a174349960
Simplify the locking strategy for Module and its owned objects to always use the Module's mutex to avoid A/B deadlocks. We had a case where a symbol vendor was locking itself and then calling a function that would try to get it's Module's mutex and at the same time another thread had the Module mutex that was trying to get the SymbolVendor mutex. Now any classes that inherit from ModuleChild should use the module lock using code like:
void
ModuleChildSubclass::Function
{
ModuleSP module_sp(GetModule());
if (module_sp)
{
lldb_private::Mutex::Locker locker(module_sp->GetMutex());
... do work here...
}
}
This will help avoid deadlocks by using as few locks as possible for a module and all its child objects and also enforce detecting if a module has gone away (the ModuleSP will be returned empty if the weak_ptr does refer to a valid object anymore).
llvm-svn: 152679
239 lines
7.0 KiB
C++
239 lines
7.0 KiB
C++
//===-- ObjectFilePECOFF.h --------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef liblldb_ObjectFilePECOFF_h_
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#define liblldb_ObjectFilePECOFF_h_
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#include <vector>
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#include "lldb/Symbol/ObjectFile.h"
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class ObjectFilePECOFF :
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public lldb_private::ObjectFile
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{
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public:
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//------------------------------------------------------------------
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// Static Functions
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//------------------------------------------------------------------
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static void
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Initialize();
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static void
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Terminate();
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static const char *
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GetPluginNameStatic();
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static const char *
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GetPluginDescriptionStatic();
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static ObjectFile *
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CreateInstance (const lldb::ModuleSP &module_sp,
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lldb::DataBufferSP& dataSP,
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const lldb_private::FileSpec* file,
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lldb::addr_t offset,
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lldb::addr_t length);
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static lldb_private::ObjectFile *
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CreateMemoryInstance (const lldb::ModuleSP &module_sp,
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lldb::DataBufferSP& data_sp,
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const lldb::ProcessSP &process_sp,
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lldb::addr_t header_addr);
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static bool
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MagicBytesMatch (lldb::DataBufferSP& dataSP);
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ObjectFilePECOFF (const lldb::ModuleSP &module_sp,
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lldb::DataBufferSP& dataSP,
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const lldb_private::FileSpec* file,
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lldb::addr_t offset,
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lldb::addr_t length);
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virtual
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~ObjectFilePECOFF();
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virtual bool
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ParseHeader ();
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virtual lldb::ByteOrder
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GetByteOrder () const;
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virtual bool
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IsExecutable () const;
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virtual size_t
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GetAddressByteSize () const;
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// virtual lldb_private::AddressClass
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// GetAddressClass (lldb::addr_t file_addr);
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//
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virtual lldb_private::Symtab *
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GetSymtab();
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virtual lldb_private::SectionList *
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GetSectionList();
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virtual void
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Dump (lldb_private::Stream *s);
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virtual bool
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GetArchitecture (lldb_private::ArchSpec &arch);
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virtual bool
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GetUUID (lldb_private::UUID* uuid);
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virtual uint32_t
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GetDependentModules (lldb_private::FileSpecList& files);
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//------------------------------------------------------------------
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// PluginInterface protocol
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//------------------------------------------------------------------
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virtual const char *
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GetPluginName();
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virtual const char *
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GetShortPluginName();
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virtual uint32_t
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GetPluginVersion();
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//
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// virtual lldb_private::Address
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// GetEntryPointAddress ();
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virtual ObjectFile::Type
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CalculateType();
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virtual ObjectFile::Strata
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CalculateStrata();
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protected:
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bool NeedsEndianSwap() const;
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typedef struct dos_header { // DOS .EXE header
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uint16_t e_magic; // Magic number
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uint16_t e_cblp; // Bytes on last page of file
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uint16_t e_cp; // Pages in file
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uint16_t e_crlc; // Relocations
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uint16_t e_cparhdr; // Size of header in paragraphs
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uint16_t e_minalloc; // Minimum extra paragraphs needed
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uint16_t e_maxalloc; // Maximum extra paragraphs needed
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uint16_t e_ss; // Initial (relative) SS value
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uint16_t e_sp; // Initial SP value
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uint16_t e_csum; // Checksum
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uint16_t e_ip; // Initial IP value
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uint16_t e_cs; // Initial (relative) CS value
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uint16_t e_lfarlc; // File address of relocation table
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uint16_t e_ovno; // Overlay number
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uint16_t e_res[4]; // Reserved words
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uint16_t e_oemid; // OEM identifier (for e_oeminfo)
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uint16_t e_oeminfo; // OEM information; e_oemid specific
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uint16_t e_res2[10]; // Reserved words
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uint32_t e_lfanew; // File address of new exe header
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} dos_header_t;
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typedef struct coff_header {
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uint16_t machine;
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uint16_t nsects;
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uint32_t modtime;
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uint32_t symoff;
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uint32_t nsyms;
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uint16_t hdrsize;
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uint16_t flags;
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} coff_header_t;
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typedef struct data_directory {
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uint32_t vmaddr;
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uint32_t vmsize;
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} data_directory_t;
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typedef struct coff_opt_header
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{
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uint16_t magic;
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uint8_t major_linker_version;
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uint8_t minor_linker_version;
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uint32_t code_size;
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uint32_t data_size;
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uint32_t bss_size;
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uint32_t entry;
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uint32_t code_offset;
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uint32_t data_offset;
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uint64_t image_base;
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uint32_t sect_alignment;
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uint32_t file_alignment;
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uint16_t major_os_system_version;
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uint16_t minor_os_system_version;
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uint16_t major_image_version;
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uint16_t minor_image_version;
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uint16_t major_subsystem_version;
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uint16_t minor_subsystem_version;
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uint32_t reserved1;
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uint32_t image_size;
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uint32_t header_size;
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uint32_t checksum;
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uint16_t subsystem;
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uint16_t dll_flags;
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uint64_t stack_reserve_size;
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uint64_t stack_commit_size;
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uint64_t heap_reserve_size;
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uint64_t heap_commit_size;
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uint32_t loader_flags;
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// uint32_t num_data_dir_entries;
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std::vector<data_directory> data_dirs; // will contain num_data_dir_entries entries
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} coff_opt_header_t;
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typedef struct section_header {
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char name[8];
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uint32_t vmsize; // Virtual Size
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uint32_t vmaddr; // Virtual Addr
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uint32_t size; // File size
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uint32_t offset; // File offset
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uint32_t reloff; // Offset to relocations
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uint32_t lineoff;// Offset to line table entries
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uint16_t nreloc; // Number of relocation entries
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uint16_t nline; // Number of line table entries
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uint32_t flags;
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} section_header_t;
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typedef struct coff_symbol {
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char name[8];
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uint32_t value;
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uint16_t sect;
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uint16_t type;
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uint8_t storage;
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uint8_t naux;
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} coff_symbol_t;
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bool ParseDOSHeader ();
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bool ParseCOFFHeader (uint32_t* offset_ptr);
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bool ParseCOFFOptionalHeader (uint32_t* offset_ptr);
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bool ParseSectionHeaders (uint32_t offset);
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static void DumpDOSHeader(lldb_private::Stream *s, const dos_header_t& header);
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static void DumpCOFFHeader(lldb_private::Stream *s, const coff_header_t& header);
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static void DumpOptCOFFHeader(lldb_private::Stream *s, const coff_opt_header_t& header);
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void DumpSectionHeaders(lldb_private::Stream *s);
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void DumpSectionHeader(lldb_private::Stream *s, const section_header_t& sh);
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bool GetSectionName(std::string& sect_name, const section_header_t& sect);
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typedef std::vector<section_header_t> SectionHeaderColl;
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typedef SectionHeaderColl::iterator SectionHeaderCollIter;
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typedef SectionHeaderColl::const_iterator SectionHeaderCollConstIter;
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private:
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mutable std::auto_ptr<lldb_private::SectionList> m_sections_ap;
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mutable std::auto_ptr<lldb_private::Symtab> m_symtab_ap;
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dos_header_t m_dos_header;
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coff_header_t m_coff_header;
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coff_opt_header_t m_coff_header_opt;
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SectionHeaderColl m_sect_headers;
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};
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#endif // #ifndef liblldb_ObjectFilePECOFF_h_
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