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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Error.h>
#include <Kernel/KBuffer.h>
namespace Kernel {
class KBufferBuilder;
struct RegisterState;
struct [[gnu::packed]] MallocPerformanceEvent {
size_t size;
FlatPtr ptr;
};
struct [[gnu::packed]] FreePerformanceEvent {
size_t size;
FlatPtr ptr;
};
struct [[gnu::packed]] MmapPerformanceEvent {
size_t size;
FlatPtr ptr;
char name[64];
};
struct [[gnu::packed]] MunmapPerformanceEvent {
size_t size;
FlatPtr ptr;
};
struct [[gnu::packed]] ProcessCreatePerformanceEvent {
pid_t parent_pid;
char executable[64];
};
struct [[gnu::packed]] ProcessExecPerformanceEvent {
char executable[64];
};
struct [[gnu::packed]] ThreadCreatePerformanceEvent {
pid_t parent_tid;
};
struct [[gnu::packed]] ContextSwitchPerformanceEvent {
pid_t next_pid;
u32 next_tid;
};
struct [[gnu::packed]] KMallocPerformanceEvent {
size_t size;
FlatPtr ptr;
};
struct [[gnu::packed]] KFreePerformanceEvent {
size_t size;
FlatPtr ptr;
};
struct [[gnu::packed]] SignpostPerformanceEvent {
FlatPtr arg1;
FlatPtr arg2;
};
struct [[gnu::packed]] PerformanceEvent {
u16 type { 0 };
u8 stack_size { 0 };
u32 pid { 0 };
u32 tid { 0 };
u64 timestamp;
u32 lost_samples;
union {
MallocPerformanceEvent malloc;
FreePerformanceEvent free;
MmapPerformanceEvent mmap;
MunmapPerformanceEvent munmap;
ProcessCreatePerformanceEvent process_create;
ProcessExecPerformanceEvent process_exec;
ThreadCreatePerformanceEvent thread_create;
ContextSwitchPerformanceEvent context_switch;
KMallocPerformanceEvent kmalloc;
KFreePerformanceEvent kfree;
SignpostPerformanceEvent signpost;
} data;
static constexpr size_t max_stack_frame_count = 64;
FlatPtr stack[max_stack_frame_count];
};
enum class ProcessEventType {
Create,
Exec
};
class PerformanceEventBuffer {
public:
static OwnPtr<PerformanceEventBuffer> try_create_with_size(size_t buffer_size);
ErrorOr<void> append(int type, FlatPtr arg1, FlatPtr arg2, const StringView& arg3, Thread* current_thread = Thread::current());
ErrorOr<void> append_with_ip_and_bp(ProcessID pid, ThreadID tid, FlatPtr eip, FlatPtr ebp,
int type, u32 lost_samples, FlatPtr arg1, FlatPtr arg2, const StringView& arg3);
ErrorOr<void> append_with_ip_and_bp(ProcessID pid, ThreadID tid, const RegisterState& regs,
int type, u32 lost_samples, FlatPtr arg1, FlatPtr arg2, const StringView& arg3);
void clear()
{
m_count = 0;
}
size_t capacity() const { return m_buffer->size() / sizeof(PerformanceEvent); }
size_t count() const { return m_count; }
const PerformanceEvent& at(size_t index) const
{
return const_cast<PerformanceEventBuffer&>(*this).at(index);
}
ErrorOr<void> to_json(KBufferBuilder&) const;
void add_process(const Process&, ProcessEventType event_type);
ErrorOr<FlatPtr> register_string(NonnullOwnPtr<KString>);
private:
explicit PerformanceEventBuffer(NonnullOwnPtr<KBuffer>);
template<typename Serializer>
ErrorOr<void> to_json_impl(Serializer&) const;
PerformanceEvent& at(size_t index);
size_t m_count { 0 };
NonnullOwnPtr<KBuffer> m_buffer;
HashTable<NonnullOwnPtr<KString>> m_strings;
};
extern bool g_profiling_all_threads;
extern PerformanceEventBuffer* g_global_perf_events;
extern u64 g_profiling_event_mask;
}
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