77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/*
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* Bare bones profiler showing how a profiler module should be structured.
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*
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* Compilation:
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* - Linux: gcc -fPIC -shared -o libmono-profiler-sample.so sample.c `pkg-config --cflags mono-2`
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* - OS X: clang -undefined suppress -flat_namespace -o mono-profiler-sample.dylib sample.c `pkg-config --cflags mono-2`
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*
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* If you're using a custom prefix for your Mono installation (e.g. /opt/mono),
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* pkg-config must be invoked like this: PKG_CONFIG_PATH=/opt/mono pkg-config --cflags mono-2
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*
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* Install the resulting shared library where the dynamic loader can find it,
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* e.g. /usr/local/lib or /opt/mono (custom prefix).
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*
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* To use the module: mono --profile=sample hello.exe
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*/
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#include <mono/metadata/profiler.h>
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/*
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* Defining a type called _MonoProfiler will complete the opaque MonoProfiler
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* type, which is used throughout the profiler API.
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*/
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struct _MonoProfiler {
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/* Handle obtained from mono_profiler_create (). */
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MonoProfilerHandle handle;
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/* Counts the number of calls observed. */
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unsigned long long ncalls;
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};
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/*
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* Use static storage for the profiler structure for simplicity. The structure
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* can be allocated dynamically as well, if needed.
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*/
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static MonoProfiler profiler;
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/*
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* Callback invoked after the runtime finishes shutting down. Managed code can
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* no longer run and most runtime services are unavailable.
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*/
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static void
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sample_shutdown_end (MonoProfiler *prof)
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{
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printf ("Total number of calls: %llu\n", prof->ncalls);
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}
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/*
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* Method enter callback invoked on entry to all instrumented methods.
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*/
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static void
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sample_method_enter (MonoProfiler *prof, MonoMethod *method, MonoProfilerCallContext *ctx)
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{
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prof->ncalls++;
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}
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/*
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* Filter callback that decides which methods to instrument and how.
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*/
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static MonoProfilerCallInstrumentationFlags
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sample_call_instrumentation_filter (MonoProfiler *prof, MonoMethod *method)
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{
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return MONO_PROFILER_CALL_INSTRUMENTATION_ENTER;
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}
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/*
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* The entry point function invoked by the Mono runtime.
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*/
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void
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mono_profiler_init_sample (const char *desc)
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{
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profiler.handle = mono_profiler_create (&profiler);
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mono_profiler_set_runtime_shutdown_end_callback (profiler.handle, sample_shutdown_end);
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mono_profiler_set_call_instrumentation_filter_callback (profiler.handle, sample_call_instrumentation_filter);
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mono_profiler_set_method_enter_callback (profiler.handle, sample_method_enter);
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}
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