commit aae859cc3ca127d890e853cbf12b731e05624a22
author Dmitriy Ivanov <dimitry@google.com> Tue Mar 31 11:14:03 2015 -0700
committer Dimitry Ivanov <dimitry@google.com> Mon Apr 06 21:15:43 2015 +0000
tree 159e996dd6756b99fe70371e99a69ec6040e851b
parent e686df8d839216460f02cf7db6c4e26a13e49afd

Add realpath for soinfo

  This change adds realpath to soinfo and
  extends limit on filenames from 128 to PATH_MAX.

  It also removes soinfo::name field, linker uses
  dt_soname instead.

Bug: http://b/19818481
Bug: https://code.google.com/p/android/issues/detail?id=80336
Change-Id: I9cff4cb5bda3ee2bc74e1bbded9594ea7fbe2a08

linker/linker.h

diff --git a/linker/linker.h b/linker/linker.h
index ec3d8f0..7482581 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -39,6 +39,8 @@
 #include "private/libc_logging.h"
 #include "linked_list.h"
 
+#include <string>
+
 #define DL_ERR(fmt, x...) \
     do { \
       __libc_format_buffer(linker_get_error_buffer(), linker_get_error_buffer_size(), fmt, ##x); \
@@ -94,7 +96,9 @@
 
 #define SOINFO_VERSION 2
 
+#if defined(__arm__)
 #define SOINFO_NAME_LEN 128
+#endif
 
 typedef void (*linker_function_t)();
 
@@ -141,8 +145,11 @@
 struct soinfo {
  public:
   typedef LinkedList<soinfo, SoinfoListAllocator> soinfo_list_t;
+#if defined(__arm__)
+ private:
+  char old_name_[SOINFO_NAME_LEN];
+#endif
  public:
-  char name[SOINFO_NAME_LEN];
   const ElfW(Phdr)* phdr;
   size_t phnum;
   ElfW(Addr) entry;
@@ -263,8 +270,12 @@
   bool can_unload() const;
   bool is_gnu_hash() const;
 
-  bool inline has_min_version(uint32_t min_version) const {
+  bool inline has_min_version(uint32_t min_version __unused) const {
+#if defined(__arm__)
     return (flags_ & FLAG_NEW_SOINFO) != 0 && version_ >= min_version;
+#else
+    return true;
+#endif
   }
 
   bool is_linked() const;
@@ -279,7 +290,8 @@
 
   soinfo* get_local_group_root() const;
 
-  const char* get_soname();
+  const char* get_soname() const;
+  const char* get_realpath() const;
 
  private:
   ElfW(Sym)* elf_lookup(SymbolName& symbol_name);
@@ -327,6 +339,7 @@
   size_t android_relocs_size_;
 
   const char* soname_;
+  std::string realpath_;
 
   friend soinfo* get_libdl_info();
 };