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Add --stats option to print runtime and memory usage statistics.

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This commit is contained in:
Ian Lance Taylor
2007-10-12 05:51:25 +00:00
parent 6ca8706da5
commit e44fcf3bcf
10 changed files with 205 additions and 3 deletions
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23
gold/fileread.h
View File

@ -46,7 +46,7 @@ class File_read
public:
File_read()
: name_(), descriptor_(-1), size_(0), lock_count_(0), views_(),
saved_views_(), contents_(NULL)
saved_views_(), contents_(NULL), mapped_bytes_(0)
{ }
~File_read();
@ -109,11 +109,27 @@ class File_read
File_view*
get_lasting_view(off_t start, off_t size, bool cache);
// Dump statistical information to stderr.
static void
print_stats();
private:
// This class may not be copied.
File_read(const File_read&);
File_read& operator=(const File_read&);
// Total bytes mapped into memory during the link. This variable is
// only accessed from the main thread, when unlocking the object.
static unsigned long long total_mapped_bytes;
// Current number of bytes mapped into memory during the link. This
// variable is only accessed from the main thread.
static unsigned long long current_mapped_bytes;
// High water mark of bytes mapped into memory during the link.
// This variable is only accessed from the main thread.
static unsigned long long maximum_mapped_bytes;
// A view into the file.
class View
{
@ -167,6 +183,7 @@ class File_read
bool mapped_;
};
friend class View;
friend class File_view;
// Find a view into the file.
@ -219,6 +236,10 @@ class File_read
Saved_views saved_views_;
// Specified file contents. Used only for testing purposes.
const unsigned char* contents_;
// Total amount of space mapped into memory. This is only changed
// while the file is locked. When we unlock the file, we transfer
// the total to total_mapped_bytes, and reset this to zero.
size_t mapped_bytes_;
};
// A view of file data that persists even when the file is unlocked.