Initial Contribution

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);
+}