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cc427fadec4aac05751e30ce42df87d3a4a63037
llvm/lldb/source/Symbol/SymbolContext.cpp
Greg Clayton d16e1e596a Added the ability to _not_ skip the prologue when settings breakpoints 
by name by adding an extra parameter to the lldb_private::Target breakpoint 
setting functions.

Added a function in the DWARF symbol file plug-in that can dump errors
and prints out which DWARF file the error is happening in so we can track
down what used to be assertions easily.

Fixed the MacOSX kernel plug-in to properly read the kext images and set
the kext breakpoint to watch for kexts as they are loaded.

llvm-svn: 134990
2011-07-12 17:06:17 +00:00

908 lines
25 KiB
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//===-- SymbolContext.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/Symbol/SymbolContext.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/Module.h"
#include "lldb/Interpreter/Args.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Symbol/SymbolVendor.h"
#include "lldb/Target/Target.h"
using namespace lldb;
using namespace lldb_private;
SymbolContext::SymbolContext() :
target_sp (),
module_sp (),
comp_unit (NULL),
function (NULL),
block (NULL),
line_entry (),
symbol (NULL)
{
}
SymbolContext::SymbolContext(const ModuleSP& m, CompileUnit *cu, Function *f, Block *b, LineEntry *le, Symbol *s) :
target_sp (),
module_sp (m),
comp_unit (cu),
function (f),
block (b),
line_entry (),
symbol (s)
{
if (le)
line_entry = *le;
}
SymbolContext::SymbolContext(const TargetSP &t, const ModuleSP& m, CompileUnit *cu, Function *f, Block *b, LineEntry *le, Symbol *s) :
target_sp (t),
module_sp (m),
comp_unit (cu),
function (f),
block (b),
line_entry (),
symbol (s)
{
if (le)
line_entry = *le;
}
SymbolContext::SymbolContext(const SymbolContext& rhs) :
target_sp (rhs.target_sp),
module_sp (rhs.module_sp),
comp_unit (rhs.comp_unit),
function (rhs.function),
block (rhs.block),
line_entry (rhs.line_entry),
symbol (rhs.symbol)
{
}
SymbolContext::SymbolContext (SymbolContextScope *sc_scope) :
target_sp (),
module_sp (),
comp_unit (NULL),
function (NULL),
block (NULL),
line_entry (),
symbol (NULL)
{
sc_scope->CalculateSymbolContext (this);
}
const SymbolContext&
SymbolContext::operator= (const SymbolContext& rhs)
{
if (this != &rhs)
{
target_sp = rhs.target_sp;
module_sp = rhs.module_sp;
comp_unit = rhs.comp_unit;
function = rhs.function;
block = rhs.block;
line_entry = rhs.line_entry;
symbol = rhs.symbol;
}
return *this;
}
void
SymbolContext::Clear()
{
target_sp.reset();
module_sp.reset();
comp_unit = NULL;
function = NULL;
block = NULL;
line_entry.Clear();
symbol = NULL;
}
bool
SymbolContext::DumpStopContext
(
Stream *s,
ExecutionContextScope *exe_scope,
const Address &addr,
bool show_fullpaths,
bool show_module,
bool show_inlined_frames
) const
{
bool dumped_something = false;
if (show_module && module_sp)
{
if (show_fullpaths)
*s << module_sp->GetFileSpec();
else
*s << module_sp->GetFileSpec().GetFilename();
s->PutChar('`');
dumped_something = true;
}
if (function != NULL)
{
if (function->GetMangled().GetName())
{
dumped_something = true;
function->GetMangled().GetName().Dump(s);
}
if (addr.IsValid())
{
const addr_t function_offset = addr.GetOffset() - function->GetAddressRange().GetBaseAddress().GetOffset();
if (function_offset)
{
dumped_something = true;
s->Printf(" + %llu", function_offset);
}
}
if (block != NULL)
{
s->IndentMore();
block->DumpStopContext (s, this, NULL, show_fullpaths, show_inlined_frames);
s->IndentLess();
dumped_something = true;
}
else
{
if (line_entry.IsValid())
{
dumped_something = true;
s->PutCString(" at ");
if (line_entry.DumpStopContext(s, show_fullpaths))
dumped_something = true;
}
}
}
else if (symbol != NULL)
{
if (symbol->GetMangled().GetName())
{
dumped_something = true;
symbol->GetMangled().GetName().Dump(s);
}
if (addr.IsValid() && symbol->GetAddressRangePtr())
{
const addr_t symbol_offset = addr.GetOffset() - symbol->GetAddressRangePtr()->GetBaseAddress().GetOffset();
if (symbol_offset)
{
dumped_something = true;
s->Printf(" + %llu", symbol_offset);
}
}
}
else if (addr.IsValid())
{
addr.Dump(s, exe_scope, Address::DumpStyleModuleWithFileAddress);
dumped_something = true;
}
return dumped_something;
}
void
SymbolContext::GetDescription(Stream *s, lldb::DescriptionLevel level, Target *target) const
{
if (module_sp)
{
s->Indent(" Module: file = \"");
module_sp->GetFileSpec().Dump(s);
*s << '"';
if (module_sp->GetArchitecture().IsValid())
s->Printf (", arch = \"%s\"", module_sp->GetArchitecture().GetArchitectureName());
s->EOL();
}
if (comp_unit != NULL)
{
s->Indent("CompileUnit: ");
comp_unit->GetDescription (s, level);
s->EOL();
}
if (function != NULL)
{
s->Indent(" Function: ");
function->GetDescription (s, level, target);
s->EOL();
Type *func_type = function->GetType();
if (func_type)
{
s->Indent(" FuncType: ");
func_type->GetDescription (s, level, false);
s->EOL();
}
}
if (block != NULL)
{
std::vector<Block *> blocks;
blocks.push_back (block);
Block *parent_block = block->GetParent();
while (parent_block)
{
blocks.push_back (parent_block);
parent_block = parent_block->GetParent();
}
std::vector<Block *>::reverse_iterator pos;
std::vector<Block *>::reverse_iterator begin = blocks.rbegin();
std::vector<Block *>::reverse_iterator end = blocks.rend();
for (pos = begin; pos != end; ++pos)
{
if (pos == begin)
s->Indent(" Blocks: ");
else
s->Indent(" ");
(*pos)->GetDescription(s, function, level, target);
s->EOL();
}
}
if (line_entry.IsValid())
{
s->Indent(" LineEntry: ");
line_entry.GetDescription (s, level, comp_unit, target, false);
s->EOL();
}
if (symbol != NULL)
{
s->Indent(" Symbol: ");
symbol->GetDescription(s, level, target);
s->EOL();
}
}
uint32_t
SymbolContext::GetResolvedMask () const
{
uint32_t resolved_mask = 0;
if (target_sp) resolved_mask |= eSymbolContextTarget;
if (module_sp) resolved_mask |= eSymbolContextModule;
if (comp_unit) resolved_mask |= eSymbolContextCompUnit;
if (function) resolved_mask |= eSymbolContextFunction;
if (block) resolved_mask |= eSymbolContextBlock;
if (line_entry.IsValid()) resolved_mask |= eSymbolContextLineEntry;
if (symbol) resolved_mask |= eSymbolContextSymbol;
return resolved_mask;
}
void
SymbolContext::Dump(Stream *s, Target *target) const
{
*s << (void *)this << ": ";
s->Indent();
s->PutCString("SymbolContext");
s->IndentMore();
s->EOL();
s->IndentMore();
s->Indent();
*s << "Module = " << (void *)module_sp.get() << ' ';
if (module_sp)
module_sp->GetFileSpec().Dump(s);
s->EOL();
s->Indent();
*s << "CompileUnit = " << (void *)comp_unit;
if (comp_unit != NULL)
*s << " {0x" << comp_unit->GetID() << "} " << *(static_cast<FileSpec*> (comp_unit));
s->EOL();
s->Indent();
*s << "Function = " << (void *)function;
if (function != NULL)
{
*s << " {0x" << function->GetID() << "} " << function->GetType()->GetName() << ", address-range = ";
function->GetAddressRange().Dump(s, target, Address::DumpStyleLoadAddress, Address::DumpStyleModuleWithFileAddress);
s->EOL();
s->Indent();
Type* func_type = function->GetType();
if (func_type)
{
*s << " Type = ";
func_type->Dump (s, false);
}
}
s->EOL();
s->Indent();
*s << "Block = " << (void *)block;
if (block != NULL)
*s << " {0x" << block->GetID() << '}';
// Dump the block and pass it a negative depth to we print all the parent blocks
//if (block != NULL)
// block->Dump(s, function->GetFileAddress(), INT_MIN);
s->EOL();
s->Indent();
*s << "LineEntry = ";
line_entry.Dump (s, target, true, Address::DumpStyleLoadAddress, Address::DumpStyleModuleWithFileAddress, true);
s->EOL();
s->Indent();
*s << "Symbol = " << (void *)symbol;
if (symbol != NULL && symbol->GetMangled())
*s << ' ' << symbol->GetMangled().GetName().AsCString();
s->EOL();
s->IndentLess();
s->IndentLess();
}
bool
lldb_private::operator== (const SymbolContext& lhs, const SymbolContext& rhs)
{
return lhs.function == rhs.function
&& lhs.symbol == rhs.symbol
&& lhs.module_sp.get() == rhs.module_sp.get()
&& lhs.comp_unit == rhs.comp_unit
&& lhs.target_sp.get() == rhs.target_sp.get()
&& LineEntry::Compare(lhs.line_entry, rhs.line_entry) == 0;
}
bool
lldb_private::operator!= (const SymbolContext& lhs, const SymbolContext& rhs)
{
return lhs.function != rhs.function
|| lhs.symbol != rhs.symbol
|| lhs.module_sp.get() != rhs.module_sp.get()
|| lhs.comp_unit != rhs.comp_unit
|| lhs.target_sp.get() != rhs.target_sp.get()
|| LineEntry::Compare(lhs.line_entry, rhs.line_entry) != 0;
}
bool
SymbolContext::GetAddressRange (uint32_t scope,
uint32_t range_idx,
bool use_inline_block_range,
AddressRange &range) const
{
if ((scope & eSymbolContextLineEntry) && line_entry.IsValid())
{
range = line_entry.range;
return true;
}
if ((scope & eSymbolContextBlock) && (block != NULL))
{
if (use_inline_block_range)
{
Block *inline_block = block->GetContainingInlinedBlock();
if (inline_block)
return inline_block->GetRangeAtIndex (range_idx, range);
}
else
{
return block->GetRangeAtIndex (range_idx, range);
}
}
if ((scope & eSymbolContextFunction) && (function != NULL))
{
if (range_idx == 0)
{
range = function->GetAddressRange();
return true;
}
}
if ((scope & eSymbolContextSymbol) && (symbol != NULL) && (symbol->GetAddressRangePtr() != NULL))
{
if (range_idx == 0)
{
range = *symbol->GetAddressRangePtr();
if (range.GetByteSize() == 0)
{
if (module_sp)
{
ObjectFile *objfile = module_sp->GetObjectFile();
if (objfile)
{
Symtab *symtab = objfile->GetSymtab();
if (symtab)
range.SetByteSize(symtab->CalculateSymbolSize (symbol));
}
}
}
return true;
}
}
range.Clear();
return false;
}
ClangNamespaceDecl
SymbolContext::FindNamespace (const ConstString &name) const
{
ClangNamespaceDecl namespace_decl;
if (module_sp)
namespace_decl = module_sp->GetSymbolVendor()->FindNamespace (*this, name);
return namespace_decl;
}
size_t
SymbolContext::FindFunctionsByName (const ConstString &name,
bool include_symbols,
bool append,
SymbolContextList &sc_list) const
{
if (!append)
sc_list.Clear();
if (function != NULL)
{
// FIXME: Look in the class of the current function, if it exists,
// for methods matching name.
}
if (module_sp != NULL)
module_sp->FindFunctions (name, eFunctionNameTypeBase | eFunctionNameTypeFull, include_symbols, true, sc_list);
if (target_sp)
target_sp->GetImages().FindFunctions (name, eFunctionNameTypeBase | eFunctionNameTypeFull, include_symbols, true, sc_list);
return sc_list.GetSize();
}
//lldb::VariableSP
//SymbolContext::FindVariableByName (const char *name) const
//{
// lldb::VariableSP return_value;
// return return_value;
//}
lldb::TypeSP
SymbolContext::FindTypeByName (const ConstString &name) const
{
lldb::TypeSP return_value;
TypeList types;
if (module_sp && module_sp->FindTypes (*this, name, false, 1, types))
return types.GetTypeAtIndex(0);
SymbolContext sc_for_global_search;
sc_for_global_search.target_sp = target_sp;
if (!return_value.get() && target_sp && target_sp->GetImages().FindTypes (sc_for_global_search, name, false, 1, types))
return types.GetTypeAtIndex(0);
return return_value;
}
//----------------------------------------------------------------------
//
// SymbolContextSpecifier
//
//----------------------------------------------------------------------
bool
SymbolContextSpecifier::AddLineSpecification (uint32_t line_no, SpecificationType type)
{
bool return_value = true;
switch (type)
{
case eNothingSpecified:
Clear();
break;
case eLineStartSpecified:
m_start_line = line_no;
m_type |= eLineStartSpecified;
break;
case eLineEndSpecified:
m_end_line = line_no;
m_type |= eLineEndSpecified;
break;
default:
return_value = false;
break;
}
return return_value;
}
bool
SymbolContextSpecifier::AddSpecification (const char *spec_string, SpecificationType type)
{
bool return_value = true;
switch (type)
{
case eNothingSpecified:
Clear();
break;
case eModuleSpecified:
{
// See if we can find the Module, if so stick it in the SymbolContext.
FileSpec module_spec(spec_string, false);
lldb::ModuleSP module_sp = m_target_sp->GetImages().FindFirstModuleForFileSpec (module_spec, NULL, NULL);
m_type |= eModuleSpecified;
if (module_sp)
m_module_sp = module_sp;
else
m_module_spec.assign (spec_string);
}
break;
case eFileSpecified:
// CompUnits can't necessarily be resolved here, since an inlined function might show up in
// a number of CompUnits. Instead we just convert to a FileSpec and store it away.
m_file_spec_ap.reset (new FileSpec (spec_string, false));
m_type |= eFileSpecified;
break;
case eLineStartSpecified:
m_start_line = Args::StringToSInt32(spec_string, 0, 0, &return_value);
if (return_value)
m_type |= eLineStartSpecified;
break;
case eLineEndSpecified:
m_end_line = Args::StringToSInt32(spec_string, 0, 0, &return_value);
if (return_value)
m_type |= eLineEndSpecified;
break;
case eFunctionSpecified:
m_function_spec.assign(spec_string);
m_type |= eFunctionSpecified;
break;
case eClassOrNamespaceSpecified:
Clear();
m_class_name.assign (spec_string);
m_type = eClassOrNamespaceSpecified;
break;
case eAddressRangeSpecified:
// Not specified yet...
break;
}
return return_value;
}
void
SymbolContextSpecifier::Clear()
{
m_module_spec.clear();
m_file_spec_ap.reset();
m_function_spec.clear();
m_class_name.clear();
m_start_line = 0;
m_end_line = 0;
m_address_range_ap.reset();
m_type = eNothingSpecified;
}
bool
SymbolContextSpecifier::SymbolContextMatches(SymbolContext &sc)
{
if (m_type == eNothingSpecified)
return true;
if (m_target_sp.get() != sc.target_sp.get())
return false;
if (m_type & eModuleSpecified)
{
if (sc.module_sp)
{
if (m_module_sp.get() != NULL)
{
if (m_module_sp.get() != sc.module_sp.get())
return false;
}
else
{
FileSpec module_file_spec (m_module_spec.c_str(), false);
if (!FileSpec::Equal (module_file_spec, sc.module_sp->GetFileSpec(), false))
return false;
}
}
}
if (m_type & eFileSpecified)
{
if (m_file_spec_ap.get())
{
// If we don't have a block or a comp_unit, then we aren't going to match a source file.
if (sc.block == NULL && sc.comp_unit == NULL)
return false;
// Check if the block is present, and if so is it inlined:
bool was_inlined = false;
if (sc.block != NULL)
{
const InlineFunctionInfo *inline_info = sc.block->GetInlinedFunctionInfo();
if (inline_info != NULL)
{
was_inlined = true;
if (!FileSpec::Equal (inline_info->GetDeclaration().GetFile(), *(m_file_spec_ap.get()), false))
return false;
}
}
// Next check the comp unit, but only if the SymbolContext was not inlined.
if (!was_inlined && sc.comp_unit != NULL)
{
if (!FileSpec::Equal (*(sc.comp_unit), *(m_file_spec_ap.get()), false))
return false;
}
}
}
if (m_type & eLineStartSpecified
|| m_type & eLineEndSpecified)
{
if (sc.line_entry.line < m_start_line || sc.line_entry.line > m_end_line)
return false;
}
if (m_type & eFunctionSpecified)
{
// First check the current block, and if it is inlined, get the inlined function name:
bool was_inlined = false;
ConstString func_name(m_function_spec.c_str());
if (sc.block != NULL)
{
const InlineFunctionInfo *inline_info = sc.block->GetInlinedFunctionInfo();
if (inline_info != NULL)
{
was_inlined = true;
const Mangled &name = inline_info->GetMangled();
if (!name.NameMatches (func_name))
return false;
}
}
// If it wasn't inlined, check the name in the function or symbol:
if (!was_inlined)
{
if (sc.function != NULL)
{
if (!sc.function->GetMangled().NameMatches(func_name))
return false;
}
else if (sc.symbol != NULL)
{
if (!sc.symbol->GetMangled().NameMatches(func_name))
return false;
}
}
}
return true;
}
bool
SymbolContextSpecifier::AddressMatches(lldb::addr_t addr)
{
if (m_type & eAddressRangeSpecified)
{
}
else
{
Address match_address (addr, NULL);
SymbolContext sc;
m_target_sp->GetImages().ResolveSymbolContextForAddress(match_address, eSymbolContextEverything, sc);
return SymbolContextMatches(sc);
}
return true;
}
void
SymbolContextSpecifier::GetDescription (Stream *s, lldb::DescriptionLevel level) const
{
char path_str[PATH_MAX + 1];
if (m_type == eNothingSpecified)
{
s->Printf ("Nothing specified.\n");
}
if (m_type == eModuleSpecified)
{
s->Indent();
if (m_module_sp)
{
m_module_sp->GetFileSpec().GetPath (path_str, PATH_MAX);
s->Printf ("Module: %s\n", path_str);
}
else
s->Printf ("Module: %s\n", m_module_spec.c_str());
}
if (m_type == eFileSpecified && m_file_spec_ap.get() != NULL)
{
m_file_spec_ap->GetPath (path_str, PATH_MAX);
s->Indent();
s->Printf ("File: %s", path_str);
if (m_type == eLineStartSpecified)
{
s->Printf (" from line %d", m_start_line);
if (m_type == eLineEndSpecified)
s->Printf ("to line %d", m_end_line);
else
s->Printf ("to end", m_end_line);
}
else if (m_type == eLineEndSpecified)
{
s->Printf (" from start to line %d", m_end_line);
}
s->Printf (".\n");
}
if (m_type == eLineStartSpecified)
{
s->Indent();
s->Printf ("From line %d", m_start_line);
if (m_type == eLineEndSpecified)
s->Printf ("to line %d", m_end_line);
else
s->Printf ("to end", m_end_line);
s->Printf (".\n");
}
else if (m_type == eLineEndSpecified)
{
s->Printf ("From start to line %d.\n", m_end_line);
}
if (m_type == eFunctionSpecified)
{
s->Indent();
s->Printf ("Function: %s.\n", m_function_spec.c_str());
}
if (m_type == eClassOrNamespaceSpecified)
{
s->Indent();
s->Printf ("Class name: %s.\n", m_class_name.c_str());
}
if (m_type == eAddressRangeSpecified && m_address_range_ap.get() != NULL)
{
s->Indent();
s->PutCString ("Address range: ");
m_address_range_ap->Dump (s, m_target_sp.get(), Address::DumpStyleLoadAddress, Address::DumpStyleFileAddress);
s->PutCString ("\n");
}
}
//----------------------------------------------------------------------
//
// SymbolContextList
//
//----------------------------------------------------------------------
SymbolContextList::SymbolContextList() :
m_symbol_contexts()
{
}
SymbolContextList::~SymbolContextList()
{
}
void
SymbolContextList::Append(const SymbolContext& sc)
{
m_symbol_contexts.push_back(sc);
}
bool
SymbolContextList::AppendIfUnique (const SymbolContext& sc, bool merge_symbol_into_function)
{
collection::iterator pos, end = m_symbol_contexts.end();
for (pos = m_symbol_contexts.begin(); pos != end; ++pos)
{
if (*pos == sc)
return false;
}
if (merge_symbol_into_function
&& sc.symbol != NULL
&& sc.comp_unit == NULL
&& sc.function == NULL
&& sc.block == NULL
&& sc.line_entry.IsValid() == false)
{
const AddressRange *symbol_range = sc.symbol->GetAddressRangePtr();
if (symbol_range)
{
for (pos = m_symbol_contexts.begin(); pos != end; ++pos)
{
if (pos->function)
{
if (pos->function->GetAddressRange().GetBaseAddress() == symbol_range->GetBaseAddress())
{
// Do we already have a function with this symbol?
if (pos->symbol == sc.symbol)
return false;
if (pos->symbol == NULL)
{
pos->symbol = sc.symbol;
return false;
}
}
}
}
}
}
m_symbol_contexts.push_back(sc);
return true;
}
void
SymbolContextList::Clear()
{
m_symbol_contexts.clear();
}
void
SymbolContextList::Dump(Stream *s, Target *target) const
{
*s << (void *)this << ": ";
s->Indent();
s->PutCString("SymbolContextList");
s->EOL();
s->IndentMore();
collection::const_iterator pos, end = m_symbol_contexts.end();
for (pos = m_symbol_contexts.begin(); pos != end; ++pos)
{
pos->Dump(s, target);
}
s->IndentLess();
}
bool
SymbolContextList::GetContextAtIndex(uint32_t idx, SymbolContext& sc) const
{
if (idx < m_symbol_contexts.size())
{
sc = m_symbol_contexts[idx];
return true;
}
return false;
}
bool
SymbolContextList::RemoveContextAtIndex (uint32_t idx)
{
if (idx < m_symbol_contexts.size())
{
m_symbol_contexts.erase(m_symbol_contexts.begin() + idx);
return true;
}
return false;
}
uint32_t
SymbolContextList::GetSize() const
{
return m_symbol_contexts.size();
}
uint32_t
SymbolContextList::NumLineEntriesWithLine (uint32_t line) const
{
uint32_t match_count = 0;
const uint32_t size = m_symbol_contexts.size();
for (uint32_t idx = 0; idx<size; ++idx)
{
if (m_symbol_contexts[idx].line_entry.line == line)
++match_count;
}
return match_count;
}
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