https://sourceware.org/bugzilla/show_bug.cgi?id=16728
Bug ID: 16728
Summary: gold fails to hide hidden tls symbols
Product: binutils
Version: 2.24
Status: NEW
Severity: normal
Priority: P2
Component: gold
Assignee: ian at airs dot com
Reporter: maillist-gdb at barfooze dot de
CC: ccoutant at google dot com
firefox 27.0.1 fails to build with gold.
Error relocating
/src/build/firefox/mozilla-release/firefox-build-dir/dist/bin/libxul.so:
gTLSThreadID: symbol not found
readelf output:
000001fbc4e0 029300000010 R_X86_64_DTPMOD64 0000000000000000 gTLSThreadID + 0
000001fbc4e8 029300000011 R_X86_64_DTPOFF64 0000000000000000 gTLSThreadID + 0
659: 0000000000000000 4 TLS LOCAL HIDDEN 17 gTLSThreadID@@xul27
with ld.bfd, grepping for gTLSThreadID returns nothing.
minimal testcase dso_tls_hidden.cc:
#pragma GCC visibility push(hidden)
__thread int foo;
#pragma GCC visibility pop
int bar() { return foo == 1; }
$ g++ -fPIC -shared dso_tls_hidden.cc -o libfoo.so
$ readelf -a libfoo.so | grep foo
000000001b80 000900000010 R_X86_64_DTPMOD64 0000000000000000 foo + 0
000000001b88 000900000011 R_X86_64_DTPOFF64 0000000000000000 foo + 0
9: 0000000000000000 4 TLS LOCAL HIDDEN 15 foo
21: 0000000000000000 4 TLS LOCAL HIDDEN 15 foo
000000: Rev: 1 Flags: BASE Index: 1 Cnt: 1 Name: libfoo.so
with ld.bfd:
$ g++ -fPIC -shared dso_tls_hidden.cc -o libfoo.so
$ readelf -a libfoo.so | grep foo
44: 0000000000000000 4 TLS LOCAL DEFAULT 14 foo
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