From f90a022d3a20c86399f49a8154847b73bc1b8fd3 Mon Sep 17 00:00:00 2001 From: Liam Date: Tue, 2 Jan 2024 17:12:16 -0500 Subject: kernel: fix debugger and process list lifetime --- src/core/debugger/gdbstub.cpp | 66 +++++++++++++++++++++++-------------------- 1 file changed, 35 insertions(+), 31 deletions(-) (limited to 'src/core/debugger/gdbstub.cpp') diff --git a/src/core/debugger/gdbstub.cpp b/src/core/debugger/gdbstub.cpp index 4051ed4af..80091cc7e 100644 --- a/src/core/debugger/gdbstub.cpp +++ b/src/core/debugger/gdbstub.cpp @@ -108,9 +108,9 @@ static std::string EscapeXML(std::string_view data) { return escaped; } -GDBStub::GDBStub(DebuggerBackend& backend_, Core::System& system_) - : DebuggerFrontend(backend_), system{system_} { - if (system.ApplicationProcess()->Is64Bit()) { +GDBStub::GDBStub(DebuggerBackend& backend_, Core::System& system_, Kernel::KProcess* debug_process_) + : DebuggerFrontend(backend_), system{system_}, debug_process{debug_process_} { + if (GetProcess()->Is64Bit()) { arch = std::make_unique(); } else { arch = std::make_unique(); @@ -276,7 +276,7 @@ void GDBStub::ExecuteCommand(std::string_view packet, std::vector(strtoll(command.data() + sep, nullptr, 16))}; std::vector mem(size); - if (system.ApplicationMemory().ReadBlock(addr, mem.data(), size)) { + if (GetMemory().ReadBlock(addr, mem.data(), size)) { // Restore any bytes belonging to replaced instructions. auto it = replaced_instructions.lower_bound(addr); for (; it != replaced_instructions.end() && it->first < addr + size; it++) { @@ -310,8 +310,8 @@ void GDBStub::ExecuteCommand(std::string_view packet, std::vector(strtoll(command.data() + addr_sep, nullptr, 16))}; const size_t size{static_cast(strtoll(command.data() + size_sep, nullptr, 16))}; - if (!system.ApplicationMemory().IsValidVirtualAddressRange(addr, size)) { + if (!GetMemory().IsValidVirtualAddressRange(addr, size)) { SendReply(GDB_STUB_REPLY_ERR); return; } @@ -362,22 +362,20 @@ void GDBStub::HandleBreakpointInsert(std::string_view command) { switch (type) { case BreakpointType::Software: - replaced_instructions[addr] = system.ApplicationMemory().Read32(addr); - system.ApplicationMemory().Write32(addr, arch->BreakpointInstruction()); - Core::InvalidateInstructionCacheRange(system.ApplicationProcess(), addr, sizeof(u32)); + replaced_instructions[addr] = GetMemory().Read32(addr); + GetMemory().Write32(addr, arch->BreakpointInstruction()); + Core::InvalidateInstructionCacheRange(GetProcess(), addr, sizeof(u32)); success = true; break; case BreakpointType::WriteWatch: - success = system.ApplicationProcess()->InsertWatchpoint(addr, size, - Kernel::DebugWatchpointType::Write); + success = GetProcess()->InsertWatchpoint(addr, size, Kernel::DebugWatchpointType::Write); break; case BreakpointType::ReadWatch: - success = system.ApplicationProcess()->InsertWatchpoint(addr, size, - Kernel::DebugWatchpointType::Read); + success = GetProcess()->InsertWatchpoint(addr, size, Kernel::DebugWatchpointType::Read); break; case BreakpointType::AccessWatch: - success = system.ApplicationProcess()->InsertWatchpoint( - addr, size, Kernel::DebugWatchpointType::ReadOrWrite); + success = + GetProcess()->InsertWatchpoint(addr, size, Kernel::DebugWatchpointType::ReadOrWrite); break; case BreakpointType::Hardware: default: @@ -400,7 +398,7 @@ void GDBStub::HandleBreakpointRemove(std::string_view command) { const size_t addr{static_cast(strtoll(command.data() + addr_sep, nullptr, 16))}; const size_t size{static_cast(strtoll(command.data() + size_sep, nullptr, 16))}; - if (!system.ApplicationMemory().IsValidVirtualAddressRange(addr, size)) { + if (!GetMemory().IsValidVirtualAddressRange(addr, size)) { SendReply(GDB_STUB_REPLY_ERR); return; } @@ -411,24 +409,22 @@ void GDBStub::HandleBreakpointRemove(std::string_view command) { case BreakpointType::Software: { const auto orig_insn{replaced_instructions.find(addr)}; if (orig_insn != replaced_instructions.end()) { - system.ApplicationMemory().Write32(addr, orig_insn->second); - Core::InvalidateInstructionCacheRange(system.ApplicationProcess(), addr, sizeof(u32)); + GetMemory().Write32(addr, orig_insn->second); + Core::InvalidateInstructionCacheRange(GetProcess(), addr, sizeof(u32)); replaced_instructions.erase(addr); success = true; } break; } case BreakpointType::WriteWatch: - success = system.ApplicationProcess()->RemoveWatchpoint(addr, size, - Kernel::DebugWatchpointType::Write); + success = GetProcess()->RemoveWatchpoint(addr, size, Kernel::DebugWatchpointType::Write); break; case BreakpointType::ReadWatch: - success = system.ApplicationProcess()->RemoveWatchpoint(addr, size, - Kernel::DebugWatchpointType::Read); + success = GetProcess()->RemoveWatchpoint(addr, size, Kernel::DebugWatchpointType::Read); break; case BreakpointType::AccessWatch: - success = system.ApplicationProcess()->RemoveWatchpoint( - addr, size, Kernel::DebugWatchpointType::ReadOrWrite); + success = + GetProcess()->RemoveWatchpoint(addr, size, Kernel::DebugWatchpointType::ReadOrWrite); break; case BreakpointType::Hardware: default: @@ -466,10 +462,10 @@ void GDBStub::HandleQuery(std::string_view command) { const auto target_xml{arch->GetTargetXML()}; SendReply(PaginateBuffer(target_xml, command.substr(30))); } else if (command.starts_with("Offsets")) { - const auto main_offset = Core::FindMainModuleEntrypoint(system.ApplicationProcess()); + const auto main_offset = Core::FindMainModuleEntrypoint(GetProcess()); SendReply(fmt::format("TextSeg={:x}", GetInteger(main_offset))); } else if (command.starts_with("Xfer:libraries:read::")) { - auto modules = Core::FindModules(system.ApplicationProcess()); + auto modules = Core::FindModules(GetProcess()); std::string buffer; buffer += R"()"; @@ -483,7 +479,7 @@ void GDBStub::HandleQuery(std::string_view command) { SendReply(PaginateBuffer(buffer, command.substr(21))); } else if (command.starts_with("fThreadInfo")) { // beginning of list - const auto& threads = system.ApplicationProcess()->GetThreadList(); + const auto& threads = GetProcess()->GetThreadList(); std::vector thread_ids; for (const auto& thread : threads) { thread_ids.push_back(fmt::format("{:x}", thread.GetThreadId())); @@ -497,7 +493,7 @@ void GDBStub::HandleQuery(std::string_view command) { buffer += R"()"; buffer += ""; - const auto& threads = system.ApplicationProcess()->GetThreadList(); + const auto& threads = GetProcess()->GetThreadList(); for (const auto& thread : threads) { auto thread_name{Core::GetThreadName(&thread)}; if (!thread_name) { @@ -613,7 +609,7 @@ void GDBStub::HandleRcmd(const std::vector& command) { std::string_view command_str{reinterpret_cast(&command[0]), command.size()}; std::string reply; - auto* process = system.ApplicationProcess(); + auto* process = GetProcess(); auto& page_table = process->GetPageTable(); const char* commands = "Commands:\n" @@ -714,7 +710,7 @@ void GDBStub::HandleRcmd(const std::vector& command) { } Kernel::KThread* GDBStub::GetThreadByID(u64 thread_id) { - auto& threads{system.ApplicationProcess()->GetThreadList()}; + auto& threads{GetProcess()->GetThreadList()}; for (auto& thread : threads) { if (thread.GetThreadId() == thread_id) { return std::addressof(thread); @@ -783,4 +779,12 @@ void GDBStub::SendStatus(char status) { backend.WriteToClient(buf); } +Kernel::KProcess* GDBStub::GetProcess() { + return debug_process; +} + +Core::Memory::Memory& GDBStub::GetMemory() { + return GetProcess()->GetMemory(); +} + } // namespace Core -- cgit v1.2.3