[profile] add runtime variable documentation
llvm-svn: 269964
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@ -154,4 +154,33 @@ uint64_t __llvm_profile_get_version(void);
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uint64_t __llvm_profile_get_data_size(const __llvm_profile_data *Begin,
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uint64_t __llvm_profile_get_data_size(const __llvm_profile_data *Begin,
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const __llvm_profile_data *End);
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const __llvm_profile_data *End);
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/*!
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* This variable is defined in InstrProfilingRuntime.c as a hidden
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* symbol. Its main purpose is to enable profile runtime user to
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* bypass runtime initialization code -- if the client code explicitly
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* define this variable, then InstProfileRuntime.o won't be linked in.
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* Note that this variable's visibility needs to be hidden so that the
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* definition of this variable in an instrumented shared library won't
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* affect runtime initialization decision of the main program.
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*/
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COMPILER_RT_VISIBILITY extern int __llvm_profile_runtime;
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/*!
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* This variable is defined in InstrProfilingFile.c. Its visibility is
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* not hidden so that instrumented shared libraries and the main program
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* can share the raw data file with the same name.
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*/
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extern int __llvm_profile_OwnsFilename;
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extern const char *__llvm_profile_CurrentFilename;
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/*!
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* This variable is defined in InstrProfiling.c. Its main purpose is to
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* encode the raw profile version value and other format related information
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* such as whether the profile is from IR based instrumentation. The variable
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* is defined as weak so that compiler can emit an overriding definition
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* depending on user option. Since we don't support mixing FE and IR based
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* data in the same raw profile data file (in other words, shared libs and
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* main program are expected to be instrumented in the same way), there is
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* no need for this variale to be hidden.
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*/
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extern uint64_t __llvm_profile_raw_version;
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#endif /* PROFILE_INSTRPROFILING_H_ */
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#endif /* PROFILE_INSTRPROFILING_H_ */
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