Xhy's Blog

Reverse and Think

0%

Mono RuntimeMethodHandle GetFunctionPointer 源码分析

发表于

总结

最终调用mono_jit_compile_method_with_opt，使用JIT对方法进行编译优化，返回JIT方法指针。

源码

CSharp函数声明

RuntimeMethodHandle.cs#L81

1
2
3
4
5
6
7
[MethodImpl (MethodImplOptions.InternalCall)]
static extern IntPtr GetFunctionPointer (IntPtr m);

public IntPtr GetFunctionPointer ()
{
    return GetFunctionPointer (value);
}

声明为MethodImplOptions.InternalCall

声明

icall-def-netcore.h#L387

1
HANDLES(MHAN_1, "GetFunctionPointer", ves_icall_RuntimeMethodHandle_GetFunctionPointer, gpointer, 1, (MonoMethod_ptr))

实现

icall.c#L7768

1
2
3
4
5
gpointer
ves_icall_RuntimeMethodHandle_GetFunctionPointer (MonoMethod *method, MonoError *error)
{
	return mono_compile_method_checked (method, error);
}

mono_compile_method_checked

声明

object-internals.h#L2128

1
2
void* 
mono_compile_method_checked (MonoMethod *method, MonoError *error);

实现

object.c#L797

1
2
3
4
5
6
7
8
9
10
11
12
13
gpointer
mono_compile_method_checked (MonoMethod *method, MonoError *error)
{
	gpointer res;

	MONO_REQ_GC_NEUTRAL_MODE

	error_init (error);

	g_assert (callbacks.compile_method);
	res = callbacks.compile_method (method, error);
	return res;
}

callbacks.compile_method

mini-runtime.c#L4445

1
2
#ifdef JIT_TRAMPOLINES_WORK
	callbacks.compile_method = mono_jit_compile_method;

mono_jit_compile_method

mini-runtime.c#L2755

1
2
3
4
5
6
7
8
gpointer
mono_jit_compile_method (MonoMethod *method, MonoError *error)
{
	gpointer code;

	code = mono_jit_compile_method_with_opt (method, mono_get_optimizations_for_method (method, default_opt), FALSE, error);
	return code;
}