Kernel+LibC: Add support for filtering profiling events

This adds the -t command-line argument for the profile tool. Using this
argument you can filter which event types you want in your profile.

2 files changed, 16 insertions, 14 deletions

diff --git a/Userland/Libraries/LibC/serenity.cpp b/Userland/Libraries/LibC/serenity.cpp
index 1b59675dd7..0f112ca0ae 100644
--- a/Userland/Libraries/LibC/serenity.cpp
+++ b/Userland/Libraries/LibC/serenity.cpp
@@ -30,9 +30,9 @@ int module_unload(const char* name, size_t name_length)
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
-int profiling_enable(pid_t pid)
+int profiling_enable(pid_t pid, uint64_t event_mask)
 {
-    int rc = syscall(SC_profiling_enable, pid);
+    int rc = syscall(SC_profiling_enable, pid, event_mask);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
diff --git a/Userland/Libraries/LibC/serenity.h b/Userland/Libraries/LibC/serenity.h
index 72282cf449..acc94f6b40 100644
--- a/Userland/Libraries/LibC/serenity.h
+++ b/Userland/Libraries/LibC/serenity.h
@@ -17,7 +17,7 @@ int disown(pid_t);
 int module_load(const char* path, size_t path_length);
 int module_unload(const char* name, size_t name_length);
 
-int profiling_enable(pid_t);
+int profiling_enable(pid_t, uint64_t);
 int profiling_disable(pid_t);
 int profiling_free_buffer(pid_t);
 
@@ -76,19 +76,21 @@ int futex(uint32_t* userspace_address, int futex_op, uint32_t value, const struc
 int purge(int mode);
 
 enum {
-    PERF_EVENT_SAMPLE,
-    PERF_EVENT_MALLOC,
-    PERF_EVENT_FREE,
-    PERF_EVENT_MMAP,
-    PERF_EVENT_MUNMAP,
-    PERF_EVENT_PROCESS_CREATE,
-    PERF_EVENT_PROCESS_EXEC,
-    PERF_EVENT_PROCESS_EXIT,
-    PERF_EVENT_THREAD_CREATE,
-    PERF_EVENT_THREAD_EXIT,
-    PERF_EVENT_CONTEXT_SWITCH,
+    PERF_EVENT_SAMPLE = 1,
+    PERF_EVENT_MALLOC = 2,
+    PERF_EVENT_FREE = 4,
+    PERF_EVENT_MMAP = 8,
+    PERF_EVENT_MUNMAP = 16,
+    PERF_EVENT_PROCESS_CREATE = 32,
+    PERF_EVENT_PROCESS_EXEC = 64,
+    PERF_EVENT_PROCESS_EXIT = 128,
+    PERF_EVENT_THREAD_CREATE = 256,
+    PERF_EVENT_THREAD_EXIT = 512,
+    PERF_EVENT_CONTEXT_SWITCH = 1024,
 };
 
+#define PERF_EVENT_MASK_ALL (~0ull)
+
 int perf_event(int type, uintptr_t arg1, uintptr_t arg2);
 
 int get_stack_bounds(uintptr_t* user_stack_base, size_t* user_stack_size);