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Preload libjemalloc.so for long-running Ruby #16462

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merged 1 commit into from
Jul 5, 2021
Merged

Preload libjemalloc.so for long-running Ruby #16462

merged 1 commit into from
Jul 5, 2021

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akihikodaki
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Always mark jemalloc needed if jemalloc is enabled by akihikodaki · Pull Request #4627 · ruby/ruby
ruby/ruby#4627

Symbols exported by jemalloc is referred by the shared library but not by the executables when building Ruby as a shared library with jemalloc. It causes shared libraries such as the GNU C++ library occasionally rely on the memory allocator provided by the standard C library. Worse, the resolved symbols can later be replaced with jemalloc, and jemalloc may see pointers from the standard C library, which results in various failures. e.g. #15751

As a workaround, do not rely on jemalloc enablement of Ruby, and preload libjemalloc.so instead.

@akihikodaki
Preload libjemalloc.so for long-running Ruby
af7174e 
Always mark jemalloc needed if jemalloc is enabled by akihikodaki · Pull Request mastodon#4627 · ruby/ruby
ruby/ruby#4627
> Symbols exported by jemalloc is referred by the shared library but not
> by the executables when building Ruby as a shared library with
> jemalloc. It causes shared libraries such as the GNU C++ library
> occasionally rely on the memory allocator provided by the standard C
> library. Worse, the resolved symbols can later be replaced with
> jemalloc, and jemalloc may see pointers from the standard C library,
> which results in various failures.
> e.g. mastodon#15751

As a workaround, do not rely on jemalloc enablement of Ruby, and
preload libjemalloc.so instead.
@akihikodaki akihikodaki added bug Something isn't working deployment Related to runtime configuration, production setups ruby Pull requests that update Ruby code labels Jul 4, 2021
@akihikodaki akihikodaki mentioned this pull request Jul 4, 2021
Closed
@Gargron Gargron merged commit 8af7f3b into mastodon:main Jul 5, 2021
jesseplusplus pushed a commit to jesseplusplus/decodon that referenced this pull request Feb 10, 2022
@akihikodaki @jesseplusplus
Preload libjemalloc.so for long-running Ruby (mastodon#16462)
8dae740 
Always mark jemalloc needed if jemalloc is enabled by akihikodaki · Pull Request mastodon#4627 · ruby/ruby
ruby/ruby#4627
> Symbols exported by jemalloc is referred by the shared library but not
> by the executables when building Ruby as a shared library with
> jemalloc. It causes shared libraries such as the GNU C++ library
> occasionally rely on the memory allocator provided by the standard C
> library. Worse, the resolved symbols can later be replaced with
> jemalloc, and jemalloc may see pointers from the standard C library,
> which results in various failures.
> e.g. mastodon#15751

As a workaround, do not rely on jemalloc enablement of Ruby, and
preload libjemalloc.so instead.
@ahox ahox mentioned this pull request Nov 25, 2022
Closed
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@ClearlyClaire ClearlyClaire ClearlyClaire approved these changes

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@akihikodaki @ClearlyClaire @Gargron