llvm-project/lldb/source/Breakpoint/BreakpointResolverName.cpp

393 lines
14 KiB
C++

//===-- BreakpointResolverName.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
// Project includes
#include "lldb/Breakpoint/BreakpointResolverName.h"
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Symbol/Block.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Symbol/SymbolContext.h"
#include "Plugins/Language/ObjC/ObjCLanguage.h"
#include "Plugins/Language/CPlusPlus/CPlusPlusLanguage.h"
using namespace lldb;
using namespace lldb_private;
BreakpointResolverName::BreakpointResolverName (Breakpoint *bkpt,
const char *name_cstr,
uint32_t name_type_mask,
LanguageType language,
Breakpoint::MatchType type,
lldb::addr_t offset,
bool skip_prologue) :
BreakpointResolver (bkpt, BreakpointResolver::NameResolver, offset),
m_class_name (),
m_regex (),
m_match_type (type),
m_language (language),
m_skip_prologue (skip_prologue)
{
if (m_match_type == Breakpoint::Regexp)
{
if (!m_regex.Compile (name_cstr))
{
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_BREAKPOINTS));
if (log)
log->Warning ("function name regexp: \"%s\" did not compile.", name_cstr);
}
}
else
{
AddNameLookup (ConstString(name_cstr), name_type_mask);
}
}
BreakpointResolverName::BreakpointResolverName (Breakpoint *bkpt,
const char *names[],
size_t num_names,
uint32_t name_type_mask,
LanguageType language,
lldb::addr_t offset,
bool skip_prologue) :
BreakpointResolver (bkpt, BreakpointResolver::NameResolver, offset),
m_match_type (Breakpoint::Exact),
m_language (language),
m_skip_prologue (skip_prologue)
{
for (size_t i = 0; i < num_names; i++)
{
AddNameLookup (ConstString (names[i]), name_type_mask);
}
}
BreakpointResolverName::BreakpointResolverName (Breakpoint *bkpt,
std::vector<std::string> names,
uint32_t name_type_mask,
LanguageType language,
lldb::addr_t offset,
bool skip_prologue) :
BreakpointResolver (bkpt, BreakpointResolver::NameResolver, offset),
m_match_type (Breakpoint::Exact),
m_language (language),
m_skip_prologue (skip_prologue)
{
for (const std::string& name : names)
{
AddNameLookup (ConstString (name.c_str(), name.size()), name_type_mask);
}
}
BreakpointResolverName::BreakpointResolverName (Breakpoint *bkpt,
RegularExpression &func_regex,
lldb::LanguageType language,
lldb::addr_t offset,
bool skip_prologue) :
BreakpointResolver (bkpt, BreakpointResolver::NameResolver, offset),
m_class_name (nullptr),
m_regex (func_regex),
m_match_type (Breakpoint::Regexp),
m_language (language),
m_skip_prologue (skip_prologue)
{
}
BreakpointResolverName::BreakpointResolverName
(
Breakpoint *bkpt,
const char *class_name,
const char *method,
Breakpoint::MatchType type,
lldb::addr_t offset,
bool skip_prologue
) :
BreakpointResolver (bkpt, BreakpointResolver::NameResolver, offset),
m_class_name (class_name),
m_regex (),
m_match_type (type),
m_language (eLanguageTypeUnknown),
m_skip_prologue (skip_prologue)
{
Module::LookupInfo lookup;
lookup.SetName(ConstString(method));
lookup.SetLookupName(lookup.GetName());
lookup.SetNameTypeMask(eFunctionNameTypeMethod);
m_lookups.push_back (lookup);
}
BreakpointResolverName::~BreakpointResolverName() = default;
BreakpointResolverName::BreakpointResolverName(const BreakpointResolverName &rhs) :
BreakpointResolver(rhs.m_breakpoint, BreakpointResolver::NameResolver, rhs.m_offset),
m_lookups(rhs.m_lookups),
m_class_name(rhs.m_class_name),
m_regex(rhs.m_regex),
m_match_type (rhs.m_match_type),
m_language (rhs.m_language),
m_skip_prologue (rhs.m_skip_prologue)
{
}
void
BreakpointResolverName::AddNameLookup (const ConstString &name, uint32_t name_type_mask)
{
ObjCLanguage::MethodName objc_method(name.GetCString(), false);
if (objc_method.IsValid(false))
{
std::vector<ConstString> objc_names;
objc_method.GetFullNames(objc_names, true);
for (ConstString objc_name : objc_names)
{
Module::LookupInfo lookup;
lookup.SetName(name);
lookup.SetLookupName(objc_name);
lookup.SetNameTypeMask(eFunctionNameTypeFull);
m_lookups.push_back (lookup);
}
}
else
{
Module::LookupInfo lookup(name, name_type_mask, m_language);
m_lookups.push_back (lookup);
}
}
// FIXME: Right now we look at the module level, and call the module's "FindFunctions".
// Greg says he will add function tables, maybe at the CompileUnit level to accelerate function
// lookup. At that point, we should switch the depth to CompileUnit, and look in these tables.
Searcher::CallbackReturn
BreakpointResolverName::SearchCallback(SearchFilter &filter,
SymbolContext &context,
Address *addr,
bool containing)
{
SymbolContextList func_list;
//SymbolContextList sym_list;
uint32_t i;
bool new_location;
Address break_addr;
assert (m_breakpoint != nullptr);
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_BREAKPOINTS));
if (m_class_name)
{
if (log)
log->Warning ("Class/method function specification not supported yet.\n");
return Searcher::eCallbackReturnStop;
}
bool filter_by_cu = (filter.GetFilterRequiredItems() & eSymbolContextCompUnit) != 0;
bool filter_by_language = (m_language != eLanguageTypeUnknown);
const bool include_symbols = !filter_by_cu;
const bool include_inlines = true;
const bool append = true;
switch (m_match_type)
{
case Breakpoint::Exact:
if (context.module_sp)
{
for (const auto &lookup : m_lookups)
{
const size_t start_func_idx = func_list.GetSize();
context.module_sp->FindFunctions(lookup.GetLookupName(),
nullptr,
lookup.GetNameTypeMask(),
include_symbols,
include_inlines,
append,
func_list);
const size_t end_func_idx = func_list.GetSize();
if (start_func_idx < end_func_idx)
lookup.Prune (func_list, start_func_idx);
}
}
break;
case Breakpoint::Regexp:
if (context.module_sp)
{
context.module_sp->FindFunctions (m_regex,
!filter_by_cu, // include symbols only if we aren't filtering by CU
include_inlines,
append,
func_list);
}
break;
case Breakpoint::Glob:
if (log)
log->Warning ("glob is not supported yet.");
break;
}
// If the filter specifies a Compilation Unit, remove the ones that don't pass at this point.
if (filter_by_cu || filter_by_language)
{
uint32_t num_functions = func_list.GetSize();
for (size_t idx = 0; idx < num_functions; idx++)
{
bool remove_it = false;
SymbolContext sc;
func_list.GetContextAtIndex(idx, sc);
if (filter_by_cu)
{
if (!sc.comp_unit || !filter.CompUnitPasses(*sc.comp_unit))
remove_it = true;
}
if (filter_by_language)
{
LanguageType sym_language = sc.GetLanguage();
if ((Language::GetPrimaryLanguage(sym_language) !=
Language::GetPrimaryLanguage(m_language)) &&
(sym_language != eLanguageTypeUnknown))
{
remove_it = true;
}
}
if (remove_it)
{
func_list.RemoveContextAtIndex(idx);
num_functions--;
idx--;
}
}
}
// Remove any duplicates between the function list and the symbol list
SymbolContext sc;
if (func_list.GetSize())
{
for (i = 0; i < func_list.GetSize(); i++)
{
if (func_list.GetContextAtIndex(i, sc))
{
bool is_reexported = false;
if (sc.block && sc.block->GetInlinedFunctionInfo())
{
if (!sc.block->GetStartAddress(break_addr))
break_addr.Clear();
}
else if (sc.function)
{
break_addr = sc.function->GetAddressRange().GetBaseAddress();
if (m_skip_prologue && break_addr.IsValid())
{
const uint32_t prologue_byte_size = sc.function->GetPrologueByteSize();
if (prologue_byte_size)
break_addr.SetOffset(break_addr.GetOffset() + prologue_byte_size);
}
}
else if (sc.symbol)
{
if (sc.symbol->GetType() == eSymbolTypeReExported)
{
const Symbol *actual_symbol = sc.symbol->ResolveReExportedSymbol(m_breakpoint->GetTarget());
if (actual_symbol)
{
is_reexported = true;
break_addr = actual_symbol->GetAddress();
}
}
else
{
break_addr = sc.symbol->GetAddress();
}
if (m_skip_prologue && break_addr.IsValid())
{
const uint32_t prologue_byte_size = sc.symbol->GetPrologueByteSize();
if (prologue_byte_size)
break_addr.SetOffset(break_addr.GetOffset() + prologue_byte_size);
}
}
if (break_addr.IsValid())
{
if (filter.AddressPasses(break_addr))
{
BreakpointLocationSP bp_loc_sp (AddLocation(break_addr, &new_location));
bp_loc_sp->SetIsReExported(is_reexported);
if (bp_loc_sp && new_location && !m_breakpoint->IsInternal())
{
if (log)
{
StreamString s;
bp_loc_sp->GetDescription(&s, lldb::eDescriptionLevelVerbose);
log->Printf ("Added location: %s\n", s.GetData());
}
}
}
}
}
}
}
return Searcher::eCallbackReturnContinue;
}
Searcher::Depth
BreakpointResolverName::GetDepth()
{
return Searcher::eDepthModule;
}
void
BreakpointResolverName::GetDescription (Stream *s)
{
if (m_match_type == Breakpoint::Regexp)
s->Printf("regex = '%s'", m_regex.GetText());
else
{
size_t num_names = m_lookups.size();
if (num_names == 1)
s->Printf("name = '%s'", m_lookups[0].GetName().GetCString());
else
{
s->Printf("names = {");
for (size_t i = 0; i < num_names; i++)
{
s->Printf ("%s'%s'", (i == 0 ? "" : ", "), m_lookups[i].GetName().GetCString());
}
s->Printf ("}");
}
}
if (m_language != eLanguageTypeUnknown)
{
s->Printf (", language = %s", Language::GetNameForLanguageType(m_language));
}
}
void
BreakpointResolverName::Dump (Stream *s) const
{
}
lldb::BreakpointResolverSP
BreakpointResolverName::CopyForBreakpoint (Breakpoint &breakpoint)
{
lldb::BreakpointResolverSP ret_sp(new BreakpointResolverName(*this));
ret_sp->SetBreakpoint(&breakpoint);
return ret_sp;
}