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| author | Vineet Gupta <vgupta@synopsys.com> | 2020-08-06 22:37:36 -0700 |
|---|---|---|
| committer | Vineet Gupta <vgupta@kernel.org> | 2021-10-18 10:20:04 -0700 |
| commit | b1afff27a36ab56a6ed1d5933731a360aa896ad3 (patch) | |
| tree | eef370540a4ee39ef75f28f49252ab8344a3fb09 | |
| parent | 31629f213dffeacb54300d56f1aecb69b05f6ab1 (diff) | |
| download | arc-b1afff27a36ab56a6ed1d5933731a360aa896ad3.tar.gz | |
xxx: debug fork/execve
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
| -rw-r--r-- | arch/arc/kernel/setup.c | 1 | ||||
| -rw-r--r-- | fs/exec.c | 6 | ||||
| -rw-r--r-- | kernel/fork.c | 12 | ||||
| -rw-r--r-- | kernel/kthread.c | 5 |
4 files changed, 24 insertions, 0 deletions
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c index 7eb620ca1424f..4dfe0543928bd 100644 --- a/arch/arc/kernel/setup.c +++ b/arch/arc/kernel/setup.c @@ -39,6 +39,7 @@ unsigned int intr_to_DE_cnt; int __initdata uboot_tag; int __initdata uboot_magic; char __initdata *uboot_arg; +int arc_debug = 0; const struct machine_desc *machine_desc; diff --git a/fs/exec.c b/fs/exec.c index a098c133d8d74..2a6bc19181031 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1791,6 +1791,8 @@ static int exec_binprm(struct linux_binprm *bprm) return 0; } +extern int arc_debug; + /* * sys_execve() executes a new program. */ @@ -1804,6 +1806,10 @@ static int bprm_execve(struct linux_binprm *bprm, if (retval) return retval; + if (arc_debug) + printk("\n(%d) EXECVE: %p %s\n", + current->pid, current, filename->name); + check_unsafe_exec(bprm); current->in_execve = 1; diff --git a/kernel/fork.c b/kernel/fork.c index 38681ad44c76b..27c8ce0c387b0 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -127,6 +127,8 @@ int nr_threads; /* The idle threads do not count.. */ static int max_threads; /* tunable limit on nr_threads */ +extern int arc_debug; + #define NAMED_ARRAY_INDEX(x) [x] = __stringify(x) static const char * const resident_page_types[] = { @@ -2273,6 +2275,9 @@ static __latent_entropy struct task_struct *copy_process( p->tgid = p->pid; } + if (arc_debug) + printk("(%d) New child %p (%d)\n\n", current->pid, p, p->pid); + p->nr_dirtied = 0; p->nr_dirtied_pause = 128 >> (PAGE_SHIFT - 10); p->dirty_paused_when = 0; @@ -2581,6 +2586,13 @@ pid_t kernel_clone(struct kernel_clone_args *args) trace = 0; } + if (arc_debug) { + char comm[TASK_COMM_LEN]; + printk("(%d)/%d Fork: \'%s\'\n", + current->pid, current->tgid, + get_task_comm(comm, current)); + } + p = copy_process(NULL, trace, NUMA_NO_NODE, args); add_latent_entropy(); diff --git a/kernel/kthread.c b/kernel/kthread.c index 5b37a8567168b..5db8e0d1c37f5 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -331,10 +331,15 @@ int tsk_fork_get_node(struct task_struct *tsk) return NUMA_NO_NODE; } +extern int arc_debug; + static void create_kthread(struct kthread_create_info *create) { int pid; + if (arc_debug) + printk("\nkthread fn %pS\n", create->threadfn); + #ifdef CONFIG_NUMA current->pref_node_fork = create->node; #endif |