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gdbstub: Ensure gdbstub doesn't drop packets crucial to initialization

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This commit is contained in:
Gauvain "GovanifY" Roussel-Tarbouriech 2020-02-23 21:33:49 +01:00
parent 2a616fcc5e
commit d8bb37fc2f
3 changed files with 16 additions and 2 deletions
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2
src/core/core.cpp
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@ -306,7 +306,7 @@ System::ResultStatus System::Init(Frontend::EmuWindow& emu_window, u32 system_mo
HW::Init(*memory); HW::Init(*memory);
Service::Init(*this); Service::Init(*this);
GDBStub::Init(); GDBStub::DeferStart();
VideoCore::ResultStatus result = VideoCore::Init(emu_window, *memory); VideoCore::ResultStatus result = VideoCore::Init(emu_window, *memory);
if (result != VideoCore::ResultStatus::Success) { if (result != VideoCore::ResultStatus::Success) {

9
src/core/gdbstub/gdbstub.cpp
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@ -121,6 +121,7 @@ constexpr char target_xml[] =
)"; )";
int gdbserver_socket = -1; int gdbserver_socket = -1;
bool defer_start = false;
u8 command_buffer[GDB_BUFFER_SIZE]; u8 command_buffer[GDB_BUFFER_SIZE];
u32 command_length; u32 command_length;
@ -1042,7 +1043,8 @@ static void RemoveBreakpoint() {
} }
void HandlePacket() { void HandlePacket() {
if (!IsConnected()) { if (!IsConnected() && defer_start) {
ToggleServer(true);
return; return;
} }
@ -1133,6 +1135,10 @@ void ToggleServer(bool status) {
} }
} }
void DeferStart() {
defer_start = true;
}
static void Init(u16 port) { static void Init(u16 port) {
if (!server_enabled) { if (!server_enabled) {
// Set the halt loop to false in case the user enabled the gdbstub mid-execution. // Set the halt loop to false in case the user enabled the gdbstub mid-execution.
@ -1216,6 +1222,7 @@ void Shutdown() {
if (!server_enabled) { if (!server_enabled) {
return; return;
} }
defer_start = false;
LOG_INFO(Debug_GDBStub, "Stopping GDB ..."); LOG_INFO(Debug_GDBStub, "Stopping GDB ...");
if (gdbserver_socket != -1) { if (gdbserver_socket != -1) {

7
src/core/gdbstub/gdbstub.h
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@ -42,6 +42,13 @@ void ToggleServer(bool status);
/// Start the gdbstub server. /// Start the gdbstub server.
void Init(); void Init();
/**
* Defer initialization of the gdbstub to the first packet processing functions.
* This avoids a case where the gdbstub thread is frozen after initialization
* and fails to respond in time to packets.
*/
void DeferStart();
/// Stop gdbstub server. /// Stop gdbstub server.
void Shutdown(); void Shutdown();