From: Josh Stone Date: Mon, 24 Aug 2009 21:43:14 +0000 (-0700) Subject: tracing: Create generic syscall TRACE_EVENTs X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1c569f0264ea629c10bbab471dd0626ce4d3f19f;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git tracing: Create generic syscall TRACE_EVENTs This converts the syscall_enter/exit tracepoints into TRACE_EVENTs, so you can have generic ftrace events that capture all system calls with arguments and return values. These generic events are also renamed to sys_enter/exit, so they're more closely aligned to the specific sys_enter_foo events. Signed-off-by: Josh Stone Cc: Jason Baron Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Li Zefan Cc: Steven Rostedt Cc: Peter Zijlstra Cc: Mathieu Desnoyers Cc: Jiaying Zhang Cc: Martin Bligh Cc: Lai Jiangshan Cc: Paul Mundt Cc: Martin Schwidefsky Cc: Heiko Carstens LKML-Reference: <1251150194-1713-5-git-send-email-jistone@redhat.com> Signed-off-by: Frederic Weisbecker --- diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c index c05b44b80c23..f3ddd7ac06c5 100644 --- a/arch/s390/kernel/ptrace.c +++ b/arch/s390/kernel/ptrace.c @@ -51,8 +51,8 @@ #include "compat_ptrace.h" #endif -DEFINE_TRACE_FN(syscall_enter, syscall_regfunc, syscall_unregfunc); -DEFINE_TRACE_FN(syscall_exit, syscall_regfunc, syscall_unregfunc); +#define CREATE_TRACE_POINTS +#include enum s390_regset { REGSET_GENERAL, @@ -665,7 +665,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs) } if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) - trace_syscall_enter(regs, regs->gprs[2]); + trace_sys_enter(regs, regs->gprs[2]); if (unlikely(current->audit_context)) audit_syscall_entry(is_compat_task() ? @@ -683,7 +683,7 @@ asmlinkage void do_syscall_trace_exit(struct pt_regs *regs) regs->gprs[2]); if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) - trace_syscall_exit(regs, regs->gprs[2]); + trace_sys_exit(regs, regs->gprs[2]); if (test_thread_flag(TIF_SYSCALL_TRACE)) tracehook_report_syscall_exit(regs, 0); diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c index 31e9b97ec4d6..8d7d5c9c1be3 100644 --- a/arch/x86/kernel/ptrace.c +++ b/arch/x86/kernel/ptrace.c @@ -35,13 +35,11 @@ #include #include -#include - -DEFINE_TRACE_FN(syscall_enter, syscall_regfunc, syscall_unregfunc); -DEFINE_TRACE_FN(syscall_exit, syscall_regfunc, syscall_unregfunc); - #include "tls.h" +#define CREATE_TRACE_POINTS +#include + enum x86_regset { REGSET_GENERAL, REGSET_FP, @@ -1501,7 +1499,7 @@ asmregparm long syscall_trace_enter(struct pt_regs *regs) ret = -1L; if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) - trace_syscall_enter(regs, regs->orig_ax); + trace_sys_enter(regs, regs->orig_ax); if (unlikely(current->audit_context)) { if (IS_IA32) @@ -1527,7 +1525,7 @@ asmregparm void syscall_trace_leave(struct pt_regs *regs) audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax); if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) - trace_syscall_exit(regs, regs->ax); + trace_sys_exit(regs, regs->ax); if (test_thread_flag(TIF_SYSCALL_TRACE)) tracehook_report_syscall_exit(regs, 0); diff --git a/include/trace/events/syscalls.h b/include/trace/events/syscalls.h new file mode 100644 index 000000000000..397dff2dbd5a --- /dev/null +++ b/include/trace/events/syscalls.h @@ -0,0 +1,70 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM syscalls + +#if !defined(_TRACE_EVENTS_SYSCALLS_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_EVENTS_SYSCALLS_H + +#include + +#include +#include + + +#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS + +extern void syscall_regfunc(void); +extern void syscall_unregfunc(void); + +TRACE_EVENT_FN(sys_enter, + + TP_PROTO(struct pt_regs *regs, long id), + + TP_ARGS(regs, id), + + TP_STRUCT__entry( + __field( long, id ) + __array( unsigned long, args, 6 ) + ), + + TP_fast_assign( + __entry->id = id; + syscall_get_arguments(current, regs, 0, 6, __entry->args); + ), + + TP_printk("NR %ld (%lx, %lx, %lx, %lx, %lx, %lx)", + __entry->id, + __entry->args[0], __entry->args[1], __entry->args[2], + __entry->args[3], __entry->args[4], __entry->args[5]), + + syscall_regfunc, syscall_unregfunc +); + +TRACE_EVENT_FN(sys_exit, + + TP_PROTO(struct pt_regs *regs, long ret), + + TP_ARGS(regs, ret), + + TP_STRUCT__entry( + __field( long, id ) + __field( long, ret ) + ), + + TP_fast_assign( + __entry->id = syscall_get_nr(current, regs); + __entry->ret = ret; + ), + + TP_printk("NR %ld = %ld", + __entry->id, __entry->ret), + + syscall_regfunc, syscall_unregfunc +); + +#endif /* CONFIG_HAVE_SYSCALL_TRACEPOINTS */ + +#endif /* _TRACE_EVENTS_SYSCALLS_H */ + +/* This part must be outside protection */ +#include + diff --git a/include/trace/syscall.h b/include/trace/syscall.h index 4e1943001854..5dc283ba5ae0 100644 --- a/include/trace/syscall.h +++ b/include/trace/syscall.h @@ -8,23 +8,6 @@ #include -#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS - -extern void syscall_regfunc(void); -extern void syscall_unregfunc(void); - -DECLARE_TRACE(syscall_enter, - TP_PROTO(struct pt_regs *regs, long id), - TP_ARGS(regs, id) -); - -DECLARE_TRACE(syscall_exit, - TP_PROTO(struct pt_regs *regs, long ret), - TP_ARGS(regs, ret) -); - -#endif - /* * A syscall entry in the ftrace syscalls array. * diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c index 46c1b977a2cb..2698fe401ebd 100644 --- a/kernel/trace/trace_syscalls.c +++ b/kernel/trace/trace_syscalls.c @@ -1,4 +1,5 @@ #include +#include #include #include #include @@ -286,7 +287,7 @@ int reg_event_syscall_enter(void *ptr) return -ENOSYS; mutex_lock(&syscall_trace_lock); if (!sys_refcount_enter) - ret = register_trace_syscall_enter(ftrace_syscall_enter); + ret = register_trace_sys_enter(ftrace_syscall_enter); if (ret) { pr_info("event trace: Could not activate" "syscall entry trace point"); @@ -311,7 +312,7 @@ void unreg_event_syscall_enter(void *ptr) sys_refcount_enter--; clear_bit(num, enabled_enter_syscalls); if (!sys_refcount_enter) - unregister_trace_syscall_enter(ftrace_syscall_enter); + unregister_trace_sys_enter(ftrace_syscall_enter); mutex_unlock(&syscall_trace_lock); } @@ -327,7 +328,7 @@ int reg_event_syscall_exit(void *ptr) return -ENOSYS; mutex_lock(&syscall_trace_lock); if (!sys_refcount_exit) - ret = register_trace_syscall_exit(ftrace_syscall_exit); + ret = register_trace_sys_exit(ftrace_syscall_exit); if (ret) { pr_info("event trace: Could not activate" "syscall exit trace point"); @@ -352,7 +353,7 @@ void unreg_event_syscall_exit(void *ptr) sys_refcount_exit--; clear_bit(num, enabled_exit_syscalls); if (!sys_refcount_exit) - unregister_trace_syscall_exit(ftrace_syscall_exit); + unregister_trace_sys_exit(ftrace_syscall_exit); mutex_unlock(&syscall_trace_lock); } @@ -418,7 +419,7 @@ int reg_prof_syscall_enter(char *name) mutex_lock(&syscall_trace_lock); if (!sys_prof_refcount_enter) - ret = register_trace_syscall_enter(prof_syscall_enter); + ret = register_trace_sys_enter(prof_syscall_enter); if (ret) { pr_info("event trace: Could not activate" "syscall entry trace point"); @@ -442,7 +443,7 @@ void unreg_prof_syscall_enter(char *name) sys_prof_refcount_enter--; clear_bit(num, enabled_prof_enter_syscalls); if (!sys_prof_refcount_enter) - unregister_trace_syscall_enter(prof_syscall_enter); + unregister_trace_sys_enter(prof_syscall_enter); mutex_unlock(&syscall_trace_lock); } @@ -479,7 +480,7 @@ int reg_prof_syscall_exit(char *name) mutex_lock(&syscall_trace_lock); if (!sys_prof_refcount_exit) - ret = register_trace_syscall_exit(prof_syscall_exit); + ret = register_trace_sys_exit(prof_syscall_exit); if (ret) { pr_info("event trace: Could not activate" "syscall entry trace point"); @@ -503,7 +504,7 @@ void unreg_prof_syscall_exit(char *name) sys_prof_refcount_exit--; clear_bit(num, enabled_prof_exit_syscalls); if (!sys_prof_refcount_exit) - unregister_trace_syscall_exit(prof_syscall_exit); + unregister_trace_sys_exit(prof_syscall_exit); mutex_unlock(&syscall_trace_lock); }