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| author |  Adam Cozzette <acozzette@google.com> | 2017-03-08 11:25:48 -0800 |
|---|---|---|
| committer | Adam Cozzette <acozzette@google.com> | 2017-03-09 10:03:22 -0800 |
| commit | 9fa40314fcfd19d2e09459faeb480d213af56324 (patch) | |
| tree | 363b97e8e92cadcd578ade2c53af25f7bf4f7b3a /Makefile.am | |
| parent | 2b7430d96aeff2bb624c8d52182ff5e4b9f7f18a (diff) | |
Ruby: wrap calls to memcpy so that gem is compatible with pre-2.14 glibc
This commit adds a __wrap_memcpy function and a linker flag to use that
in place of memcpy for our Ruby gem C extension. This allows us to
always use the 2.2.5 version of memcpy, making it possible to use the
gem on distributions with pre-2.14 versions of glibc.
Before this change:
$ objdump -T protobuf_c.so | grep memcpy
0000000000000000 DF *UND* 0000000000000000 GLIBC_2.3.4 __memcpy_chk
0000000000000000 DF *UND* 0000000000000000 GLIBC_2.14 memcpy
After:
$ objdump -T protobuf_c.so | grep memcpy
0000000000000000 DF *UND* 0000000000000000 GLIBC_2.2.5 memcpy
0000000000000000 DF *UND* 0000000000000000 GLIBC_2.3.4 __memcpy_chk
0000000000042450 g DF .text 0000000000000005 Base __wrap_memcpy
This is based on gRPC's solution to a similar problem:
https://github.com/grpc/grpc/blob/5098508d2d41a116113f7e333c516cd9ef34a943/src/core/lib/support/wrap_memcpy.c
This fixes issue #2783.
Diffstat (limited to 'Makefile.am')
| -rw-r--r-- | Makefile.am | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Makefile.am b/Makefile.am index c8f7f696..3222417f 100644 --- a/Makefile.am +++ b/Makefile.am @@ -795,6 +795,7 @@ ruby_EXTRA_DIST= \ ruby/ext/google/protobuf_c/storage.c \ ruby/ext/google/protobuf_c/upb.c \ ruby/ext/google/protobuf_c/upb.h \ + ruby/ext/google/protobuf_c/wrap_memcpy.c \ ruby/google-protobuf.gemspec \ ruby/lib/google/protobuf/message_exts.rb \ ruby/lib/google/protobuf/repeated_field.rb \ |