SectionLoadList.cpp revision 545762f7780bece4e9255e052c0a50a1ea66ce57
1//===-- SectionLoadList.cpp -------------------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10#include "lldb/Target/SectionLoadList.h" 11 12// C Includes 13// C++ Includes 14// Other libraries and framework includes 15// Project includes 16#include "lldb/Core/Log.h" 17#include "lldb/Core/Module.h" 18#include "lldb/Core/Section.h" 19#include "lldb/Core/Stream.h" 20#include "lldb/Symbol/Block.h" 21#include "lldb/Symbol/Symbol.h" 22#include "lldb/Symbol/SymbolContext.h" 23 24using namespace lldb; 25using namespace lldb_private; 26 27 28bool 29SectionLoadList::IsEmpty() const 30{ 31 Mutex::Locker locker(m_mutex); 32 return m_addr_to_sect.empty(); 33} 34 35void 36SectionLoadList::Clear () 37{ 38 Mutex::Locker locker(m_mutex); 39 m_addr_to_sect.clear(); 40 m_sect_to_addr.clear(); 41} 42 43addr_t 44SectionLoadList::GetSectionLoadAddress (const lldb::SectionSP §ion) const 45{ 46 // TODO: add support for the same section having multiple load addresses 47 addr_t section_load_addr = LLDB_INVALID_ADDRESS; 48 if (section) 49 { 50 Mutex::Locker locker(m_mutex); 51 sect_to_addr_collection::const_iterator pos = m_sect_to_addr.find (section.get()); 52 53 if (pos != m_sect_to_addr.end()) 54 section_load_addr = pos->second; 55 } 56 return section_load_addr; 57} 58 59bool 60SectionLoadList::SetSectionLoadAddress (const lldb::SectionSP §ion, addr_t load_addr, bool warn_multiple) 61{ 62 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER | LIBLLDB_LOG_VERBOSE)); 63 64 if (log) 65 { 66 const FileSpec &module_file_spec (section->GetModule()->GetFileSpec()); 67 log->Printf ("SectionLoadList::%s (section = %p (%s%s%s.%s), load_addr = 0x%16.16llx)", 68 __FUNCTION__, 69 section.get(), 70 module_file_spec.GetDirectory().AsCString(), 71 module_file_spec.GetDirectory() ? "/" : "", 72 module_file_spec.GetFilename().AsCString(), 73 section->GetName().AsCString(), 74 load_addr); 75 } 76 77 if (section->GetByteSize() == 0) 78 return false; // No change 79 80 // Fill in the section -> load_addr map 81 Mutex::Locker locker(m_mutex); 82 sect_to_addr_collection::iterator sta_pos = m_sect_to_addr.find(section.get()); 83 if (sta_pos != m_sect_to_addr.end()) 84 { 85 if (load_addr == sta_pos->second) 86 return false; // No change... 87 else 88 sta_pos->second = load_addr; 89 } 90 else 91 m_sect_to_addr[section.get()] = load_addr; 92 93 // Fill in the load_addr -> section map 94 addr_to_sect_collection::iterator ats_pos = m_addr_to_sect.find(load_addr); 95 if (ats_pos != m_addr_to_sect.end()) 96 { 97 // Some sections are ok to overlap, and for others we should warn. When 98 // we have multiple load addresses that correspond to a section, we will 99 // allways attribute the section to the be last section that claims it 100 // exists at that address. Sometimes it is ok for more that one section 101 // to be loaded at a specific load address, and other times it isn't. 102 // The "warn_multiple" parameter tells us if we should warn in this case 103 // or not. The DynamicLoader plug-in subclasses should know which 104 // sections should warn and which shouldn't (darwin shared cache modules 105 // all shared the same "__LINKEDIT" sections, so the dynamic loader can 106 // pass false for "warn_multiple"). 107 if (warn_multiple && section != ats_pos->second) 108 { 109 ModuleSP module_sp (section->GetModule()); 110 if (module_sp) 111 { 112 module_sp->ReportWarning ("address 0x%16.16llx maps to more than one section: %s.%s and %s.%s", 113 load_addr, 114 module_sp->GetFileSpec().GetFilename().GetCString(), 115 section->GetName().GetCString(), 116 ats_pos->second->GetModule()->GetFileSpec().GetFilename().GetCString(), 117 ats_pos->second->GetName().GetCString()); 118 } 119 } 120 ats_pos->second = section; 121 } 122 else 123 m_addr_to_sect[load_addr] = section; 124 125 return true; // Changed 126} 127 128size_t 129SectionLoadList::SetSectionUnloaded (const lldb::SectionSP §ion_sp) 130{ 131 size_t unload_count = 0; 132 133 if (section_sp) 134 { 135 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER | LIBLLDB_LOG_VERBOSE)); 136 137 if (log) 138 { 139 const FileSpec &module_file_spec (section_sp->GetModule()->GetFileSpec()); 140 log->Printf ("SectionLoadList::%s (section = %p (%s%s%s.%s))", 141 __FUNCTION__, 142 section_sp.get(), 143 module_file_spec.GetDirectory().AsCString(), 144 module_file_spec.GetDirectory() ? "/" : "", 145 module_file_spec.GetFilename().AsCString(), 146 section_sp->GetName().AsCString()); 147 } 148 149 Mutex::Locker locker(m_mutex); 150 151 sect_to_addr_collection::iterator sta_pos = m_sect_to_addr.find(section_sp.get()); 152 if (sta_pos != m_sect_to_addr.end()) 153 { 154 addr_t load_addr = sta_pos->second; 155 m_sect_to_addr.erase (sta_pos); 156 157 addr_to_sect_collection::iterator ats_pos = m_addr_to_sect.find(load_addr); 158 if (ats_pos != m_addr_to_sect.end()) 159 m_addr_to_sect.erase (ats_pos); 160 } 161 } 162 return unload_count; 163} 164 165bool 166SectionLoadList::SetSectionUnloaded (const lldb::SectionSP §ion_sp, addr_t load_addr) 167{ 168 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER | LIBLLDB_LOG_VERBOSE)); 169 170 if (log) 171 { 172 const FileSpec &module_file_spec (section_sp->GetModule()->GetFileSpec()); 173 log->Printf ("SectionLoadList::%s (section = %p (%s%s%s.%s), load_addr = 0x%16.16llx)", 174 __FUNCTION__, 175 section_sp.get(), 176 module_file_spec.GetDirectory().AsCString(), 177 module_file_spec.GetDirectory() ? "/" : "", 178 module_file_spec.GetFilename().AsCString(), 179 section_sp->GetName().AsCString(), 180 load_addr); 181 } 182 bool erased = false; 183 Mutex::Locker locker(m_mutex); 184 sect_to_addr_collection::iterator sta_pos = m_sect_to_addr.find(section_sp.get()); 185 if (sta_pos != m_sect_to_addr.end()) 186 { 187 erased = true; 188 m_sect_to_addr.erase (sta_pos); 189 } 190 191 addr_to_sect_collection::iterator ats_pos = m_addr_to_sect.find(load_addr); 192 if (ats_pos != m_addr_to_sect.end()) 193 { 194 erased = true; 195 m_addr_to_sect.erase (ats_pos); 196 } 197 198 return erased; 199} 200 201 202bool 203SectionLoadList::ResolveLoadAddress (addr_t load_addr, Address &so_addr) const 204{ 205 // First find the top level section that this load address exists in 206 Mutex::Locker locker(m_mutex); 207 if (!m_addr_to_sect.empty()) 208 { 209 addr_to_sect_collection::const_iterator pos = m_addr_to_sect.lower_bound (load_addr); 210 if (pos != m_addr_to_sect.end()) 211 { 212 if (load_addr != pos->first && pos != m_addr_to_sect.begin()) 213 --pos; 214 if (load_addr >= pos->first) 215 { 216 addr_t offset = load_addr - pos->first; 217 if (offset < pos->second->GetByteSize()) 218 { 219 // We have found the top level section, now we need to find the 220 // deepest child section. 221 return pos->second->ResolveContainedAddress (offset, so_addr); 222 } 223 } 224 } 225 else 226 { 227 // There are no entries that have an address that is >= load_addr, 228 // so we need to check the last entry on our collection. 229 addr_to_sect_collection::const_reverse_iterator rpos = m_addr_to_sect.rbegin(); 230 if (load_addr >= rpos->first) 231 { 232 addr_t offset = load_addr - rpos->first; 233 if (offset < rpos->second->GetByteSize()) 234 { 235 // We have found the top level section, now we need to find the 236 // deepest child section. 237 return rpos->second->ResolveContainedAddress (offset, so_addr); 238 } 239 } 240 } 241 } 242 so_addr.Clear(); 243 return false; 244} 245 246void 247SectionLoadList::Dump (Stream &s, Target *target) 248{ 249 Mutex::Locker locker(m_mutex); 250 addr_to_sect_collection::const_iterator pos, end; 251 for (pos = m_addr_to_sect.begin(), end = m_addr_to_sect.end(); pos != end; ++pos) 252 { 253 s.Printf("addr = 0x%16.16llx, section = %p: ", pos->first, pos->second.get()); 254 pos->second->Dump (&s, target, 0); 255 } 256} 257 258 259