ThreadPlanCallFunctionUsingABI.cpp

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//===-- ThreadPlanCallFunctionUsingABI.cpp --------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#include "lldb/Target/ThreadPlanCallFunctionUsingABI.h"
#include "lldb/Core/Address.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/Stream.h"
 
using namespace lldb;
using namespace lldb_private;
 
// ThreadPlanCallFunctionUsingABI: Plan to call a single function using the ABI
// instead of JIT
ThreadPlanCallFunctionUsingABI::ThreadPlanCallFunctionUsingABI(
    Thread &thread, const Address &function, llvm::Type &prototype,
    llvm::Type &return_type, llvm::ArrayRef<ABI::CallArgument> args,
    const EvaluateExpressionOptions &options)
    : ThreadPlanCallFunction(thread, function, options),
      m_return_type(return_type) {
  lldb::addr_t start_load_addr = LLDB_INVALID_ADDRESS;
  lldb::addr_t function_load_addr = LLDB_INVALID_ADDRESS;
  ABI *abi = nullptr;
 
  if (!ConstructorSetup(thread, abi, start_load_addr, function_load_addr))
    return;
 
  if (!abi->PrepareTrivialCall(thread, m_function_sp, function_load_addr,
                               start_load_addr, prototype, args))
    return;
 
  ReportRegisterState("ABI Function call was set up.  Register state was:");
 
  m_valid = true;
}
 
ThreadPlanCallFunctionUsingABI::~ThreadPlanCallFunctionUsingABI() = default;
 
void ThreadPlanCallFunctionUsingABI::GetDescription(Stream *s,
                                                    DescriptionLevel level) {
  if (level == eDescriptionLevelBrief) {
    s->Printf("Function call thread plan using ABI instead of JIT");
  } else {
    s->Printf("Thread plan to call 0x%" PRIx64 " using ABI instead of JIT",
              m_function_addr.GetLoadAddress(&GetTarget()));
  }
}
 
void ThreadPlanCallFunctionUsingABI::SetReturnValue() {
  const ABI *abi = m_process.GetABI().get();
 
  // Ask the abi for the return value
  if (abi) {
    const bool persistent = false;
    m_return_valobj_sp =
        abi->GetReturnValueObject(GetThread(), m_return_type, persistent);
  }
}