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

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//===-- LanguageRuntime.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/LanguageRuntime.h"
#include "lldb/Target/ObjCLanguageRuntime.h"
#include "lldb/Target/Target.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/SearchFilter.h"
#include "lldb/Interpreter/CommandInterpreter.h"
using namespace lldb;
using namespace lldb_private;
class ExceptionSearchFilter : public SearchFilter
{
public:
ExceptionSearchFilter (const lldb::TargetSP &target_sp,
lldb::LanguageType language,
bool update_module_list = true) :
SearchFilter (target_sp),
m_language (language),
m_language_runtime (NULL),
m_filter_sp ()
{
if (update_module_list)
UpdateModuleListIfNeeded ();
}
virtual
~ExceptionSearchFilter() {}
bool
ModulePasses (const lldb::ModuleSP &module_sp) override
{
UpdateModuleListIfNeeded ();
if (m_filter_sp)
return m_filter_sp->ModulePasses (module_sp);
return false;
}
bool
ModulePasses (const FileSpec &spec) override
{
UpdateModuleListIfNeeded ();
if (m_filter_sp)
return m_filter_sp->ModulePasses (spec);
return false;
}
void
Search (Searcher &searcher) override
{
UpdateModuleListIfNeeded ();
if (m_filter_sp)
m_filter_sp->Search (searcher);
}
void
GetDescription (Stream *s) override
{
UpdateModuleListIfNeeded ();
if (m_filter_sp)
m_filter_sp->GetDescription (s);
}
protected:
LanguageType m_language;
LanguageRuntime *m_language_runtime;
SearchFilterSP m_filter_sp;
SearchFilterSP
DoCopyForBreakpoint(Breakpoint &breakpoint) override
{
return SearchFilterSP(new ExceptionSearchFilter(TargetSP(), m_language, false));
}
void
UpdateModuleListIfNeeded ()
{
ProcessSP process_sp (m_target_sp->GetProcessSP());
if (process_sp)
{
bool refreash_filter = !m_filter_sp;
if (m_language_runtime == NULL)
{
m_language_runtime = process_sp->GetLanguageRuntime(m_language);
refreash_filter = true;
}
else
{
LanguageRuntime *language_runtime = process_sp->GetLanguageRuntime(m_language);
if (m_language_runtime != language_runtime)
{
m_language_runtime = language_runtime;
refreash_filter = true;
}
}
if (refreash_filter && m_language_runtime)
{
m_filter_sp = m_language_runtime->CreateExceptionSearchFilter ();
}
}
else
{
m_filter_sp.reset();
m_language_runtime = NULL;
}
}
};
// The Target is the one that knows how to create breakpoints, so this function
// is meant to be used either by the target or internally in Set/ClearExceptionBreakpoints.
class ExceptionBreakpointResolver : public BreakpointResolver
{
public:
ExceptionBreakpointResolver (lldb::LanguageType language,
bool catch_bp,
bool throw_bp) :
BreakpointResolver (NULL, BreakpointResolver::ExceptionResolver),
m_language (language),
m_language_runtime (NULL),
m_catch_bp (catch_bp),
m_throw_bp (throw_bp)
{
}
virtual
~ExceptionBreakpointResolver()
{
}
Searcher::CallbackReturn
SearchCallback (SearchFilter &filter,
SymbolContext &context,
Address *addr,
bool containing) override
{
if (SetActualResolver())
return m_actual_resolver_sp->SearchCallback (filter, context, addr, containing);
else
return eCallbackReturnStop;
}
Searcher::Depth
GetDepth () override
{
if (SetActualResolver())
return m_actual_resolver_sp->GetDepth();
else
return eDepthTarget;
}
void
GetDescription (Stream *s) override
{
s->Printf ("Exception breakpoint (catch: %s throw: %s)",
m_catch_bp ? "on" : "off",
m_throw_bp ? "on" : "off");
SetActualResolver();
if (m_actual_resolver_sp)
{
s->Printf (" using: ");
m_actual_resolver_sp->GetDescription (s);
}
else
s->Printf (" the correct runtime exception handler will be determined when you run");
}
void
Dump (Stream *s) const override
{
}
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const BreakpointResolverName *) { return true; }
static inline bool classof(const BreakpointResolver *V) {
return V->getResolverID() == BreakpointResolver::ExceptionResolver;
}
protected:
BreakpointResolverSP
CopyForBreakpoint (Breakpoint &breakpoint) override
{
return BreakpointResolverSP(new ExceptionBreakpointResolver(m_language, m_catch_bp, m_throw_bp));
}
bool
SetActualResolver()
{
ProcessSP process_sp;
if (m_breakpoint)
{
process_sp = m_breakpoint->GetTarget().GetProcessSP();
if (process_sp)
{
bool refreash_resolver = !m_actual_resolver_sp;
if (m_language_runtime == NULL)
{
m_language_runtime = process_sp->GetLanguageRuntime(m_language);
refreash_resolver = true;
}
else
{
LanguageRuntime *language_runtime = process_sp->GetLanguageRuntime(m_language);
if (m_language_runtime != language_runtime)
{
m_language_runtime = language_runtime;
refreash_resolver = true;
}
}
if (refreash_resolver && m_language_runtime)
{
m_actual_resolver_sp = m_language_runtime->CreateExceptionResolver (m_breakpoint, m_catch_bp, m_throw_bp);
}
}
else
{
m_actual_resolver_sp.reset();
m_language_runtime = NULL;
}
}
else
{
m_actual_resolver_sp.reset();
m_language_runtime = NULL;
}
return (bool)m_actual_resolver_sp;
}
lldb::BreakpointResolverSP m_actual_resolver_sp;
lldb::LanguageType m_language;
LanguageRuntime *m_language_runtime;
bool m_catch_bp;
bool m_throw_bp;
};
LanguageRuntime*
LanguageRuntime::FindPlugin (Process *process, lldb::LanguageType language)
{
std::unique_ptr<LanguageRuntime> language_runtime_ap;
LanguageRuntimeCreateInstance create_callback;
for (uint32_t idx = 0;
(create_callback = PluginManager::GetLanguageRuntimeCreateCallbackAtIndex(idx)) != NULL;
++idx)
{
language_runtime_ap.reset (create_callback(process, language));
if (language_runtime_ap.get())
return language_runtime_ap.release();
}
return NULL;
}
//----------------------------------------------------------------------
// Constructor
//----------------------------------------------------------------------
LanguageRuntime::LanguageRuntime(Process *process) :
m_process (process)
{
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
LanguageRuntime::~LanguageRuntime()
{
}
Breakpoint::BreakpointPreconditionSP
LanguageRuntime::CreateExceptionPrecondition (lldb::LanguageType language,
bool catch_bp,
bool throw_bp)
{
switch (language)
{
case eLanguageTypeObjC:
if (throw_bp)
return Breakpoint::BreakpointPreconditionSP(new ObjCLanguageRuntime::ObjCExceptionPrecondition ());
break;
default:
break;
}
return Breakpoint::BreakpointPreconditionSP();
}
BreakpointSP
LanguageRuntime::CreateExceptionBreakpoint (Target &target,
lldb::LanguageType language,
bool catch_bp,
bool throw_bp,
bool is_internal)
{
BreakpointResolverSP resolver_sp(new ExceptionBreakpointResolver(language, catch_bp, throw_bp));
SearchFilterSP filter_sp(new ExceptionSearchFilter(target.shared_from_this(), language));
bool hardware = false;
bool resolve_indirect_functions = false;
BreakpointSP exc_breakpt_sp (target.CreateBreakpoint (filter_sp, resolver_sp, is_internal, hardware, resolve_indirect_functions));
if (exc_breakpt_sp)
{
Breakpoint::BreakpointPreconditionSP precondition_sp = CreateExceptionPrecondition(language, catch_bp, throw_bp);
if (precondition_sp)
exc_breakpt_sp->SetPrecondition(precondition_sp);
if (is_internal)
exc_breakpt_sp->SetBreakpointKind("exception");
}
return exc_breakpt_sp;
}
struct language_name_pair {
const char *name;
LanguageType type;
};
struct language_name_pair language_names[] =
{
// To allow GetNameForLanguageType to be a simple array lookup, the first
// part of this array must follow enum LanguageType exactly.
{ "unknown", eLanguageTypeUnknown },
{ "c89", eLanguageTypeC89 },
{ "c", eLanguageTypeC },
{ "ada83", eLanguageTypeAda83 },
{ "c++", eLanguageTypeC_plus_plus },
{ "cobol74", eLanguageTypeCobol74 },
{ "cobol85", eLanguageTypeCobol85 },
{ "fortran77", eLanguageTypeFortran77 },
{ "fortran90", eLanguageTypeFortran90 },
{ "pascal83", eLanguageTypePascal83 },
{ "modula2", eLanguageTypeModula2 },
{ "java", eLanguageTypeJava },
{ "c99", eLanguageTypeC99 },
{ "ada95", eLanguageTypeAda95 },
{ "fortran95", eLanguageTypeFortran95 },
{ "pli", eLanguageTypePLI },
{ "objective-c", eLanguageTypeObjC },
{ "objective-c++", eLanguageTypeObjC_plus_plus },
{ "upc", eLanguageTypeUPC },
{ "d", eLanguageTypeD },
{ "python", eLanguageTypePython },
{ "opencl", eLanguageTypeOpenCL },
{ "go", eLanguageTypeGo },
{ "modula3", eLanguageTypeModula3 },
{ "haskell", eLanguageTypeHaskell },
{ "c++03", eLanguageTypeC_plus_plus_03 },
{ "c++11", eLanguageTypeC_plus_plus_11 },
{ "ocaml", eLanguageTypeOCaml },
{ "rust", eLanguageTypeRust },
{ "c11", eLanguageTypeC11 },
{ "swift", eLanguageTypeSwift },
{ "julia", eLanguageTypeJulia },
{ "dylan", eLanguageTypeDylan },
{ "c++14", eLanguageTypeC_plus_plus_14 },
{ "fortran03", eLanguageTypeFortran03 },
{ "fortran08", eLanguageTypeFortran08 },
// Vendor Extensions
{ "mipsassem", eLanguageTypeMipsAssembler },
{ "renderscript", eLanguageTypeExtRenderScript},
// Now synonyms, in arbitrary order
{ "objc", eLanguageTypeObjC },
{ "objc++", eLanguageTypeObjC_plus_plus },
{ "pascal", eLanguageTypePascal83 }
};
static uint32_t num_languages = sizeof(language_names) / sizeof (struct language_name_pair);
LanguageType
LanguageRuntime::GetLanguageTypeFromString (const char *string)
{
for (uint32_t i = 0; i < num_languages; i++)
{
if (strcasecmp (language_names[i].name, string) == 0)
return (LanguageType) language_names[i].type;
}
return eLanguageTypeUnknown;
}
const char *
LanguageRuntime::GetNameForLanguageType (LanguageType language)
{
if (language < num_languages)
return language_names[language].name;
else
return language_names[eLanguageTypeUnknown].name;
}
void
LanguageRuntime::PrintAllLanguages (Stream &s, const char *prefix, const char *suffix)
{
for (uint32_t i = 1; i < num_languages; i++)
{
s.Printf("%s%s%s", prefix, language_names[i].name, suffix);
}
}
bool
LanguageRuntime::LanguageIsCPlusPlus (LanguageType language)
{
switch (language)
{
case eLanguageTypeC_plus_plus:
case eLanguageTypeC_plus_plus_03:
case eLanguageTypeC_plus_plus_11:
case eLanguageTypeC_plus_plus_14:
return true;
default:
return false;
}
}
bool
LanguageRuntime::LanguageIsObjC (LanguageType language)
{
switch (language)
{
case eLanguageTypeObjC:
case eLanguageTypeObjC_plus_plus:
return true;
default:
return false;
}
}
bool
LanguageRuntime::LanguageIsC (LanguageType language)
{
switch (language)
{
case eLanguageTypeC:
case eLanguageTypeC89:
case eLanguageTypeC99:
case eLanguageTypeC11:
return true;
default:
return false;
}
}
bool
LanguageRuntime::LanguageIsPascal (LanguageType language)
{
switch (language)
{
case eLanguageTypePascal83:
return true;
default:
return false;
}
}
void
LanguageRuntime::InitializeCommands (CommandObject* parent)
{
if (!parent)
return;
if (!parent->IsMultiwordObject())
return;
LanguageRuntimeCreateInstance create_callback;
for (uint32_t idx = 0;
(create_callback = PluginManager::GetLanguageRuntimeCreateCallbackAtIndex(idx)) != nullptr;
++idx)
{
if (LanguageRuntimeGetCommandObject command_callback =
PluginManager::GetLanguageRuntimeGetCommandObjectAtIndex(idx))
{
CommandObjectSP command = command_callback(parent->GetCommandInterpreter());
if (command)
{
parent->LoadSubCommand(command->GetCommandName(), command);
}
}
}
}
lldb::SearchFilterSP
LanguageRuntime::CreateExceptionSearchFilter ()
{
return m_process->GetTarget().GetSearchFilterForModule(NULL);
}
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