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2011-10-31 Sriraman Tallam <tmsriram@google.com>

Browse source 
* symtab.h (Symbol_table::gc_mark_symbol_for_shlib): Rename to
	gc_mark_symbol.
	* symtab.cc (Symbol_table::gc_mark_symbol_for_shlib): Rename to
	gc_mark_symbol.
	Change to just keep the section associated with symbol.
	(Symbol_table::add_from_relobj): Mark symbols as not garbage when
	they are externally visible and --export-dynamic is turned on.
	(Symbol_table::gc_mark_dyn_syms): Call gc_mark_symbol.
This commit is contained in:
Sriraman Tallam 2011-10-31 21:36:54 +00:00
parent b9fd179153
commit 7257cc92ac
3 changed files with 32 additions and 30 deletions
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11
gold/ChangeLog
View file

@ -1,3 +1,14 @@
2011-10-31 Sriraman Tallam <tmsriram@google.com>
* symtab.h (Symbol_table::gc_mark_symbol_for_shlib): Rename to
gc_mark_symbol.
* symtab.cc (Symbol_table::gc_mark_symbol_for_shlib): Rename to
gc_mark_symbol.
Change to just keep the section associated with symbol.
(Symbol_table::add_from_relobj): Mark symbols as not garbage when
they are externally visible and --export-dynamic is turned on.
(Symbol_table::gc_mark_dyn_syms): Call gc_mark_symbol.
2011-10-19 Ian Lance Taylor <iant@google.com>
PR gold/13163

46
gold/symtab.cc
View file

@ -602,20 +602,16 @@ Symbol_table::gc_mark_undef_symbols(Layout* layout)
}
void
Symbol_table::gc_mark_symbol_for_shlib(Symbol* sym)
Symbol_table::gc_mark_symbol(Symbol* sym)
{
if (!sym->is_from_dynobj()
&& sym->is_externally_visible())
// Add the object and section to the work list.
Relobj* obj = static_cast<Relobj*>(sym->object());
bool is_ordinary;
unsigned int shndx = sym->shndx(&is_ordinary);
if (is_ordinary && shndx != elfcpp::SHN_UNDEF)
{
//Add the object and section to the work list.
Relobj* obj = static_cast<Relobj*>(sym->object());
bool is_ordinary;
unsigned int shndx = sym->shndx(&is_ordinary);
if (is_ordinary && shndx != elfcpp::SHN_UNDEF)
{
gold_assert(this->gc_!= NULL);
this->gc_->worklist().push(Section_id(obj, shndx));
}
gold_assert(this->gc_!= NULL);
this->gc_->worklist().push(Section_id(obj, shndx));
}
}
@ -626,16 +622,7 @@ Symbol_table::gc_mark_dyn_syms(Symbol* sym)
{
if (sym->in_dyn() && sym->source() == Symbol::FROM_OBJECT
&& !sym->object()->is_dynamic())
{
Relobj* obj = static_cast<Relobj*>(sym->object());
bool is_ordinary;
unsigned int shndx = sym->shndx(&is_ordinary);
if (is_ordinary && shndx != elfcpp::SHN_UNDEF)
{
gold_assert(this->gc_ != NULL);
this->gc_->worklist().push(Section_id(obj, shndx));
}
}
this->gc_mark_symbol(sym);
}
// Make TO a symbol which forwards to FROM.
@ -1251,11 +1238,16 @@ Symbol_table::add_from_relobj(
if (is_forced_local)
this->force_local(res);
// If building a shared library using garbage collection, do not
// treat externally visible symbols as garbage.
if (parameters->options().gc_sections()
&& parameters->options().shared())
this->gc_mark_symbol_for_shlib(res);
// Do not treat this symbol as garbage if this symbol will be
// exported to the dynamic symbol table. This is true when
// building a shared library or using --export-dynamic and
// the symbol is externally visible.
if (parameters->options().gc_sections()
&& res->is_externally_visible()
&& !res->is_from_dynobj()
&& (parameters->options().shared()
|| parameters->options().export_dynamic()))
this->gc_mark_symbol(res);
if (is_defined_in_discarded_section)
res->set_is_defined_in_discarded_section();

5
gold/symtab.h
View file

@ -1313,10 +1313,9 @@ class Symbol_table
void
gc_mark_undef_symbols(Layout*);
// During garbage collection, this ensures externally visible symbols
// are not treated as garbage while building shared objects.
// This tells garbage collection that this symbol is referenced.
void
gc_mark_symbol_for_shlib(Symbol* sym);
gc_mark_symbol(Symbol* sym);
// During garbage collection, this keeps sections that correspond to
// symbols seen in dynamic objects.