1 files changed, 92 insertions, 0 deletions
diff --git a/gdb-wrapper2/gdb-wrapper2.sh b/gdb-wrapper2/gdb-wrapper2.sh
new file mode 100755
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+++ b/gdb-wrapper2/gdb-wrapper2.sh
@@ -0,0 +1,92 @@
+#!/bin/bash
+
+# gdb-wrapper2
+# Copyright (C) 2017  Paweł Redman <pawel.redman@gmail.com>
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+SELF="$0"
+PROGRAM="$1"
+shift 1
+
+if [ -z "$PROGRAM" ]; then
+        echo "$SELF [program] (args...)"
+        exit 1
+fi
+
+# Check if the program exists before calling GDB so the errors are clearer.
+if [ ! -f "$PROGRAM" ]; then
+	stat "$PROGRAM"
+	exit 1
+fi
+
+# 'catch' and 'break' can be followed by a 'commands' block to tell GDB what
+# to do in case of a breakpoint/signal. This is where the stack is printed
+# and the core is dumped. 
+function write_commands {
+	echo "commands"
+		echo "thread apply all backtrace"
+		echo "gcore"
+		echo "echo \n"
+
+		# Terminate if this isn't the first fault to avoid infinite
+		# recursion.
+		echo "set \$faults = \$faults + 1"
+		echo "if \$faults >= 2"
+			echo "echo Double fault, terminating the program.\n"
+			echo "kill"
+			echo "quit"
+		echo "else"
+			# Resume the program's execution.
+			# If the program can handle signals and exit gracefully
+			# then this script should let it (after dumping a core
+			# for debugging).
+			echo "continue"
+		echo "end"
+	echo "end"
+}
+
+function write_config {
+	# Make sure gdb won't ask for interactive input. This is supposed
+	# to never happen when using -batch but I don't trust them.
+	echo "set confirm off"
+	echo "set width unlimited"
+	echo "set height unlimited"
+	echo "set pagination off"
+	echo "set backtrace limit unlimited"
+
+	echo "set \$faults = 0"
+
+	# This catches all signals except SIGINT and SIGTRAP.
+	echo "catch signal"
+	write_commands
+
+	# Catch SIGINT too, just in case.
+	echo "catch signal SIGINT"
+	write_commands
+
+	# Catch calls to Com_Error. You'll want something else here if you're
+	# using this script for another program.
+	echo "break Com_Error"
+	write_commands
+
+	# Finally start the program.
+	echo "run"
+}
+
+# Disable automatic coredumps.
+ulimit -c 0
+
+# For some reason gdb's '-x' option won't accept a pipe as an argument. The
+# workaround is to create a temporary file for the configuration.
+config_path=$(mktemp /tmp/gdb-wrapper2.XXXXXX)
+write_config > "$config_path"
+
+gdb -batch -x "$config_path" --args "$PROGRAM" "$@"
+exit_status="$?"
+
+rm "$config_path"
+exit $exit_status