+ scripts-gdb-vmalloc-add-vmallocinfo-support.patch added to mm-nonmm-unstable branch

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The patch titled
     Subject: scripts/gdb/vmalloc: add vmallocinfo support
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     scripts-gdb-vmalloc-add-vmallocinfo-support.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/scripts-gdb-vmalloc-add-vmallocinfo-support.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx>
Subject: scripts/gdb/vmalloc: add vmallocinfo support
Date: Tue, 25 Jul 2023 17:34:58 +0800

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/20230725093458.30064-9-Kuan-Ying.Lee@xxxxxxxxxxxx
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx>
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Cc: Chinwen Chang <chinwen.chang@xxxxxxxxxxxx>
Cc: Matthias Brugger <matthias.bgg@xxxxxxxxx>
Cc: Qun-Wei Lin <qun-wei.lin@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 scripts/gdb/linux/constants.py.in |    8 ++++
 scripts/gdb/linux/vmalloc.py      |   56 ++++++++++++++++++++++++++++
 scripts/gdb/vmlinux-gdb.py        |    1 
 3 files changed, 65 insertions(+)

--- a/scripts/gdb/linux/constants.py.in~scripts-gdb-vmalloc-add-vmallocinfo-support
+++ a/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>
 #include <asm/memory.h>
 
 /* We need to stringify expanded macros so that they can be parsed */
@@ -96,6 +97,13 @@ if IS_BUILTIN(CONFIG_ARM64):
     LX_GDBPARSED(VA_BITS_MIN)
     LX_GDBPARSED(MODULES_VSIZE)
 
+/* 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 */
 LX_GDBPARSED(PAGE_EXT_OWNER)
 LX_GDBPARSED(PAGE_EXT_OWNER_ALLOCATED)
--- /dev/null
+++ a/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@xxxxxxxxxxxx>
+#
+
+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()
--- a/scripts/gdb/vmlinux-gdb.py~scripts-gdb-vmalloc-add-vmallocinfo-support
+++ a/scripts/gdb/vmlinux-gdb.py
@@ -48,3 +48,4 @@ else:
     import linux.stackdepot
     import linux.page_owner
     import linux.slab
+    import linux.vmalloc
_

Patches currently in -mm which might be from Kuan-Ying.Lee@xxxxxxxxxxxx are

scripts-gdb-symbols-add-specific-ko-module-load-command.patch
scripts-gdb-modules-add-get-module-text-support.patch
scripts-gdb-utils-add-common-type-usage.patch
scripts-gdb-aarch64-add-aarch64-page-operation-helper-commands-and-configs.patch
scripts-gdb-stackdepot-add-stackdepot-support.patch
scripts-gdb-page_owner-add-page-owner-support.patch
scripts-gdb-slab-add-slab-support.patch
scripts-gdb-vmalloc-add-vmallocinfo-support.patch




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