llvm-project/lldb/source/Target/SectionLoadList.cpp

259 lines
9.0 KiB
C++
Raw Normal View History

//===-- SectionLoadList.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/Target/SectionLoadList.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Log.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/Section.h"
#include "lldb/Core/Stream.h"
#include "lldb/Symbol/Block.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Symbol/SymbolContext.h"
using namespace lldb;
using namespace lldb_private;
bool
SectionLoadList::IsEmpty() const
{
Mutex::Locker locker(m_mutex);
return m_addr_to_sect.empty();
}
void
SectionLoadList::Clear ()
{
Mutex::Locker locker(m_mutex);
m_addr_to_sect.clear();
m_sect_to_addr.clear();
}
addr_t
SectionLoadList::GetSectionLoadAddress (const lldb::SectionSP &section) const
{
// TODO: add support for the same section having multiple load addresses
addr_t section_load_addr = LLDB_INVALID_ADDRESS;
if (section)
{
Mutex::Locker locker(m_mutex);
sect_to_addr_collection::const_iterator pos = m_sect_to_addr.find (section.get());
if (pos != m_sect_to_addr.end())
section_load_addr = pos->second;
}
return section_load_addr;
}
bool
SectionLoadList::SetSectionLoadAddress (const lldb::SectionSP &section, addr_t load_addr, bool warn_multiple)
{
LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER | LIBLLDB_LOG_VERBOSE));
if (log)
Modified LLDB expressions to not have to JIT and run code just to see variable values or persistent expression variables. Now if an expression consists of a value that is a child of a variable, or of a persistent variable only, we will create a value object for it and make a ValueObjectConstResult from it to freeze the value (for program variables only, not persistent variables) and avoid running JITed code. For everything else we still parse up and JIT code and run it in the inferior. There was also a lot of clean up in the expression code. I made the ClangExpressionVariables be stored in collections of shared pointers instead of in collections of objects. This will help stop a lot of copy constructors on these large objects and also cleans up the code considerably. The persistent clang expression variables were moved over to the Target to ensure they persist across process executions. Added the ability for lldb_private::Target objects to evaluate expressions. We want to evaluate expressions at the target level in case we aren't running yet, or we have just completed running. We still want to be able to access the persistent expression variables between runs, and also evaluate constant expressions. Added extra logging to the dynamic loader plug-in for MacOSX. ModuleList objects can now dump their contents with the UUID, arch and full paths being logged with appropriate prefix values. Thread hardened the Communication class a bit by making the connection auto_ptr member into a shared pointer member and then making a local copy of the shared pointer in each method that uses it to make sure another thread can't nuke the connection object while it is being used by another thread. Added a new file to the lldb/test/load_unload test that causes the test a.out file to link to the libd.dylib file all the time. This will allow us to test using the DYLD_LIBRARY_PATH environment variable after moving libd.dylib somewhere else. llvm-svn: 121745
2010-12-14 10:59:59 +08:00
{
const FileSpec &module_file_spec (section->GetModule()->GetFileSpec());
log->Printf ("SectionLoadList::%s (section = %p (%s%s%s.%s), load_addr = 0x%16.16llx)",
__FUNCTION__,
section.get(),
Modified LLDB expressions to not have to JIT and run code just to see variable values or persistent expression variables. Now if an expression consists of a value that is a child of a variable, or of a persistent variable only, we will create a value object for it and make a ValueObjectConstResult from it to freeze the value (for program variables only, not persistent variables) and avoid running JITed code. For everything else we still parse up and JIT code and run it in the inferior. There was also a lot of clean up in the expression code. I made the ClangExpressionVariables be stored in collections of shared pointers instead of in collections of objects. This will help stop a lot of copy constructors on these large objects and also cleans up the code considerably. The persistent clang expression variables were moved over to the Target to ensure they persist across process executions. Added the ability for lldb_private::Target objects to evaluate expressions. We want to evaluate expressions at the target level in case we aren't running yet, or we have just completed running. We still want to be able to access the persistent expression variables between runs, and also evaluate constant expressions. Added extra logging to the dynamic loader plug-in for MacOSX. ModuleList objects can now dump their contents with the UUID, arch and full paths being logged with appropriate prefix values. Thread hardened the Communication class a bit by making the connection auto_ptr member into a shared pointer member and then making a local copy of the shared pointer in each method that uses it to make sure another thread can't nuke the connection object while it is being used by another thread. Added a new file to the lldb/test/load_unload test that causes the test a.out file to link to the libd.dylib file all the time. This will allow us to test using the DYLD_LIBRARY_PATH environment variable after moving libd.dylib somewhere else. llvm-svn: 121745
2010-12-14 10:59:59 +08:00
module_file_spec.GetDirectory().AsCString(),
module_file_spec.GetDirectory() ? "/" : "",
module_file_spec.GetFilename().AsCString(),
section->GetName().AsCString(),
load_addr);
Modified LLDB expressions to not have to JIT and run code just to see variable values or persistent expression variables. Now if an expression consists of a value that is a child of a variable, or of a persistent variable only, we will create a value object for it and make a ValueObjectConstResult from it to freeze the value (for program variables only, not persistent variables) and avoid running JITed code. For everything else we still parse up and JIT code and run it in the inferior. There was also a lot of clean up in the expression code. I made the ClangExpressionVariables be stored in collections of shared pointers instead of in collections of objects. This will help stop a lot of copy constructors on these large objects and also cleans up the code considerably. The persistent clang expression variables were moved over to the Target to ensure they persist across process executions. Added the ability for lldb_private::Target objects to evaluate expressions. We want to evaluate expressions at the target level in case we aren't running yet, or we have just completed running. We still want to be able to access the persistent expression variables between runs, and also evaluate constant expressions. Added extra logging to the dynamic loader plug-in for MacOSX. ModuleList objects can now dump their contents with the UUID, arch and full paths being logged with appropriate prefix values. Thread hardened the Communication class a bit by making the connection auto_ptr member into a shared pointer member and then making a local copy of the shared pointer in each method that uses it to make sure another thread can't nuke the connection object while it is being used by another thread. Added a new file to the lldb/test/load_unload test that causes the test a.out file to link to the libd.dylib file all the time. This will allow us to test using the DYLD_LIBRARY_PATH environment variable after moving libd.dylib somewhere else. llvm-svn: 121745
2010-12-14 10:59:59 +08:00
}
if (section->GetByteSize() == 0)
return false; // No change
// Fill in the section -> load_addr map
Mutex::Locker locker(m_mutex);
sect_to_addr_collection::iterator sta_pos = m_sect_to_addr.find(section.get());
if (sta_pos != m_sect_to_addr.end())
{
if (load_addr == sta_pos->second)
return false; // No change...
else
sta_pos->second = load_addr;
}
else
m_sect_to_addr[section.get()] = load_addr;
// Fill in the load_addr -> section map
addr_to_sect_collection::iterator ats_pos = m_addr_to_sect.find(load_addr);
if (ats_pos != m_addr_to_sect.end())
{
// Some sections are ok to overlap, and for others we should warn. When
// we have multiple load addresses that correspond to a section, we will
// allways attribute the section to the be last section that claims it
// exists at that address. Sometimes it is ok for more that one section
// to be loaded at a specific load address, and other times it isn't.
// The "warn_multiple" parameter tells us if we should warn in this case
// or not. The DynamicLoader plug-in subclasses should know which
// sections should warn and which shouldn't (darwin shared cache modules
// all shared the same "__LINKEDIT" sections, so the dynamic loader can
// pass false for "warn_multiple").
if (warn_multiple && section != ats_pos->second)
{
ModuleSP module_sp (section->GetModule());
if (module_sp)
{
module_sp->ReportWarning ("address 0x%16.16llx maps to more than one section: %s.%s and %s.%s",
load_addr,
module_sp->GetFileSpec().GetFilename().GetCString(),
section->GetName().GetCString(),
ats_pos->second->GetModule()->GetFileSpec().GetFilename().GetCString(),
ats_pos->second->GetName().GetCString());
}
}
ats_pos->second = section;
}
else
m_addr_to_sect[load_addr] = section;
return true; // Changed
}
size_t
SectionLoadList::SetSectionUnloaded (const lldb::SectionSP &section_sp)
{
size_t unload_count = 0;
if (section_sp)
Modified LLDB expressions to not have to JIT and run code just to see variable values or persistent expression variables. Now if an expression consists of a value that is a child of a variable, or of a persistent variable only, we will create a value object for it and make a ValueObjectConstResult from it to freeze the value (for program variables only, not persistent variables) and avoid running JITed code. For everything else we still parse up and JIT code and run it in the inferior. There was also a lot of clean up in the expression code. I made the ClangExpressionVariables be stored in collections of shared pointers instead of in collections of objects. This will help stop a lot of copy constructors on these large objects and also cleans up the code considerably. The persistent clang expression variables were moved over to the Target to ensure they persist across process executions. Added the ability for lldb_private::Target objects to evaluate expressions. We want to evaluate expressions at the target level in case we aren't running yet, or we have just completed running. We still want to be able to access the persistent expression variables between runs, and also evaluate constant expressions. Added extra logging to the dynamic loader plug-in for MacOSX. ModuleList objects can now dump their contents with the UUID, arch and full paths being logged with appropriate prefix values. Thread hardened the Communication class a bit by making the connection auto_ptr member into a shared pointer member and then making a local copy of the shared pointer in each method that uses it to make sure another thread can't nuke the connection object while it is being used by another thread. Added a new file to the lldb/test/load_unload test that causes the test a.out file to link to the libd.dylib file all the time. This will allow us to test using the DYLD_LIBRARY_PATH environment variable after moving libd.dylib somewhere else. llvm-svn: 121745
2010-12-14 10:59:59 +08:00
{
LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER | LIBLLDB_LOG_VERBOSE));
if (log)
{
const FileSpec &module_file_spec (section_sp->GetModule()->GetFileSpec());
log->Printf ("SectionLoadList::%s (section = %p (%s%s%s.%s))",
__FUNCTION__,
section_sp.get(),
module_file_spec.GetDirectory().AsCString(),
module_file_spec.GetDirectory() ? "/" : "",
module_file_spec.GetFilename().AsCString(),
section_sp->GetName().AsCString());
}
Mutex::Locker locker(m_mutex);
sect_to_addr_collection::iterator sta_pos = m_sect_to_addr.find(section_sp.get());
if (sta_pos != m_sect_to_addr.end())
{
addr_t load_addr = sta_pos->second;
m_sect_to_addr.erase (sta_pos);
addr_to_sect_collection::iterator ats_pos = m_addr_to_sect.find(load_addr);
if (ats_pos != m_addr_to_sect.end())
m_addr_to_sect.erase (ats_pos);
}
}
return unload_count;
}
bool
SectionLoadList::SetSectionUnloaded (const lldb::SectionSP &section_sp, addr_t load_addr)
{
LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER | LIBLLDB_LOG_VERBOSE));
if (log)
Modified LLDB expressions to not have to JIT and run code just to see variable values or persistent expression variables. Now if an expression consists of a value that is a child of a variable, or of a persistent variable only, we will create a value object for it and make a ValueObjectConstResult from it to freeze the value (for program variables only, not persistent variables) and avoid running JITed code. For everything else we still parse up and JIT code and run it in the inferior. There was also a lot of clean up in the expression code. I made the ClangExpressionVariables be stored in collections of shared pointers instead of in collections of objects. This will help stop a lot of copy constructors on these large objects and also cleans up the code considerably. The persistent clang expression variables were moved over to the Target to ensure they persist across process executions. Added the ability for lldb_private::Target objects to evaluate expressions. We want to evaluate expressions at the target level in case we aren't running yet, or we have just completed running. We still want to be able to access the persistent expression variables between runs, and also evaluate constant expressions. Added extra logging to the dynamic loader plug-in for MacOSX. ModuleList objects can now dump their contents with the UUID, arch and full paths being logged with appropriate prefix values. Thread hardened the Communication class a bit by making the connection auto_ptr member into a shared pointer member and then making a local copy of the shared pointer in each method that uses it to make sure another thread can't nuke the connection object while it is being used by another thread. Added a new file to the lldb/test/load_unload test that causes the test a.out file to link to the libd.dylib file all the time. This will allow us to test using the DYLD_LIBRARY_PATH environment variable after moving libd.dylib somewhere else. llvm-svn: 121745
2010-12-14 10:59:59 +08:00
{
const FileSpec &module_file_spec (section_sp->GetModule()->GetFileSpec());
Modified LLDB expressions to not have to JIT and run code just to see variable values or persistent expression variables. Now if an expression consists of a value that is a child of a variable, or of a persistent variable only, we will create a value object for it and make a ValueObjectConstResult from it to freeze the value (for program variables only, not persistent variables) and avoid running JITed code. For everything else we still parse up and JIT code and run it in the inferior. There was also a lot of clean up in the expression code. I made the ClangExpressionVariables be stored in collections of shared pointers instead of in collections of objects. This will help stop a lot of copy constructors on these large objects and also cleans up the code considerably. The persistent clang expression variables were moved over to the Target to ensure they persist across process executions. Added the ability for lldb_private::Target objects to evaluate expressions. We want to evaluate expressions at the target level in case we aren't running yet, or we have just completed running. We still want to be able to access the persistent expression variables between runs, and also evaluate constant expressions. Added extra logging to the dynamic loader plug-in for MacOSX. ModuleList objects can now dump their contents with the UUID, arch and full paths being logged with appropriate prefix values. Thread hardened the Communication class a bit by making the connection auto_ptr member into a shared pointer member and then making a local copy of the shared pointer in each method that uses it to make sure another thread can't nuke the connection object while it is being used by another thread. Added a new file to the lldb/test/load_unload test that causes the test a.out file to link to the libd.dylib file all the time. This will allow us to test using the DYLD_LIBRARY_PATH environment variable after moving libd.dylib somewhere else. llvm-svn: 121745
2010-12-14 10:59:59 +08:00
log->Printf ("SectionLoadList::%s (section = %p (%s%s%s.%s), load_addr = 0x%16.16llx)",
__FUNCTION__,
section_sp.get(),
Modified LLDB expressions to not have to JIT and run code just to see variable values or persistent expression variables. Now if an expression consists of a value that is a child of a variable, or of a persistent variable only, we will create a value object for it and make a ValueObjectConstResult from it to freeze the value (for program variables only, not persistent variables) and avoid running JITed code. For everything else we still parse up and JIT code and run it in the inferior. There was also a lot of clean up in the expression code. I made the ClangExpressionVariables be stored in collections of shared pointers instead of in collections of objects. This will help stop a lot of copy constructors on these large objects and also cleans up the code considerably. The persistent clang expression variables were moved over to the Target to ensure they persist across process executions. Added the ability for lldb_private::Target objects to evaluate expressions. We want to evaluate expressions at the target level in case we aren't running yet, or we have just completed running. We still want to be able to access the persistent expression variables between runs, and also evaluate constant expressions. Added extra logging to the dynamic loader plug-in for MacOSX. ModuleList objects can now dump their contents with the UUID, arch and full paths being logged with appropriate prefix values. Thread hardened the Communication class a bit by making the connection auto_ptr member into a shared pointer member and then making a local copy of the shared pointer in each method that uses it to make sure another thread can't nuke the connection object while it is being used by another thread. Added a new file to the lldb/test/load_unload test that causes the test a.out file to link to the libd.dylib file all the time. This will allow us to test using the DYLD_LIBRARY_PATH environment variable after moving libd.dylib somewhere else. llvm-svn: 121745
2010-12-14 10:59:59 +08:00
module_file_spec.GetDirectory().AsCString(),
module_file_spec.GetDirectory() ? "/" : "",
module_file_spec.GetFilename().AsCString(),
section_sp->GetName().AsCString(),
load_addr);
Modified LLDB expressions to not have to JIT and run code just to see variable values or persistent expression variables. Now if an expression consists of a value that is a child of a variable, or of a persistent variable only, we will create a value object for it and make a ValueObjectConstResult from it to freeze the value (for program variables only, not persistent variables) and avoid running JITed code. For everything else we still parse up and JIT code and run it in the inferior. There was also a lot of clean up in the expression code. I made the ClangExpressionVariables be stored in collections of shared pointers instead of in collections of objects. This will help stop a lot of copy constructors on these large objects and also cleans up the code considerably. The persistent clang expression variables were moved over to the Target to ensure they persist across process executions. Added the ability for lldb_private::Target objects to evaluate expressions. We want to evaluate expressions at the target level in case we aren't running yet, or we have just completed running. We still want to be able to access the persistent expression variables between runs, and also evaluate constant expressions. Added extra logging to the dynamic loader plug-in for MacOSX. ModuleList objects can now dump their contents with the UUID, arch and full paths being logged with appropriate prefix values. Thread hardened the Communication class a bit by making the connection auto_ptr member into a shared pointer member and then making a local copy of the shared pointer in each method that uses it to make sure another thread can't nuke the connection object while it is being used by another thread. Added a new file to the lldb/test/load_unload test that causes the test a.out file to link to the libd.dylib file all the time. This will allow us to test using the DYLD_LIBRARY_PATH environment variable after moving libd.dylib somewhere else. llvm-svn: 121745
2010-12-14 10:59:59 +08:00
}
bool erased = false;
Mutex::Locker locker(m_mutex);
sect_to_addr_collection::iterator sta_pos = m_sect_to_addr.find(section_sp.get());
if (sta_pos != m_sect_to_addr.end())
{
erased = true;
m_sect_to_addr.erase (sta_pos);
}
addr_to_sect_collection::iterator ats_pos = m_addr_to_sect.find(load_addr);
if (ats_pos != m_addr_to_sect.end())
{
erased = true;
m_addr_to_sect.erase (ats_pos);
}
return erased;
}
bool
SectionLoadList::ResolveLoadAddress (addr_t load_addr, Address &so_addr) const
{
// First find the top level section that this load address exists in
Mutex::Locker locker(m_mutex);
if (!m_addr_to_sect.empty())
{
addr_to_sect_collection::const_iterator pos = m_addr_to_sect.lower_bound (load_addr);
if (pos != m_addr_to_sect.end())
{
if (load_addr != pos->first && pos != m_addr_to_sect.begin())
--pos;
if (load_addr >= pos->first)
{
addr_t offset = load_addr - pos->first;
if (offset < pos->second->GetByteSize())
{
// We have found the top level section, now we need to find the
// deepest child section.
return pos->second->ResolveContainedAddress (offset, so_addr);
}
}
}
else
{
// There are no entries that have an address that is >= load_addr,
// so we need to check the last entry on our collection.
addr_to_sect_collection::const_reverse_iterator rpos = m_addr_to_sect.rbegin();
if (load_addr >= rpos->first)
{
addr_t offset = load_addr - rpos->first;
if (offset < rpos->second->GetByteSize())
{
// We have found the top level section, now we need to find the
// deepest child section.
return rpos->second->ResolveContainedAddress (offset, so_addr);
}
}
}
}
so_addr.Clear();
return false;
}
void
SectionLoadList::Dump (Stream &s, Target *target)
{
Mutex::Locker locker(m_mutex);
addr_to_sect_collection::const_iterator pos, end;
for (pos = m_addr_to_sect.begin(), end = m_addr_to_sect.end(); pos != end; ++pos)
{
s.Printf("addr = 0x%16.16llx, section = %p: ", pos->first, pos->second.get());
pos->second->Dump (&s, target, 0);
}
}