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[LLDB/Python] Fix segfault on Python scripted entrypoints 

The code that gets the ScriptInterpreter was not considering the
case that it receives a Lua interpreter.

Differential Revision: https://reviews.llvm.org/D92249
This commit is contained in:
Pedro Tammela 2020-11-27 22:29:56 +00:00
parent 137a25f04a
commit d055e3a0eb
2 changed files with 27 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp
View File

@ -7,6 +7,7 @@
//===----------------------------------------------------------------------===//
#include "lldb/Host/Config.h"
#include "lldb/lldb-enumerations.h"
#if LLDB_ENABLE_PYTHON
@ -214,6 +215,12 @@ extern "C" void *
LLDBSWIGPython_GetDynamicSetting(void *module, const char *setting,
const lldb::TargetSP &target_sp);
static ScriptInterpreterPythonImpl *GetPythonInterpreter(Debugger &debugger) {
ScriptInterpreter *script_interpreter =
debugger.GetScriptInterpreter(true, lldb::eScriptLanguagePython);
return static_cast<ScriptInterpreterPythonImpl *>(script_interpreter);
}
static bool g_initialized = false;
namespace {
@ -1825,11 +1832,10 @@ StructuredData::ObjectSP ScriptInterpreterPythonImpl::CreateScriptedThreadPlan(
return {};
Debugger &debugger = thread_plan_sp->GetTarget().GetDebugger();
ScriptInterpreter *script_interpreter = debugger.GetScriptInterpreter();
ScriptInterpreterPythonImpl *python_interpreter =
static_cast<ScriptInterpreterPythonImpl *>(script_interpreter);
GetPythonInterpreter(debugger);
if (!script_interpreter)
if (!python_interpreter)
return {};
void *ret_val;
@ -1929,11 +1935,10 @@ ScriptInterpreterPythonImpl::CreateScriptedBreakpointResolver(
return StructuredData::GenericSP();
Debugger &debugger = bkpt_sp->GetTarget().GetDebugger();
ScriptInterpreter *script_interpreter = debugger.GetScriptInterpreter();
ScriptInterpreterPythonImpl *python_interpreter =
static_cast<ScriptInterpreterPythonImpl *>(script_interpreter);
GetPythonInterpreter(debugger);
if (!script_interpreter)
if (!python_interpreter)
return StructuredData::GenericSP();
void *ret_val;
@ -2003,11 +2008,10 @@ StructuredData::GenericSP ScriptInterpreterPythonImpl::CreateScriptedStopHook(
return StructuredData::GenericSP();
}
ScriptInterpreter *script_interpreter = m_debugger.GetScriptInterpreter();
ScriptInterpreterPythonImpl *python_interpreter =
static_cast<ScriptInterpreterPythonImpl *>(script_interpreter);
GetPythonInterpreter(m_debugger);
if (!script_interpreter) {
if (!python_interpreter) {
error.SetErrorString("No script interpreter for scripted stop-hook.");
return StructuredData::GenericSP();
}
@ -2103,11 +2107,10 @@ ScriptInterpreterPythonImpl::CreateSyntheticScriptedProvider(
return StructuredData::ObjectSP();
Debugger &debugger = target->GetDebugger();
ScriptInterpreter *script_interpreter = debugger.GetScriptInterpreter();
ScriptInterpreterPythonImpl *python_interpreter =
(ScriptInterpreterPythonImpl *)script_interpreter;
GetPythonInterpreter(debugger);
if (!script_interpreter)
if (!python_interpreter)
return StructuredData::ObjectSP();
void *ret_val = nullptr;
@ -2274,11 +2277,10 @@ bool ScriptInterpreterPythonImpl::BreakpointCallbackFunction(
return true;
Debugger &debugger = target->GetDebugger();
ScriptInterpreter *script_interpreter = debugger.GetScriptInterpreter();
ScriptInterpreterPythonImpl *python_interpreter =
(ScriptInterpreterPythonImpl *)script_interpreter;
GetPythonInterpreter(debugger);
if (!script_interpreter)
if (!python_interpreter)
return true;
if (python_function_name && python_function_name[0]) {
@ -2340,11 +2342,10 @@ bool ScriptInterpreterPythonImpl::WatchpointCallbackFunction(
return true;
Debugger &debugger = target->GetDebugger();
ScriptInterpreter *script_interpreter = debugger.GetScriptInterpreter();
ScriptInterpreterPythonImpl *python_interpreter =
(ScriptInterpreterPythonImpl *)script_interpreter;
GetPythonInterpreter(debugger);
if (!script_interpreter)
if (!python_interpreter)
return true;
if (python_function_name && python_function_name[0]) {

8
lldb/test/Shell/ScriptInterpreter/Python/scripted_breakpoint_lua.test Normal file
View File

@ -0,0 +1,8 @@
# REQUIRES: python
# UNSUPPORTED: lldb-repro
#
# RUN: cat %s | %lldb --script-language lua 2>&1 | FileCheck %s
b main
breakpoint command add -s python -o 'print(frame); return False'
run
# CHECK: frame #0