17c4531bf1
These gdb macros should prove very helpul when poking around in core files. Pifi (pool_is_free_index) is not straighforward. Best to work it out once. Others: bitmap_get = clib_bitmap_get vl = vec_len pe = pool_elts node_name_from_index, as described vnet_buffer_opaque, prints the primary buffer opaque vnet_buffer_opaque2, prints the secondary buffer opaque Fix vppinfra unit-test compile error Type: improvement Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: Id2a2391a47e5a07cf3757f473e3805cc04784161
101 lines
3.1 KiB
Plaintext
101 lines
3.1 KiB
Plaintext
# Copyright (c) 2020 Cisco and/or its affiliates.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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echo Loading vpp functions...\n
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echo Load vl
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# vl, aka vec_len (x)
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# The vector length is 8 bytes before the vector pointer
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define vl
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echo vec_len ($arg0):
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p/d ((u32 *)((u8 *)(($arg0))-8))[0]
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end
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document vl
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Usage: vl <vector>
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Prints the length of a vector
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end
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echo Load pe\n
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# pe, aka pool_elts; the number of elements in the vector, minus the
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# length of the free element vector. The free element vector is at
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# offset -40 from the user pointer
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define pe
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echo pool_elts ($arg0):
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p/d ((((u32 *)((u8 *)(($arg0))-8))[0]) - (((u32 *)((u8 *)(($arg0))-40))[0]))
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end
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document pe
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Usage: pe <pool>
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Prints the number of active elements in a pool
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end
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echo Load pifi\n
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# pifi, aka pool_is_free_index. Print 1 if the pool index is free, 0 if
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# it's in-use.
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#
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# If the index is less than the pool vector
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# length, see if the indicated bit in the indicated bitmap word is set.
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# Otherwise, the index is not in use
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#
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# If you wonder why you might want a gdb macro to work this out when looking
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# at a core file, just look at the expression...
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define pifi
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echo pool_is_free_index ($arg0, $arg1)
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p ($arg1 < (((u32 *)((u8 *)(($arg0))-8))[0])) ? (((1ULL<<(($arg1)%64)) & \
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((u64 **)(((u8 *)($arg0)-48)))[0][($arg1)/64]) !=0) : 1
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end
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document pifi
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Usage: pifi <pool-pointer> <index>
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Print 1 if a specific pool index is free (or out of range), 0 if it's in-use
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end
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echo Load node_name_from_index\n
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define node_name_from_index
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p vlib_global_main.node_main.nodes[$arg0].name
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end
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document node_name_from_index
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Usage: node_name_from_index <index>
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Print node name given a node index (or node runtime index)
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end
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echo Load vnet_buffer_opaque\n
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define vnet_buffer_opaque
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p ((vnet_buffer_opaque_t *)(&((vlib_buffer_t *)($arg0))->opaque[0]))[0]
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end
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document vnet_buffer_opaque
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Usage: vnet_buffer_opaque <vlib_buffer_t pointer>
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Print the vnet buffer opaque given a vlib_buffer_t
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end
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echo Load vnet_buffer_opaque2\n
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define vnet_buffer_opaque2
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p ((vnet_buffer_opaque2_t *)(&((vlib_buffer_t *)($arg0))->opaque2[0]))[0]
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end
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document vnet_buffer_opaque2
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Usage: vnet_buffer_opaque2 <vlib_buffer_t pointer>
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Print the vnet buffer opaque2 given a vlib_buffer_t
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end
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echo Load bitmap_get\n
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define bitmap_get
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echo bitmap get ($arg0, $arg1):
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p ($arg1/64 < ((u32 *)((u8 *)($arg0)-8))[0]) ? (((1ULL<<(($arg1)%64)) & \
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((u64 *)(($arg0)))[($arg1)/64]) != 0) : 0
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end
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document bitmap_get
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Usage: bitmap_get <bitmap> <index>
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Print 1 if a specific bitmap index is set, 0 if it's not set or out of range
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end
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echo Done loading vpp functions...\n
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