commit bae69f1892b5eee6e2a5af374d524ce3212f0abb
author Christopher Ferris <cferris@google.com> Wed Jun 28 14:51:54 2017 -0700
committer Christopher Ferris <cferris@google.com> Wed Jun 28 15:23:10 2017 -0700
tree f0aa4464e301dfa1b4952656e7aaffe928f4d19a
parent 040212706bdff2efece95f4fc4fd8bee136657d6

Add .gnu_debugdata support.

Update the unwind_info tool to dump all of the sections.

Bug: 23762183

Test: Passes new unit tests.
Change-Id: I8b223bc208a1a2ef06ed333e6d96943c8f273681

libunwindstack/Elf.h

diff --git a/libunwindstack/Elf.h b/libunwindstack/Elf.h
index f9db541..cff9dc4 100644
--- a/libunwindstack/Elf.h
+++ b/libunwindstack/Elf.h
@@ -46,11 +46,15 @@
   }
 
   bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* func_offset) {
-    return valid_ && interface_->GetFunctionName(addr, name, func_offset);
+    return valid_ && (interface_->GetFunctionName(addr, name, func_offset) ||
+                      (gnu_debugdata_interface_ &&
+                       gnu_debugdata_interface_->GetFunctionName(addr, name, func_offset)));
   }
 
   bool Step(uint64_t rel_pc, Regs* regs, Memory* process_memory) {
-    return valid_ && interface_->Step(rel_pc, regs, process_memory);
+    return valid_ && (interface_->Step(rel_pc, regs, process_memory) ||
+                      (gnu_debugdata_interface_ &&
+                       gnu_debugdata_interface_->Step(rel_pc, regs, process_memory)));
   }
 
   ElfInterface* CreateInterfaceFromMemory(Memory* memory);
@@ -65,6 +69,8 @@
 
   ElfInterface* interface() { return interface_.get(); }
 
+  ElfInterface* gnu_debugdata_interface() { return gnu_debugdata_interface_.get(); }
+
   static bool IsValidElf(Memory* memory);
 
  protected:
@@ -73,6 +79,9 @@
   std::unique_ptr<Memory> memory_;
   uint32_t machine_type_;
   uint8_t class_type_;
+
+  std::unique_ptr<Memory> gnu_debugdata_memory_;
+  std::unique_ptr<ElfInterface> gnu_debugdata_interface_;
 };
 
 #endif  // _LIBUNWINDSTACK_ELF_H