ThreadPlanCallFunctionUsingABI.cpp revision 360660 
1//===-- ThreadPlanCallFunctionUsingABI.cpp ----------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "lldb/Target/ThreadPlanCallFunctionUsingABI.h"
10#include "lldb/Core/Address.h"
11#include "lldb/Target/Process.h"
12#include "lldb/Target/RegisterContext.h"
13#include "lldb/Target/Target.h"
14#include "lldb/Target/Thread.h"
15#include "lldb/Utility/Log.h"
16#include "lldb/Utility/Stream.h"
17
18using namespace lldb;
19using namespace lldb_private;
20
21// ThreadPlanCallFunctionUsingABI: Plan to call a single function using the ABI
22// instead of JIT
23ThreadPlanCallFunctionUsingABI::ThreadPlanCallFunctionUsingABI(
24    Thread &thread, const Address &function, llvm::Type &prototype,
25    llvm::Type &return_type, llvm::ArrayRef<ABI::CallArgument> args,
26    const EvaluateExpressionOptions &options)
27    : ThreadPlanCallFunction(thread, function, options),
28      m_return_type(return_type) {
29  lldb::addr_t start_load_addr = LLDB_INVALID_ADDRESS;
30  lldb::addr_t function_load_addr = LLDB_INVALID_ADDRESS;
31  ABI *abi = nullptr;
32
33  if (!ConstructorSetup(thread, abi, start_load_addr, function_load_addr))
34    return;
35
36  if (!abi->PrepareTrivialCall(thread, m_function_sp, function_load_addr,
37                               start_load_addr, prototype, args))
38    return;
39
40  ReportRegisterState("ABI Function call was set up.  Register state was:");
41
42  m_valid = true;
43}
44
45ThreadPlanCallFunctionUsingABI::~ThreadPlanCallFunctionUsingABI() = default;
46
47void ThreadPlanCallFunctionUsingABI::GetDescription(Stream *s,
48                                                    DescriptionLevel level) {
49  if (level == eDescriptionLevelBrief) {
50    s->Printf("Function call thread plan using ABI instead of JIT");
51  } else {
52    TargetSP target_sp(m_thread.CalculateTarget());
53    s->Printf("Thread plan to call 0x%" PRIx64 " using ABI instead of JIT",
54              m_function_addr.GetLoadAddress(target_sp.get()));
55  }
56}
57
58void ThreadPlanCallFunctionUsingABI::SetReturnValue() {
59  ProcessSP process_sp(m_thread.GetProcess());
60  const ABI *abi = process_sp ? process_sp->GetABI().get() : nullptr;
61
62  // Ask the abi for the return value
63  if (abi) {
64    const bool persistent = false;
65    m_return_valobj_sp =
66        abi->GetReturnValueObject(m_thread, m_return_type, persistent);
67  }
68}
69