scripts/gdb/linux/interrupts.py

Source file repositories/reference/linux-study-clean/scripts/gdb/linux/interrupts.py

File Facts

System
Linux kernel
Corpus path
scripts/gdb/linux/interrupts.py
Extension
.py
Size
6120 bytes
Lines
201
Domain
Support Tooling And Documentation
Bucket
scripts
Inferred role
Support Tooling And Documentation: scripts
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: GPL-2.0
#
# Copyright 2023 Broadcom

import gdb

from linux import constants
from linux import cpus
from linux import utils
from linux import mapletree

irq_desc_type = utils.CachedType("struct irq_desc")

def irq_settings_is_hidden(desc):
    return desc['status_use_accessors'] & constants.LX_IRQ_HIDDEN

def irq_desc_is_chained(desc):
    return desc['action'] and desc['action'] == gdb.parse_and_eval("&chained_action")

def irqd_is_level(desc):
    return desc['irq_data']['common']['state_use_accessors'] & constants.LX_IRQD_LEVEL

def show_irq_desc(prec, chip_width, irq):
    text = ""

    desc = mapletree.mtree_load(gdb.parse_and_eval("&sparse_irqs"), irq)
    if desc is None:
        return text

    desc = desc.cast(irq_desc_type.get_type().pointer())
    if desc == 0:
        return text

    if irq_settings_is_hidden(desc):
        return text

    any_count = 0
    if desc['kstat_irqs']:
        for cpu in cpus.each_online_cpu():
            any_count += cpus.per_cpu(desc['kstat_irqs'], cpu)['cnt']

    if (desc['action'] == 0 or irq_desc_is_chained(desc)) and any_count == 0:
        return text;

    text += "%*d: " % (prec, irq)
    for cpu in cpus.each_online_cpu():
        if desc['kstat_irqs']:
            count = cpus.per_cpu(desc['kstat_irqs'], cpu)['cnt']
        else:
            count = 0
        text += "%10u " % (count)

    name = "None"
    if desc['irq_data']['chip']:
        chip = desc['irq_data']['chip']
        if chip['name']:
            name = chip['name'].string()
        else:
            name = "-"

    text += "  %-*s" % (chip_width, name)

    if desc['irq_data']['domain']:
        text += "  %*lu" % (prec, desc['irq_data']['hwirq'])
    else:
        text += "  %*s" % (prec, "")

    if constants.LX_CONFIG_GENERIC_IRQ_SHOW_LEVEL:
        text += " %-8s" % ("Level" if irqd_is_level(desc) else "Edge")

Annotation

Implementation Notes