15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===-- Memory.cpp ----------------------------------------------*- C++ -*-===// 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The LLVM Compiler Infrastructure 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 52a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// This file is distributed under the University of Illinois Open Source 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// License. See LICENSE.TXT for details. 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===----------------------------------------------------------------------===// 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)#include "lldb/Target/Memory.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// C Includes 12d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)// C++ Includes 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Other libraries and framework includes 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Project includes 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "lldb/Core/DataBufferHeap.h" 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "lldb/Core/State.h" 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "lldb/Core/Log.h" 183551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)#include "lldb/Target/Process.h" 193551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using namespace lldb; 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using namespace lldb_private; 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//---------------------------------------------------------------------- 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// MemoryCache constructor 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//---------------------------------------------------------------------- 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)MemoryCache::MemoryCache(Process &process) : 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_process (process), 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_cache_line_byte_size (512), 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_mutex (Mutex::eMutexTypeRecursive), 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_cache (), 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_invalid_ranges () 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//---------------------------------------------------------------------- 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Destructor 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//---------------------------------------------------------------------- 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)MemoryCache::~MemoryCache() 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)MemoryCache::Clear(bool clear_invalid_ranges) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Mutex::Locker locker (m_mutex); 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_cache.clear(); 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (clear_invalid_ranges) 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_invalid_ranges.Clear(); 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void 52cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)MemoryCache::Flush (addr_t addr, size_t size) 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (size == 0) 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 573551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Mutex::Locker locker (m_mutex); 583551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) if (m_cache.empty()) 593551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return; 603551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint32_t cache_line_byte_size = m_cache_line_byte_size; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const addr_t end_addr = (addr + size - 1); 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const addr_t first_cache_line_addr = addr - (addr % cache_line_byte_size); 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const addr_t last_cache_line_addr = end_addr - (end_addr % cache_line_byte_size); 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Watch for overflow where size will cause us to go off the end of the 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 64 bit address space 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t num_cache_lines; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (last_cache_line_addr >= first_cache_line_addr) 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) num_cache_lines = ((last_cache_line_addr - first_cache_line_addr)/cache_line_byte_size) + 1; 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) num_cache_lines = (UINT64_MAX - first_cache_line_addr + 1)/cache_line_byte_size; 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t cache_idx = 0; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (addr_t curr_addr = first_cache_line_addr; 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cache_idx < num_cache_lines; 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) curr_addr += cache_line_byte_size, ++cache_idx) 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BlockMap::iterator pos = m_cache.find (curr_addr); 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (pos != m_cache.end()) 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_cache.erase(pos); 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)MemoryCache::AddInvalidRange (lldb::addr_t base_addr, lldb::addr_t byte_size) 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (byte_size > 0) 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Mutex::Locker locker (m_mutex); 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) InvalidRanges::Entry range (base_addr, byte_size); 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_invalid_ranges.Append(range); 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_invalid_ranges.Sort(); 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)MemoryCache::RemoveInvalidRange (lldb::addr_t base_addr, lldb::addr_t byte_size) 983551c9c881056c480085172ff9840cab31610854Torne (Richard Coles){ 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (byte_size > 0) 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Mutex::Locker locker (m_mutex); 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint32_t idx = m_invalid_ranges.FindEntryIndexThatContains(base_addr); 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (idx != UINT32_MAX) 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const InvalidRanges::Entry *entry = m_invalid_ranges.GetEntryAtIndex (idx); 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (entry->GetRangeBase() == base_addr && entry->GetByteSize() == byte_size) 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return m_invalid_ranges.RemoveEntrtAtIndex (idx); 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)size_t 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)MemoryCache::Read (addr_t addr, 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void *dst, 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t dst_len, 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Error &error) 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t bytes_left = dst_len; 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (dst && bytes_left > 0) 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint32_t cache_line_byte_size = m_cache_line_byte_size; 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint8_t *dst_buf = (uint8_t *)dst; 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) addr_t curr_addr = addr - (addr % cache_line_byte_size); 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) addr_t cache_offset = addr - curr_addr; 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Mutex::Locker locker (m_mutex); 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (bytes_left > 0) 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (m_invalid_ranges.FindEntryThatContains(curr_addr)) 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64, curr_addr); 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return dst_len - bytes_left; 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BlockMap::const_iterator pos = m_cache.find (curr_addr); 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BlockMap::const_iterator end = m_cache.end (); 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (pos != end) 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t curr_read_size = cache_line_byte_size - cache_offset; 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (curr_read_size > bytes_left) 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) curr_read_size = bytes_left; 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy (dst_buf + dst_len - bytes_left, pos->second->GetBytes() + cache_offset, curr_read_size); 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bytes_left -= curr_read_size; 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) curr_addr += curr_read_size + cache_offset; 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cache_offset = 0; 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (bytes_left > 0) 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Get sequential cache page hits 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (++pos; (pos != end) && (bytes_left > 0); ++pos) 1572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) { 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) assert ((curr_addr % cache_line_byte_size) == 0); 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (pos->first != curr_addr) 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) curr_read_size = pos->second->GetByteSize(); 1642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (curr_read_size > bytes_left) 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) curr_read_size = bytes_left; 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy (dst_buf + dst_len - bytes_left, pos->second->GetBytes(), curr_read_size); 168cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bytes_left -= curr_read_size; 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) curr_addr += curr_read_size; 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We have a cache page that succeeded to read some bytes 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // but not an entire page. If this happens, we must cap 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // off how much data we are able to read... 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (pos->second->GetByteSize() != cache_line_byte_size) 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return dst_len - bytes_left; 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We need to read from the process 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (bytes_left > 0) 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) assert ((curr_addr % cache_line_byte_size) == 0); 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::unique_ptr<DataBufferHeap> data_buffer_heap_ap(new DataBufferHeap (cache_line_byte_size, 0)); 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t process_bytes_read = m_process.ReadMemoryFromInferior (curr_addr, 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) data_buffer_heap_ap->GetBytes(), 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) data_buffer_heap_ap->GetByteSize(), 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) error); 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (process_bytes_read == 0) 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return dst_len - bytes_left; 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (process_bytes_read != cache_line_byte_size) 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) data_buffer_heap_ap->SetByteSize (process_bytes_read); 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_cache[curr_addr] = DataBufferSP (data_buffer_heap_ap.release()); 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We have read data and put it into the cache, continue through the 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // loop again to get the data out of the cache... 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return dst_len - bytes_left; 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AllocatedBlock::AllocatedBlock (lldb::addr_t addr, 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t byte_size, 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t permissions, 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t chunk_size) : 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_addr (addr), 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_byte_size (byte_size), 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_permissions (permissions), 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_chunk_size (chunk_size), 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_offset_to_chunk_size () 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// m_allocated (byte_size / chunk_size) 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) assert (byte_size > chunk_size); 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AllocatedBlock::~AllocatedBlock () 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)lldb::addr_t 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AllocatedBlock::ReserveBlock (uint32_t size) 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) addr_t addr = LLDB_INVALID_ADDRESS; 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (size <= m_byte_size) 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint32_t needed_chunks = CalculateChunksNeededForSize (size); 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_VERBOSE)); 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (m_offset_to_chunk_size.empty()) 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_offset_to_chunk_size[0] = needed_chunks; 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (log) 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) log->Printf ("[1] AllocatedBlock::ReserveBlock (size = %u (0x%x)) => offset = 0x%x, %u %u bit chunks", size, size, 0, needed_chunks, m_chunk_size); 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) addr = m_addr; 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t last_offset = 0; 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OffsetToChunkSize::const_iterator pos = m_offset_to_chunk_size.begin(); 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OffsetToChunkSize::const_iterator end = m_offset_to_chunk_size.end(); 2477dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch while (pos != end) 2487dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch { 2497dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch if (pos->first > last_offset) 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint32_t bytes_available = pos->first - last_offset; 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint32_t num_chunks = CalculateChunksNeededForSize (bytes_available); 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (num_chunks >= needed_chunks) 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_offset_to_chunk_size[last_offset] = needed_chunks; 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (log) 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) log->Printf ("[2] AllocatedBlock::ReserveBlock (size = %u (0x%x)) => offset = 0x%x, %u %u bit chunks", size, size, last_offset, needed_chunks, m_chunk_size); 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) addr = m_addr + last_offset; 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) last_offset = pos->first + pos->second * m_chunk_size; 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (++pos == end) 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Last entry... 268 const uint32_t chunks_left = CalculateChunksNeededForSize (m_byte_size - last_offset); 269 if (chunks_left >= needed_chunks) 270 { 271 m_offset_to_chunk_size[last_offset] = needed_chunks; 272 if (log) 273 log->Printf ("[3] AllocatedBlock::ReserveBlock (size = %u (0x%x)) => offset = 0x%x, %u %u bit chunks", size, size, last_offset, needed_chunks, m_chunk_size); 274 addr = m_addr + last_offset; 275 break; 276 } 277 } 278 } 279 } 280// const uint32_t total_chunks = m_allocated.size (); 281// uint32_t unallocated_idx = 0; 282// uint32_t allocated_idx = m_allocated.find_first(); 283// uint32_t first_chunk_idx = UINT32_MAX; 284// uint32_t num_chunks; 285// while (1) 286// { 287// if (allocated_idx == UINT32_MAX) 288// { 289// // No more bits are set starting from unallocated_idx, so we 290// // either have enough chunks for the request, or we don't. 291// // Eiter way we break out of the while loop... 292// num_chunks = total_chunks - unallocated_idx; 293// if (needed_chunks <= num_chunks) 294// first_chunk_idx = unallocated_idx; 295// break; 296// } 297// else if (allocated_idx > unallocated_idx) 298// { 299// // We have some allocated chunks, check if there are enough 300// // free chunks to satisfy the request? 301// num_chunks = allocated_idx - unallocated_idx; 302// if (needed_chunks <= num_chunks) 303// { 304// // Yep, we have enough! 305// first_chunk_idx = unallocated_idx; 306// break; 307// } 308// } 309// 310// while (unallocated_idx < total_chunks) 311// { 312// if (m_allocated[unallocated_idx]) 313// ++unallocated_idx; 314// else 315// break; 316// } 317// 318// if (unallocated_idx >= total_chunks) 319// break; 320// 321// allocated_idx = m_allocated.find_next(unallocated_idx); 322// } 323// 324// if (first_chunk_idx != UINT32_MAX) 325// { 326// const uint32_t end_bit_idx = unallocated_idx + needed_chunks; 327// for (uint32_t idx = first_chunk_idx; idx < end_bit_idx; ++idx) 328// m_allocated.set(idx); 329// return m_addr + m_chunk_size * first_chunk_idx; 330// } 331 } 332 Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_VERBOSE)); 333 if (log) 334 log->Printf ("AllocatedBlock::ReserveBlock (size = %u (0x%x)) => 0x%16.16" PRIx64, size, size, (uint64_t)addr); 335 return addr; 336} 337 338bool 339AllocatedBlock::FreeBlock (addr_t addr) 340{ 341 uint32_t offset = addr - m_addr; 342 OffsetToChunkSize::iterator pos = m_offset_to_chunk_size.find (offset); 343 bool success = false; 344 if (pos != m_offset_to_chunk_size.end()) 345 { 346 m_offset_to_chunk_size.erase (pos); 347 success = true; 348 } 349 Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_VERBOSE)); 350 if (log) 351 log->Printf ("AllocatedBlock::FreeBlock (addr = 0x%16.16" PRIx64 ") => %i", (uint64_t)addr, success); 352 return success; 353} 354 355 356AllocatedMemoryCache::AllocatedMemoryCache (Process &process) : 357 m_process (process), 358 m_mutex (Mutex::eMutexTypeRecursive), 359 m_memory_map() 360{ 361} 362 363AllocatedMemoryCache::~AllocatedMemoryCache () 364{ 365} 366 367 368void 369AllocatedMemoryCache::Clear() 370{ 371 Mutex::Locker locker (m_mutex); 372 if (m_process.IsAlive()) 373 { 374 PermissionsToBlockMap::iterator pos, end = m_memory_map.end(); 375 for (pos = m_memory_map.begin(); pos != end; ++pos) 376 m_process.DoDeallocateMemory(pos->second->GetBaseAddress()); 377 } 378 m_memory_map.clear(); 379} 380 381 382AllocatedMemoryCache::AllocatedBlockSP 383AllocatedMemoryCache::AllocatePage (uint32_t byte_size, 384 uint32_t permissions, 385 uint32_t chunk_size, 386 Error &error) 387{ 388 AllocatedBlockSP block_sp; 389 const size_t page_size = 4096; 390 const size_t num_pages = (byte_size + page_size - 1) / page_size; 391 const size_t page_byte_size = num_pages * page_size; 392 393 addr_t addr = m_process.DoAllocateMemory(page_byte_size, permissions, error); 394 395 Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 396 if (log) 397 { 398 log->Printf ("Process::DoAllocateMemory (byte_size = 0x%8.8zx, permissions = %s) => 0x%16.16" PRIx64, 399 page_byte_size, 400 GetPermissionsAsCString(permissions), 401 (uint64_t)addr); 402 } 403 404 if (addr != LLDB_INVALID_ADDRESS) 405 { 406 block_sp.reset (new AllocatedBlock (addr, page_byte_size, permissions, chunk_size)); 407 m_memory_map.insert (std::make_pair (permissions, block_sp)); 408 } 409 return block_sp; 410} 411 412lldb::addr_t 413AllocatedMemoryCache::AllocateMemory (size_t byte_size, 414 uint32_t permissions, 415 Error &error) 416{ 417 Mutex::Locker locker (m_mutex); 418 419 addr_t addr = LLDB_INVALID_ADDRESS; 420 std::pair<PermissionsToBlockMap::iterator, PermissionsToBlockMap::iterator> range = m_memory_map.equal_range (permissions); 421 422 for (PermissionsToBlockMap::iterator pos = range.first; pos != range.second; ++pos) 423 { 424 addr = (*pos).second->ReserveBlock (byte_size); 425 } 426 427 if (addr == LLDB_INVALID_ADDRESS) 428 { 429 AllocatedBlockSP block_sp (AllocatePage (byte_size, permissions, 16, error)); 430 431 if (block_sp) 432 addr = block_sp->ReserveBlock (byte_size); 433 } 434 Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 435 if (log) 436 log->Printf ("AllocatedMemoryCache::AllocateMemory (byte_size = 0x%8.8zx, permissions = %s) => 0x%16.16" PRIx64, byte_size, GetPermissionsAsCString(permissions), (uint64_t)addr); 437 return addr; 438} 439 440bool 441AllocatedMemoryCache::DeallocateMemory (lldb::addr_t addr) 442{ 443 Mutex::Locker locker (m_mutex); 444 445 PermissionsToBlockMap::iterator pos, end = m_memory_map.end(); 446 bool success = false; 447 for (pos = m_memory_map.begin(); pos != end; ++pos) 448 { 449 if (pos->second->Contains (addr)) 450 { 451 success = pos->second->FreeBlock (addr); 452 break; 453 } 454 } 455 Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS)); 456 if (log) 457 log->Printf("AllocatedMemoryCache::DeallocateMemory (addr = 0x%16.16" PRIx64 ") => %i", (uint64_t)addr, success); 458 return success; 459} 460 461 462