mgorny created this revision.
mgorny added reviewers: krytarowski, emaste, labath, jasonmolenda, JDevlieghere.
mgorny requested review of this revision.
Add support for the original gdbserver signal mapping when communicating
with GDB. If qSupported indicates that we are talking to LLDB (via
'native-signals+'), the previous behavior of using native host signals
is preserved.
TODO: add all gdb signals, add tests
https://reviews.llvm.org/D108078
Files:
lldb/source/Plugins/Process/Utility/GDBRemoteSignals.cpp
lldb/source/Plugins/Process/Utility/GDBRemoteSignals.h
lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h
lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp
lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
Index: lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
===================================================================
--- lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -720,11 +720,15 @@
GetTarget().GetArchitecture().GetTriple().getTriple().c_str());
if (error.Success()) {
- PlatformSP platform_sp = GetTarget().GetPlatform();
- if (platform_sp && platform_sp->IsConnected())
- SetUnixSignals(platform_sp->GetUnixSignals());
- else
- SetUnixSignals(UnixSignals::Create(GetTarget().GetArchitecture()));
+ if (!m_gdb_comm.UsesNativeSignals()) {
+ Process::SetUnixSignals(std::make_shared<GDBRemoteSignals>());
+ } else {
+ PlatformSP platform_sp = GetTarget().GetPlatform();
+ if (platform_sp && platform_sp->IsConnected())
+ SetUnixSignals(platform_sp->GetUnixSignals());
+ else
+ SetUnixSignals(UnixSignals::Create(GetTarget().GetArchitecture()));
+ }
}
return error;
Index: lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp
===================================================================
--- lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp
+++ lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp
@@ -1341,5 +1341,6 @@
llvm::formatv("PacketSize={0}", max_packet_size),
"QStartNoAckMode+",
"qEcho+",
+ "native-signals+",
};
}
Index: lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h
===================================================================
--- lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h
+++ lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h
@@ -469,6 +469,8 @@
bool GetMemoryTaggingSupported();
+ bool UsesNativeSignals();
+
lldb::DataBufferSP ReadMemoryTags(lldb::addr_t addr, size_t len,
int32_t type);
@@ -589,6 +591,7 @@
LazyBool m_supports_error_string_reply = eLazyBoolCalculate;
LazyBool m_supports_multiprocess = eLazyBoolCalculate;
LazyBool m_supports_memory_tagging = eLazyBoolCalculate;
+ LazyBool m_uses_native_signals = eLazyBoolCalculate;
bool m_supports_qProcessInfoPID : 1, m_supports_qfProcessInfo : 1,
m_supports_qUserName : 1, m_supports_qGroupName : 1,
Index: lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
===================================================================
--- lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
+++ lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
@@ -265,6 +265,7 @@
m_supports_qXfer_features_read = eLazyBoolCalculate;
m_supports_qXfer_memory_map_read = eLazyBoolCalculate;
m_supports_augmented_libraries_svr4_read = eLazyBoolCalculate;
+ m_uses_native_signals = eLazyBoolCalculate;
m_supports_qProcessInfoPID = true;
m_supports_qfProcessInfo = true;
m_supports_qUserName = true;
@@ -314,6 +315,7 @@
m_supports_qEcho = eLazyBoolNo;
m_supports_QPassSignals = eLazyBoolNo;
m_supports_memory_tagging = eLazyBoolNo;
+ m_uses_native_signals = eLazyBoolNo;
m_max_packet_size = UINT64_MAX; // It's supposed to always be there, but if
// not, we assume no limit
@@ -360,6 +362,8 @@
m_supports_multiprocess = eLazyBoolYes;
else if (x == "memory-tagging+")
m_supports_memory_tagging = eLazyBoolYes;
+ else if (x == "native-signals+")
+ m_uses_native_signals = eLazyBoolYes;
// Look for a list of compressions in the features list e.g.
// qXfer:features:read+;PacketSize=20000;qEcho+;SupportedCompressions=zlib-
// deflate,lzma
@@ -4298,3 +4302,10 @@
GDBRemoteClientBase::OnRunPacketSent(first);
m_curr_tid = LLDB_INVALID_THREAD_ID;
}
+
+bool GDBRemoteCommunicationClient::UsesNativeSignals() {
+ if (m_uses_native_signals == eLazyBoolCalculate) {
+ GetRemoteQSupported();
+ }
+ return m_uses_native_signals == eLazyBoolYes;
+}
Index: lldb/source/Plugins/Process/Utility/GDBRemoteSignals.h
===================================================================
--- lldb/source/Plugins/Process/Utility/GDBRemoteSignals.h
+++ lldb/source/Plugins/Process/Utility/GDBRemoteSignals.h
@@ -13,7 +13,8 @@
namespace lldb_private {
-/// Empty set of Unix signals to be filled by PlatformRemoteGDBServer
+/// Initially carries signals defined by the GDB Remote Serial Protocol.
+/// Can be filled with platform's signals through PlatformRemoteGDBServer.
class GDBRemoteSignals : public UnixSignals {
public:
GDBRemoteSignals();
Index: lldb/source/Plugins/Process/Utility/GDBRemoteSignals.cpp
===================================================================
--- lldb/source/Plugins/Process/Utility/GDBRemoteSignals.cpp
+++ lldb/source/Plugins/Process/Utility/GDBRemoteSignals.cpp
@@ -15,4 +15,76 @@
GDBRemoteSignals::GDBRemoteSignals(const lldb::UnixSignalsSP &rhs)
: UnixSignals(*rhs) {}
-void GDBRemoteSignals::Reset() { m_signals.clear(); }
+void GDBRemoteSignals::Reset() {
+ m_signals.clear();
+ // clang-format off
+ // SIGNO NAME SUPPRESS STOP NOTIFY DESCRIPTION
+ // ====== ============== ======== ====== ====== ===================================================
+ AddSignal(1, "SIGHUP", false, true, true, "hangup");
+ AddSignal(2, "SIGINT", true, true, true, "interrupt");
+ AddSignal(3, "SIGQUIT", false, true, true, "quit");
+ AddSignal(4, "SIGILL", false, true, true, "illegal instruction");
+ AddSignal(5, "SIGTRAP", true, true, true, "trace trap (not reset when caught)");
+ AddSignal(6, "SIGABRT", false, true, true, "abort()/IOT trap", "SIGIOT");
+ AddSignal(7, "SIGEMT", false, true, true, "emulation trap");
+ AddSignal(8, "SIGFPE", false, true, true, "floating point exception");
+ AddSignal(9, "SIGKILL", false, true, true, "kill");
+ AddSignal(10, "SIGBUS", false, true, true, "bus error");
+ AddSignal(11, "SIGSEGV", false, true, true, "segmentation violation");
+ AddSignal(12, "SIGSYS", false, true, true, "invalid system call");
+ AddSignal(13, "SIGPIPE", false, true, true, "write to pipe with reading end closed");
+ AddSignal(14, "SIGALRM", false, false, false, "alarm");
+ AddSignal(15, "SIGTERM", false, true, true, "termination requested");
+ AddSignal(16, "SIGURG", false, true, true, "urgent data on socket");
+ AddSignal(17, "SIGSTOP", true, true, true, "process stop");
+ AddSignal(18, "SIGTSTP", false, true, true, "tty stop");
+ AddSignal(19, "SIGCONT", false, false, true, "process continue");
+ AddSignal(20, "SIGCHLD", false, false, true, "child status has changed", "SIGCLD");
+ AddSignal(21, "SIGTTIN", false, true, true, "background tty read");
+ AddSignal(22, "SIGTTOU", false, true, true, "background tty write");
+ AddSignal(23, "SIGIO", false, true, true, "input/output ready/Pollable event", "SIGPOLL");
+ AddSignal(24, "SIGXCPU", false, true, true, "CPU resource exceeded");
+ AddSignal(25, "SIGXFSZ", false, true, true, "file size limit exceeded");
+ AddSignal(26, "SIGVTALRM", false, true, true, "virtual time alarm");
+ AddSignal(27, "SIGPROF", false, false, false, "profiling time alarm");
+ AddSignal(28, "SIGWINCH", false, true, true, "window size changes");
+ AddSignal(29, "SIGLOST", false, true, true, "resource lost");
+ AddSignal(30, "SIGUSR1", false, true, true, "user defined signal 1");
+ AddSignal(31, "SIGUSR2", false, true, true, "user defined signal 2");
+ AddSignal(32, "SIGPWR", false, true, true, "power failure");
+ //
+#if 0
+ AddSignal(34, "SIGRTMIN", false, false, false, "real time signal 0");
+ AddSignal(35, "SIGRTMIN+1", false, false, false, "real time signal 1");
+ AddSignal(36, "SIGRTMIN+2", false, false, false, "real time signal 2");
+ AddSignal(37, "SIGRTMIN+3", false, false, false, "real time signal 3");
+ AddSignal(38, "SIGRTMIN+4", false, false, false, "real time signal 4");
+ AddSignal(39, "SIGRTMIN+5", false, false, false, "real time signal 5");
+ AddSignal(40, "SIGRTMIN+6", false, false, false, "real time signal 6");
+ AddSignal(41, "SIGRTMIN+7", false, false, false, "real time signal 7");
+ AddSignal(42, "SIGRTMIN+8", false, false, false, "real time signal 8");
+ AddSignal(43, "SIGRTMIN+9", false, false, false, "real time signal 9");
+ AddSignal(44, "SIGRTMIN+10", false, false, false, "real time signal 10");
+ AddSignal(45, "SIGRTMIN+11", false, false, false, "real time signal 11");
+ AddSignal(46, "SIGRTMIN+12", false, false, false, "real time signal 12");
+ AddSignal(47, "SIGRTMIN+13", false, false, false, "real time signal 13");
+ AddSignal(48, "SIGRTMIN+14", false, false, false, "real time signal 14");
+ AddSignal(49, "SIGRTMIN+15", false, false, false, "real time signal 15");
+ AddSignal(50, "SIGRTMAX-14", false, false, false, "real time signal 16"); // switching to SIGRTMAX-xxx to match "kill -l" output
+ AddSignal(51, "SIGRTMAX-13", false, false, false, "real time signal 17");
+ AddSignal(52, "SIGRTMAX-12", false, false, false, "real time signal 18");
+ AddSignal(53, "SIGRTMAX-11", false, false, false, "real time signal 19");
+ AddSignal(54, "SIGRTMAX-10", false, false, false, "real time signal 20");
+ AddSignal(55, "SIGRTMAX-9", false, false, false, "real time signal 21");
+ AddSignal(56, "SIGRTMAX-8", false, false, false, "real time signal 22");
+ AddSignal(57, "SIGRTMAX-7", false, false, false, "real time signal 23");
+ AddSignal(58, "SIGRTMAX-6", false, false, false, "real time signal 24");
+ AddSignal(59, "SIGRTMAX-5", false, false, false, "real time signal 25");
+ AddSignal(60, "SIGRTMAX-4", false, false, false, "real time signal 26");
+ AddSignal(61, "SIGRTMAX-3", false, false, false, "real time signal 27");
+ AddSignal(62, "SIGRTMAX-2", false, false, false, "real time signal 28");
+ AddSignal(63, "SIGRTMAX-1", false, false, false, "real time signal 29");
+ AddSignal(64, "SIGRTMAX", false, false, false, "real time signal 30");
+#endif
+ // clang-format on
+}
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