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Fix: Support 4.x kernel versions in Makefile
[lttng-modules.git] / lttng-syscalls.c
diff --git a/lttng-syscalls.c b/lttng-syscalls.c
index 748c6002fc4a79ef3d2692bf997ac0820e60cbc2..f46fd91ae265e882a8a1c2b6d10558e02d5e0db7 100644 (file)
--- a/lttng-syscalls.c
+++ b/lttng-syscalls.c
@@ -113,16 +113,15 @@ struct mmap_arg_struct;
 /* Hijack probe callback for system call enter */
 #undef TP_PROBE_CB
 #define TP_PROBE_CB(_template)         &syscall_entry_probe
-#define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _struct, _assign, _printk) \
+#define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \
        LTTNG_TRACEPOINT_EVENT(syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \
-               PARAMS(_struct), PARAMS(_assign), PARAMS(_printk))
-#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code, _struct, _assign, _printk) \
+               PARAMS(_fields))
+#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code, _fields) \
        LTTNG_TRACEPOINT_EVENT_CODE(syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \
                PARAMS(_locvar), PARAMS(_code),                                 \
-               PARAMS(_struct), PARAMS(_assign), PARAMS(_printk))
-#define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _struct, _assign, _printk) \
-       LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(syscall_entry_##_name, PARAMS(_struct), PARAMS(_assign), \
-               PARAMS(_printk))
+               PARAMS(_fields))
+#define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \
+       LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(syscall_entry_##_name, PARAMS(_fields))
 #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name)            \
        LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(syscall_entry_##_template, syscall_entry_##_name)
 #undef TRACE_SYSTEM
@@ -146,17 +145,14 @@ struct mmap_arg_struct;
 
 /* Hijack probe callback for compat system call enter */
 #define TP_PROBE_CB(_template)         &syscall_entry_probe
-#define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _struct, _assign, _printk) \
+#define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \
        LTTNG_TRACEPOINT_EVENT(compat_syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \
-               PARAMS(_struct), PARAMS(_assign),                               \
-               PARAMS(_printk))
-#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code, _struct, _assign, _printk) \
+               PARAMS(_fields))
+#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code, _fields) \
        LTTNG_TRACEPOINT_EVENT_CODE(compat_syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \
-               PARAMS(_locvar), PARAMS(_code),                                 \
-               PARAMS(_struct), PARAMS(_assign), PARAMS(_printk))
-#define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _struct, _assign, _printk) \
-       LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(compat_syscall_entry_##_name, PARAMS(_struct), \
-               PARAMS(_assign), PARAMS(_printk))
+               PARAMS(_locvar), PARAMS(_code), PARAMS(_fields))
+#define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \
+       LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(compat_syscall_entry_##_name, PARAMS(_fields))
 #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name)            \
        LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(compat_syscall_entry_##_template, \
                compat_syscall_entry_##_name)
@@ -193,16 +189,14 @@ struct mmap_arg_struct;
 
 /* Hijack probe callback for system call exit */
 #define TP_PROBE_CB(_template)         &syscall_exit_probe
-#define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _struct, _assign, _printk) \
+#define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \
        LTTNG_TRACEPOINT_EVENT(syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \
-               PARAMS(_struct), PARAMS(_assign), PARAMS(_printk))
-#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code, _struct, _assign, _printk) \
+               PARAMS(_fields))
+#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code, _fields) \
        LTTNG_TRACEPOINT_EVENT_CODE(syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \
-               PARAMS(_locvar), PARAMS(_code),                                 \
-               PARAMS(_struct), PARAMS(_assign), PARAMS(_printk))
-#define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _struct, _assign, _printk) \
-       LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(syscall_exit_##_name, PARAMS(_struct), \
-               PARAMS(_assign), PARAMS(_printk))
+               PARAMS(_locvar), PARAMS(_code), PARAMS(_fields))
+#define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \
+       LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(syscall_exit_##_name, PARAMS(_fields))
 #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name)            \
        LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(syscall_exit_##_template,        \
                syscall_exit_##_name)
@@ -227,16 +221,14 @@ struct mmap_arg_struct;
 
 /* Hijack probe callback for compat system call exit */
 #define TP_PROBE_CB(_template)         &syscall_exit_probe
-#define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _struct, _assign, _printk) \
+#define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \
        LTTNG_TRACEPOINT_EVENT(compat_syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \
-               PARAMS(_struct), PARAMS(_assign), PARAMS(_printk))
-#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code, _struct, _assign, _printk) \
+               PARAMS(_fields))
+#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code, _fields) \
        LTTNG_TRACEPOINT_EVENT_CODE(compat_syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \
-               PARAMS(_locvar), PARAMS(_code),                                 \
-               PARAMS(_struct), PARAMS(_assign), PARAMS(_printk))
-#define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _struct, _assign, _printk) \
-       LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(compat_syscall_exit_##_name, PARAMS(_struct), \
-               PARAMS(_assign), PARAMS(_printk))
+               PARAMS(_locvar), PARAMS(_code), PARAMS(_fields))
+#define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \
+       LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(compat_syscall_exit_##_name, PARAMS(_fields))
 #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name)            \
        LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(compat_syscall_exit_##_template, \
                compat_syscall_exit_##_name)
@@ -666,7 +658,10 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret)
        }
 }
 
-/* noinline to diminish caller stack size */
+/*
+ * noinline to diminish caller stack size.
+ * Should be called with sessions lock held.
+ */
 static
 int fill_table(const struct trace_syscall_entry *table, size_t table_len,
        struct lttng_event **chan_table, struct lttng_channel *chan,
@@ -715,9 +710,9 @@ int fill_table(const struct trace_syscall_entry *table, size_t table_len,
                strncat(ev.name, desc->name,
                        LTTNG_KERNEL_SYM_NAME_LEN - strlen(ev.name) - 1);
                ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
-               ev.instrumentation = LTTNG_KERNEL_NOOP;
-               chan_table[i] = lttng_event_create(chan, &ev, filter,
-                                               desc);
+               ev.instrumentation = LTTNG_KERNEL_SYSCALL;
+               chan_table[i] = _lttng_event_create(chan, &ev, filter,
+                                               desc, ev.instrumentation);
                WARN_ON_ONCE(!chan_table[i]);
                if (IS_ERR(chan_table[i])) {
                        /*
@@ -732,6 +727,9 @@ int fill_table(const struct trace_syscall_entry *table, size_t table_len,
        return 0;
 }
 
+/*
+ * Should be called with sessions lock held.
+ */
 int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
 {
        struct lttng_kernel_event ev;
@@ -779,9 +777,10 @@ int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
                memset(&ev, 0, sizeof(ev));
                strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN);
                ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
-               ev.instrumentation = LTTNG_KERNEL_NOOP;
-               chan->sc_unknown = lttng_event_create(chan, &ev, filter,
-                                                   desc);
+               ev.instrumentation = LTTNG_KERNEL_SYSCALL;
+               chan->sc_unknown = _lttng_event_create(chan, &ev, filter,
+                                               desc,
+                                               ev.instrumentation);
                WARN_ON_ONCE(!chan->sc_unknown);
                if (IS_ERR(chan->sc_unknown)) {
                        return PTR_ERR(chan->sc_unknown);
@@ -795,9 +794,10 @@ int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
                memset(&ev, 0, sizeof(ev));
                strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN);
                ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
-               ev.instrumentation = LTTNG_KERNEL_NOOP;
-               chan->sc_compat_unknown = lttng_event_create(chan, &ev, filter,
-                                                          desc);
+               ev.instrumentation = LTTNG_KERNEL_SYSCALL;
+               chan->sc_compat_unknown = _lttng_event_create(chan, &ev, filter,
+                                               desc,
+                                               ev.instrumentation);
                WARN_ON_ONCE(!chan->sc_unknown);
                if (IS_ERR(chan->sc_compat_unknown)) {
                        return PTR_ERR(chan->sc_compat_unknown);
@@ -811,9 +811,10 @@ int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
                memset(&ev, 0, sizeof(ev));
                strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN);
                ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
-               ev.instrumentation = LTTNG_KERNEL_NOOP;
-               chan->compat_sc_exit_unknown = lttng_event_create(chan, &ev,
-                                               filter, desc);
+               ev.instrumentation = LTTNG_KERNEL_SYSCALL;
+               chan->compat_sc_exit_unknown = _lttng_event_create(chan, &ev,
+                                               filter, desc,
+                                               ev.instrumentation);
                WARN_ON_ONCE(!chan->compat_sc_exit_unknown);
                if (IS_ERR(chan->compat_sc_exit_unknown)) {
                        return PTR_ERR(chan->compat_sc_exit_unknown);
@@ -827,9 +828,9 @@ int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
                memset(&ev, 0, sizeof(ev));
                strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN);
                ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
-               ev.instrumentation = LTTNG_KERNEL_NOOP;
-               chan->sc_exit_unknown = lttng_event_create(chan, &ev, filter,
-                                                desc);
+               ev.instrumentation = LTTNG_KERNEL_SYSCALL;
+               chan->sc_exit_unknown = _lttng_event_create(chan, &ev, filter,
+                                               desc, ev.instrumentation);
                WARN_ON_ONCE(!chan->sc_exit_unknown);
                if (IS_ERR(chan->sc_exit_unknown)) {
                        return PTR_ERR(chan->sc_exit_unknown);
LTTng 2.0/0.x modules
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