![]() ![]() Request: Strace receives syscall and continues running via gdbserver.State: GDB client is waiting, strace client is active.Request: GDB client makes the next request over a syscall.State: GDB client is active, strace client is waiting. ![]() Client packet requests (continue, step, get memory, etc.) and the current client state (active or waiter) determine the client's next state. Making gdbserver multiple client-aware requires adding state information for both the gdb client and the strace client-for example, the file descriptor for the connection and state information regarding the packets sent over the connection.Īs is the case with time-sharing, one client will always be the active client. Gdbserver currently keeps state information for a single client. Gdbserver interacts with the gdb client while the strace client waits.Strace continues running via gdbserver.Gdbserver sends a syscall packet to strace.To do this, gdbserver must alternate between: To support both a gdb and strace client, it is necessary to enable gdbserver to handle multiple client connections. Gdbserver currently handles a single client connection. +++ exited with 0 +++ Extending gdbserver to support both a gdb and an strace client That information was specified by gdbserver, and strace will inherit that test program connection:Īrch_prctl(0x3001 /* ARCH_? */, 0x7fffffffdb40) = -1 EINVAL (Invalid argument) Note that we give neither a -p PID option nor a test program option. ![]() Second, start the strace client and communicate with gdbserver on the remote host using the TCP port given in the gdbserver command:
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