Commit graph

15 commits

Author SHA1 Message Date
Dimitry Ivanov
ae74e8750b linker: hide the pointer to soinfo
Handle no longer is a pointer to soinfo of
a corresponding library. This is done to
prevent access to linker internal fields.

Bug: http://b/25593965
Change-Id: I62bff0d0e5b2dc842e6bf0babb30fcc4c000be24
(cherry picked from commit d88e1f3501)
2016-03-28 15:33:07 -07:00
Dmitriy Ivanov
42d5fcb9f4 Introducing linker namespaces
Bug: http://b/22548808
Change-Id: Ia3af3c0a167f1d16447a3d83bb045d143319b1e1
2015-11-15 12:09:16 -08:00
Dmitriy Ivanov
7a9311f7f1 Fix linked_list::remove_if()
When remove_if removes last element from the list
following push_back stops working.

Change-Id: Ia3e92763b83a2e172eaa10de7aecfb7a4be452d7
2015-11-05 17:41:05 -08:00
Dmitriy Ivanov
2a81536144 Support symbol versioning
Bug: http://b/20139821
Change-Id: I64122a0fb0960c20b2ce614161b7ab048456b681
2015-04-16 17:57:30 -07:00
Dmitriy Ivanov
ab972b9adf Count references for groups instead of instances
Count references on the group level to avoid
  partially unloading function that might be
  referenced by other libraries in the local_group

  Bonus: with this change we can correctly unload recursively
  linked libraries. is_recursive check is removed.

  Also dynamic executables (not .so) with 0 DT_NEEDED libraries
  are now correctly linked.

Change-Id: Idfa83baef402840599b93a875f2881d9f020dbcd
2014-12-02 10:54:26 -08:00
Dmitriy Ivanov
d225a5e652 Fix symbol lookup order during relocation
Relocate symbol against DF_1_GLOBAL shared libraries
  loaded before this shared library. This includes
  main executable, ld_preloads and other libraries
  that have DF_1_GLOBAL flag set.

Bug: 2643900
Bug: 15432753
Change-Id: Ia788748be59b739d1c7e62b978e7e255f9e65c7b
2014-10-31 11:39:51 -07:00
Dmitriy Ivanov
cfa97f172d Fix relocation to look for symbols in local group
The local group is a sequence of libraries in default (breadth-first)
  order. It allows RTLD_LOCALLY loaded library to correctly relocate
  symbols within its group (see test-cases).

  Local group lookup is performed after main executable and ld_preloads.

Bug: 2643900
Bug: 15432753
Change-Id: I9bb013b46d17dbb5cbdfb8fef26f552748385541
2014-10-23 12:13:54 -07:00
Dmitriy Ivanov
14669a939d Load libraries in breadth-first order
This patch fixes the problem with symbol search order
  for dlsym(RTLD_DEFAULT/RTLD_NEXT, .) by loading libraries
  and ld_preloads in correct order.

Bug: https://code.google.com/p/android/issues/detail?id=74255
Change-Id: If1ba5c807322409faa914e27ecb675e2c4541f0d
Attempt: 2
2014-09-08 13:02:50 -07:00
Dmitriy Ivanov
a492605849 Implement LinkedList::visit()
Change-Id: Ibd9d133dddf1f2e6e65660e3cd2dacafcc0c84d9
2014-09-02 09:45:40 -07:00
Dmitriy Ivanov
4bea498544 Erase elements in LinkedList::remove_if
Change-Id: I5119a78c73ffe780a81c53ab5ff0266d5c82d319
2014-08-29 17:09:24 -07:00
Dmitriy Ivanov
14241402de Enable __cxa_atexit && __cxa_finalize for linker
This allows adding destructors to classes used
 for global variables.

Change-Id: I5e1cd63fe3bf8f66de88cc4f7437cafb350f49b5
2014-08-26 15:44:18 -07:00
Dmitriy Ivanov
042426ba63 Optimize symbol lookup
Do not run symbol lookup on already visited soinfos
 Not taking into account already visited libraries
 dramatically slows down dlsym in cases when there
 are multiple occurrences of a large library in
 dependency tree.

Bug: 16977077
Change-Id: I1379f30ed8b06758dd1cc76b80833ac8589afa50
2014-08-13 09:21:57 -07:00
Dmitriy Ivanov
aa0f2bdbc2 Fix dlsym(3) to do breadth first search.
dlsym(3) with handle != RTLD_DEFAULT|RTLD_NEXT performs
  breadth first search through the dependency tree.

Bug: 16653281
Change-Id: I017a6975d1a62abb0218a7eb59ae4deba458e324
2014-07-29 14:35:13 -07:00
Elliott Hughes
d286796fce Turn on -Wunused and fix the mistakes it uncovers.
Change-Id: I023d2d8b547fbc21d4124bb7510d42b06a0dc501
2014-06-03 15:22:34 -07:00
Dmitriy Ivanov
d59e50063a Improve detection of already loaded libraries
Linker is now able to resolve symlinked libraries correctly.

soinfo is extended to save the graph of dependencies during
load/unload. Dependencies are used only in CallConstructor.

Bug: 9741592
Change-Id: Id9c48a74c46aa89bcdf3d54ec2f8ba3d398130b1
2014-05-14 15:16:35 -07:00