da0de8a237
Currently we register instrumentation data at runtime to determine the bounds of the sections where the data lives. Soon we'll implement platform-specific linker magic to determine this at link time. Move this logic to a separate file, so that our build system can choose the correct platform-specific code. No functionality change intended. <rdar://problem/15943240> llvm-svn: 204299
60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
/*===- InstrProfilingDefault.c - Profile data default platfrom ------------===*\
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|*
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|* The LLVM Compiler Infrastructure
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|*
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|* This file is distributed under the University of Illinois Open Source
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|* License. See LICENSE.TXT for details.
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|*
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\*===----------------------------------------------------------------------===*/
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#include "InstrProfiling.h"
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static const __llvm_pgo_data *DataFirst = NULL;
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static const __llvm_pgo_data *DataLast = NULL;
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static const char *NamesFirst = NULL;
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static const char *NamesLast = NULL;
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static const uint64_t *CountersFirst = NULL;
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static const uint64_t *CountersLast = NULL;
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/*!
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* \brief Register an instrumented function.
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*
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* Calls to this are emitted by clang with -fprofile-instr-generate. Such
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* calls are only required (and only emitted) on targets where we haven't
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* implemented linker magic to find the bounds of the sections.
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*/
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void __llvm_pgo_register_function(void *Data_) {
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/* TODO: Only emit this function if we can't use linker magic. */
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const __llvm_pgo_data *Data = (__llvm_pgo_data*)Data_;
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if (!DataFirst) {
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DataFirst = Data;
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DataLast = Data + 1;
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NamesFirst = Data->Name;
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NamesLast = Data->Name + Data->NameSize;
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CountersFirst = Data->Counters;
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CountersLast = Data->Counters + Data->NumCounters;
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return;
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}
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#define UPDATE_FIRST(First, New) \
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First = New < First ? New : First
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UPDATE_FIRST(DataFirst, Data);
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UPDATE_FIRST(NamesFirst, Data->Name);
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UPDATE_FIRST(CountersFirst, Data->Counters);
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#undef UPDATE_FIRST
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#define UPDATE_LAST(Last, New) \
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Last = New > Last ? New : Last
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UPDATE_LAST(DataLast, Data + 1);
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UPDATE_LAST(NamesLast, Data->Name + Data->NameSize);
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UPDATE_LAST(CountersLast, Data->Counters + Data->NumCounters);
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#undef UPDATE_LAST
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}
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const __llvm_pgo_data *__llvm_pgo_data_begin() { return DataFirst; }
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const __llvm_pgo_data *__llvm_pgo_data_end() { return DataLast; }
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const char *__llvm_pgo_names_begin() { return NamesFirst; }
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const char *__llvm_pgo_names_end() { return NamesLast; }
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const uint64_t *__llvm_pgo_counters_begin() { return CountersFirst; }
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const uint64_t *__llvm_pgo_counters_end() { return CountersLast; }
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