-commits]

paulsemel updated this revision to Diff 154839.
paulsemel added a comment.

Rebased the failing version.


Repository:
  rL LLVM

https://reviews.llvm.org/D48271

Files:
  test/tools/llvm-readobj/print-section.test
  tools/llvm-readobj/ELFDumper.cpp


Index: tools/llvm-readobj/ELFDumper.cpp
===================================================================
--- tools/llvm-readobj/ELFDumper.cpp
+++ tools/llvm-readobj/ELFDumper.cpp
@@ -3275,6 +3275,11 @@
   }
 }
 
+void printAsPrintable(raw_ostream &W, StringRef S) {
+  for (char C : S)
+    W << (isprint(C) ? C : '.');
+}
+
 template <class ELFT>
 void GNUStyle<ELFT>::printSectionAsString(const ELFO *Obj,
                                          StringRef SectionName) {
@@ -3298,8 +3303,9 @@
       CurrentWord++;
       continue;
     }
-    OS << format("[%6tx]", CurrentWord - SecContent);
-    OS << format(" %.*s\n", WordSize, CurrentWord);
+    OS << format("[%6tx]  ", CurrentWord - SecContent);
+    printAsPrintable(OS, StringRef(CurrentWord, WordSize));
+    OS << '\n';
     CurrentWord += WordSize + 1;
   }
   OS.flush();
@@ -4361,8 +4367,9 @@
     W.startLine() << "["
                   << to_string(
                          format_hex_no_prefix((CurrentWord - SecContent), 6))
-                  << "]";
-    W.startLine() << format(" %.*s\n", WordSize, CurrentWord);
+                  << "]  ";
+    printAsPrintable(W.startLine(), StringRef(CurrentWord, WordSize));
+    W.startLine() << '\n';
     CurrentWord += WordSize + 1;
   }
 }
Index: test/tools/llvm-readobj/print-section.test
===================================================================
--- /dev/null
+++ test/tools/llvm-readobj/print-section.test
@@ -0,0 +1,8 @@
+RUN: llvm-readobj -p .text %p/Inputs/elf-groups.x86_64 \
+RUN:     | FileCheck %s
+
+CHECK: [000000]  UH..H....E.
+CHECK: [00000f]  .E.x.E..
+CHECK: [00001a]  ..}..
+CHECK: [000023]  .}..
+CHECK: [00002b]  1.H...].


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