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6961e87847
expressions. Values used by the expression are checked by validation functions which cause the program to crash if the values are unsafe. Major changes: - Added IRDynamicChecks.[ch], which contains the core code related to this feature - Modified CommandObjectExpression to install the validator functions into the target process. - Added an accessor to Process that gets/sets the helper functions llvm-svn: 112690
118 lines
2.7 KiB
C++
118 lines
2.7 KiB
C++
//===-- IRDynamicChecks.cpp -------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Expression/IRDynamicChecks.h"
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#include "lldb/Expression/ClangUtilityFunction.h"
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#include "lldb/Core/Log.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Function.h"
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#include "llvm/Module.h"
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#include "llvm/Value.h"
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using namespace llvm;
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using namespace lldb_private;
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static char ID;
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static const char valid_pointer_check_text[] =
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"extern \"C\" void "
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"___clang_valid_pointer_check (unsigned char *ptr)"
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"{"
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"unsigned char val = *ptr;"
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"}";
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static const char valid_pointer_check_name[] =
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"___clang_valid_pointer_check";
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DynamicCheckerFunctions::DynamicCheckerFunctions ()
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{
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m_valid_pointer_check.reset(new ClangUtilityFunction(valid_pointer_check_text,
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valid_pointer_check_name));
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}
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DynamicCheckerFunctions::~DynamicCheckerFunctions ()
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{
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}
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bool
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DynamicCheckerFunctions::Install(Stream &error_stream,
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ExecutionContext &exe_ctx)
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{
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if (!m_valid_pointer_check->Install(error_stream, exe_ctx))
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return false;
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return true;
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}
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IRDynamicChecks::IRDynamicChecks(DynamicCheckerFunctions &checker_functions,
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const char *func_name) :
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ModulePass(&ID),
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m_checker_functions(checker_functions),
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m_func_name(func_name)
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{
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}
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/* A handy utility function used at several places in the code */
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static std::string
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PrintValue(llvm::Value *V, bool truncate = false)
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{
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std::string s;
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raw_string_ostream rso(s);
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V->print(rso);
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rso.flush();
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if (truncate)
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s.resize(s.length() - 1);
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return s;
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}
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IRDynamicChecks::~IRDynamicChecks()
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{
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}
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bool
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IRDynamicChecks::runOnModule(llvm::Module &M)
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{
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lldb_private::Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS);
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llvm::Function* function = M.getFunction(StringRef(m_func_name.c_str()));
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if (!function)
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{
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if (log)
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log->Printf("Couldn't find %s() in the module", m_func_name.c_str());
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return false;
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}
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llvm::Function::iterator bbi;
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for (bbi = function->begin();
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bbi != function->end();
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++bbi)
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{
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}
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return true;
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}
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void
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IRDynamicChecks::assignPassManager(PMStack &PMS,
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PassManagerType T)
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{
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}
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PassManagerType
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IRDynamicChecks::getPotentialPassManagerType() const
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{
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return PMT_ModulePassManager;
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}
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