// stringpool.cc -- a string pool for gold
-// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
+// Copyright (C) 2006-2020 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
{
template<typename Stringpool_char>
-Stringpool_template<Stringpool_char>::Stringpool_template()
+Stringpool_template<Stringpool_char>::Stringpool_template(uint64_t addralign)
: string_set_(), key_to_offset_(), strings_(), strtab_size_(0),
- zero_null_(true)
+ zero_null_(true), optimize_(false), offset_(sizeof(Stringpool_char)),
+ addralign_(addralign)
{
+ if (parameters->options_valid()
+ && parameters->options().optimize() >= 2
+ && addralign <= sizeof(Stringpool_char))
+ this->optimize_ = true;
}
template<typename Stringpool_char>
{
this->key_to_offset_.reserve(n);
-#if defined(HAVE_TR1_UNORDERED_MAP)
+#if defined(HAVE_UNORDERED_MAP)
+ this->string_set_.rehash(this->string_set_.size() + n);
+ return;
+#elif defined(HAVE_TR1_UNORDERED_MAP)
// rehash() implementation is broken in gcc 4.0.3's stl
//this->string_set_.rehash(this->string_set_.size() + n);
//return;
this->string_set_.swap(new_string_set);
}
-// Return the length of a string of arbitrary character type.
-
-template<typename Stringpool_char>
-size_t
-Stringpool_template<Stringpool_char>::string_length(const Stringpool_char* p)
-{
- size_t len = 0;
- for (; *p != 0; ++p)
- ++len;
- return len;
-}
-
-// Specialize string_length for char. Maybe we could just use
-// std::char_traits<>::length?
-
-template<>
-inline size_t
-Stringpool_template<char>::string_length(const char* p)
-{
- return strlen(p);
-}
-
// Compare two strings of arbitrary character type for equality.
template<typename Stringpool_char>
Stringpool_template<Stringpool_char>::string_hash(const Stringpool_char* s,
size_t length)
{
- // This is the hash function used by the dynamic linker for
- // DT_GNU_HASH entries. I compared this to a Fowler/Noll/Vo hash
- // for a C++ program with 385,775 global symbols. This hash
- // function was very slightly worse. However, it is much faster to
- // compute. Overall wall clock time was a win.
- const unsigned char* p = reinterpret_cast<const unsigned char*>(s);
- size_t h = 5381;
- for (size_t i = 0; i < length * sizeof(Stringpool_char); ++i)
- h = h * 33 + *p++;
- return h;
+ return gold::string_hash<Stringpool_char>(s, length);
}
// Add the string S to the list of canonical strings. Return a
alc = sizeof(Stringdata) + buffer_size;
else
{
- Stringdata *psd = this->strings_.front();
+ Stringdata* psd = this->strings_.front();
if (len > psd->alc - psd->len)
alc = sizeof(Stringdata) + buffer_size;
else
}
}
- Stringdata *psd = reinterpret_cast<Stringdata*>(new char[alc]);
+ Stringdata* psd = reinterpret_cast<Stringdata*>(new char[alc]);
psd->alc = alc - sizeof(Stringdata);
memcpy(psd->data, s, len - sizeof(Stringpool_char));
memset(psd->data + len - sizeof(Stringpool_char), 0,
return this->add_with_length(s, string_length(s), copy, pkey);
}
+// Add a new key offset entry.
+
+template<typename Stringpool_char>
+void
+Stringpool_template<Stringpool_char>::new_key_offset(size_t length)
+{
+ section_offset_type offset;
+ if (this->zero_null_ && length == 0)
+ offset = 0;
+ else
+ {
+ offset = this->offset_;
+ // Align strings.
+ offset = align_address(offset, this->addralign_);
+ this->offset_ = offset + (length + 1) * sizeof(Stringpool_char);
+ }
+ this->key_to_offset_.push_back(offset);
+}
+
template<typename Stringpool_char>
const Stringpool_char*
Stringpool_template<Stringpool_char>::add_with_length(const Stringpool_char* s,
{
// We just added the string. The key value has now been
// used.
- this->key_to_offset_.push_back(0);
+ this->new_key_offset(length);
}
else
{
return p->first.string;
}
- this->key_to_offset_.push_back(0);
+ this->new_key_offset(length);
hk.string = this->add_string(s, length);
// The contents of the string stay the same, so we don't need to
// the strtab size, and gives a relatively small benefit (it's
// typically rare for a symbol to be a suffix of another), we only
// take the time to sort when the user asks for heavy optimization.
- if (parameters->options().optimize() < 2)
+ if (!this->optimize_)
{
- for (typename String_set_type::iterator curr = this->string_set_.begin();
- curr != this->string_set_.end();
- curr++)
- {
- section_offset_type* poff = &this->key_to_offset_[curr->second - 1];
- if (this->zero_null_ && curr->first.string[0] == 0)
- *poff = 0;
- else
- {
- *poff = offset;
- offset += (curr->first.length + 1) * charsize;
- }
- }
+ // If we are not optimizing, the offsets are already assigned.
+ offset = this->offset_;
}
else
{
if (this->zero_null_ && (*curr)->first.string[0] == 0)
this_offset = 0;
else if (last != v.end()
+ && ((((*curr)->first.length - (*last)->first.length)
+ % this->addralign_) == 0)
&& is_suffix((*curr)->first.string,
(*curr)->first.length,
(*last)->first.string,
* charsize));
else
{
- this_offset = offset;
- offset += ((*curr)->first.length + 1) * charsize;
+ this_offset = align_address(offset, this->addralign_);
+ offset = this_offset + ((*curr)->first.length + 1) * charsize;
}
this->key_to_offset_[(*curr)->second - 1] = this_offset;
last_offset = this_offset;
void
Stringpool_template<Stringpool_char>::print_stats(const char* name) const
{
-#if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP)
+#if defined(HAVE_UNORDERED_MAP) || defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP)
fprintf(stderr, _("%s: %s entries: %zu; buckets: %zu\n"),
program_name, name, this->string_set_.size(),
this->string_set_.bucket_count());
projects / deliverable / binutils-gdb.git / blobdiff