1 | //===-- Breakpoint.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 "Breakpoint.h" |
10 | #include "DAP.h" |
11 | #include "ProtocolUtils.h" |
12 | #include "lldb/API/SBAddress.h" |
13 | #include "lldb/API/SBBreakpointLocation.h" |
14 | #include "lldb/API/SBLineEntry.h" |
15 | #include "lldb/API/SBMutex.h" |
16 | #include "llvm/ADT/StringExtras.h" |
17 | #include <cstddef> |
18 | #include <cstdint> |
19 | #include <mutex> |
20 | #include <string> |
21 | |
22 | using namespace lldb_dap; |
23 | |
24 | void Breakpoint::SetCondition() { m_bp.SetCondition(m_condition.c_str()); } |
25 | |
26 | void Breakpoint::SetHitCondition() { |
27 | uint64_t hitCount = 0; |
28 | if (llvm::to_integer(S: m_hit_condition, Num&: hitCount)) |
29 | m_bp.SetIgnoreCount(hitCount - 1); |
30 | } |
31 | |
32 | protocol::Breakpoint Breakpoint::ToProtocolBreakpoint() { |
33 | protocol::Breakpoint breakpoint; |
34 | |
35 | // Each breakpoint location is treated as a separate breakpoint for VS code. |
36 | // They don't have the notion of a single breakpoint with multiple locations. |
37 | if (!m_bp.IsValid()) |
38 | return breakpoint; |
39 | |
40 | breakpoint.verified = m_bp.GetNumResolvedLocations() > 0; |
41 | breakpoint.id = m_bp.GetID(); |
42 | // VS Code DAP doesn't currently allow one breakpoint to have multiple |
43 | // locations so we just report the first one. If we report all locations |
44 | // then the IDE starts showing the wrong line numbers and locations for |
45 | // other source file and line breakpoints in the same file. |
46 | |
47 | // Below we search for the first resolved location in a breakpoint and report |
48 | // this as the breakpoint location since it will have a complete location |
49 | // that is at least loaded in the current process. |
50 | lldb::SBBreakpointLocation bp_loc; |
51 | const auto num_locs = m_bp.GetNumLocations(); |
52 | for (size_t i = 0; i < num_locs; ++i) { |
53 | bp_loc = m_bp.GetLocationAtIndex(index: i); |
54 | if (bp_loc.IsResolved()) |
55 | break; |
56 | } |
57 | // If not locations are resolved, use the first location. |
58 | if (!bp_loc.IsResolved()) |
59 | bp_loc = m_bp.GetLocationAtIndex(index: 0); |
60 | auto bp_addr = bp_loc.GetAddress(); |
61 | |
62 | if (bp_addr.IsValid()) { |
63 | std::string formatted_addr = |
64 | "0x"+ llvm::utohexstr(X: bp_addr.GetLoadAddress(target: m_bp.GetTarget())); |
65 | breakpoint.instructionReference = formatted_addr; |
66 | |
67 | auto source = CreateSource(address: bp_addr, target&: m_dap.target); |
68 | if (!IsAssemblySource(source)) { |
69 | auto line_entry = bp_addr.GetLineEntry(); |
70 | const auto line = line_entry.GetLine(); |
71 | if (line != LLDB_INVALID_LINE_NUMBER) |
72 | breakpoint.line = line; |
73 | const auto column = line_entry.GetColumn(); |
74 | if (column != LLDB_INVALID_COLUMN_NUMBER) |
75 | breakpoint.column = column; |
76 | } else { |
77 | // Assembly breakpoint. |
78 | auto symbol = bp_addr.GetSymbol(); |
79 | if (symbol.IsValid()) { |
80 | breakpoint.line = |
81 | m_bp.GetTarget() |
82 | .ReadInstructions(start_addr: symbol.GetStartAddress(), end_addr: bp_addr, flavor_string: nullptr) |
83 | .GetSize() + |
84 | 1; |
85 | } |
86 | } |
87 | |
88 | breakpoint.source = std::move(source); |
89 | } |
90 | |
91 | return breakpoint; |
92 | } |
93 | |
94 | bool Breakpoint::MatchesName(const char *name) { |
95 | return m_bp.MatchesName(name); |
96 | } |
97 | |
98 | void Breakpoint::SetBreakpoint() { |
99 | lldb::SBMutex lock = m_dap.GetAPIMutex(); |
100 | std::lock_guard<lldb::SBMutex> guard(lock); |
101 | |
102 | m_bp.AddName(new_name: kDAPBreakpointLabel); |
103 | if (!m_condition.empty()) |
104 | SetCondition(); |
105 | if (!m_hit_condition.empty()) |
106 | SetHitCondition(); |
107 | } |
108 |