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19b4911d7fdb9d6d596c9221f3d88a6fb37cf9a5
nuttx/tools/gdb/thread.py
hujun5 19b4911d7f arch: remove up_current_regs in common code 
reason:

When entering an exception or interrupt, there are two sets of registers:
one is the "running regs", which we need to save,
and the other is the "ready to running regs", which we may soon use.
For consistency in logic, we can always store the "running regs" in the regs field of g_running_tasks,
otherwise it may lead to errors in the storage location of the "running regs."

When we need to access the "running regs," we should uniformly retrieve them from the regs field of g_running_tasks.

As the next step, we will rename the set_current_regs/up_current_regs functions
for each architecture to more appropriate names, solely for the purpose of identifying interrupts.

Signed-off-by: hujun5 <hujun5@xiaomi.com>
2024-11-15 18:25:35 +08:00

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############################################################################
# tools/gdb/thread.py
#
# SPDX-License-Identifier: Apache-2.0
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership. The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################
import gdb
import utils
UINT16_MAX = 0xFFFF
saved_regs = None
def save_regs():
global saved_regs
tcbinfo = gdb.parse_and_eval("g_tcbinfo")
if saved_regs is not None:
return
arch = gdb.selected_frame().architecture()
saved_regs = []
i = 0
for reg in arch.registers():
if i >= tcbinfo["regs_num"]:
break
saved_regs.append(gdb.parse_and_eval("$%s" % reg.name))
i += 1
def restore_regs():
tcbinfo = gdb.parse_and_eval("g_tcbinfo")
global saved_regs
if saved_regs is None:
return
arch = gdb.selected_frame().architecture()
i = 0
for reg in arch.registers():
if i >= tcbinfo["regs_num"]:
break
gdb.execute("set $%s=%d" % (reg.name, int(saved_regs[i])))
i += 1
saved_regs = None
class Nxsetregs(gdb.Command):
"""
Set registers to the specified values.
Usage: nxsetregs [regs]
Etc: nxsetregs
nxsetregs g_current_regs[0]
nxsetregs tcb->xcp.regs
Nxsetregs g_pidhash[0].tcb->xcp.regs
Default regs is g_current_regs[0],if regs is NULL, it will not set registers.
"""
def __init__(self):
super(Nxsetregs, self).__init__("nxsetregs", gdb.COMMAND_USER)
def invoke(self, args, from_tty):
gdb.execute("set $_current_regs=tcbinfo_running_regs()")
current_regs = gdb.parse_and_eval("$_current_regs")
tcbinfo = gdb.parse_and_eval("g_tcbinfo")
arg = args.split(" ")
if arg[0] != "":
regs = gdb.parse_and_eval("%s" % arg[0]).cast(
gdb.lookup_type("char").pointer()
)
else:
regs = current_regs.cast(gdb.lookup_type("char").pointer())
if regs == 0:
gdb.write("regs is NULL\n")
return
save_regs()
arch = gdb.selected_frame().architecture()
i = 0
for reg in arch.registers():
if i >= tcbinfo["regs_num"]:
return
if tcbinfo["reg_off"]["p"][i] != UINT16_MAX:
value = gdb.Value(regs + tcbinfo["reg_off"]["p"][i]).cast(
gdb.lookup_type("uintptr_t").pointer()
)[0]
gdb.execute("set $%s = 0x%x" % (reg.name, value))
i += 1
def get_pc_value(tcb):
arch = gdb.selected_frame().architecture()
tcbinfo = gdb.parse_and_eval("g_tcbinfo")
i = 0
for reg in arch.registers():
if reg.name == "pc" or reg.name == "rip" or reg.name == "eip":
break
i += 1
regs = tcb["xcp"]["regs"].cast(gdb.lookup_type("char").pointer())
value = gdb.Value(regs + tcbinfo["reg_off"]["p"][i]).cast(
gdb.lookup_type("uintptr_t").pointer()
)[0]
return int(value)
class Nxinfothreads(gdb.Command):
def __init__(self):
super(Nxinfothreads, self).__init__("info threads", gdb.COMMAND_USER)
def invoke(self, args, from_tty):
npidhash = gdb.parse_and_eval("g_npidhash")
pidhash = gdb.parse_and_eval("g_pidhash")
statenames = gdb.parse_and_eval("g_statenames")
if utils.is_target_smp():
gdb.write(
"%-4s %-4s %-21s %-80s %-30s\n"
% ("Id", "Cpu", "Thread", "Info", "Frame")
)
else:
gdb.write("%-4s %-21s %-80s %-30s\n" % ("Id", "Thread", "Info", "Frame"))
for i in range(0, npidhash):
if pidhash[i] == 0:
continue
if pidhash[i]["task_state"] == gdb.parse_and_eval("TSTATE_TASK_RUNNING"):
id = "*%s" % i
pc = int(gdb.parse_and_eval("$pc"))
else:
id = "%s" % i
pc = get_pc_value(pidhash[i])
thread = "Thread 0x%x" % pidhash[i]
try:
"""Maybe tcb not have name member, or name is not utf-8"""
info = "(Name: %s, State: %s, Priority: %d, Stack: %d)" % (
pidhash[i]["name"].string(),
statenames[pidhash[i]["task_state"]].string(),
pidhash[i]["sched_priority"],
pidhash[i]["adj_stack_size"],
)
except gdb.error and UnicodeDecodeError:
info = "(Name: Not utf-8, State: %s, Priority: %d, Stack: %d)" % (
statenames[pidhash[i]["task_state"]].string(),
pidhash[i]["sched_priority"],
pidhash[i]["adj_stack_size"],
)
line = gdb.find_pc_line(pc)
if line.symtab:
func = gdb.execute("info symbol %d " % pc, to_string=True)
frame = "0x%x %s at %s:%d" % (
pc,
func.split()[0] + "()",
line.symtab,
line.line,
)
else:
frame = "No symbol with pc"
if utils.is_target_smp():
cpu = "%d" % pidhash[i]["cpu"]
gdb.write(
"%-4s %-4s %-21s %-80s %-30s\n" % (id, cpu, thread, info, frame)
)
else:
gdb.write("%-4s %-21s %-80s %-30s\n" % (id, thread, info, frame))
class Nxthread(gdb.Command):
def __init__(self):
super(Nxthread, self).__init__("thread", gdb.COMMAND_USER)
def invoke(self, args, from_tty):
npidhash = gdb.parse_and_eval("g_npidhash")
pidhash = gdb.parse_and_eval("g_pidhash")
arg = args.split(" ")
arglen = len(arg)
if arg[0] == "":
pass
elif arg[0] == "apply":
if arglen <= 1:
gdb.write("Please specify a thread ID list\n")
elif arglen <= 2:
gdb.write("Please specify a command following the thread ID list\n")
elif arg[1] == "all":
for i in range(0, npidhash):
if pidhash[i] == 0:
continue
try:
gdb.write("Thread %d %s\n" % (i, pidhash[i]["name"].string()))
except gdb.error and UnicodeDecodeError:
gdb.write("Thread %d\n" % (i))
gdb.execute("nxsetregs g_pidhash[%d]->xcp.regs" % i)
cmd_arg = ""
for cmd in arg[2:]:
cmd_arg += cmd + " "
gdb.execute("%s\n" % cmd_arg)
restore_regs()
else:
threadlist = []
i = 0
cmd = ""
for i in range(1, arglen):
if arg[i].isnumeric():
threadlist.append(int(arg[i]))
else:
cmd += arg[i] + " "
if len(threadlist) == 0 or cmd == "":
gdb.write("Please specify a thread ID list and command\n")
else:
for i in threadlist:
if i >= npidhash:
break
if pidhash[i] == 0:
continue
try:
gdb.write(
"Thread %d %s\n" % (i, pidhash[i]["name"].string())
)
except gdb.error and UnicodeDecodeError:
gdb.write("Thread %d\n" % (i))
gdb.execute("nxsetregs g_pidhash[%d]->xcp.regs" % i)
gdb.execute("%s\n" % cmd)
restore_regs()
else:
if arg[0].isnumeric() and pidhash[int(arg[0])] != 0:
gdb.execute("nxsetregs g_pidhash[%s]->xcp.regs" % arg[0])
else:
gdb.write("Invalid thread id %s\n" % arg[0])
class Nxcontinue(gdb.Command):
def __init__(self):
super(Nxcontinue, self).__init__("nxcontinue", gdb.COMMAND_USER)
def invoke(self, args, from_tty):
restore_regs()
gdb.execute("continue")
# We can't use a user command to rename continue it will recursion
gdb.execute("define c\n nxcontinue \n end\n")
gdb.write("\nif use thread command, please don't use 'continue', use 'c' instead !!!\n")
Nxsetregs()
Nxinfothreads()
Nxthread()
Nxcontinue()
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