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* dwarf_reader.cc (next_generation_count): New static var.

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(Addr2line_cache_entry): New struct.
	(addr2line_cache): New static var.
	(Dwarf_line_info::one_addr2line): Added caching.
	(Dwarf_line_info::clear_addr2line_cache): New function.
	* dwarf_reader.h (Dwarf_line_info::one_addr2line): Add
	cache-size parameter.
	(Dwarf_line_info::one_addr2line_cache): New function.
	* symtab.cc (Symbol_table::detect_odr_violations): Pass
	new cache-size argument to one_addr2line(), and clear cache.
This commit is contained in:
Craig Silverstein
2008-05-01 00:25:33 +00:00
parent f089c43345
commit e4e5049b7b
4 changed files with 134 additions and 23 deletions
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18
gold/dwarf_reader.h
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@ -72,12 +72,20 @@ class Dwarf_line_info
addr2line(unsigned int shndx, off_t offset)
{ return do_addr2line(shndx, offset); }
// A helper function for a single addr2line lookup. It uses
// parameters() to figure out the size and endianness. This is less
// efficient than using the templatized size and endianness, so only
// call this from an un-templatized context.
// A helper function for a single addr2line lookup. It also keeps a
// cache of the last CACHE_SIZE Dwarf_line_info objects it created;
// set to 0 not to cache at all. The larger CACHE_SIZE is, the more
// chance this routine won't have to re-create a Dwarf_line_info
// object for its addr2line computation; such creations are slow.
// NOTE: Not thread-safe, so only call from one thread at a time.
static std::string
one_addr2line(Object* object, unsigned int shndx, off_t offset);
one_addr2line(Object* object, unsigned int shndx, off_t offset,
size_t cache_size);
// This reclaims all the memory that one_addr2line may have cached.
// Use this when you know you will not be calling one_addr2line again.
static void
clear_addr2line_cache();
private:
virtual std::string