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From c32abfea658ef33c20a942700277cb52baf95bfa Mon Sep 17 00:00:00 2001
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From: Tao Liu <ltao@redhat.com>
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Date: Thu, 25 Aug 2022 14:39:44 +0800
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Subject: [PATCH 17/28] Fix "task -R" by adding end identifier for union in
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task_struct
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Previously, the start and end identifiers for union are " {\n" and
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" }, \n". However the end identifier is not always as expected.
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" },\n" can also be the end identifier with gdb-10.2. As a result,
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variable "randomized" is in incorrect state after union, and fails to
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identify the later struct members. For example, we can reproduce the
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issue as follows:
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crash> task
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PID: 847 TASK: ffff94f8038f4000 CPU: 72 COMMAND: "khungtaskd"
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struct task_struct {
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thread_info = {
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flags = 2148024320,
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status = 0,
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preempt_lazy_count = 0
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},
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{
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<the union>
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},
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...
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wake_entry = {
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next = 0x0
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},
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...
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Before patch:
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crash> task -R wake_entry
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PID: 847 TASK: ffff94f8038f4000 CPU: 72 COMMAND: "khungtaskd"
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After patch:
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crash> task -R wake_entry
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PID: 847 TASK: ffff94f8038f4000 CPU: 72 COMMAND: "khungtaskd"
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wake_entry = {
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next = 0x0
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},
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Signed-off-by: Tao Liu <ltao@redhat.com>
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Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
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---
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task.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/task.c b/task.c
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index 071c787fbfa5..db2abc8106a2 100644
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--- a/task.c
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+++ b/task.c
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@@ -3436,7 +3436,8 @@ parse_task_thread(int argcnt, char *arglist[], struct task_context *tc) {
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while (fgets(buf, BUFSIZE, pc->tmpfile)) {
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if (STREQ(buf, " {\n"))
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randomized = TRUE;
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- else if (randomized && STREQ(buf, " }, \n"))
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+ else if (randomized &&
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+ (STREQ(buf, " }, \n") || STREQ(buf, " },\n")))
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randomized = FALSE;
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if (strlen(lookfor2)) {
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--
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2.37.1
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