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/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file
* @brief Host utility functions
*/
#include <vppinfra/format.h>
#include <vlib/vlib.h>
#include <vlib/threads.h>
#include <vnet/vnet.h>
#include <vppinfra/format.h>
/**
* @brief GDB callable function: vl - Return vector length of vector
*
* @param *p - void - address of vector
*
* @return length - u32
*
*/
u32 vl(void *p)
{
return vec_len (p);
}
/**
* @brief GDB callable function: pe - call pool_elts - number of elements in a pool
*
* @param *v - void - address of pool
*
* @return number - uword
*
*/
uword pe (void *v)
{
return (pool_elts(v));
}
/**
* @brief GDB callable function: pifi - call pool_is_free_index - is passed index free?
*
* @param *p - void - address of pool
* @param *index - u32
*
* @return 0|1 - int
*
*/
int pifi (void *p, u32 index)
{
return pool_is_free_index (p, index);
}
/**
* @brief GDB callable function: debug_hex_bytes - return formatted hex string
*
* @param *s - u8
* @param n - u32 - number of bytes to format
*
*/
void debug_hex_bytes (u8 *s, u32 n)
{
fformat (stderr, "%U\n", format_hex_bytes, s, n);
}
/**
* @brief GDB callable function: vlib_dump_frame_ownership
*
*/
void vlib_dump_frame_ownership (void)
{
vlib_main_t * vm = vlib_get_main();
vlib_node_main_t * nm = &vm->node_main;
vlib_node_runtime_t * this_node_runtime;
vlib_next_frame_t * nf;
u32 first_nf_index;
u32 index;
vec_foreach(this_node_runtime, nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
{
first_nf_index = this_node_runtime->next_frame_index;
for (index = first_nf_index; index < first_nf_index +
this_node_runtime->n_next_nodes; index++)
{
vlib_node_runtime_t * owned_runtime;
nf = vec_elt_at_index (vm->node_main.next_frames, index);
if (nf->flags & VLIB_FRAME_OWNER)
{
owned_runtime = vec_elt_at_index (nm->nodes_by_type[0],
nf->node_runtime_index);
fformat(stderr,
"%s next index %d owns enqueue rights to %s\n",
nm->nodes[this_node_runtime->node_index]->name,
index - first_nf_index,
nm->nodes[owned_runtime->node_index]->name);
fformat (stderr, " nf index %d nf->frame_index %d\n",
nf - vm->node_main.next_frames,
nf->frame_index);
}
}
}
}
/**
* @brief GDB callable function: vlib_runtime_index_to_node_name
*
* Takes node index and will return the node name.
*
* @param index - u32
*/
void vlib_runtime_index_to_node_name (u32 index)
{
vlib_main_t * vm = vlib_get_main();
vlib_node_main_t * nm = &vm->node_main;
if (index > vec_len (nm->nodes))
{
fformat(stderr, "%d out of range, max %d\n", vec_len(nm->nodes));
return;
}
fformat(stderr, "node runtime index %d name %s\n", index, nm->nodes[index]->name);
}
void gdb_show_errors (int verbose)
{
extern vlib_cli_command_t vlib_cli_show_errors;
unformat_input_t input;
vlib_main_t * vm = vlib_get_main();
if (verbose == 0)
unformat_init_string (&input, "verbose 0", 9);
else if (verbose == 1)
unformat_init_string (&input, "verbose 1", 9);
else
{
fformat(stderr, "verbose not 0 or 1\n");
return;
}
vlib_cli_show_errors.function (vm, &input, 0 /* cmd */);
unformat_free (&input);
}
void gdb_show_session (int verbose)
{
extern vlib_cli_command_t vlib_cli_show_session_command;
unformat_input_t input;
vlib_main_t * vm = vlib_get_main();
if (verbose == 0)
unformat_init_string (&input, "verbose 0", 9);
else if (verbose == 1)
unformat_init_string (&input, "verbose 1", 9);
else if (verbose == 2)
unformat_init_string (&input, "verbose 2", 9);
else
{
fformat(stderr, "verbose not 0 - 2\n");
return;
}
vlib_cli_show_session_command.function (vm, &input, 0 /* cmd */);
unformat_free (&input);
}
/**
* @brief GDB callable function: show_gdb_command_fn - show gdb
*
* Shows list of functions for VPP available in GDB
*
* @return error - clib_error_t
*/
static clib_error_t *
show_gdb_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
vlib_cli_output (vm, "vl(p) returns vec_len(p)");
vlib_cli_output (vm, "pe(p) returns pool_elts(p)");
vlib_cli_output (vm, "pifi(p, i) returns pool_is_free_index(p, i)");
vlib_cli_output (vm, "gdb_show_errors(0|1) dumps error counters");
vlib_cli_output (vm, "gdb_show_session dumps session counters");
vlib_cli_output (vm, "debug_hex_bytes (ptr, n_bytes) dumps n_bytes in hex");
vlib_cli_output (vm, "vlib_dump_frame_ownership() does what it says");
vlib_cli_output (vm, "vlib_runtime_index_to_node_name (index) prints NN");
return 0;
}
VLIB_CLI_COMMAND (show_gdb_funcs_command, static) = {
.path = "show gdb",
.short_help = "Describe functions which can be called from gdb",
.function = show_gdb_command_fn,
};
vnet_buffer_opaque_t *vb (void *vb_arg)
{
vlib_buffer_t *b = (vlib_buffer_t *)vb_arg;
vnet_buffer_opaque_t *rv;
rv = vnet_buffer (b);
return rv;
}
/* Cafeteria plan, maybe you don't want these functions */
clib_error_t *
gdb_func_init (vlib_main_t * vm) { return 0; }
VLIB_INIT_FUNCTION (gdb_func_init);
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