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authorKuan-Ying Lee2023-08-08 16:30:18 +0800
committerAndrew Morton2023-08-21 13:46:23 -0700
commit852622bf3616034e11e20955aa2d8d40c200138e (patch)
tree52aa7e10823140c742cc24ebad01d788fad7ed30 /scripts
parent79939c4a79bc643d399bd3fdd0f87100ea6b4362 (diff)
scripts/gdb/vmalloc: add vmallocinfo support
This GDB script shows the vmallocinfo for user to analyze the vmalloc memory usage. Example output: 0xffff800008000000-0xffff800008009000 36864 <start_kernel+372> pages=8 vmalloc 0xffff800008009000-0xffff80000800b000 8192 <gicv2m_init_one+400> phys=0x8020000 ioremap 0xffff80000800b000-0xffff80000800d000 8192 <bpf_prog_alloc_no_stats+72> pages=1 vmalloc 0xffff80000800d000-0xffff80000800f000 8192 <bpf_jit_alloc_exec+16> pages=1 vmalloc 0xffff800008010000-0xffff80000ad30000 47316992 <paging_init+452> phys=0x40210000 vmap 0xffff80000ad30000-0xffff80000c1c0000 21561344 <paging_init+556> phys=0x42f30000 vmap 0xffff80000c1c0000-0xffff80000c370000 1769472 <paging_init+592> phys=0x443c0000 vmap 0xffff80000c370000-0xffff80000de90000 28442624 <paging_init+692> phys=0x44570000 vmap 0xffff80000de90000-0xffff80000f4c1000 23269376 <paging_init+788> phys=0x46090000 vmap 0xffff80000f4c1000-0xffff80000f4c3000 8192 <gen_pool_add_owner+112> pages=1 vmalloc 0xffff80000f4c3000-0xffff80000f4c5000 8192 <gen_pool_add_owner+112> pages=1 vmalloc 0xffff80000f4c5000-0xffff80000f4c7000 8192 <gen_pool_add_owner+112> pages=1 vmalloc Link: https://lkml.kernel.org/r/20230808083020.22254-9-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>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/gdb/linux/constants.py.in8
-rw-r--r--scripts/gdb/linux/vmalloc.py56
-rw-r--r--scripts/gdb/vmlinux-gdb.py1
3 files changed, 65 insertions, 0 deletions
diff --git a/scripts/gdb/linux/constants.py.in b/scripts/gdb/linux/constants.py.in
index 03fa6d2cfe01..e3517d4ab8ec 100644
--- a/scripts/gdb/linux/constants.py.in
+++ b/scripts/gdb/linux/constants.py.in
@@ -22,6 +22,7 @@
#include <linux/radix-tree.h>
#include <linux/slab.h>
#include <linux/threads.h>
+#include <linux/vmalloc.h>
/* We need to stringify expanded macros so that they can be parsed */
@@ -91,6 +92,13 @@ LX_GDBPARSED(RADIX_TREE_MAP_SIZE)
LX_GDBPARSED(RADIX_TREE_MAP_SHIFT)
LX_GDBPARSED(RADIX_TREE_MAP_MASK)
+/* linux/vmalloc.h */
+LX_VALUE(VM_IOREMAP)
+LX_VALUE(VM_ALLOC)
+LX_VALUE(VM_MAP)
+LX_VALUE(VM_USERMAP)
+LX_VALUE(VM_DMA_COHERENT)
+
/* linux/page_ext.h */
if IS_BUILTIN(CONFIG_PAGE_OWNER):
LX_GDBPARSED(PAGE_EXT_OWNER)
diff --git a/scripts/gdb/linux/vmalloc.py b/scripts/gdb/linux/vmalloc.py
new file mode 100644
index 000000000000..48e4a4fae7bb
--- /dev/null
+++ b/scripts/gdb/linux/vmalloc.py
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2023 MediaTek Inc.
+#
+# Authors:
+# Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
+#
+
+import gdb
+import re
+from linux import lists, utils, stackdepot, constants, mm
+
+vmap_area_type = utils.CachedType('struct vmap_area')
+vmap_area_ptr_type = vmap_area_type.get_type().pointer()
+
+def is_vmalloc_addr(x):
+ pg_ops = mm.page_ops().ops
+ addr = pg_ops.kasan_reset_tag(x)
+ return addr >= pg_ops.VMALLOC_START and addr < pg_ops.VMALLOC_END
+
+class LxVmallocInfo(gdb.Command):
+ """Show vmallocinfo"""
+
+ def __init__(self):
+ super(LxVmallocInfo, self).__init__("lx-vmallocinfo", gdb.COMMAND_DATA)
+
+ def invoke(self, arg, from_tty):
+ vmap_area_list = gdb.parse_and_eval('vmap_area_list')
+ for vmap_area in lists.list_for_each_entry(vmap_area_list, vmap_area_ptr_type, "list"):
+ if not vmap_area['vm']:
+ gdb.write("0x%x-0x%x %10d vm_map_ram\n" % (vmap_area['va_start'], vmap_area['va_end'],
+ vmap_area['va_end'] - vmap_area['va_start']))
+ continue
+ v = vmap_area['vm']
+ gdb.write("0x%x-0x%x %10d" % (v['addr'], v['addr'] + v['size'], v['size']))
+ if v['caller']:
+ gdb.write(" %s" % str(v['caller']).split(' ')[-1])
+ if v['nr_pages']:
+ gdb.write(" pages=%d" % v['nr_pages'])
+ if v['phys_addr']:
+ gdb.write(" phys=0x%x" % v['phys_addr'])
+ if v['flags'] & constants.LX_VM_IOREMAP:
+ gdb.write(" ioremap")
+ if v['flags'] & constants.LX_VM_ALLOC:
+ gdb.write(" vmalloc")
+ if v['flags'] & constants.LX_VM_MAP:
+ gdb.write(" vmap")
+ if v['flags'] & constants.LX_VM_USERMAP:
+ gdb.write(" user")
+ if v['flags'] & constants.LX_VM_DMA_COHERENT:
+ gdb.write(" dma-coherent")
+ if is_vmalloc_addr(v['pages']):
+ gdb.write(" vpages")
+ gdb.write("\n")
+
+LxVmallocInfo()
diff --git a/scripts/gdb/vmlinux-gdb.py b/scripts/gdb/vmlinux-gdb.py
index 2526364f31fd..fc53cdf286f1 100644
--- a/scripts/gdb/vmlinux-gdb.py
+++ b/scripts/gdb/vmlinux-gdb.py
@@ -48,3 +48,4 @@ else:
import linux.stackdepot
import linux.page_owner
import linux.slab
+ import linux.vmalloc