Delete |pthread_key_t| on dlclose.

When OPENSSL_DANGEROUS_RELEASE_PTHREAD_KEY is defined during the build,
this change adds a destructor function that is called when BoringSSL is
unloaded via |dlclose| or during process exit. Using |dlclose| with
BoringSSL is not supported and will leak memory, but this change allows
some code that is already doing it to survive longer.

Change-Id: Ifc6d6aae61ed0f15d61cd3dbb4ea9f8006e43dba
Reviewed-by: Adam Langley <>
Reviewed-by: David Benjamin <>
Reviewed-by: Fred Gylys-Colwell <>
1 file changed
tree: 3f951e024db907eda2e0b99331726590551e33f8
  1. .clang-format
  2. .github/
  3. .gitignore
  6. CMakeLists.txt
  14. codereview.settings
  15. crypto/
  16. decrepit/
  17. fipstools/
  18. fuzz/
  19. include/
  20. infra/
  21. sources.cmake
  22. ssl/
  23. third_party/
  24. tool/
  25. util/


BoringSSL is a fork of OpenSSL that is designed to meet Google's needs.

Although BoringSSL is an open source project, it is not intended for general use, as OpenSSL is. We don't recommend that third parties depend upon it. Doing so is likely to be frustrating because there are no guarantees of API or ABI stability.

Programs ship their own copies of BoringSSL when they use it and we update everything as needed when deciding to make API changes. This allows us to mostly avoid compromises in the name of compatibility. It works for us, but it may not work for you.

BoringSSL arose because Google used OpenSSL for many years in various ways and, over time, built up a large number of patches that were maintained while tracking upstream OpenSSL. As Google's product portfolio became more complex, more copies of OpenSSL sprung up and the effort involved in maintaining all these patches in multiple places was growing steadily.

Currently BoringSSL is the SSL library in Chrome/Chromium, Android (but it's not part of the NDK) and a number of other apps/programs.

There are other files in this directory which might be helpful: