1 //===-- ThreadPlanCallUserExpression.cpp ----------------------------------===//
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/ThreadPlanCallUserExpression.h"
10
11 #include "lldb/Breakpoint/Breakpoint.h"
12 #include "lldb/Breakpoint/BreakpointLocation.h"
13 #include "lldb/Core/Address.h"
14 #include "lldb/Expression/DiagnosticManager.h"
15 #include "lldb/Expression/DynamicCheckerFunctions.h"
16 #include "lldb/Expression/UserExpression.h"
17 #include "lldb/Host/HostInfo.h"
18 #include "lldb/Target/LanguageRuntime.h"
19 #include "lldb/Target/Process.h"
20 #include "lldb/Target/RegisterContext.h"
21 #include "lldb/Target/StopInfo.h"
22 #include "lldb/Target/Target.h"
23 #include "lldb/Target/Thread.h"
24 #include "lldb/Target/ThreadPlanRunToAddress.h"
25 #include "lldb/Utility/LLDBLog.h"
26 #include "lldb/Utility/Log.h"
27 #include "lldb/Utility/Stream.h"
28
29 using namespace lldb;
30 using namespace lldb_private;
31
32 // ThreadPlanCallUserExpression: Plan to call a single function
33
ThreadPlanCallUserExpression(Thread & thread,Address & function,llvm::ArrayRef<lldb::addr_t> args,const EvaluateExpressionOptions & options,lldb::UserExpressionSP & user_expression_sp)34 ThreadPlanCallUserExpression::ThreadPlanCallUserExpression(
35 Thread &thread, Address &function, llvm::ArrayRef<lldb::addr_t> args,
36 const EvaluateExpressionOptions &options,
37 lldb::UserExpressionSP &user_expression_sp)
38 : ThreadPlanCallFunction(thread, function, CompilerType(), args, options),
39 m_user_expression_sp(user_expression_sp) {
40 // User expressions are generally "User generated" so we should set them up
41 // to stop when done.
42 SetIsControllingPlan(true);
43 SetOkayToDiscard(false);
44 }
45
46 ThreadPlanCallUserExpression::~ThreadPlanCallUserExpression() = default;
47
GetDescription(Stream * s,lldb::DescriptionLevel level)48 void ThreadPlanCallUserExpression::GetDescription(
49 Stream *s, lldb::DescriptionLevel level) {
50 if (level == eDescriptionLevelBrief)
51 s->Printf("User Expression thread plan");
52 else
53 ThreadPlanCallFunction::GetDescription(s, level);
54 }
55
DidPush()56 void ThreadPlanCallUserExpression::DidPush() {
57 ThreadPlanCallFunction::DidPush();
58 if (m_user_expression_sp)
59 m_user_expression_sp->WillStartExecuting();
60 }
61
DidPop()62 void ThreadPlanCallUserExpression::DidPop() {
63 ThreadPlanCallFunction::DidPop();
64 if (m_user_expression_sp)
65 m_user_expression_sp.reset();
66 }
67
MischiefManaged()68 bool ThreadPlanCallUserExpression::MischiefManaged() {
69 Log *log = GetLog(LLDBLog::Step);
70
71 if (IsPlanComplete()) {
72 LLDB_LOGF(log, "ThreadPlanCallFunction(%p): Completed call function plan.",
73 static_cast<void *>(this));
74
75 if (m_manage_materialization && PlanSucceeded() && m_user_expression_sp) {
76 lldb::addr_t function_stack_top;
77 lldb::addr_t function_stack_bottom;
78 lldb::addr_t function_stack_pointer = GetFunctionStackPointer();
79
80 function_stack_bottom = function_stack_pointer - HostInfo::GetPageSize();
81 function_stack_top = function_stack_pointer;
82
83 DiagnosticManager diagnostics;
84
85 ExecutionContext exe_ctx(GetThread());
86
87 m_user_expression_sp->FinalizeJITExecution(
88 diagnostics, exe_ctx, m_result_var_sp, function_stack_bottom,
89 function_stack_top);
90 }
91
92 ThreadPlan::MischiefManaged();
93 return true;
94 } else {
95 return false;
96 }
97 }
98
GetRealStopInfo()99 StopInfoSP ThreadPlanCallUserExpression::GetRealStopInfo() {
100 StopInfoSP stop_info_sp = ThreadPlanCallFunction::GetRealStopInfo();
101
102 if (stop_info_sp) {
103 lldb::addr_t addr = GetStopAddress();
104 DynamicCheckerFunctions *checkers = m_process.GetDynamicCheckers();
105 StreamString s;
106
107 if (checkers && checkers->DoCheckersExplainStop(addr, s))
108 stop_info_sp->SetDescription(s.GetData());
109 }
110
111 return stop_info_sp;
112 }
113
DoTakedown(bool success)114 void ThreadPlanCallUserExpression::DoTakedown(bool success) {
115 ThreadPlanCallFunction::DoTakedown(success);
116 m_user_expression_sp->DidFinishExecuting();
117 }
118