diff options
author | Abseil Team <absl-team@google.com> | 2020-09-18 15:55:15 -0700 |
---|---|---|
committer | Derek Mauro <dmauro@google.com> | 2020-09-24 13:47:15 -0400 |
commit | b56cbdd23834a65682c0b46f367f8679e83bc894 (patch) | |
tree | dacab9a64dd1a9e9668737e511d1a5420ff96001 /absl/debugging/internal/vdso_support.cc | |
parent | b832dce8489ef7b6231384909fd9b68d5a5ff2b7 (diff) |
Abseil LTS 2020092320200923
What's New:
* `absl::StatusOr<T>` has been released. See our [blog
post](https://abseil.io/blog/2020-091021-status) for more
information.
* Abseil Flags reflection interfaces have been released.
* Abseil Flags memory usage has been significantly optimized.
* Abseil now supports a "hardened" build mode. This build mode enables
runtime checks that guard against programming errors that may lead
to security vulnerabilities.
Notable Fixes:
* Sanitizer dynamic annotations like `AnnotateRWLockCreate` that are
also defined by the compiler sanitizer implementation are no longer
also defined by Abseil.
* Sanitizer macros are now prefixed with `ABSL_` to avoid naming collisions.
* Sanitizer usage is now automatically detected and no longer requires
macros like `ADDRESS_SANITIZER` to be defined on the command line.
Breaking Changes:
* Abseil no longer contains a `dynamic_annotations` library. Users
using a supported build system (Bazel or CMake) are unaffected by
this, but users manually specifying link libraries may get an error
about a missing linker input.
Baseline: 7680a5f8efe32de4753baadbd63e74e59d95bac1
Cherry picks: None
Diffstat (limited to 'absl/debugging/internal/vdso_support.cc')
-rw-r--r-- | absl/debugging/internal/vdso_support.cc | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/absl/debugging/internal/vdso_support.cc b/absl/debugging/internal/vdso_support.cc index 1e8a78ac..6be16d90 100644 --- a/absl/debugging/internal/vdso_support.cc +++ b/absl/debugging/internal/vdso_support.cc @@ -76,15 +76,6 @@ const void *VDSOSupport::Init() { } #endif // __GLIBC_PREREQ(2, 16) if (vdso_base_.load(std::memory_order_relaxed) == kInvalidBase) { - // Valgrind zaps AT_SYSINFO_EHDR and friends from the auxv[] - // on stack, and so glibc works as if VDSO was not present. - // But going directly to kernel via /proc/self/auxv below bypasses - // Valgrind zapping. So we check for Valgrind separately. - if (RunningOnValgrind()) { - vdso_base_.store(nullptr, std::memory_order_relaxed); - getcpu_fn_.store(&GetCPUViaSyscall, std::memory_order_relaxed); - return nullptr; - } int fd = open("/proc/self/auxv", O_RDONLY); if (fd == -1) { // Kernel too old to have a VDSO. @@ -175,18 +166,6 @@ int GetCPU() { return ret_code == 0 ? cpu : ret_code; } -// We need to make sure VDSOSupport::Init() is called before -// InitGoogle() does any setuid or chroot calls. If VDSOSupport -// is used in any global constructor, this will happen, since -// VDSOSupport's constructor calls Init. But if not, we need to -// ensure it here, with a global constructor of our own. This -// is an allowed exception to the normal rule against non-trivial -// global constructors. -static class VDSOInitHelper { - public: - VDSOInitHelper() { VDSOSupport::Init(); } -} vdso_init_helper; - } // namespace debugging_internal ABSL_NAMESPACE_END } // namespace absl |