diff options
Diffstat (limited to 'contrib/llvm/tools/lldb/source/Plugins/DynamicLoader')
8 files changed, 1806 insertions, 0 deletions
diff --git a/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.cpp b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.cpp new file mode 100644 index 0000000..2604ae6 --- /dev/null +++ b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.cpp @@ -0,0 +1,177 @@ +//===-- AuxVector.cpp -------------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// C Includes +#include <fcntl.h> +#include <sys/stat.h> +#include <sys/types.h> + +// C++ Includes +// Other libraries and framework includes +#include "lldb/Core/DataBufferHeap.h" +#include "lldb/Core/DataExtractor.h" +#include "lldb/Core/Log.h" +#include "lldb/Target/Process.h" + +#if defined(__linux__) or defined(__FreeBSD__) +#include "Plugins/Process/elf-core/ProcessElfCore.h" +#endif + +#include "AuxVector.h" + +using namespace lldb; +using namespace lldb_private; + +static bool +GetMaxU64(DataExtractor &data, + lldb::offset_t *offset_ptr, + uint64_t *value, + unsigned int byte_size) +{ + lldb::offset_t saved_offset = *offset_ptr; + *value = data.GetMaxU64(offset_ptr, byte_size); + return *offset_ptr != saved_offset; +} + +static bool +ParseAuxvEntry(DataExtractor &data, + AuxVector::Entry &entry, + lldb::offset_t *offset_ptr, + unsigned int byte_size) +{ + if (!GetMaxU64(data, offset_ptr, &entry.type, byte_size)) + return false; + + if (!GetMaxU64(data, offset_ptr, &entry.value, byte_size)) + return false; + + return true; +} + +DataBufferSP +AuxVector::GetAuxvData() +{ +#if defined(__linux__) or defined(__FreeBSD__) + if (m_process->GetPluginName() == ProcessElfCore::GetPluginNameStatic()) + return static_cast<ProcessElfCore *>(m_process)->GetAuxvData(); +#endif + return lldb_private::Host::GetAuxvData(m_process); +} + +void +AuxVector::ParseAuxv(DataExtractor &data) +{ + const unsigned int byte_size = m_process->GetAddressByteSize(); + lldb::offset_t offset = 0; + + for (;;) + { + Entry entry; + + if (!ParseAuxvEntry(data, entry, &offset, byte_size)) + break; + + if (entry.type == AT_NULL) + break; + + if (entry.type == AT_IGNORE) + continue; + + m_auxv.push_back(entry); + } +} + +AuxVector::AuxVector(Process *process) + : m_process(process) +{ + DataExtractor data; + Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); + + data.SetData(GetAuxvData()); + data.SetByteOrder(m_process->GetByteOrder()); + data.SetAddressByteSize(m_process->GetAddressByteSize()); + + ParseAuxv(data); + + if (log) + DumpToLog(log); +} + +AuxVector::iterator +AuxVector::FindEntry(EntryType type) const +{ + for (iterator I = begin(); I != end(); ++I) + { + if (I->type == static_cast<uint64_t>(type)) + return I; + } + + return end(); +} + +void +AuxVector::DumpToLog(Log *log) const +{ + if (!log) + return; + + log->PutCString("AuxVector: "); + for (iterator I = begin(); I != end(); ++I) + { + log->Printf(" %s [%" PRIu64 "]: %" PRIx64, GetEntryName(*I), I->type, I->value); + } +} + +const char * +AuxVector::GetEntryName(EntryType type) +{ + const char *name = "AT_???"; + +#define ENTRY_NAME(_type) _type: name = #_type + switch (type) + { + case ENTRY_NAME(AT_NULL); break; + case ENTRY_NAME(AT_IGNORE); break; + case ENTRY_NAME(AT_EXECFD); break; + case ENTRY_NAME(AT_PHDR); break; + case ENTRY_NAME(AT_PHENT); break; + case ENTRY_NAME(AT_PHNUM); break; + case ENTRY_NAME(AT_PAGESZ); break; + case ENTRY_NAME(AT_BASE); break; + case ENTRY_NAME(AT_FLAGS); break; + case ENTRY_NAME(AT_ENTRY); break; + case ENTRY_NAME(AT_NOTELF); break; + case ENTRY_NAME(AT_UID); break; + case ENTRY_NAME(AT_EUID); break; + case ENTRY_NAME(AT_GID); break; + case ENTRY_NAME(AT_EGID); break; + case ENTRY_NAME(AT_CLKTCK); break; + case ENTRY_NAME(AT_PLATFORM); break; + case ENTRY_NAME(AT_HWCAP); break; + case ENTRY_NAME(AT_FPUCW); break; + case ENTRY_NAME(AT_DCACHEBSIZE); break; + case ENTRY_NAME(AT_ICACHEBSIZE); break; + case ENTRY_NAME(AT_UCACHEBSIZE); break; + case ENTRY_NAME(AT_IGNOREPPC); break; + case ENTRY_NAME(AT_SECURE); break; + case ENTRY_NAME(AT_BASE_PLATFORM); break; + case ENTRY_NAME(AT_RANDOM); break; + case ENTRY_NAME(AT_EXECFN); break; + case ENTRY_NAME(AT_SYSINFO); break; + case ENTRY_NAME(AT_SYSINFO_EHDR); break; + case ENTRY_NAME(AT_L1I_CACHESHAPE); break; + case ENTRY_NAME(AT_L1D_CACHESHAPE); break; + case ENTRY_NAME(AT_L2_CACHESHAPE); break; + case ENTRY_NAME(AT_L3_CACHESHAPE); break; + } +#undef ENTRY_NAME + + return name; +} + diff --git a/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.h b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.h new file mode 100644 index 0000000..2d39edd --- /dev/null +++ b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.h @@ -0,0 +1,115 @@ +//===-- AuxVector.h ---------------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_AuxVector_H_ +#define liblldb_AuxVector_H_ + +// C Includes +// C++ Includes +#include <vector> + +// Other libraries and framework includes +#include "lldb/lldb-forward.h" + +namespace lldb_private { +class DataExtractor; +} + +/// @class AuxVector +/// @brief Represents a processes auxiliary vector. +/// +/// When a process is loaded on Linux a vector of values is placed onto the +/// stack communicating operating system specific information. On construction +/// this class locates and parses this information and provides a simple +/// read-only interface to the entries found. +class AuxVector { + +public: + AuxVector(lldb_private::Process *process); + + struct Entry { + uint64_t type; + uint64_t value; + + Entry() : type(0), value(0) { } + }; + + /// Constants describing the type of entry. + /// On Linux, running "LD_SHOW_AUXV=1 ./executable" will spew AUX information. + enum EntryType { + AT_NULL = 0, ///< End of auxv. + AT_IGNORE = 1, ///< Ignore entry. + AT_EXECFD = 2, ///< File descriptor of program. + AT_PHDR = 3, ///< Program headers. + AT_PHENT = 4, ///< Size of program header. + AT_PHNUM = 5, ///< Number of program headers. + AT_PAGESZ = 6, ///< Page size. + AT_BASE = 7, ///< Interpreter base address. + AT_FLAGS = 8, ///< Flags. + AT_ENTRY = 9, ///< Program entry point. + AT_NOTELF = 10, ///< Set if program is not an ELF. + AT_UID = 11, ///< UID. + AT_EUID = 12, ///< Effective UID. + AT_GID = 13, ///< GID. + AT_EGID = 14, ///< Effective GID. + AT_CLKTCK = 17, ///< Clock frequency (e.g. times(2)). + AT_PLATFORM = 15, ///< String identifying platform. + AT_HWCAP = 16, ///< Machine dependent hints about processor capabilities. + AT_FPUCW = 18, ///< Used FPU control word. + AT_DCACHEBSIZE = 19, ///< Data cache block size. + AT_ICACHEBSIZE = 20, ///< Instruction cache block size. + AT_UCACHEBSIZE = 21, ///< Unified cache block size. + AT_IGNOREPPC = 22, ///< Entry should be ignored. + AT_SECURE = 23, ///< Boolean, was exec setuid-like? + AT_BASE_PLATFORM = 24, ///< String identifying real platforms. + AT_RANDOM = 25, ///< Address of 16 random bytes. + AT_EXECFN = 31, ///< Filename of executable. + AT_SYSINFO = 32, ///< Pointer to the global system page used for system calls and other nice things. + AT_SYSINFO_EHDR = 33, + AT_L1I_CACHESHAPE = 34, ///< Shapes of the caches. + AT_L1D_CACHESHAPE = 35, + AT_L2_CACHESHAPE = 36, + AT_L3_CACHESHAPE = 37, + }; + +private: + typedef std::vector<Entry> EntryVector; + +public: + typedef EntryVector::const_iterator iterator; + + iterator begin() const { return m_auxv.begin(); } + iterator end() const { return m_auxv.end(); } + + iterator + FindEntry(EntryType type) const; + + static const char * + GetEntryName(const Entry &entry) { + return GetEntryName(static_cast<EntryType>(entry.type)); + } + + static const char * + GetEntryName(EntryType type); + + void + DumpToLog(lldb_private::Log *log) const; + +private: + lldb_private::Process *m_process; + EntryVector m_auxv; + + lldb::DataBufferSP + GetAuxvData(); + + void + ParseAuxv(lldb_private::DataExtractor &data); +}; + +#endif diff --git a/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.cpp b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.cpp new file mode 100644 index 0000000..3e1b529 --- /dev/null +++ b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.cpp @@ -0,0 +1,336 @@ +//===-- DYLDRendezvous.cpp --------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// C Includes +// C++ Includes +// Other libraries and framework includes +#include "lldb/Core/ArchSpec.h" +#include "lldb/Core/Error.h" +#include "lldb/Core/Log.h" +#include "lldb/Core/Module.h" +#include "lldb/Target/Process.h" +#include "lldb/Target/Target.h" + +#include "DYLDRendezvous.h" + +using namespace lldb; +using namespace lldb_private; + +/// Locates the address of the rendezvous structure. Returns the address on +/// success and LLDB_INVALID_ADDRESS on failure. +static addr_t +ResolveRendezvousAddress(Process *process) +{ + addr_t info_location; + addr_t info_addr; + Error error; + size_t size; + + info_location = process->GetImageInfoAddress(); + + if (info_location == LLDB_INVALID_ADDRESS) + return LLDB_INVALID_ADDRESS; + + info_addr = 0; + size = process->DoReadMemory(info_location, &info_addr, + process->GetAddressByteSize(), error); + if (size != process->GetAddressByteSize() || error.Fail()) + return LLDB_INVALID_ADDRESS; + + if (info_addr == 0) + return LLDB_INVALID_ADDRESS; + + return info_addr; +} + +DYLDRendezvous::DYLDRendezvous(Process *process) + : m_process(process), + m_rendezvous_addr(LLDB_INVALID_ADDRESS), + m_current(), + m_previous(), + m_soentries(), + m_added_soentries(), + m_removed_soentries() +{ + // Cache a copy of the executable path + if (m_process) + { + Module *exe_mod = m_process->GetTarget().GetExecutableModulePointer(); + if (exe_mod) + exe_mod->GetFileSpec().GetPath(m_exe_path, PATH_MAX); + } +} + +bool +DYLDRendezvous::Resolve() +{ + const size_t word_size = 4; + Rendezvous info; + size_t address_size; + size_t padding; + addr_t info_addr; + addr_t cursor; + + address_size = m_process->GetAddressByteSize(); + padding = address_size - word_size; + + if (m_rendezvous_addr == LLDB_INVALID_ADDRESS) + cursor = info_addr = ResolveRendezvousAddress(m_process); + else + cursor = info_addr = m_rendezvous_addr; + + if (cursor == LLDB_INVALID_ADDRESS) + return false; + + if (!(cursor = ReadMemory(cursor, &info.version, word_size))) + return false; + + if (!(cursor = ReadMemory(cursor + padding, &info.map_addr, address_size))) + return false; + + if (!(cursor = ReadMemory(cursor, &info.brk, address_size))) + return false; + + if (!(cursor = ReadMemory(cursor, &info.state, word_size))) + return false; + + if (!(cursor = ReadMemory(cursor + padding, &info.ldbase, address_size))) + return false; + + // The rendezvous was successfully read. Update our internal state. + m_rendezvous_addr = info_addr; + m_previous = m_current; + m_current = info; + + return UpdateSOEntries(); +} + +bool +DYLDRendezvous::IsValid() +{ + return m_rendezvous_addr != LLDB_INVALID_ADDRESS; +} + +bool +DYLDRendezvous::UpdateSOEntries() +{ + SOEntry entry; + + if (m_current.map_addr == 0) + return false; + + // When the previous and current states are consistent this is the first + // time we have been asked to update. Just take a snapshot of the currently + // loaded modules. + if (m_previous.state == eConsistent && m_current.state == eConsistent) + return TakeSnapshot(m_soentries); + + // If we are about to add or remove a shared object clear out the current + // state and take a snapshot of the currently loaded images. + if (m_current.state == eAdd || m_current.state == eDelete) + { + assert(m_previous.state == eConsistent); + m_soentries.clear(); + m_added_soentries.clear(); + m_removed_soentries.clear(); + return TakeSnapshot(m_soentries); + } + assert(m_current.state == eConsistent); + + // Otherwise check the previous state to determine what to expect and update + // accordingly. + if (m_previous.state == eAdd) + return UpdateSOEntriesForAddition(); + else if (m_previous.state == eDelete) + return UpdateSOEntriesForDeletion(); + + return false; +} + +bool +DYLDRendezvous::UpdateSOEntriesForAddition() +{ + SOEntry entry; + iterator pos; + + assert(m_previous.state == eAdd); + + if (m_current.map_addr == 0) + return false; + + for (addr_t cursor = m_current.map_addr; cursor != 0; cursor = entry.next) + { + if (!ReadSOEntryFromMemory(cursor, entry)) + return false; + + // Only add shared libraries and not the executable. + // On Linux this is indicated by an empty path in the entry. + // On FreeBSD it is the name of the executable. + if (entry.path.empty() || ::strcmp(entry.path.c_str(), m_exe_path) == 0) + continue; + + pos = std::find(m_soentries.begin(), m_soentries.end(), entry); + if (pos == m_soentries.end()) + { + m_soentries.push_back(entry); + m_added_soentries.push_back(entry); + } + } + + return true; +} + +bool +DYLDRendezvous::UpdateSOEntriesForDeletion() +{ + SOEntryList entry_list; + iterator pos; + + assert(m_previous.state == eDelete); + + if (!TakeSnapshot(entry_list)) + return false; + + for (iterator I = begin(); I != end(); ++I) + { + pos = std::find(entry_list.begin(), entry_list.end(), *I); + if (pos == entry_list.end()) + m_removed_soentries.push_back(*I); + } + + m_soentries = entry_list; + return true; +} + +bool +DYLDRendezvous::TakeSnapshot(SOEntryList &entry_list) +{ + SOEntry entry; + + if (m_current.map_addr == 0) + return false; + + for (addr_t cursor = m_current.map_addr; cursor != 0; cursor = entry.next) + { + if (!ReadSOEntryFromMemory(cursor, entry)) + return false; + + // Only add shared libraries and not the executable. + // On Linux this is indicated by an empty path in the entry. + // On FreeBSD it is the name of the executable. + if (entry.path.empty() || ::strcmp(entry.path.c_str(), m_exe_path) == 0) + continue; + + entry_list.push_back(entry); + } + + return true; +} + +addr_t +DYLDRendezvous::ReadMemory(addr_t addr, void *dst, size_t size) +{ + size_t bytes_read; + Error error; + + bytes_read = m_process->DoReadMemory(addr, dst, size, error); + if (bytes_read != size || error.Fail()) + return 0; + + return addr + bytes_read; +} + +std::string +DYLDRendezvous::ReadStringFromMemory(addr_t addr) +{ + std::string str; + Error error; + size_t size; + char c; + + if (addr == LLDB_INVALID_ADDRESS) + return std::string(); + + for (;;) { + size = m_process->DoReadMemory(addr, &c, 1, error); + if (size != 1 || error.Fail()) + return std::string(); + if (c == 0) + break; + else { + str.push_back(c); + addr++; + } + } + + return str; +} + +bool +DYLDRendezvous::ReadSOEntryFromMemory(lldb::addr_t addr, SOEntry &entry) +{ + size_t address_size = m_process->GetAddressByteSize(); + + entry.clear(); + + if (!(addr = ReadMemory(addr, &entry.base_addr, address_size))) + return false; + + if (!(addr = ReadMemory(addr, &entry.path_addr, address_size))) + return false; + + if (!(addr = ReadMemory(addr, &entry.dyn_addr, address_size))) + return false; + + if (!(addr = ReadMemory(addr, &entry.next, address_size))) + return false; + + if (!(addr = ReadMemory(addr, &entry.prev, address_size))) + return false; + + entry.path = ReadStringFromMemory(entry.path_addr); + + return true; +} + +void +DYLDRendezvous::DumpToLog(Log *log) const +{ + int state = GetState(); + + if (!log) + return; + + log->PutCString("DYLDRendezvous:"); + log->Printf(" Address: %" PRIx64, GetRendezvousAddress()); + log->Printf(" Version: %" PRIu64, GetVersion()); + log->Printf(" Link : %" PRIx64, GetLinkMapAddress()); + log->Printf(" Break : %" PRIx64, GetBreakAddress()); + log->Printf(" LDBase : %" PRIx64, GetLDBase()); + log->Printf(" State : %s", + (state == eConsistent) ? "consistent" : + (state == eAdd) ? "add" : + (state == eDelete) ? "delete" : "unknown"); + + iterator I = begin(); + iterator E = end(); + + if (I != E) + log->PutCString("DYLDRendezvous SOEntries:"); + + for (int i = 1; I != E; ++I, ++i) + { + log->Printf("\n SOEntry [%d] %s", i, I->path.c_str()); + log->Printf(" Base : %" PRIx64, I->base_addr); + log->Printf(" Path : %" PRIx64, I->path_addr); + log->Printf(" Dyn : %" PRIx64, I->dyn_addr); + log->Printf(" Next : %" PRIx64, I->next); + log->Printf(" Prev : %" PRIx64, I->prev); + } +} diff --git a/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.h b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.h new file mode 100644 index 0000000..67e7228 --- /dev/null +++ b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.h @@ -0,0 +1,230 @@ +//===-- DYLDRendezvous.h ----------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_Rendezvous_H_ +#define liblldb_Rendezvous_H_ + +// C Includes +// C++ Includes +#include <list> +#include <string> + +// Other libraries and framework includes +#include "lldb/lldb-defines.h" +#include "lldb/lldb-types.h" + +namespace lldb_private { +class Process; +} + +/// @class DYLDRendezvous +/// @brief Interface to the runtime linker. +/// +/// A structure is present in a processes memory space which is updated by the +/// runtime liker each time a module is loaded or unloaded. This class provides +/// an interface to this structure and maintains a consistent snapshot of the +/// currently loaded modules. +class DYLDRendezvous { + + // This structure is used to hold the contents of the debug rendezvous + // information (struct r_debug) as found in the inferiors memory. Note that + // the layout of this struct is not binary compatible, it is simply large + // enough to hold the information on both 32 and 64 bit platforms. + struct Rendezvous { + uint64_t version; + lldb::addr_t map_addr; + lldb::addr_t brk; + uint64_t state; + lldb::addr_t ldbase; + + Rendezvous() + : version(0), map_addr(0), brk(0), state(0), ldbase(0) { } + }; + +public: + DYLDRendezvous(lldb_private::Process *process); + + /// Update the internal snapshot of runtime linker rendezvous and recompute + /// the currently loaded modules. + /// + /// This method should be called once one start up, then once each time the + /// runtime linker enters the function given by GetBreakAddress(). + /// + /// @returns true on success and false on failure. + /// + /// @see GetBreakAddress(). + bool + Resolve(); + + /// @returns true if this rendezvous has been located in the inferiors + /// address space and false otherwise. + bool + IsValid(); + + /// @returns the address of the rendezvous structure in the inferiors + /// address space. + lldb::addr_t + GetRendezvousAddress() const { return m_rendezvous_addr; } + + /// @returns the version of the rendezvous protocol being used. + uint64_t + GetVersion() const { return m_current.version; } + + /// @returns address in the inferiors address space containing the linked + /// list of shared object descriptors. + lldb::addr_t + GetLinkMapAddress() const { return m_current.map_addr; } + + /// A breakpoint should be set at this address and Resolve called on each + /// hit. + /// + /// @returns the address of a function called by the runtime linker each + /// time a module is loaded/unloaded, or about to be loaded/unloaded. + /// + /// @see Resolve() + lldb::addr_t + GetBreakAddress() const { return m_current.brk; } + + /// Returns the current state of the rendezvous structure. + uint64_t + GetState() const { return m_current.state; } + + /// @returns the base address of the runtime linker in the inferiors address + /// space. + lldb::addr_t + GetLDBase() const { return m_current.ldbase; } + + /// @returns true if modules have been loaded into the inferior since the + /// last call to Resolve(). + bool + ModulesDidLoad() const { return !m_added_soentries.empty(); } + + /// @returns true if modules have been unloaded from the inferior since the + /// last call to Resolve(). + bool + ModulesDidUnload() const { return !m_removed_soentries.empty(); } + + void + DumpToLog(lldb_private::Log *log) const; + + /// @brief Constants describing the state of the rendezvous. + /// + /// @see GetState(). + enum RendezvousState { + eConsistent, + eAdd, + eDelete + }; + + /// @brief Structure representing the shared objects currently loaded into + /// the inferior process. + /// + /// This object is a rough analogue to the struct link_map object which + /// actually lives in the inferiors memory. + struct SOEntry { + lldb::addr_t base_addr; ///< Base address of the loaded object. + lldb::addr_t path_addr; ///< String naming the shared object. + lldb::addr_t dyn_addr; ///< Dynamic section of shared object. + lldb::addr_t next; ///< Address of next so_entry. + lldb::addr_t prev; ///< Address of previous so_entry. + std::string path; ///< File name of shared object. + + SOEntry() { clear(); } + + bool operator ==(const SOEntry &entry) { + return this->path == entry.path; + } + + void clear() { + base_addr = 0; + path_addr = 0; + dyn_addr = 0; + next = 0; + prev = 0; + path.clear(); + } + }; + +protected: + typedef std::list<SOEntry> SOEntryList; + +public: + typedef SOEntryList::const_iterator iterator; + + /// Iterators over all currently loaded modules. + iterator begin() const { return m_soentries.begin(); } + iterator end() const { return m_soentries.end(); } + + /// Iterators over all modules loaded into the inferior since the last call + /// to Resolve(). + iterator loaded_begin() const { return m_added_soentries.begin(); } + iterator loaded_end() const { return m_added_soentries.end(); } + + /// Iterators over all modules unloaded from the inferior since the last + /// call to Resolve(). + iterator unloaded_begin() const { return m_removed_soentries.begin(); } + iterator unloaded_end() const { return m_removed_soentries.end(); } + +protected: + lldb_private::Process *m_process; + + // Cached copy of executable pathname + char m_exe_path[PATH_MAX]; + + /// Location of the r_debug structure in the inferiors address space. + lldb::addr_t m_rendezvous_addr; + + /// Current and previous snapshots of the rendezvous structure. + Rendezvous m_current; + Rendezvous m_previous; + + /// List of SOEntry objects corresponding to the current link map state. + SOEntryList m_soentries; + + /// List of SOEntry's added to the link map since the last call to Resolve(). + SOEntryList m_added_soentries; + + /// List of SOEntry's removed from the link map since the last call to + /// Resolve(). + SOEntryList m_removed_soentries; + + /// Reads @p size bytes from the inferiors address space starting at @p + /// addr. + /// + /// @returns addr + size if the read was successful and false otherwise. + lldb::addr_t + ReadMemory(lldb::addr_t addr, void *dst, size_t size); + + /// Reads a null-terminated C string from the memory location starting at @p + /// addr. + std::string + ReadStringFromMemory(lldb::addr_t addr); + + /// Reads an SOEntry starting at @p addr. + bool + ReadSOEntryFromMemory(lldb::addr_t addr, SOEntry &entry); + + /// Updates the current set of SOEntries, the set of added entries, and the + /// set of removed entries. + bool + UpdateSOEntries(); + + bool + UpdateSOEntriesForAddition(); + + bool + UpdateSOEntriesForDeletion(); + + /// Reads the current list of shared objects according to the link map + /// supplied by the runtime linker. + bool + TakeSnapshot(SOEntryList &entry_list); +}; + +#endif diff --git a/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp new file mode 100644 index 0000000..91c7cd3 --- /dev/null +++ b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp @@ -0,0 +1,481 @@ +//===-- DynamicLoaderPOSIX.h ------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// C Includes +// C++ Includes +// Other libraries and framework includes +#include "lldb/Core/PluginManager.h" +#include "lldb/Core/Log.h" +#include "lldb/Core/Module.h" +#include "lldb/Core/ModuleSpec.h" +#include "lldb/Core/Section.h" +#include "lldb/Symbol/ObjectFile.h" +#include "lldb/Target/Process.h" +#include "lldb/Target/Target.h" +#include "lldb/Target/Thread.h" +#include "lldb/Target/ThreadPlanRunToAddress.h" +#include "lldb/Breakpoint/BreakpointLocation.h" + +#include "AuxVector.h" +#include "DynamicLoaderPOSIXDYLD.h" + +using namespace lldb; +using namespace lldb_private; + +void +DynamicLoaderPOSIXDYLD::Initialize() +{ + PluginManager::RegisterPlugin(GetPluginNameStatic(), + GetPluginDescriptionStatic(), + CreateInstance); +} + +void +DynamicLoaderPOSIXDYLD::Terminate() +{ +} + +lldb_private::ConstString +DynamicLoaderPOSIXDYLD::GetPluginName() +{ + return GetPluginNameStatic(); +} + +lldb_private::ConstString +DynamicLoaderPOSIXDYLD::GetPluginNameStatic() +{ + static ConstString g_name("linux-dyld"); + return g_name; +} + +const char * +DynamicLoaderPOSIXDYLD::GetPluginDescriptionStatic() +{ + return "Dynamic loader plug-in that watches for shared library " + "loads/unloads in POSIX processes."; +} + +void +DynamicLoaderPOSIXDYLD::GetPluginCommandHelp(const char *command, Stream *strm) +{ +} + +uint32_t +DynamicLoaderPOSIXDYLD::GetPluginVersion() +{ + return 1; +} + +DynamicLoader * +DynamicLoaderPOSIXDYLD::CreateInstance(Process *process, bool force) +{ + bool create = force; + if (!create) + { + const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple(); + if (triple_ref.getOS() == llvm::Triple::Linux || + triple_ref.getOS() == llvm::Triple::FreeBSD) + create = true; + } + + if (create) + return new DynamicLoaderPOSIXDYLD (process); + return NULL; +} + +DynamicLoaderPOSIXDYLD::DynamicLoaderPOSIXDYLD(Process *process) + : DynamicLoader(process), + m_rendezvous(process), + m_load_offset(LLDB_INVALID_ADDRESS), + m_entry_point(LLDB_INVALID_ADDRESS), + m_auxv(), + m_dyld_bid(LLDB_INVALID_BREAK_ID) +{ +} + +DynamicLoaderPOSIXDYLD::~DynamicLoaderPOSIXDYLD() +{ + if (m_dyld_bid != LLDB_INVALID_BREAK_ID) + { + m_process->GetTarget().RemoveBreakpointByID (m_dyld_bid); + m_dyld_bid = LLDB_INVALID_BREAK_ID; + } +} + +void +DynamicLoaderPOSIXDYLD::DidAttach() +{ + ModuleSP executable; + addr_t load_offset; + + m_auxv.reset(new AuxVector(m_process)); + + executable = GetTargetExecutable(); + load_offset = ComputeLoadOffset(); + + if (executable.get() && load_offset != LLDB_INVALID_ADDRESS) + { + ModuleList module_list; + module_list.Append(executable); + UpdateLoadedSections(executable, load_offset); + LoadAllCurrentModules(); + m_process->GetTarget().ModulesDidLoad(module_list); + } +} + +void +DynamicLoaderPOSIXDYLD::DidLaunch() +{ + ModuleSP executable; + addr_t load_offset; + + m_auxv.reset(new AuxVector(m_process)); + + executable = GetTargetExecutable(); + load_offset = ComputeLoadOffset(); + + if (executable.get() && load_offset != LLDB_INVALID_ADDRESS) + { + ModuleList module_list; + module_list.Append(executable); + UpdateLoadedSections(executable, load_offset); + ProbeEntry(); + m_process->GetTarget().ModulesDidLoad(module_list); + } +} + +ModuleSP +DynamicLoaderPOSIXDYLD::GetTargetExecutable() +{ + Target &target = m_process->GetTarget(); + ModuleSP executable = target.GetExecutableModule(); + + if (executable.get()) + { + if (executable->GetFileSpec().Exists()) + { + ModuleSpec module_spec (executable->GetFileSpec(), executable->GetArchitecture()); + ModuleSP module_sp (new Module (module_spec)); + + // Check if the executable has changed and set it to the target executable if they differ. + if (module_sp.get() && module_sp->GetUUID().IsValid() && executable->GetUUID().IsValid()) + { + if (module_sp->GetUUID() != executable->GetUUID()) + executable.reset(); + } + else if (executable->FileHasChanged()) + { + executable.reset(); + } + + if (!executable.get()) + { + executable = target.GetSharedModule(module_spec); + if (executable.get() != target.GetExecutableModulePointer()) + { + // Don't load dependent images since we are in dyld where we will know + // and find out about all images that are loaded + const bool get_dependent_images = false; + target.SetExecutableModule(executable, get_dependent_images); + } + } + } + } + return executable; +} + +Error +DynamicLoaderPOSIXDYLD::ExecutePluginCommand(Args &command, Stream *strm) +{ + return Error(); +} + +Log * +DynamicLoaderPOSIXDYLD::EnablePluginLogging(Stream *strm, Args &command) +{ + return NULL; +} + +Error +DynamicLoaderPOSIXDYLD::CanLoadImage() +{ + return Error(); +} + +void +DynamicLoaderPOSIXDYLD::UpdateLoadedSections(ModuleSP module, addr_t base_addr) +{ + ObjectFile *obj_file = module->GetObjectFile(); + SectionList *sections = obj_file->GetSectionList(); + SectionLoadList &load_list = m_process->GetTarget().GetSectionLoadList(); + const size_t num_sections = sections->GetSize(); + + for (unsigned i = 0; i < num_sections; ++i) + { + SectionSP section_sp (sections->GetSectionAtIndex(i)); + lldb::addr_t new_load_addr = section_sp->GetFileAddress() + base_addr; + lldb::addr_t old_load_addr = load_list.GetSectionLoadAddress(section_sp); + + // If the file address of the section is zero then this is not an + // allocatable/loadable section (property of ELF sh_addr). Skip it. + if (new_load_addr == base_addr) + continue; + + if (old_load_addr == LLDB_INVALID_ADDRESS || + old_load_addr != new_load_addr) + load_list.SetSectionLoadAddress(section_sp, new_load_addr); + } +} + +void +DynamicLoaderPOSIXDYLD::ProbeEntry() +{ + Breakpoint *entry_break; + addr_t entry; + + if ((entry = GetEntryPoint()) == LLDB_INVALID_ADDRESS) + return; + + entry_break = m_process->GetTarget().CreateBreakpoint(entry, true).get(); + entry_break->SetCallback(EntryBreakpointHit, this, true); + entry_break->SetBreakpointKind("shared-library-event"); +} + +// The runtime linker has run and initialized the rendezvous structure once the +// process has hit its entry point. When we hit the corresponding breakpoint we +// interrogate the rendezvous structure to get the load addresses of all +// dependent modules for the process. Similarly, we can discover the runtime +// linker function and setup a breakpoint to notify us of any dynamically loaded +// modules (via dlopen). +bool +DynamicLoaderPOSIXDYLD::EntryBreakpointHit(void *baton, + StoppointCallbackContext *context, + user_id_t break_id, + user_id_t break_loc_id) +{ + DynamicLoaderPOSIXDYLD* dyld_instance; + + dyld_instance = static_cast<DynamicLoaderPOSIXDYLD*>(baton); + dyld_instance->LoadAllCurrentModules(); + dyld_instance->SetRendezvousBreakpoint(); + return false; // Continue running. +} + +void +DynamicLoaderPOSIXDYLD::SetRendezvousBreakpoint() +{ + addr_t break_addr = m_rendezvous.GetBreakAddress(); + Target &target = m_process->GetTarget(); + + if (m_dyld_bid == LLDB_INVALID_BREAK_ID) + { + Breakpoint *dyld_break = target.CreateBreakpoint (break_addr, true).get(); + dyld_break->SetCallback(RendezvousBreakpointHit, this, true); + dyld_break->SetBreakpointKind ("shared-library-event"); + m_dyld_bid = dyld_break->GetID(); + } + + // Make sure our breakpoint is at the right address. + assert (target.GetBreakpointByID(m_dyld_bid)->FindLocationByAddress(break_addr)->GetBreakpoint().GetID() == m_dyld_bid); +} + +bool +DynamicLoaderPOSIXDYLD::RendezvousBreakpointHit(void *baton, + StoppointCallbackContext *context, + user_id_t break_id, + user_id_t break_loc_id) +{ + DynamicLoaderPOSIXDYLD* dyld_instance; + + dyld_instance = static_cast<DynamicLoaderPOSIXDYLD*>(baton); + dyld_instance->RefreshModules(); + + // Return true to stop the target, false to just let the target run. + return dyld_instance->GetStopWhenImagesChange(); +} + +void +DynamicLoaderPOSIXDYLD::RefreshModules() +{ + if (!m_rendezvous.Resolve()) + return; + + DYLDRendezvous::iterator I; + DYLDRendezvous::iterator E; + + ModuleList &loaded_modules = m_process->GetTarget().GetImages(); + + if (m_rendezvous.ModulesDidLoad()) + { + ModuleList new_modules; + + E = m_rendezvous.loaded_end(); + for (I = m_rendezvous.loaded_begin(); I != E; ++I) + { + FileSpec file(I->path.c_str(), true); + ModuleSP module_sp = LoadModuleAtAddress(file, I->base_addr); + if (module_sp.get()) + loaded_modules.AppendIfNeeded(module_sp); + } + } + + if (m_rendezvous.ModulesDidUnload()) + { + ModuleList old_modules; + + E = m_rendezvous.unloaded_end(); + for (I = m_rendezvous.unloaded_begin(); I != E; ++I) + { + FileSpec file(I->path.c_str(), true); + ModuleSpec module_spec (file); + ModuleSP module_sp = + loaded_modules.FindFirstModule (module_spec); + if (module_sp.get()) + old_modules.Append(module_sp); + } + loaded_modules.Remove(old_modules); + } +} + +ThreadPlanSP +DynamicLoaderPOSIXDYLD::GetStepThroughTrampolinePlan(Thread &thread, bool stop) +{ + ThreadPlanSP thread_plan_sp; + + StackFrame *frame = thread.GetStackFrameAtIndex(0).get(); + const SymbolContext &context = frame->GetSymbolContext(eSymbolContextSymbol); + Symbol *sym = context.symbol; + + if (sym == NULL || !sym->IsTrampoline()) + return thread_plan_sp; + + const ConstString &sym_name = sym->GetMangled().GetName(Mangled::ePreferMangled); + if (!sym_name) + return thread_plan_sp; + + SymbolContextList target_symbols; + Target &target = thread.GetProcess()->GetTarget(); + const ModuleList &images = target.GetImages(); + + images.FindSymbolsWithNameAndType(sym_name, eSymbolTypeCode, target_symbols); + size_t num_targets = target_symbols.GetSize(); + if (!num_targets) + return thread_plan_sp; + + typedef std::vector<lldb::addr_t> AddressVector; + AddressVector addrs; + for (size_t i = 0; i < num_targets; ++i) + { + SymbolContext context; + AddressRange range; + if (target_symbols.GetContextAtIndex(i, context)) + { + context.GetAddressRange(eSymbolContextEverything, 0, false, range); + lldb::addr_t addr = range.GetBaseAddress().GetLoadAddress(&target); + if (addr != LLDB_INVALID_ADDRESS) + addrs.push_back(addr); + } + } + + if (addrs.size() > 0) + { + AddressVector::iterator start = addrs.begin(); + AddressVector::iterator end = addrs.end(); + + std::sort(start, end); + addrs.erase(std::unique(start, end), end); + thread_plan_sp.reset(new ThreadPlanRunToAddress(thread, addrs, stop)); + } + + return thread_plan_sp; +} + +void +DynamicLoaderPOSIXDYLD::LoadAllCurrentModules() +{ + DYLDRendezvous::iterator I; + DYLDRendezvous::iterator E; + ModuleList module_list; + + if (!m_rendezvous.Resolve()) + return; + + for (I = m_rendezvous.begin(), E = m_rendezvous.end(); I != E; ++I) + { + FileSpec file(I->path.c_str(), false); + ModuleSP module_sp = LoadModuleAtAddress(file, I->base_addr); + if (module_sp.get()) + module_list.Append(module_sp); + } + + m_process->GetTarget().ModulesDidLoad(module_list); +} + +ModuleSP +DynamicLoaderPOSIXDYLD::LoadModuleAtAddress(const FileSpec &file, addr_t base_addr) +{ + Target &target = m_process->GetTarget(); + ModuleList &modules = target.GetImages(); + ModuleSP module_sp; + + ModuleSpec module_spec (file, target.GetArchitecture()); + if ((module_sp = modules.FindFirstModule (module_spec))) + { + UpdateLoadedSections(module_sp, base_addr); + } + else if ((module_sp = target.GetSharedModule(module_spec))) + { + UpdateLoadedSections(module_sp, base_addr); + } + + return module_sp; +} + +addr_t +DynamicLoaderPOSIXDYLD::ComputeLoadOffset() +{ + addr_t virt_entry; + + if (m_load_offset != LLDB_INVALID_ADDRESS) + return m_load_offset; + + if ((virt_entry = GetEntryPoint()) == LLDB_INVALID_ADDRESS) + return LLDB_INVALID_ADDRESS; + + ModuleSP module = m_process->GetTarget().GetExecutableModule(); + if (!module) + return LLDB_INVALID_ADDRESS; + + ObjectFile *exe = module->GetObjectFile(); + Address file_entry = exe->GetEntryPointAddress(); + + if (!file_entry.IsValid()) + return LLDB_INVALID_ADDRESS; + + m_load_offset = virt_entry - file_entry.GetFileAddress(); + return m_load_offset; +} + +addr_t +DynamicLoaderPOSIXDYLD::GetEntryPoint() +{ + if (m_entry_point != LLDB_INVALID_ADDRESS) + return m_entry_point; + + if (m_auxv.get() == NULL) + return LLDB_INVALID_ADDRESS; + + AuxVector::iterator I = m_auxv->FindEntry(AuxVector::AT_ENTRY); + + if (I == m_auxv->end()) + return LLDB_INVALID_ADDRESS; + + m_entry_point = static_cast<addr_t>(I->value); + return m_entry_point; +} diff --git a/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.h b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.h new file mode 100644 index 0000000..0476e45 --- /dev/null +++ b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.h @@ -0,0 +1,170 @@ +//===-- DynamicLoaderPOSIX.h ------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_DynamicLoaderPOSIX_H_ +#define liblldb_DynamicLoaderPOSIX_H_ + +// C Includes +// C++ Includes +// Other libraries and framework includes +#include "lldb/Breakpoint/StoppointCallbackContext.h" +#include "lldb/Target/DynamicLoader.h" + +#include "DYLDRendezvous.h" + +class AuxVector; + +class DynamicLoaderPOSIXDYLD : public lldb_private::DynamicLoader +{ +public: + + static void + Initialize(); + + static void + Terminate(); + + static lldb_private::ConstString + GetPluginNameStatic(); + + static const char * + GetPluginDescriptionStatic(); + + static lldb_private::DynamicLoader * + CreateInstance(lldb_private::Process *process, bool force); + + DynamicLoaderPOSIXDYLD(lldb_private::Process *process); + + virtual + ~DynamicLoaderPOSIXDYLD(); + + //------------------------------------------------------------------ + // DynamicLoader protocol + //------------------------------------------------------------------ + + virtual void + DidAttach(); + + virtual void + DidLaunch(); + + virtual lldb::ThreadPlanSP + GetStepThroughTrampolinePlan(lldb_private::Thread &thread, + bool stop_others); + + virtual lldb_private::Error + CanLoadImage(); + + //------------------------------------------------------------------ + // PluginInterface protocol + //------------------------------------------------------------------ + virtual lldb_private::ConstString + GetPluginName(); + + virtual uint32_t + GetPluginVersion(); + + virtual void + GetPluginCommandHelp(const char *command, lldb_private::Stream *strm); + + virtual lldb_private::Error + ExecutePluginCommand(lldb_private::Args &command, lldb_private::Stream *strm); + + virtual lldb_private::Log * + EnablePluginLogging(lldb_private::Stream *strm, lldb_private::Args &command); + +protected: + /// Runtime linker rendezvous structure. + DYLDRendezvous m_rendezvous; + + /// Virtual load address of the inferior process. + lldb::addr_t m_load_offset; + + /// Virtual entry address of the inferior process. + lldb::addr_t m_entry_point; + + /// Auxiliary vector of the inferior process. + std::unique_ptr<AuxVector> m_auxv; + + /// Rendezvous breakpoint. + lldb::break_id_t m_dyld_bid; + + /// Enables a breakpoint on a function called by the runtime + /// linker each time a module is loaded or unloaded. + void + SetRendezvousBreakpoint(); + + /// Callback routine which updates the current list of loaded modules based + /// on the information supplied by the runtime linker. + static bool + RendezvousBreakpointHit(void *baton, + lldb_private::StoppointCallbackContext *context, + lldb::user_id_t break_id, + lldb::user_id_t break_loc_id); + + /// Helper method for RendezvousBreakpointHit. Updates LLDB's current set + /// of loaded modules. + void + RefreshModules(); + + /// Updates the load address of every allocatable section in @p module. + /// + /// @param module The module to traverse. + /// + /// @param base_addr The virtual base address @p module is loaded at. + void + UpdateLoadedSections(lldb::ModuleSP module, + lldb::addr_t base_addr = 0); + + /// Locates or creates a module given by @p file and updates/loads the + /// resulting module at the virtual base address @p base_addr. + lldb::ModuleSP + LoadModuleAtAddress(const lldb_private::FileSpec &file, lldb::addr_t base_addr); + + /// Resolves the entry point for the current inferior process and sets a + /// breakpoint at that address. + void + ProbeEntry(); + + /// Callback routine invoked when we hit the breakpoint on process entry. + /// + /// This routine is responsible for resolving the load addresses of all + /// dependent modules required by the inferior and setting up the rendezvous + /// breakpoint. + static bool + EntryBreakpointHit(void *baton, + lldb_private::StoppointCallbackContext *context, + lldb::user_id_t break_id, + lldb::user_id_t break_loc_id); + + /// Helper for the entry breakpoint callback. Resolves the load addresses + /// of all dependent modules. + void + LoadAllCurrentModules(); + + /// Computes a value for m_load_offset returning the computed address on + /// success and LLDB_INVALID_ADDRESS on failure. + lldb::addr_t + ComputeLoadOffset(); + + /// Computes a value for m_entry_point returning the computed address on + /// success and LLDB_INVALID_ADDRESS on failure. + lldb::addr_t + GetEntryPoint(); + + /// Checks to see if the target module has changed, updates the target + /// accordingly and returns the target executable module. + lldb::ModuleSP + GetTargetExecutable(); + +private: + DISALLOW_COPY_AND_ASSIGN(DynamicLoaderPOSIXDYLD); +}; + +#endif // liblldb_DynamicLoaderPOSIXDYLD_H_ diff --git a/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/Static/DynamicLoaderStatic.cpp b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/Static/DynamicLoaderStatic.cpp new file mode 100644 index 0000000..274ba32 --- /dev/null +++ b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/Static/DynamicLoaderStatic.cpp @@ -0,0 +1,209 @@ +//===-- DynamicLoaderStatic.cpp ---------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "lldb/Core/Module.h" +#include "lldb/Core/PluginManager.h" +#include "lldb/Core/Section.h" +#include "lldb/Symbol/ObjectFile.h" +#include "lldb/Target/Target.h" + +#include "DynamicLoaderStatic.h" + +using namespace lldb; +using namespace lldb_private; + +//---------------------------------------------------------------------- +// Create an instance of this class. This function is filled into +// the plugin info class that gets handed out by the plugin factory and +// allows the lldb to instantiate an instance of this class. +//---------------------------------------------------------------------- +DynamicLoader * +DynamicLoaderStatic::CreateInstance (Process* process, bool force) +{ + bool create = force; + if (!create) + { + const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple(); + const llvm::Triple::OSType os_type = triple_ref.getOS(); + if ((os_type == llvm::Triple::UnknownOS)) + create = true; + } + + if (!create) + { + Module *exe_module = process->GetTarget().GetExecutableModulePointer(); + if (exe_module) + { + ObjectFile *object_file = exe_module->GetObjectFile(); + if (object_file) + { + create = (object_file->GetStrata() == ObjectFile::eStrataRawImage); + } + } + } + + if (create) + return new DynamicLoaderStatic (process); + return NULL; +} + +//---------------------------------------------------------------------- +// Constructor +//---------------------------------------------------------------------- +DynamicLoaderStatic::DynamicLoaderStatic (Process* process) : + DynamicLoader(process) +{ +} + +//---------------------------------------------------------------------- +// Destructor +//---------------------------------------------------------------------- +DynamicLoaderStatic::~DynamicLoaderStatic() +{ +} + +//------------------------------------------------------------------ +/// Called after attaching a process. +/// +/// Allow DynamicLoader plug-ins to execute some code after +/// attaching to a process. +//------------------------------------------------------------------ +void +DynamicLoaderStatic::DidAttach () +{ + LoadAllImagesAtFileAddresses(); +} + +//------------------------------------------------------------------ +/// Called after attaching a process. +/// +/// Allow DynamicLoader plug-ins to execute some code after +/// attaching to a process. +//------------------------------------------------------------------ +void +DynamicLoaderStatic::DidLaunch () +{ + LoadAllImagesAtFileAddresses(); +} + +void +DynamicLoaderStatic::LoadAllImagesAtFileAddresses () +{ + const ModuleList &module_list = m_process->GetTarget().GetImages(); + + ModuleList loaded_module_list; + + // Disable JIT for static dynamic loader targets + m_process->SetCanJIT(false); + + Mutex::Locker mutex_locker(module_list.GetMutex()); + + const size_t num_modules = module_list.GetSize(); + for (uint32_t idx = 0; idx < num_modules; ++idx) + { + ModuleSP module_sp (module_list.GetModuleAtIndexUnlocked (idx)); + if (module_sp) + { + bool changed = false; + ObjectFile *image_object_file = module_sp->GetObjectFile(); + if (image_object_file) + { + SectionList *section_list = image_object_file->GetSectionList (); + if (section_list) + { + // All sections listed in the dyld image info structure will all + // either be fixed up already, or they will all be off by a single + // slide amount that is determined by finding the first segment + // that is at file offset zero which also has bytes (a file size + // that is greater than zero) in the object file. + + // Determine the slide amount (if any) + const size_t num_sections = section_list->GetSize(); + size_t sect_idx = 0; + for (sect_idx = 0; sect_idx < num_sections; ++sect_idx) + { + // Iterate through the object file sections to find the + // first section that starts of file offset zero and that + // has bytes in the file... + SectionSP section_sp (section_list->GetSectionAtIndex (sect_idx)); + if (section_sp) + { + if (m_process->GetTarget().GetSectionLoadList().SetSectionLoadAddress (section_sp, section_sp->GetFileAddress())) + changed = true; + } + } + } + } + + if (changed) + loaded_module_list.AppendIfNeeded (module_sp); + } + } + + m_process->GetTarget().ModulesDidLoad (loaded_module_list); +} + +ThreadPlanSP +DynamicLoaderStatic::GetStepThroughTrampolinePlan (Thread &thread, bool stop_others) +{ + return ThreadPlanSP(); +} + +Error +DynamicLoaderStatic::CanLoadImage () +{ + Error error; + error.SetErrorString ("can't load images on with a static debug session"); + return error; +} + +void +DynamicLoaderStatic::Initialize() +{ + PluginManager::RegisterPlugin (GetPluginNameStatic(), + GetPluginDescriptionStatic(), + CreateInstance); +} + +void +DynamicLoaderStatic::Terminate() +{ + PluginManager::UnregisterPlugin (CreateInstance); +} + + +lldb_private::ConstString +DynamicLoaderStatic::GetPluginNameStatic() +{ + static ConstString g_name("static"); + return g_name; +} + +const char * +DynamicLoaderStatic::GetPluginDescriptionStatic() +{ + return "Dynamic loader plug-in that will load any images at the static addresses contained in each image."; +} + + +//------------------------------------------------------------------ +// PluginInterface protocol +//------------------------------------------------------------------ +lldb_private::ConstString +DynamicLoaderStatic::GetPluginName() +{ + return GetPluginNameStatic(); +} + +uint32_t +DynamicLoaderStatic::GetPluginVersion() +{ + return 1; +} + diff --git a/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/Static/DynamicLoaderStatic.h b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/Static/DynamicLoaderStatic.h new file mode 100644 index 0000000..a99435f --- /dev/null +++ b/contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/Static/DynamicLoaderStatic.h @@ -0,0 +1,88 @@ +//===-- DynamicLoaderStatic.h -----------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_DynamicLoaderStatic_h_ +#define liblldb_DynamicLoaderStatic_h_ + +// C Includes +// C++ Includes +#include <map> +#include <vector> +#include <string> + +// Other libraries and framework includes +#include "llvm/Support/MachO.h" + +#include "lldb/Target/DynamicLoader.h" +#include "lldb/Host/FileSpec.h" +#include "lldb/Core/UUID.h" +#include "lldb/Host/Mutex.h" +#include "lldb/Target/Process.h" + +class DynamicLoaderStatic : public lldb_private::DynamicLoader +{ +public: + //------------------------------------------------------------------ + // Static Functions + //------------------------------------------------------------------ + static void + Initialize(); + + static void + Terminate(); + + static lldb_private::ConstString + GetPluginNameStatic(); + + static const char * + GetPluginDescriptionStatic(); + + static lldb_private::DynamicLoader * + CreateInstance (lldb_private::Process *process, bool force); + + DynamicLoaderStatic (lldb_private::Process *process); + + virtual + ~DynamicLoaderStatic (); + //------------------------------------------------------------------ + /// Called after attaching a process. + /// + /// Allow DynamicLoader plug-ins to execute some code after + /// attaching to a process. + //------------------------------------------------------------------ + virtual void + DidAttach (); + + virtual void + DidLaunch (); + + virtual lldb::ThreadPlanSP + GetStepThroughTrampolinePlan (lldb_private::Thread &thread, + bool stop_others); + + virtual lldb_private::Error + CanLoadImage (); + + //------------------------------------------------------------------ + // PluginInterface protocol + //------------------------------------------------------------------ + virtual lldb_private::ConstString + GetPluginName(); + + virtual uint32_t + GetPluginVersion(); + +private: + void + LoadAllImagesAtFileAddresses (); + + DISALLOW_COPY_AND_ASSIGN (DynamicLoaderStatic); +}; + +#endif // liblldb_DynamicLoaderStatic_h_ |
