[libjulia-codegen] export jl_jit_total_bytes (#43086)

Author: inkydragon

doc/src/base/base.md

@@ -444,6 +444,7 @@ Base.@macroexpand1
 Base.code_lowered
 Base.code_typed
 Base.precompile
+Base.jit_total_bytes
 ```
 
 ## Meta

src/codegen-stubs.c

@@ -61,6 +61,11 @@ JL_DLLEXPORT void jl_teardown_codegen_fallback(void)
 {
 }
 
+JL_DLLEXPORT size_t jl_jit_total_bytes_fallback(void)
+{
+    return 0;
+}
+
 JL_DLLEXPORT void jl_lock_profile_fallback(void)
 {
 }

src/jitlayers.cpp

@@ -1134,7 +1134,7 @@ void add_named_global(StringRef name, void *addr)
 }
 
 extern "C" JL_DLLEXPORT
-size_t jl_jit_total_bytes(void)
+size_t jl_jit_total_bytes_impl(void)
 {
     return jl_ExecutionEngine->getTotalBytes();
 }

src/jl_exported_funcs.inc

@@ -539,6 +539,7 @@
     YY(jl_generate_fptr_for_unspecialized) \
     YY(jl_compile_extern_c) \
     YY(jl_teardown_codegen) \
+    YY(jl_jit_total_bytes) \
     YY(jl_lock_profile) \
     YY(jl_unlock_profile) \
     YY(jl_create_native) \

test/misc.jl

@@ -1060,3 +1060,7 @@ end
 
 # issue #41656
 @test success(`$(Base.julia_cmd()) -e 'isempty(x) = true'`)
+
+@testset "Base/timing.jl" begin
+    @test Base.jit_total_bytes() >= 0
+end