From: Chris Lattner Date: Tue, 28 Oct 2003 20:13:07 +0000 (+0000) Subject: Read in the bytecode and profile information, but don't do anything with X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e436779c5a275e98a488b9ddbceada223f238a8b;p=oota-llvm.git Read in the bytecode and profile information, but don't do anything with it yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9556 91177308-0d34-0410-b5e6-96231b3b80d8 --- diff --git a/tools/llvm-prof/ProfileInfo.cpp b/tools/llvm-prof/ProfileInfo.cpp new file mode 100644 index 00000000000..acafdfb3eb8 --- /dev/null +++ b/tools/llvm-prof/ProfileInfo.cpp @@ -0,0 +1,132 @@ +//===- ProfileInfo.cpp - Represents profile information -------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file was developed by the LLVM research group and is distributed under +// the University of Illinois Open Source License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// The ProfileInfo class is used to represent profiling information read in from +// the dump file. +// +//===----------------------------------------------------------------------===// + +#include "ProfileInfo.h" +#include +#include +#include +#include +#include + +enum ProfilingType { + Arguments = 1, // The command line argument block + Function = 2, // Function profiling information + Block = 3, // Block profiling information +}; + +// ByteSwap - Byteswap 'Var' if 'Really' is true. +// +static inline unsigned ByteSwap(unsigned Var, bool Really) { + if (!Really) return Var; + return ((Var & (255<< 0)) << 24) | + ((Var & (255<< 8)) << 8) | + ((Var & (255<<16)) >> 8) | + ((Var & (255<<24)) >> 24); +} + +static void ReadProfilingBlock(const char *ToolName, FILE *F, + bool ShouldByteSwap, + std::vector &Data) { + // Read the number of entries... + unsigned NumEntries; + if (fread(&NumEntries, sizeof(unsigned), 1, F) != 1) { + std::cerr << ToolName << ": data packet truncated!\n"; + perror(0); + exit(1); + } + NumEntries = ByteSwap(NumEntries, ShouldByteSwap); + + // Read the counts... + std::vector TempSpace(NumEntries); + + // Read in the block of data... + if (fread(&TempSpace[0], sizeof(unsigned)*NumEntries, 1, F) != 1) { + std::cerr << ToolName << ": data packet truncated!\n"; + perror(0); + exit(1); + } + + // Make sure we have enough space... + if (Data.size() < NumEntries) + Data.resize(NumEntries); + + // Accumulate the data we just read into the data. + if (!ShouldByteSwap) { + for (unsigned i = 0; i != NumEntries; ++i) + Data[i] += TempSpace[i]; + } else { + for (unsigned i = 0; i != NumEntries; ++i) + Data[i] += ByteSwap(TempSpace[i], true); + } +} + +// ProfileInfo ctor - Read the specified profiling data file, exiting the +// program if the file is invalid or broken. +// +ProfileInfo::ProfileInfo(const char *ToolName, const std::string &Filename) { + FILE *F = fopen(Filename.c_str(), "r"); + if (F == 0) { + std::cerr << ToolName << ": Error opening '" << Filename << ": "; + perror(0); + exit(1); + } + + // Keep reading packets until we run out of them. + unsigned PacketType; + while (fread(&PacketType, sizeof(unsigned), 1, F) == 1) { + // If the low eight bits of the packet are zero, we must be dealing with an + // endianness mismatch. Byteswap all words read from the profiling + // information. + bool ShouldByteSwap = (char)PacketType == 0; + PacketType = ByteSwap(PacketType, ShouldByteSwap); + + switch (PacketType) { + case Arguments: { + unsigned ArgLength; + if (fread(&ArgLength, sizeof(unsigned), 1, F) != 1) { + std::cerr << ToolName << ": arguments packet truncated!\n"; + perror(0); + exit(1); + } + ArgLength = ByteSwap(ArgLength, ShouldByteSwap); + + // Read in the arguments... + std::vector Chars(ArgLength+4); + + if (ArgLength) + if (fread(&Chars[0], (ArgLength+3) & ~3, 1, F) != 1) { + std::cerr << ToolName << ": arguments packet truncated!\n"; + perror(0); + exit(1); + } + CommandLines.push_back(std::string(&Chars[0], &Chars[ArgLength])); + break; + } + + case Function: + ReadProfilingBlock(ToolName, F, ShouldByteSwap, FunctionCounts); + break; + + case Block: + ReadProfilingBlock(ToolName, F, ShouldByteSwap, BlockCounts); + break; + + default: + std::cerr << ToolName << ": Unknown packet type #" << PacketType << "!\n"; + exit(1); + } + } + + fclose(F); +} diff --git a/tools/llvm-prof/ProfileInfo.h b/tools/llvm-prof/ProfileInfo.h new file mode 100644 index 00000000000..8f823aadaba --- /dev/null +++ b/tools/llvm-prof/ProfileInfo.h @@ -0,0 +1,31 @@ +//===- ProfileInfo.h - Represents profile information -----------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file was developed by the LLVM research group and is distributed under +// the University of Illinois Open Source License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// The ProfileInfo class is used to represent profiling information read in from +// the dump file. +// +//===----------------------------------------------------------------------===// + +#ifndef PROFILEINFO_H +#define PROFILEINFO_H + +#include +#include + +class ProfileInfo { + std::vector CommandLines; + std::vector FunctionCounts; + std::vector BlockCounts; +public: + // ProfileInfo ctor - Read the specified profiling data file, exiting the + // program if the file is invalid or broken. + ProfileInfo(const char *ToolName, const std::string &Filename); +}; + +#endif diff --git a/tools/llvm-prof/llvm-prof.cpp b/tools/llvm-prof/llvm-prof.cpp index 0d5778ae517..e527cfecaee 100644 --- a/tools/llvm-prof/llvm-prof.cpp +++ b/tools/llvm-prof/llvm-prof.cpp @@ -13,8 +13,10 @@ // //===----------------------------------------------------------------------===// +#include "ProfileInfo.h" #include "llvm/Bytecode/Reader.h" #include "Support/CommandLine.h" +#include namespace { cl::opt @@ -28,9 +30,18 @@ namespace { int main(int argc, char **argv) { cl::ParseCommandLineOptions(argc, argv, " llvm profile dump decoder\n"); - + // Read in the bytecode file... + std::string ErrorMessage; + Module *Result = ParseBytecodeFile(BytecodeFile, &ErrorMessage); + if (Result == 0) { + std::cerr << argv[0] << ": " << BytecodeFile << ": " << ErrorMessage + << "\n"; + return 1; + } + // Read the profiling information + ProfileInfo PI(argv[0], ProfileDataFile); return 0; }