Use zlib to uncompress debug sections in DWARF parser.

This makes llvm-dwarfdump and llvm-symbolizer understand
debug info sections compressed by ld.gold linker.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180088 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 36 insertions, 0 deletions

diff --git a/test/DebugInfo/Inputs/dwarfdump-test-zlib.cc b/test/DebugInfo/Inputs/dwarfdump-test-zlib.cc
new file mode 100644
index 0000000..260c3c4
--- /dev/null
+++ b/test/DebugInfo/Inputs/dwarfdump-test-zlib.cc
@@ -0,0 +1,24 @@
+class DummyClass {
+  int a_;
+ public:
+  DummyClass(int a) : a_(a) {}
+  int add(int b) {
+    return a_ + b;
+  }
+};
+
+int f(int a, int b) {
+  DummyClass c(a);
+  return c.add(b);
+}
+
+int main() {
+  return f(2, 3);
+}
+
+// Built with Clang 3.2 and ld.gold linker:
+// $ mkdir -p /tmp/dbginfo
+// $ cp dwarfdump-test-zlib.cc /tmp/dbginfo
+// $ cd /tmp/dbginfo
+// $ clang++ -g dwarfdump-test-zlib.cc -Wl,--compress-debug-sections=zlib \
+//   -o <output>
diff --git a/test/DebugInfo/Inputs/dwarfdump-test-zlib.elf-x86-64 b/test/DebugInfo/Inputs/dwarfdump-test-zlib.elf-x86-64
new file mode 100755
index 0000000..16b3153
--- /dev/null
+++ b/test/DebugInfo/Inputs/dwarfdump-test-zlib.elf-x86-64
diff --git a/test/DebugInfo/dwarfdump-zlib.test b/test/DebugInfo/dwarfdump-zlib.test
new file mode 100644
index 0000000..8ce2cf7
--- /dev/null
+++ b/test/DebugInfo/dwarfdump-zlib.test
@@ -0,0 +1,12 @@
+REQUIRES: zlib
+
+RUN: llvm-dwarfdump %p/Inputs/dwarfdump-test-zlib.elf-x86-64  \
+RUN:   | FileCheck %s -check-prefix FULLDUMP
+RUN: llvm-dwarfdump %p/Inputs/dwarfdump-test-zlib.elf-x86-64  \
+RUN:   --address=0x400559 --functions | FileCheck %s -check-prefix MAIN
+
+FULLDUMP: .debug_abbrev contents
+FULLDUMP: .debug_info contents
+
+MAIN: main
+MAIN-NEXT: /tmp/dbginfo{{[/\\]}}dwarfdump-test-zlib.cc:16