Initial Contribution
diff --git a/linker/debugger.c b/linker/debugger.c
new file mode 100644
index 0000000..68997c5
--- /dev/null
+++ b/linker/debugger.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <signal.h>
+#include <sys/mman.h>
+
+#include "linker.h"
+
+#include <sys/socket.h>
+#include <cutils/sockets.h>
+
+void notify_gdb_of_libraries();
+
+void debugger_signal_handler(int n)
+{
+ unsigned tid;
+ int s;
+
+ /* avoid picking up GC interrupts */
+ signal(SIGUSR1, SIG_IGN);
+
+ tid = gettid();
+ s = socket_local_client("android:debuggerd",
+ ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM);
+
+ if(s >= 0) {
+ /* debugger knows our pid from the credentials on the
+ ** local socket but we need to tell it our tid. It
+ ** is paranoid and will verify that we are giving a tid
+ ** that's actually in our process
+ */
+ write(s, &tid, sizeof(unsigned));
+
+ read(s, &tid, 1);
+ notify_gdb_of_libraries();
+ close(s);
+ }
+
+ /* remove our net so we fault for real when we return */
+ signal(n, SIG_IGN);
+}
+
+void debugger_init()
+{
+ signal(SIGILL, debugger_signal_handler);
+ signal(SIGABRT, debugger_signal_handler);
+ signal(SIGBUS, debugger_signal_handler);
+ signal(SIGFPE, debugger_signal_handler);
+ signal(SIGSEGV, debugger_signal_handler);
+ signal(SIGSTKFLT, debugger_signal_handler);
+}