[RFC][PATCH 04/15] Fix crash in tstatus after detach

[henrik.wallin@windriver.com]

From: Par Olsson <par.olsson@windriver.com>

When calling tstatus after detaching the process,
gdbserver tries to access inferior memory which
results in a crash.
This changes the behavior of the agent_loaded_p()
to return false if no inferior is loaded.

gdb/ChangeLog:

	* agent.c (agent_loaded_p): Add check that inferior is present.

Signed-off-by: Par Olsson <par.olsson@windriver.com>
Signed-off-by: Henrik Wallin <henrik.wallin@windriver.com>
---
 gdb/common/agent.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gdb/common/agent.c b/gdb/common/agent.c
index 5c307290589d..c9b6c41bc4ff 100644
--- a/gdb/common/agent.c
+++ b/gdb/common/agent.c
@@ -73,9 +73,16 @@ static struct ipa_sym_addresses ipa_sym_addrs;
 
 static int all_agent_symbols_looked_up = 0;
 
+#ifdef GDBSERVER
+#include <inferiors.h>
+#endif
 int
 agent_loaded_p (void)
 {
+#ifdef GDBSERVER
+  if (current_thread == NULL)
+    return 0;
+#endif
   return all_agent_symbols_looked_up;
 }
 
-- 
2.1.4