linux: initial support for 'real' signal handling

This patch upgrades the Linux process plugin to handle a larger range of signal
events.  For example, we can detect when the inferior has "crashed" and why,
interrupt a running process, deliver an arbitrary signal, and so on.

llvm-svn: 128547

1 files changed, 67 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/Linux/LinuxSignals.cpp b/lldb/source/Plugins/Process/Linux/LinuxSignals.cpp
new file mode 100644
index 00000000000..0a6c34cfbc6
--- /dev/null
+++ b/lldb/source/Plugins/Process/Linux/LinuxSignals.cpp
@@ -0,0 +1,67 @@
+//===-- LinuxSignals.cpp ----------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// C Includes
+#include <signal.h>
+
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "LinuxSignals.h"
+
+LinuxSignals::LinuxSignals()
+    : UnixSignals()
+{
+    Reset();
+}
+
+void
+LinuxSignals::Reset()
+{
+    m_signals.clear();
+
+#define ADDSIGNAL(S, SUPPRESS, STOP, NOTIFY, DESCRIPTION) \
+    AddSignal(SIG ## S, "SIG" #S, #S, SUPPRESS, STOP, NOTIFY, DESCRIPTION)
+
+    ADDSIGNAL(HUP,    false,  true,  true, "hangup");
+    ADDSIGNAL(INT,    true,   true,  true, "interrupt");
+    ADDSIGNAL(QUIT,   false,  true,  true, "quit");
+    ADDSIGNAL(ILL,    false,  true,  true, "illegal instruction");
+    ADDSIGNAL(TRAP,   true,   true,  true, "trace trap (not reset when caught)");
+    ADDSIGNAL(ABRT,   false,  true,  true, "abort");
+    ADDSIGNAL(IOT,    false,  true,  true, "abort");
+    ADDSIGNAL(BUS,    false,  true,  true, "bus error");
+    ADDSIGNAL(FPE,    false,  true,  true, "floating point exception");
+    ADDSIGNAL(KILL,   false,  true,  true, "kill");
+    ADDSIGNAL(USR1,   false,  true,  true, "user defined signal 1");
+    ADDSIGNAL(SEGV,   false,  true,  true, "segmentation violation");
+    ADDSIGNAL(USR2,   false,  true,  true, "user defined signal 2");
+    ADDSIGNAL(PIPE,   false,  true,  true, "write to pipe with reading end closed");
+    ADDSIGNAL(ALRM,   false,  false, true, "alarm");
+    ADDSIGNAL(TERM,   false,  true,  true, "termination requested");
+    ADDSIGNAL(STKFLT, false,  true,  true, "stack fault");
+    ADDSIGNAL(CHLD,   false,  false, true, "child process exit");
+    ADDSIGNAL(CONT,   false,  true,  true, "process continue");
+    ADDSIGNAL(STOP,   false,  true,  true, "process stop");
+    ADDSIGNAL(TSTP,   false,  true,  true, "tty stop");
+    ADDSIGNAL(TTIN,   false,  true,  true, "background tty read");
+    ADDSIGNAL(TTOU,   false,  true,  true, "background tty write");
+    ADDSIGNAL(URG,    false,  true,  true, "urgent data on socket");
+    ADDSIGNAL(XCPU,   false,  true,  true, "CPU resource exceeded");
+    ADDSIGNAL(XFSZ,   false,  true,  true, "file size limit exceeded");
+    ADDSIGNAL(VTALRM, false,  true,  true, "virtual alarm");
+    ADDSIGNAL(PROF,   false,  true,  true, "profiling alarm");
+    ADDSIGNAL(WINCH,  false,  true,  true, "window size change");
+    ADDSIGNAL(POLL,   false,  true,  true, "pollable event");
+    ADDSIGNAL(IO,     false,  true,  true, "input/output ready");
+    ADDSIGNAL(PWR,    false,  true,  true, "power failure");
+    ADDSIGNAL(SYS,    false,  true,  true, "invalid system call");
+
+#undef ADDSIGNAL
+}