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79939c4a79
Add 'lx-slabinfo' and 'lx-slabtrace' support.
This GDB scripts print slabinfo and slabtrace for user
to analyze slab memory usage.
Example output like below:
(gdb) lx-slabinfo
Pointer | name | active_objs | num_objs | objsize | objperslab | pagesperslab
------------------ | -------------------- | ------------ | ------------ | -------- | ----------- | -------------
0xffff0000c59df480 | p9_req_t | 0 | 0 | 280 | 29 | 2
0xffff0000c59df280 | isp1760_qh | 0 | 0 | 160 | 25 | 1
0xffff0000c59df080 | isp1760_qtd | 0 | 0 | 184 | 22 | 1
0xffff0000c59dee80 | isp1760_urb_listite | 0 | 0 | 136 | 30 | 1
0xffff0000c59dec80 | asd_sas_event | 0 | 0 | 256 | 32 | 2
0xffff0000c59dea80 | sas_task | 0 | 0 | 448 | 36 | 4
0xffff0000c59de880 | bio-120 | 18 | 21 | 384 | 21 | 2
0xffff0000c59de680 | io_kiocb | 0 | 0 | 448 | 36 | 4
0xffff0000c59de480 | bfq_io_cq | 0 | 0 | 1504 | 21 | 8
0xffff0000c59de280 | bfq_queue | 0 | 0 | 720 | 22 | 4
0xffff0000c59de080 | mqueue_inode_cache | 1 | 28 | 1152 | 28 | 8
0xffff0000c59dde80 | v9fs_inode_cache | 0 | 0 | 832 | 39 | 8
...
(gdb) lx-slabtrace --cache_name kmalloc-1k
63 <tty_register_device_attr+508> waste=16632/264 age=46856/46871/46888 pid=1 cpus=6,
0xffff800008720240 <__kmem_cache_alloc_node+236>: mov x22, x0
0xffff80000862a4fc <kmalloc_trace+64>: mov x21, x0
0xffff8000095d086c <tty_register_device_attr+508>: mov x19, x0
0xffff8000095d0f98 <tty_register_driver+704>: cmn x0, #0x1, lsl #12
0xffff80000c2677e8 <vty_init+620>: Cannot access memory at address 0xffff80000c2677e8
0xffff80000c265a10 <tty_init+276>: Cannot access memory at address 0xffff80000c265a10
0xffff80000c26d3c4 <chr_dev_init+204>: Cannot access memory at address 0xffff80000c26d3c4
0xffff8000080161d4 <do_one_initcall+176>: mov w21, w0
0xffff80000c1c1b58 <kernel_init_freeable+956>: Cannot access memory at address 0xffff80000c1c1b58
0xffff80000acf1334 <kernel_init+36>: bl 0xffff8000081ac040 <async_synchronize_full>
0xffff800008018d00 <ret_from_fork+16>: mrs x28, sp_el0
(gdb) lx-slabtrace --cache_name kmalloc-1k --free
428 <not-available> age=4294958600 pid=0 cpus=0,
Link: https://lkml.kernel.org/r/20230808083020.22254-8-Kuan-Ying.Lee@mediatek.com
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: Chinwen Chang <chinwen.chang@mediatek.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
152 lines
3.8 KiB
Python
152 lines
3.8 KiB
Python
/*
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* gdb helper commands and functions for Linux kernel debugging
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*
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* Kernel constants derived from include files.
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*
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* Copyright (c) 2016 Linaro Ltd
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*
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* Authors:
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* Kieran Bingham <kieran.bingham@linaro.org>
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*
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* This work is licensed under the terms of the GNU GPL version 2.
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*
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*/
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#include <linux/clk-provider.h>
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#include <linux/fs.h>
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#include <linux/hrtimer.h>
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#include <linux/irq.h>
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#include <linux/mount.h>
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#include <linux/of_fdt.h>
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#include <linux/page_ext.h>
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#include <linux/radix-tree.h>
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#include <linux/slab.h>
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#include <linux/threads.h>
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/* We need to stringify expanded macros so that they can be parsed */
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#define STRING(x) #x
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#define XSTRING(x) STRING(x)
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#define LX_VALUE(x) LX_##x = x
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#define LX_GDBPARSED(x) LX_##x = gdb.parse_and_eval(XSTRING(x))
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/*
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* IS_ENABLED generates (a || b) which is not compatible with python
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* We can only switch on configuration items we know are available
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* Therefore - IS_BUILTIN() is more appropriate
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*/
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#define LX_CONFIG(x) LX_##x = IS_BUILTIN(x)
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/* The build system will take care of deleting everything above this marker */
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<!-- end-c-headers -->
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import gdb
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LX_CONFIG(CONFIG_DEBUG_INFO_REDUCED)
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/* linux/clk-provider.h */
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if IS_BUILTIN(CONFIG_COMMON_CLK):
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LX_GDBPARSED(CLK_GET_RATE_NOCACHE)
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/* linux/fs.h */
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LX_GDBPARSED(SB_RDONLY)
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LX_GDBPARSED(SB_SYNCHRONOUS)
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LX_GDBPARSED(SB_MANDLOCK)
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LX_GDBPARSED(SB_DIRSYNC)
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LX_GDBPARSED(SB_NOATIME)
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LX_GDBPARSED(SB_NODIRATIME)
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/* linux/htimer.h */
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LX_GDBPARSED(hrtimer_resolution)
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/* linux/irq.h */
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LX_GDBPARSED(IRQD_LEVEL)
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LX_GDBPARSED(IRQ_HIDDEN)
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/* linux/module.h */
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LX_GDBPARSED(MOD_TEXT)
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LX_GDBPARSED(MOD_DATA)
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LX_GDBPARSED(MOD_RODATA)
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LX_GDBPARSED(MOD_RO_AFTER_INIT)
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/* linux/mount.h */
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LX_VALUE(MNT_NOSUID)
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LX_VALUE(MNT_NODEV)
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LX_VALUE(MNT_NOEXEC)
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LX_VALUE(MNT_NOATIME)
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LX_VALUE(MNT_NODIRATIME)
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LX_VALUE(MNT_RELATIME)
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/* linux/threads.h */
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LX_VALUE(NR_CPUS)
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/* linux/of_fdt.h> */
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LX_VALUE(OF_DT_HEADER)
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/* linux/radix-tree.h */
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LX_GDBPARSED(RADIX_TREE_ENTRY_MASK)
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LX_GDBPARSED(RADIX_TREE_INTERNAL_NODE)
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LX_GDBPARSED(RADIX_TREE_MAP_SIZE)
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LX_GDBPARSED(RADIX_TREE_MAP_SHIFT)
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LX_GDBPARSED(RADIX_TREE_MAP_MASK)
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/* linux/page_ext.h */
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if IS_BUILTIN(CONFIG_PAGE_OWNER):
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LX_GDBPARSED(PAGE_EXT_OWNER)
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LX_GDBPARSED(PAGE_EXT_OWNER_ALLOCATED)
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/* linux/slab.h */
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LX_GDBPARSED(SLAB_RED_ZONE)
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LX_GDBPARSED(SLAB_POISON)
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LX_GDBPARSED(SLAB_KMALLOC)
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LX_GDBPARSED(SLAB_HWCACHE_ALIGN)
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LX_GDBPARSED(SLAB_CACHE_DMA)
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LX_GDBPARSED(SLAB_CACHE_DMA32)
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LX_GDBPARSED(SLAB_STORE_USER)
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LX_GDBPARSED(SLAB_PANIC)
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/* Kernel Configs */
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LX_CONFIG(CONFIG_GENERIC_CLOCKEVENTS)
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LX_CONFIG(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST)
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LX_CONFIG(CONFIG_HIGH_RES_TIMERS)
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LX_CONFIG(CONFIG_NR_CPUS)
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LX_CONFIG(CONFIG_OF)
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LX_CONFIG(CONFIG_TICK_ONESHOT)
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LX_CONFIG(CONFIG_GENERIC_IRQ_SHOW_LEVEL)
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LX_CONFIG(CONFIG_X86_LOCAL_APIC)
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LX_CONFIG(CONFIG_SMP)
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LX_CONFIG(CONFIG_X86_THERMAL_VECTOR)
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LX_CONFIG(CONFIG_X86_MCE_THRESHOLD)
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LX_CONFIG(CONFIG_X86_MCE_AMD)
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LX_CONFIG(CONFIG_X86_MCE)
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LX_CONFIG(CONFIG_X86_IO_APIC)
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LX_CONFIG(CONFIG_HAVE_KVM)
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LX_CONFIG(CONFIG_NUMA)
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LX_CONFIG(CONFIG_ARM64)
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LX_CONFIG(CONFIG_ARM64_4K_PAGES)
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LX_CONFIG(CONFIG_ARM64_16K_PAGES)
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LX_CONFIG(CONFIG_ARM64_64K_PAGES)
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if IS_BUILTIN(CONFIG_ARM64):
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LX_VALUE(CONFIG_ARM64_PA_BITS)
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LX_VALUE(CONFIG_ARM64_VA_BITS)
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LX_VALUE(CONFIG_ARM64_PAGE_SHIFT)
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LX_VALUE(CONFIG_ARCH_FORCE_MAX_ORDER)
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LX_CONFIG(CONFIG_SPARSEMEM)
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LX_CONFIG(CONFIG_SPARSEMEM_EXTREME)
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LX_CONFIG(CONFIG_SPARSEMEM_VMEMMAP)
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LX_CONFIG(CONFIG_KASAN)
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LX_CONFIG(CONFIG_KASAN_GENERIC)
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LX_CONFIG(CONFIG_KASAN_SW_TAGS)
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LX_CONFIG(CONFIG_KASAN_HW_TAGS)
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if IS_BUILTIN(CONFIG_KASAN_GENERIC) or IS_BUILTIN(CONFIG_KASAN_SW_TAGS):
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LX_VALUE(CONFIG_KASAN_SHADOW_OFFSET)
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LX_CONFIG(CONFIG_VMAP_STACK)
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if IS_BUILTIN(CONFIG_NUMA):
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LX_VALUE(CONFIG_NODES_SHIFT)
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LX_CONFIG(CONFIG_DEBUG_VIRTUAL)
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LX_CONFIG(CONFIG_STACKDEPOT)
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LX_CONFIG(CONFIG_PAGE_OWNER)
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LX_CONFIG(CONFIG_SLUB_DEBUG)
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LX_CONFIG(CONFIG_SLAB_FREELIST_HARDENED)
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