wasi-libc recently added a family of `dl*` functions[^1], but it still
doesn't have `dladdr` unlike other platforms. Guard the use of `dladdr`
with `HAVE_DLADDR` to avoid build failure with the head version of
wasi-libc.
The library name is used only for diagnostic purpose if it's not NULL,
so it's safe to skip it.
[^1]: b85d65528d
This is a C API for extensions to resolve and get function symbols of other extensions.
Extensions can check the expected symbol is correctly loaded and accessible, and
use it if it is available.
Otherwise, extensions can raise their own error to guide users to setup their
environments correctly and what's missing.
The symbol resolved by dln_symbol will eventually be passed to
extensions. The error handling of dln_sym is also separated into
dln_sym_func because the new call resolving symbols will not raise
LoadError.
macOS's AvailabilityMacros.h does not contain macros for future
versions. If a version macro is not defined, consider only earlier
versions to be targeted.
Header file include/ruby/internal/abi.h contains RUBY_ABI_VERSION which
is the ABI version. This value should be bumped whenever an ABI
incompatible change is introduced.
When loading dynamic libraries, Ruby will compare its own
`ruby_abi_version` and the `ruby_abi_version` of the loaded library. If
these two values don't match it will raise a `LoadError`. This feature
can also be turned off by setting the environment variable
`RUBY_RUBY_ABI_CHECK=0`.
This feature will prevent cases where previously installed native gems
fail in unexpected ways due to incompatibility of changes in header
files. This will force the developer to recompile their gems to use the
same header files as the built Ruby.
In Ruby, the ABI version is exposed through
`RbConfig::CONFIG["ruby_abi_version"]`.
Saves comitters' daily life by avoid #include-ing everything from
internal.h to make each file do so instead. This would significantly
speed up incremental builds.
We take the following inclusion order in this changeset:
1. "ruby/config.h", where _GNU_SOURCE is defined (must be the very
first thing among everything).
2. RUBY_EXTCONF_H if any.
3. Standard C headers, sorted alphabetically.
4. Other system headers, maybe guarded by #ifdef
5. Everything else, sorted alphabetically.
Exceptions are those win32-related headers, which tend not be self-
containing (headers have inclusion order dependencies).
We see several occurrence of "diagnostic push/pop" so why not
make them macros. Tested on GCC8 / Clang 6.
Note that ruby.h is intentionally left untouched because we don't
want to introduce new public macros.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64118 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* dln.c (dln_incompatible_library_p): renamed as the error message
with dln prefix, since it is not bound to xmalloc restrictively.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61577 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* dln.c (xmalloc_mismatch_p): define only when using dlopen,
otherwise dlsym is not available too, and should be used then.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61576 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
However dlsym() requires such feature so this function is non-
portable by nature. Cannot but suppress warning.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61559 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* addr2line.c (follow_debuglink): insert global_debug_dir by using
memmove instead of copying to temporary buffer.
* dln.c (dln_load): use memcpy with the known length instead of
strcpy.
* gc.c (rb_gc_unprotect_logging): use strdup instead of malloc and
strcpy.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57189 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* dln.c (dln_load): move the definition of incompatible library
version error message to be shared.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54514 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* beos: Drop support for BeOS now that Haiku is stable.
[Fix GH-1112]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52731 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* dln.c (dln_load): raise fatal error on OSX not other extension
libraries to refer different libruby.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50413 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Nobuyoshi Nakada
Yuta Saito
Satoshi Tagomori
drew-wells
Sergey Fedorov
Takashi Kokubun
Peter Zhu
Kazuhiro NISHIYAMA
卜部昌平
Samuel Williams
shyouhei
nobu
kosaki