Subversion Repositories HelenOS

/** @addtogroup sctrace

 * @{

 */

/** @file

 */

#include <stdio.h>

#include <unistd.h>

#include <syscall.h>

#include <ipc/ipc.h>

#include <fibril.h>

#include <errno.h>

#include <udebug.h>

#include <async.h>

#include "syscalls.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_slow(unsigned *sc_args)

{

    unsigned ipc_args[6];

    int rc;

    memset(ipc_args, 0, sizeof(ipc_args));

    rc = debug_mem_read(phoneid, ipc_args, sc_args[1], sizeof(ipc_args));

    if (rc >= 0) {

        printf("args: (%u, %u, %u, %u, %u, %u)\n",

            ipc_args[0], ipc_args[1], ipc_args[2],

            ipc_args[3], ipc_args[4], ipc_args[5]);

    }

}

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_SLOW:

        sc_ipc_call_async_slow(sc_args);

        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);

    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);

    printf("done\n");

    return;

}

int main(void)

{

    next_thread_id = 1;

    while (1) {

        trace_active_task();

    }

}

/** @}

 */