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/** @addtogroup sctrace

 * @{

 */

/** @file

 */

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <syscall.h>

#include <ipc/ipc.h>

#include <fibril.h>

#include <errno.h>

#include <udebug.h>

#include <async.h>

// Temporary: service and method names

#include "proto.h"

#include <ipc/services.h>

#include "../../srv/vfs/vfs.h"

#include "syscalls.h"

#include "ipcp.h"

#include "errors.h"

#include "debug_api.h"

#define THBUF_SIZE 64

unsigned thread_hash_buf[THBUF_SIZE];

unsigned n_threads;

int next_thread_id;

int phoneid;

int abort_trace;

void thread_trace_start(unsigned thread_hash);

int task_connect(int taskid)

{

    int rc;

    printf("ipc_connect_task(%d)...\n", taskid);

    rc = ipc_connect_kbox(taskid);

    printf("-> %d\n", rc);

    phoneid = rc;

    if (rc < 0) return rc;

    printf("debug_begin()\n");

    rc = debug_begin(phoneid);

    printf("-> %d\n", rc);

    if (rc < 0) return rc;

    return 0;

}

int get_thread_list(void)

{

    int rc;

    int tb_copied;

    int tb_needed;

    int i;

    printf("send IPC_M_DEBUG_THREAD_READ message\n");

    rc = debug_thread_read(phoneid, (unsigned)thread_hash_buf,

        THBUF_SIZE*sizeof(unsigned), &tb_copied, &tb_needed);

    printf("-> %d\n", rc);

    if (rc < 0) return rc;

    n_threads = tb_copied / sizeof(unsigned);

    printf("thread IDs:");

    for (i=0; i<n_threads; i++) {

        printf(" %u", thread_hash_buf[i]);

    }

    printf("\ntotal of %u threads\n", tb_needed/sizeof(unsigned));

    return 0;

}

void print_sc_retval(int retval, rv_type_t rv_type)

{

    printf (" -> ");

    if (rv_type == RV_INTEGER) {

        printf("%d", retval);

    } else if (rv_type == RV_HASH) {

        printf("0x%08x", retval);

    } else if (rv_type == RV_ERRNO) {

        if (retval >= -15 && retval <= 0) {

            printf("%d %s (%s)", retval,

                err_desc[retval].name,

                err_desc[retval].desc);

        } else {

            printf("%d", retval);

        }

    } else if (rv_type == RV_INT_ERRNO) {

        if (retval >= -15 && retval < 0) {

            printf("%d %s (%s)", retval,

                err_desc[retval].name,

                err_desc[retval].desc);

        } else {

            printf("%d", retval);

        }

    }

    putchar('\n');

}

void print_sc_args(unsigned *sc_args, int n)

{

    int i;

    putchar('(');

    if (n > 0) printf("%d", sc_args[0]);

    for (i=1; i<n; i++) {

        printf(", %d", sc_args[i]);

    }

    putchar(')');

}

void sc_ipc_call_async_fast(unsigned *sc_args, int sc_rc)

{

    ipc_call_t call;

    int phoneid;

    if (sc_rc == IPC_CALLRET_FATAL || sc_rc == IPC_CALLRET_TEMPORARY)

        return;

    phoneid = sc_args[0];

    IPC_SET_METHOD(call, sc_args[1]);

    IPC_SET_ARG1(call, sc_args[2]);

    IPC_SET_ARG2(call, sc_args[3]);

    IPC_SET_ARG3(call, sc_args[4]);

    IPC_SET_ARG4(call, sc_args[5]);

    IPC_SET_ARG5(call, 0);

    ipcp_call_out(phoneid, &call, sc_rc);

}

void sc_ipc_call_async_slow(unsigned *sc_args, int sc_rc)

{

    ipc_call_t call;

    int rc;

    if (sc_rc == IPC_CALLRET_FATAL || sc_rc == IPC_CALLRET_TEMPORARY)

        return;

    memset(&call, 0, sizeof(call));

    rc = debug_mem_read(phoneid, &call.args, sc_args[1], sizeof(call.args));

    if (rc >= 0) {

        ipcp_call_out(sc_args[0], &call, sc_rc);

    }

}

void sc_ipc_call_sync_fast(unsigned *sc_args)

{

    ipc_call_t question, reply;

    int rc;

    int phoneidx;

//  printf("sc_ipc_call_sync_fast()\n");

    phoneidx = sc_args[0];

    IPC_SET_METHOD(question, sc_args[1]);

    IPC_SET_ARG1(question, sc_args[2]);

    IPC_SET_ARG2(question, sc_args[3]);

    IPC_SET_ARG3(question, sc_args[4]);

    IPC_SET_ARG4(question, 0);

    IPC_SET_ARG5(question, 0);

//  printf("memset\n");

    memset(&reply, 0, sizeof(reply));

//  printf("debug_mem_read(phone=%d, buffer_ptr=%u, src_addr=%d, n=%d\n",

//      phoneid, &reply.args, sc_args[5], sizeof(reply.args));

    rc = debug_mem_read(phoneid, &reply.args, sc_args[5], sizeof(reply.args));

//  printf("dmr->%d\n", rc);

    if (rc < 0) return;

//  printf("call ipc_call_sync\n");

    ipcp_call_sync(phoneidx, &question, &reply);

}

void sc_ipc_call_sync_slow(unsigned *sc_args)

{

    ipc_call_t question, reply;

    int rc;

    memset(&question, 0, sizeof(question));

    rc = debug_mem_read(phoneid, &question.args, sc_args[1], sizeof(question.args));

    printf("dmr->%d\n", rc);

    if (rc < 0) return;

    memset(&reply, 0, sizeof(reply));

    rc = debug_mem_read(phoneid, &reply.args, sc_args[2], sizeof(reply.args));

    printf("dmr->%d\n", rc);

    if (rc < 0) return;

    ipcp_call_sync(sc_args[0], &question, &reply);

}

void sc_ipc_wait(unsigned *sc_args, int sc_rc)

{

    ipc_call_t call;

    int rc;

    if (sc_rc == 0) return 0;

    memset(&call, 0, sizeof(call));

    rc = debug_mem_read(phoneid, &call, sc_args[0], sizeof(call));

//  printf("debug_mem_read(phone %d, dest %d, app-mem src %d, size %d -> %d\n",

//      phoneid, (int)&call, sc_args[0], sizeof(call), rc);

    if (rc >= 0) {

        ipcp_call_in(&call, sc_rc);

    }

}

void event_syscall(unsigned thread_id, unsigned thread_hash,  unsigned sc_id, int sc_rc)

{

    unsigned sc_args[6];

    int rv_type;

    int rc;

    /* Read syscall arguments */

    rc = debug_args_read(phoneid, thread_hash, sc_args);

    async_serialize_start();

//  printf("[%d] ", thread_id);

    if (rc < 0) {

        printf("error\n");

        async_serialize_end();

        return;

    }

    /* Print syscall name, id and arguments */

    printf("%s", syscall_desc[sc_id].name);

    print_sc_args(sc_args, syscall_desc[sc_id].n_args);

    rv_type = syscall_desc[sc_id].rv_type;

    print_sc_retval(sc_rc, rv_type);

    switch (sc_id) {

    case SYS_IPC_CALL_ASYNC_FAST:

        sc_ipc_call_async_fast(sc_args, sc_rc);

        break;

    case SYS_IPC_CALL_ASYNC_SLOW:

        sc_ipc_call_async_slow(sc_args, sc_rc);

        break;

    case SYS_IPC_CALL_SYNC_FAST:

        sc_ipc_call_sync_fast(sc_args);

        break;

    case SYS_IPC_CALL_SYNC_SLOW:

        sc_ipc_call_sync_slow(sc_args);

        break;

    case SYS_IPC_WAIT:

        sc_ipc_wait(sc_args, sc_rc);

        break;

    default:

        break;

    }

    async_serialize_end();

}

void event_new_thread(unsigned hash)

{

    async_serialize_start();

    printf("new thread, hash 0x%x\n", hash);

    async_serialize_end();

    thread_trace_start(hash);

}

void trace_loop(void *thread_hash_arg)

{

    int rc;

    unsigned ev_type;

    unsigned thread_hash;

    unsigned thread_id;

    unsigned val0, val1;

    thread_hash = (unsigned)thread_hash_arg;

    thread_id = next_thread_id++;

    printf("trace_loop(%d)\n", thread_id); 

    while (!abort_trace) {

        /* Run thread until an event occurs */

        rc = debug_go(phoneid, thread_hash,

            &ev_type, &val0, &val1);

//      printf("rc = %d, ev_type=%d\n", rc, ev_type);

        if (ev_type == UDEBUG_EVENT_FINISHED) {

            printf("thread %u debugging finished\n", thread_id);

            break;

        }

        if (rc >= 0) {

            switch (ev_type) {

            case UDEBUG_EVENT_SYSCALL:

                event_syscall(thread_id, thread_hash, val0, (int)val1);

                break;

            case UDEBUG_EVENT_NEW_THREAD:

                event_new_thread(val0);

                break;

            default:

                printf("unknown event type %d\n", ev_type);

                break;

            }

        }

    }

    printf("trace_loop(%d) exiting\n", thread_id);

}

void thread_trace_start(unsigned thread_hash)

{

    fid_t fid;

    fid = fibril_create(trace_loop, (void *)thread_hash);

    if (fid == 0) {

        printf("Warning: Failed creating fibril\n");

    }

    fibril_add_ready(fid);

}

void trace_active_task(void)

{

    int taskid;

    int i;

    int rc;

    printf("Syscall Tracer\n");

    printf("Press 'c' to connect\n");

    while ((i = getchar()) != 'c')

        putchar(i);

    taskid = 14;

    rc = task_connect(taskid);

    if (rc < 0) {

        printf("Failed to connect to task %d\n", taskid);

        return;

    }

    printf("Connected to task %d\n", taskid);

    ipcp_init();

    rc = get_thread_list();

    if (rc < 0) {

        printf("Failed to get thread list (error %d)\n", rc);

        return;

    }

    abort_trace = 0;

    for (i = 0; i < n_threads; i++) {

        thread_trace_start(thread_hash_buf[i]);

    }

    getchar();

    printf("terminate debugging session...\n");

    abort_trace = 1;

    debug_end(phoneid);

    ipc_hangup(phoneid);

    ipcp_cleanup();

    printf("done\n");

    return;

}

static void main_init(void)

{

    proto_t *p;

    oper_t *o;

    next_thread_id = 1;

    proto_init();

    o = malloc(sizeof(oper_t));

    o->name = "mount";

    p = proto_new("vfs");

    proto_add_oper(p, VFS_MOUNT, o);

    proto_register(SERVICE_VFS, p);

}

int main(void)

{

    main_init();

    while (1) {

        trace_active_task();

    }

}

/** @}

 */