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misc: add gdb helpers for vlib buffers

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Type: feature

Change-Id: I7e619040857310fffd33c355f6c491a55f7a4a02
Signed-off-by: Benoît Ganne <bganne@cisco.com>
This commit is contained in:
Benoît Ganne
2019-11-21 16:53:31 +01:00
committed by Damjan Marion
parent e69f471432
commit 2b65f9ca04
2 changed files with 34 additions and 0 deletions
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7
src/vlib/buffer_funcs.h
View File

@ -474,6 +474,13 @@ vlib_buffer_is_known (vlib_main_t * vm, u32 buffer_index)
u8 *vlib_validate_buffer (vlib_main_t * vm, u32 buffer_index,
uword follow_chain);
u8 *vlib_validate_buffers (vlib_main_t * vm,
u32 * buffers,
uword next_buffer_stride,
uword n_buffers,
vlib_buffer_known_state_t known_state,
uword follow_buffer_next);
static_always_inline vlib_buffer_pool_t *
vlib_get_buffer_pool (vlib_main_t * vm, u8 buffer_pool_index)
{

27
src/vnet/unix/gdb_funcs.c
View File

@ -272,11 +272,13 @@ show_gdb_command_fn (vlib_main_t * vm,
vlib_cli_output (vm, "vl(p) returns vec_len(p)");
vlib_cli_output (vm, "vb(b) returns vnet_buffer(b) [opaque]");
vlib_cli_output (vm, "vb2(b) returns vnet_buffer2(b) [opaque2]");
vlib_cli_output (vm, "vbi(b) returns b index");
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, "gdb_show_traces() dumps buffer traces");
vlib_cli_output (vm, "gdb_validate_buffer(b) check vlib_buffer b sanity");
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");
@ -314,6 +316,31 @@ vb2 (void *vb_arg)
return rv;
}
u32
vbi (vlib_buffer_t * b)
{
vlib_main_t *vm = vlib_get_main ();
vlib_buffer_main_t *bm = vm->buffer_main;
u32 bi = pointer_to_uword (b) - bm->buffer_mem_start;
bi >>= CLIB_LOG2_CACHE_LINE_BYTES;
return bi;
}
int
gdb_validate_buffer (vlib_buffer_t * b)
{
vlib_main_t *vm = vlib_get_main ();
u32 bi = vbi (b);
u8 *s =
vlib_validate_buffers (vm, &bi, 0, 1, VLIB_BUFFER_KNOWN_ALLOCATED, 1);
if (s)
{
fformat (stderr, "gdb_validate_buffer(): %v", s);
return -1;
}
fformat (stderr, "gdb_validate_buffer(): no error found\n");
return 0;
}
/* Cafeteria plan, maybe you don't want these functions */
clib_error_t *