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# Prints all menu nodes that reference a given symbol any of their properties
# or property conditions, along with their parent menu nodes.
#
# Usage:
#
# $ make [ARCH=<arch>] scriptconfig SCRIPT=Kconfiglib/examples/find_symbol.py SCRIPT_ARG=<name>
#
# Example output for SCRIPT_ARG=X86:
#
# Found 470 locations that reference X86:
#
# ========== Location 1 (init/Kconfig:1108) ==========
#
# config SGETMASK_SYSCALL
# bool
# prompt "sgetmask/ssetmask syscalls support" if EXPERT
# default PARISC || M68K || PPC || MIPS || X86 || SPARC || MICROBLAZE || SUPERH
# help
# sys_sgetmask and sys_ssetmask are obsolete system calls
# no longer supported in libc but still enabled by default in some
# architectures.
#
# If unsure, leave the default option here.
#
# ---------- Parent 1 (init/Kconfig:1077) ----------
#
# menuconfig EXPERT
# bool
# prompt "Configure standard kernel features (expert users)"
# select DEBUG_KERNEL
# help
# This option allows certain base kernel options and settings
# to be disabled or tweaked. This is for specialized
# environments which can tolerate a "non-standard" kernel.
# Only use this if you really know what you are doing.
#
# ---------- Parent 2 (init/Kconfig:39) ----------
#
# menu "General setup"
#
# ========== Location 2 (arch/Kconfig:29) ==========
#
# config OPROFILE_EVENT_MULTIPLEX
# bool
# prompt "OProfile multiplexing support (EXPERIMENTAL)" if OPROFILE && X86
# default "n" if OPROFILE && X86
# depends on OPROFILE && X86
# help
# The number of hardware counters is limited. The multiplexing
# feature enables OProfile to gather more events than counters
# are provided by the hardware. This is realized by switching
# between events at a user specified time interval.
#
# If unsure, say N.
#
# ---------- Parent 1 (arch/Kconfig:16) ----------
#
# config OPROFILE
# tristate
# prompt "OProfile system profiling" if PROFILING && HAVE_OPROFILE
# select RING_BUFFER if PROFILING && HAVE_OPROFILE
# select RING_BUFFER_ALLOW_SWAP if PROFILING && HAVE_OPROFILE
# depends on PROFILING && HAVE_OPROFILE
# help
# OProfile is a profiling system capable of profiling the
# whole system, include the kernel, kernel modules, libraries,
# and applications.
#
# If unsure, say N.
#
# ---------- Parent 2 (init/Kconfig:39) ----------
#
# menu "General setup"
#
# ... (tons more)
import sys
import kconfiglib
def referencing_nodes(node, sym):
# Returns a list of all menu nodes that reference 'sym' in any of their
# properties or property conditions
res = []
while node:
if sym in node.referenced:
res.append(node)
if node.list:
res.extend(referencing_nodes(node.list, sym))
node = node.next
return res
if len(sys.argv) < 3:
sys.exit('Pass symbol name (without "CONFIG_" prefix) with SCRIPT_ARG=<name>')
kconf = kconfiglib.Kconfig(sys.argv[1])
sym_name = sys.argv[2]
if sym_name not in kconf.syms:
print("No symbol {} exists in the configuration".format(sym_name))
sys.exit(0)
nodes = referencing_nodes(kconf.top_node, kconf.syms[sym_name])
if not nodes:
print("No reference to {} found".format(sym_name))
sys.exit(0)
print("Found {} locations that reference {}:\n"
.format(len(nodes), sym_name))
for i, node in enumerate(nodes, 1):
print("========== Location {} ({}:{}) ==========\n\n{}"
.format(i, node.filename, node.linenr, node))
# Print the parents of the menu node too
node = node.parent
parent_i = 1
while node is not kconf.top_node:
print("---------- Parent {} ({}:{}) ----------\n\n{}"
.format(parent_i, node.filename, node.linenr, node))
node = node.parent
parent_i += 1
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