// icf.h -- Identical Code Folding
-// Copyright 2009, 2010 Free Software Foundation, Inc.
+// Copyright 2009, 2010, 2013 Free Software Foundation, Inc.
// Written by Sriraman Tallam <tmsriram@google.com>.
// This file is part of gold.
typedef std::vector<Symbol*> Symbol_info;
typedef std::vector<std::pair<long long, long long> > Addend_info;
typedef std::vector<uint64_t> Offset_info;
+ typedef std::vector<unsigned int> Reloc_addend_size_info;
typedef Unordered_map<Section_id,
unsigned int,
Section_id_hash> Uniq_secn_id_map;
// This stores the symbol value and the addend for a reloc.
Addend_info addend_info;
Offset_info offset_info;
+ Reloc_addend_size_info reloc_addend_size_info;
} Reloc_info;
typedef Unordered_map<Section_id, Reloc_info,
Icf()
: id_section_(), section_id_(), kept_section_id_(),
fptr_section_id_(),
- num_tracked_relocs(NULL), icf_ready_(false),
+ icf_ready_(false),
reloc_info_list_()
{ }
void
unfold_section(Object* obj, unsigned int shndx);
- // Returns the kept section corresponding to the
+ // Returns the kept section corresponding to the
// given section.
bool
is_section_folded(Object* obj, unsigned int shndx);
// Given an object and a section index, this returns true if the
// pointer of the function defined in this section is taken.
bool
- section_has_function_pointers(Object *obj, unsigned int shndx)
+ section_has_function_pointers(Object* obj, unsigned int shndx)
{
return (this->fptr_section_id_.find(Section_id(obj, shndx))
!= this->fptr_section_id_.end());
// Records that a pointer of the function defined in this section
// is taken.
void
- set_section_has_function_pointers(Object *obj, unsigned int shndx)
+ set_section_has_function_pointers(Object* obj, unsigned int shndx)
{
this->fptr_section_id_.insert(Section_id(obj, shndx));
}
// corresponding to taken function pointers. Ignores eh_frame
// and vtable sections.
inline bool
- check_section_for_function_pointers(std::string section_name,
+ check_section_for_function_pointers(const std::string& section_name,
Target* target)
{
return (parameters->options().icf_safe_folding()
&& target->can_check_for_function_pointers()
- && !is_prefix_of(".rodata._ZTV", section_name.c_str())
- && !is_prefix_of(".data.rel.ro._ZTV", section_name.c_str())
- && !is_prefix_of(".eh_frame", section_name.c_str()));
+ && target->section_may_have_icf_unsafe_pointers(
+ section_name.c_str()));
}
// Returns a map of a section to info (Reloc_info) about its relocations.
Reloc_info_list&
reloc_info_list()
{ return this->reloc_info_list_; }
-
+
// Returns a mapping of each section to a unique integer.
Uniq_secn_id_map&
section_to_int_map()
// function is taken in which case it is dangerous to fold
// this function.
Secn_fptr_taken_set fptr_section_id_;
- unsigned int* num_tracked_relocs;
// Flag to indicate if ICF has been run.
bool icf_ready_;
// This list is populated by gc_process_relocs in gc.h.
// earlier gcc versions, like 4.0.3, put constructors and destructors in
// .gnu.linkonce.t sections and hence should be included too.
inline bool
-is_section_foldable_candidate(const char* section_name)
+is_section_foldable_candidate(const std::string& section_name)
{
- return (is_prefix_of(".text", section_name)
- || is_prefix_of(".gnu.linkonce.t", section_name));
+ const char* section_name_cstr = section_name.c_str();
+ return (is_prefix_of(".text", section_name_cstr)
+ || is_prefix_of(".gnu.linkonce.t", section_name_cstr));
}
} // End of namespace gold.