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Revert LLVM r306813: Resolve references properly when using .symver

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This LLD commit was intended to fix one case of symbol versioning
(LLVM PR28414) but broke FreeBSD buildworld.  It has been reverted
upstream in LLVM r306996.

Discussed with:	dim
This commit is contained in:
Ed Maste 2017-07-03 13:41:05 +00:00
parent f6e653bb10
commit bb07ac4d64
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/projects/clang500-import/; revision=320597
1 changed files with 4 additions and 20 deletions
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24
contrib/llvm/tools/lld/ELF/SymbolTable.cpp
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@ -712,31 +712,15 @@ void SymbolTable<ELFT>::assignWildcardVersion(SymbolVersion Ver,
B->symbol()->VersionId = VersionId;
}
static bool isDefaultVersion(SymbolBody *B) {
return B->isInCurrentDSO() && B->getName().find("@@") != StringRef::npos;
}
// This function processes version scripts by updating VersionId
// member of symbols.
template <class ELFT> void SymbolTable<ELFT>::scanVersionScript() {
// Symbol themselves might know their versions because symbols
// can contain versions in the form of <name>@<version>.
// Let them parse and update their names to exclude version suffix.
for (Symbol *Sym : SymVector) {
SymbolBody *Body = Sym->body();
bool IsDefault = isDefaultVersion(Body);
Body->parseSymbolVersion();
if (!IsDefault)
continue;
// <name>@@<version> means the symbol is the default version. If that's the
// case, the symbol is not used only to resolve <name> of version <version>
// but also undefined unversioned symbols with name <name>.
SymbolBody *S = find(Body->getName());
if (S && S->isUndefined())
S->copy(Body);
}
// Let them parse their names.
if (!Config->VersionDefinitions.empty())
for (Symbol *Sym : SymVector)
Sym->body()->parseSymbolVersion();
// Handle edge cases first.
handleAnonymousVersion();