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Owning the buffer is somewhat inflexible. Some Binaries have sub Binaries (like Archive) and we had to create dummy buffers just to handle that. It is also a bad fit for IRObjectFile where the Module wants to own the buffer too. Keeping this ownership would make supporting IR inside native objects particularly painful. This patch focuses in lib/Object. If something elsewhere used to own an Binary, now it also owns a MemoryBuffer. This patch introduces a few new types. * MemoryBufferRef. This is just a pair of StringRefs for the data and name. This is to MemoryBuffer as StringRef is to std::string. * OwningBinary. A combination of Binary and a MemoryBuffer. This is needed for convenience functions that take a filename and return both the buffer and the Binary using that buffer. The C api now uses OwningBinary to avoid any change in semantics. I will start a new thread to see if we want to change it and how. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216002 91177308-0d34-0410-b5e6-96231b3b80d8
972 lines
30 KiB
C++
972 lines
30 KiB
C++
//===-- llvm-ar.cpp - LLVM archive librarian utility ----------------------===//
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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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//
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// Builds up (relatively) standard unix archive files (.a) containing LLVM
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// bitcode or other files.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Object/Archive.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Errc.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/ToolOutputFile.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cstdlib>
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#include <memory>
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#if !defined(_MSC_VER) && !defined(__MINGW32__)
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#include <unistd.h>
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#else
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#include <io.h>
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#endif
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using namespace llvm;
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// The name this program was invoked as.
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static StringRef ToolName;
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static const char *TemporaryOutput;
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static int TmpArchiveFD = -1;
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// fail - Show the error message and exit.
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LLVM_ATTRIBUTE_NORETURN static void fail(Twine Error) {
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outs() << ToolName << ": " << Error << ".\n";
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if (TmpArchiveFD != -1)
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close(TmpArchiveFD);
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if (TemporaryOutput)
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sys::fs::remove(TemporaryOutput);
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exit(1);
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}
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static void failIfError(std::error_code EC, Twine Context = "") {
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if (!EC)
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return;
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std::string ContextStr = Context.str();
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if (ContextStr == "")
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fail(EC.message());
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fail(Context + ": " + EC.message());
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}
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// llvm-ar/llvm-ranlib remaining positional arguments.
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static cl::list<std::string>
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RestOfArgs(cl::Positional, cl::OneOrMore,
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cl::desc("[relpos] [count] <archive-file> [members]..."));
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std::string Options;
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// MoreHelp - Provide additional help output explaining the operations and
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// modifiers of llvm-ar. This object instructs the CommandLine library
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// to print the text of the constructor when the --help option is given.
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static cl::extrahelp MoreHelp(
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"\nOPERATIONS:\n"
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" d[NsS] - delete file(s) from the archive\n"
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" m[abiSs] - move file(s) in the archive\n"
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" p[kN] - print file(s) found in the archive\n"
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" q[ufsS] - quick append file(s) to the archive\n"
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" r[abfiuRsS] - replace or insert file(s) into the archive\n"
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" t - display contents of archive\n"
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" x[No] - extract file(s) from the archive\n"
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"\nMODIFIERS (operation specific):\n"
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" [a] - put file(s) after [relpos]\n"
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" [b] - put file(s) before [relpos] (same as [i])\n"
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" [i] - put file(s) before [relpos] (same as [b])\n"
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" [N] - use instance [count] of name\n"
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" [o] - preserve original dates\n"
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" [s] - create an archive index (cf. ranlib)\n"
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" [S] - do not build a symbol table\n"
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" [u] - update only files newer than archive contents\n"
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"\nMODIFIERS (generic):\n"
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" [c] - do not warn if the library had to be created\n"
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" [v] - be verbose about actions taken\n"
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);
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// This enumeration delineates the kinds of operations on an archive
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// that are permitted.
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enum ArchiveOperation {
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Print, ///< Print the contents of the archive
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Delete, ///< Delete the specified members
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Move, ///< Move members to end or as given by {a,b,i} modifiers
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QuickAppend, ///< Quickly append to end of archive
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ReplaceOrInsert, ///< Replace or Insert members
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DisplayTable, ///< Display the table of contents
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Extract, ///< Extract files back to file system
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CreateSymTab ///< Create a symbol table in an existing archive
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};
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// Modifiers to follow operation to vary behavior
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static bool AddAfter = false; ///< 'a' modifier
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static bool AddBefore = false; ///< 'b' modifier
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static bool Create = false; ///< 'c' modifier
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static bool OriginalDates = false; ///< 'o' modifier
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static bool OnlyUpdate = false; ///< 'u' modifier
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static bool Verbose = false; ///< 'v' modifier
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static bool Symtab = true; ///< 's' modifier
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// Relative Positional Argument (for insert/move). This variable holds
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// the name of the archive member to which the 'a', 'b' or 'i' modifier
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// refers. Only one of 'a', 'b' or 'i' can be specified so we only need
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// one variable.
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static std::string RelPos;
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// This variable holds the name of the archive file as given on the
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// command line.
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static std::string ArchiveName;
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// This variable holds the list of member files to proecess, as given
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// on the command line.
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static std::vector<std::string> Members;
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// show_help - Show the error message, the help message and exit.
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LLVM_ATTRIBUTE_NORETURN static void
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show_help(const std::string &msg) {
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errs() << ToolName << ": " << msg << "\n\n";
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cl::PrintHelpMessage();
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std::exit(1);
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}
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// getRelPos - Extract the member filename from the command line for
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// the [relpos] argument associated with a, b, and i modifiers
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static void getRelPos() {
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if(RestOfArgs.size() == 0)
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show_help("Expected [relpos] for a, b, or i modifier");
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RelPos = RestOfArgs[0];
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RestOfArgs.erase(RestOfArgs.begin());
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}
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static void getOptions() {
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if(RestOfArgs.size() == 0)
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show_help("Expected options");
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Options = RestOfArgs[0];
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RestOfArgs.erase(RestOfArgs.begin());
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}
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// getArchive - Get the archive file name from the command line
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static void getArchive() {
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if(RestOfArgs.size() == 0)
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show_help("An archive name must be specified");
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ArchiveName = RestOfArgs[0];
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RestOfArgs.erase(RestOfArgs.begin());
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}
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// getMembers - Copy over remaining items in RestOfArgs to our Members vector
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// This is just for clarity.
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static void getMembers() {
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if(RestOfArgs.size() > 0)
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Members = std::vector<std::string>(RestOfArgs);
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}
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// parseCommandLine - Parse the command line options as presented and return the
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// operation specified. Process all modifiers and check to make sure that
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// constraints on modifier/operation pairs have not been violated.
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static ArchiveOperation parseCommandLine() {
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getOptions();
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// Keep track of number of operations. We can only specify one
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// per execution.
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unsigned NumOperations = 0;
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// Keep track of the number of positional modifiers (a,b,i). Only
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// one can be specified.
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unsigned NumPositional = 0;
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// Keep track of which operation was requested
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ArchiveOperation Operation;
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bool MaybeJustCreateSymTab = false;
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for(unsigned i=0; i<Options.size(); ++i) {
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switch(Options[i]) {
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case 'd': ++NumOperations; Operation = Delete; break;
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case 'm': ++NumOperations; Operation = Move ; break;
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case 'p': ++NumOperations; Operation = Print; break;
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case 'q': ++NumOperations; Operation = QuickAppend; break;
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case 'r': ++NumOperations; Operation = ReplaceOrInsert; break;
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case 't': ++NumOperations; Operation = DisplayTable; break;
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case 'x': ++NumOperations; Operation = Extract; break;
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case 'c': Create = true; break;
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case 'l': /* accepted but unused */ break;
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case 'o': OriginalDates = true; break;
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case 's':
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Symtab = true;
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MaybeJustCreateSymTab = true;
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break;
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case 'S':
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Symtab = false;
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break;
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case 'u': OnlyUpdate = true; break;
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case 'v': Verbose = true; break;
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case 'a':
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getRelPos();
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AddAfter = true;
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NumPositional++;
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break;
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case 'b':
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getRelPos();
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AddBefore = true;
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NumPositional++;
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break;
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case 'i':
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getRelPos();
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AddBefore = true;
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NumPositional++;
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break;
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default:
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cl::PrintHelpMessage();
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}
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}
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// At this point, the next thing on the command line must be
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// the archive name.
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getArchive();
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// Everything on the command line at this point is a member.
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getMembers();
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if (NumOperations == 0 && MaybeJustCreateSymTab) {
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NumOperations = 1;
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Operation = CreateSymTab;
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if (!Members.empty())
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show_help("The s operation takes only an archive as argument");
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}
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// Perform various checks on the operation/modifier specification
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// to make sure we are dealing with a legal request.
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if (NumOperations == 0)
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show_help("You must specify at least one of the operations");
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if (NumOperations > 1)
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show_help("Only one operation may be specified");
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if (NumPositional > 1)
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show_help("You may only specify one of a, b, and i modifiers");
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if (AddAfter || AddBefore) {
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if (Operation != Move && Operation != ReplaceOrInsert)
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show_help("The 'a', 'b' and 'i' modifiers can only be specified with "
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"the 'm' or 'r' operations");
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}
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if (OriginalDates && Operation != Extract)
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show_help("The 'o' modifier is only applicable to the 'x' operation");
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if (OnlyUpdate && Operation != ReplaceOrInsert)
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show_help("The 'u' modifier is only applicable to the 'r' operation");
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// Return the parsed operation to the caller
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return Operation;
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}
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// Implements the 'p' operation. This function traverses the archive
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// looking for members that match the path list.
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static void doPrint(StringRef Name, object::Archive::child_iterator I) {
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if (Verbose)
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outs() << "Printing " << Name << "\n";
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StringRef Data = I->getBuffer();
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outs().write(Data.data(), Data.size());
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}
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// putMode - utility function for printing out the file mode when the 't'
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// operation is in verbose mode.
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static void printMode(unsigned mode) {
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if (mode & 004)
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outs() << "r";
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else
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outs() << "-";
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if (mode & 002)
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outs() << "w";
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else
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outs() << "-";
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if (mode & 001)
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outs() << "x";
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else
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outs() << "-";
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}
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// Implement the 't' operation. This function prints out just
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// the file names of each of the members. However, if verbose mode is requested
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// ('v' modifier) then the file type, permission mode, user, group, size, and
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// modification time are also printed.
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static void doDisplayTable(StringRef Name, object::Archive::child_iterator I) {
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if (Verbose) {
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sys::fs::perms Mode = I->getAccessMode();
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printMode((Mode >> 6) & 007);
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printMode((Mode >> 3) & 007);
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printMode(Mode & 007);
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outs() << ' ' << I->getUID();
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outs() << '/' << I->getGID();
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outs() << ' ' << format("%6llu", I->getSize());
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outs() << ' ' << I->getLastModified().str();
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outs() << ' ';
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}
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outs() << Name << "\n";
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}
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// Implement the 'x' operation. This function extracts files back to the file
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// system.
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static void doExtract(StringRef Name, object::Archive::child_iterator I) {
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// Retain the original mode.
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sys::fs::perms Mode = I->getAccessMode();
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SmallString<128> Storage = Name;
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int FD;
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failIfError(
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sys::fs::openFileForWrite(Storage.c_str(), FD, sys::fs::F_None, Mode),
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Storage.c_str());
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{
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raw_fd_ostream file(FD, false);
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// Get the data and its length
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StringRef Data = I->getBuffer();
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// Write the data.
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file.write(Data.data(), Data.size());
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}
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// If we're supposed to retain the original modification times, etc. do so
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// now.
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if (OriginalDates)
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failIfError(
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sys::fs::setLastModificationAndAccessTime(FD, I->getLastModified()));
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if (close(FD))
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fail("Could not close the file");
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}
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static bool shouldCreateArchive(ArchiveOperation Op) {
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switch (Op) {
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case Print:
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case Delete:
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case Move:
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case DisplayTable:
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case Extract:
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case CreateSymTab:
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return false;
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case QuickAppend:
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case ReplaceOrInsert:
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return true;
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}
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llvm_unreachable("Missing entry in covered switch.");
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}
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static void performReadOperation(ArchiveOperation Operation,
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object::Archive *OldArchive) {
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for (object::Archive::child_iterator I = OldArchive->child_begin(),
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E = OldArchive->child_end();
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I != E; ++I) {
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ErrorOr<StringRef> NameOrErr = I->getName();
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failIfError(NameOrErr.getError());
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StringRef Name = NameOrErr.get();
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if (!Members.empty() &&
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std::find(Members.begin(), Members.end(), Name) == Members.end())
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continue;
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switch (Operation) {
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default:
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llvm_unreachable("Not a read operation");
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case Print:
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doPrint(Name, I);
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break;
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case DisplayTable:
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doDisplayTable(Name, I);
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break;
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case Extract:
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doExtract(Name, I);
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break;
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}
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}
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}
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namespace {
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class NewArchiveIterator {
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bool IsNewMember;
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StringRef Name;
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object::Archive::child_iterator OldI;
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std::string NewFilename;
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mutable int NewFD;
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mutable sys::fs::file_status NewStatus;
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public:
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NewArchiveIterator(object::Archive::child_iterator I, StringRef Name);
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NewArchiveIterator(std::string *I, StringRef Name);
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NewArchiveIterator();
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bool isNewMember() const;
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StringRef getName() const;
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object::Archive::child_iterator getOld() const;
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const char *getNew() const;
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int getFD() const;
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const sys::fs::file_status &getStatus() const;
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};
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}
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NewArchiveIterator::NewArchiveIterator() {}
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NewArchiveIterator::NewArchiveIterator(object::Archive::child_iterator I,
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StringRef Name)
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: IsNewMember(false), Name(Name), OldI(I) {}
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NewArchiveIterator::NewArchiveIterator(std::string *NewFilename, StringRef Name)
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: IsNewMember(true), Name(Name), NewFilename(*NewFilename), NewFD(-1) {}
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StringRef NewArchiveIterator::getName() const { return Name; }
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bool NewArchiveIterator::isNewMember() const { return IsNewMember; }
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object::Archive::child_iterator NewArchiveIterator::getOld() const {
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assert(!IsNewMember);
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return OldI;
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}
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const char *NewArchiveIterator::getNew() const {
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assert(IsNewMember);
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return NewFilename.c_str();
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}
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int NewArchiveIterator::getFD() const {
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assert(IsNewMember);
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if (NewFD != -1)
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return NewFD;
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failIfError(sys::fs::openFileForRead(NewFilename, NewFD), NewFilename);
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assert(NewFD != -1);
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failIfError(sys::fs::status(NewFD, NewStatus), NewFilename);
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// Opening a directory doesn't make sense. Let it fail.
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// Linux cannot open directories with open(2), although
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// cygwin and *bsd can.
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if (NewStatus.type() == sys::fs::file_type::directory_file)
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failIfError(make_error_code(errc::is_a_directory), NewFilename);
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return NewFD;
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}
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const sys::fs::file_status &NewArchiveIterator::getStatus() const {
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assert(IsNewMember);
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assert(NewFD != -1 && "Must call getFD first");
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return NewStatus;
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}
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template <typename T>
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void addMember(std::vector<NewArchiveIterator> &Members, T I, StringRef Name,
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int Pos = -1) {
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NewArchiveIterator NI(I, Name);
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if (Pos == -1)
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Members.push_back(NI);
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else
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Members[Pos] = NI;
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}
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enum InsertAction {
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IA_AddOldMember,
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IA_AddNewMeber,
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IA_Delete,
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IA_MoveOldMember,
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IA_MoveNewMember
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};
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static InsertAction
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computeInsertAction(ArchiveOperation Operation,
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object::Archive::child_iterator I, StringRef Name,
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std::vector<std::string>::iterator &Pos) {
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if (Operation == QuickAppend || Members.empty())
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return IA_AddOldMember;
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std::vector<std::string>::iterator MI = std::find_if(
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Members.begin(), Members.end(),
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[Name](StringRef Path) { return Name == sys::path::filename(Path); });
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if (MI == Members.end())
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return IA_AddOldMember;
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Pos = MI;
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if (Operation == Delete)
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return IA_Delete;
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if (Operation == Move)
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return IA_MoveOldMember;
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if (Operation == ReplaceOrInsert) {
|
|
StringRef PosName = sys::path::filename(RelPos);
|
|
if (!OnlyUpdate) {
|
|
if (PosName.empty())
|
|
return IA_AddNewMeber;
|
|
return IA_MoveNewMember;
|
|
}
|
|
|
|
// We could try to optimize this to a fstat, but it is not a common
|
|
// operation.
|
|
sys::fs::file_status Status;
|
|
failIfError(sys::fs::status(*MI, Status), *MI);
|
|
if (Status.getLastModificationTime() < I->getLastModified()) {
|
|
if (PosName.empty())
|
|
return IA_AddOldMember;
|
|
return IA_MoveOldMember;
|
|
}
|
|
|
|
if (PosName.empty())
|
|
return IA_AddNewMeber;
|
|
return IA_MoveNewMember;
|
|
}
|
|
llvm_unreachable("No such operation");
|
|
}
|
|
|
|
// We have to walk this twice and computing it is not trivial, so creating an
|
|
// explicit std::vector is actually fairly efficient.
|
|
static std::vector<NewArchiveIterator>
|
|
computeNewArchiveMembers(ArchiveOperation Operation,
|
|
object::Archive *OldArchive) {
|
|
std::vector<NewArchiveIterator> Ret;
|
|
std::vector<NewArchiveIterator> Moved;
|
|
int InsertPos = -1;
|
|
StringRef PosName = sys::path::filename(RelPos);
|
|
if (OldArchive) {
|
|
for (object::Archive::child_iterator I = OldArchive->child_begin(),
|
|
E = OldArchive->child_end();
|
|
I != E; ++I) {
|
|
int Pos = Ret.size();
|
|
ErrorOr<StringRef> NameOrErr = I->getName();
|
|
failIfError(NameOrErr.getError());
|
|
StringRef Name = NameOrErr.get();
|
|
if (Name == PosName) {
|
|
assert(AddAfter || AddBefore);
|
|
if (AddBefore)
|
|
InsertPos = Pos;
|
|
else
|
|
InsertPos = Pos + 1;
|
|
}
|
|
|
|
std::vector<std::string>::iterator MemberI = Members.end();
|
|
InsertAction Action = computeInsertAction(Operation, I, Name, MemberI);
|
|
switch (Action) {
|
|
case IA_AddOldMember:
|
|
addMember(Ret, I, Name);
|
|
break;
|
|
case IA_AddNewMeber:
|
|
addMember(Ret, &*MemberI, Name);
|
|
break;
|
|
case IA_Delete:
|
|
break;
|
|
case IA_MoveOldMember:
|
|
addMember(Moved, I, Name);
|
|
break;
|
|
case IA_MoveNewMember:
|
|
addMember(Moved, &*MemberI, Name);
|
|
break;
|
|
}
|
|
if (MemberI != Members.end())
|
|
Members.erase(MemberI);
|
|
}
|
|
}
|
|
|
|
if (Operation == Delete)
|
|
return Ret;
|
|
|
|
if (!RelPos.empty() && InsertPos == -1)
|
|
fail("Insertion point not found");
|
|
|
|
if (RelPos.empty())
|
|
InsertPos = Ret.size();
|
|
|
|
assert(unsigned(InsertPos) <= Ret.size());
|
|
Ret.insert(Ret.begin() + InsertPos, Moved.begin(), Moved.end());
|
|
|
|
Ret.insert(Ret.begin() + InsertPos, Members.size(), NewArchiveIterator());
|
|
int Pos = InsertPos;
|
|
for (std::vector<std::string>::iterator I = Members.begin(),
|
|
E = Members.end();
|
|
I != E; ++I, ++Pos) {
|
|
StringRef Name = sys::path::filename(*I);
|
|
addMember(Ret, &*I, Name, Pos);
|
|
}
|
|
|
|
return Ret;
|
|
}
|
|
|
|
template <typename T>
|
|
static void printWithSpacePadding(raw_fd_ostream &OS, T Data, unsigned Size,
|
|
bool MayTruncate = false) {
|
|
uint64_t OldPos = OS.tell();
|
|
OS << Data;
|
|
unsigned SizeSoFar = OS.tell() - OldPos;
|
|
if (Size > SizeSoFar) {
|
|
unsigned Remaining = Size - SizeSoFar;
|
|
for (unsigned I = 0; I < Remaining; ++I)
|
|
OS << ' ';
|
|
} else if (Size < SizeSoFar) {
|
|
assert(MayTruncate && "Data doesn't fit in Size");
|
|
// Some of the data this is used for (like UID) can be larger than the
|
|
// space available in the archive format. Truncate in that case.
|
|
OS.seek(OldPos + Size);
|
|
}
|
|
}
|
|
|
|
static void print32BE(raw_fd_ostream &Out, unsigned Val) {
|
|
for (int I = 3; I >= 0; --I) {
|
|
char V = (Val >> (8 * I)) & 0xff;
|
|
Out << V;
|
|
}
|
|
}
|
|
|
|
static void printRestOfMemberHeader(raw_fd_ostream &Out,
|
|
const sys::TimeValue &ModTime, unsigned UID,
|
|
unsigned GID, unsigned Perms,
|
|
unsigned Size) {
|
|
printWithSpacePadding(Out, ModTime.toEpochTime(), 12);
|
|
printWithSpacePadding(Out, UID, 6, true);
|
|
printWithSpacePadding(Out, GID, 6, true);
|
|
printWithSpacePadding(Out, format("%o", Perms), 8);
|
|
printWithSpacePadding(Out, Size, 10);
|
|
Out << "`\n";
|
|
}
|
|
|
|
static void printMemberHeader(raw_fd_ostream &Out, StringRef Name,
|
|
const sys::TimeValue &ModTime, unsigned UID,
|
|
unsigned GID, unsigned Perms, unsigned Size) {
|
|
printWithSpacePadding(Out, Twine(Name) + "/", 16);
|
|
printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
|
|
}
|
|
|
|
static void printMemberHeader(raw_fd_ostream &Out, unsigned NameOffset,
|
|
const sys::TimeValue &ModTime, unsigned UID,
|
|
unsigned GID, unsigned Perms, unsigned Size) {
|
|
Out << '/';
|
|
printWithSpacePadding(Out, NameOffset, 15);
|
|
printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
|
|
}
|
|
|
|
static void writeStringTable(raw_fd_ostream &Out,
|
|
ArrayRef<NewArchiveIterator> Members,
|
|
std::vector<unsigned> &StringMapIndexes) {
|
|
unsigned StartOffset = 0;
|
|
for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
|
|
E = Members.end();
|
|
I != E; ++I) {
|
|
StringRef Name = I->getName();
|
|
if (Name.size() < 16)
|
|
continue;
|
|
if (StartOffset == 0) {
|
|
printWithSpacePadding(Out, "//", 58);
|
|
Out << "`\n";
|
|
StartOffset = Out.tell();
|
|
}
|
|
StringMapIndexes.push_back(Out.tell() - StartOffset);
|
|
Out << Name << "/\n";
|
|
}
|
|
if (StartOffset == 0)
|
|
return;
|
|
if (Out.tell() % 2)
|
|
Out << '\n';
|
|
int Pos = Out.tell();
|
|
Out.seek(StartOffset - 12);
|
|
printWithSpacePadding(Out, Pos - StartOffset, 10);
|
|
Out.seek(Pos);
|
|
}
|
|
|
|
static void
|
|
writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
|
|
ArrayRef<MemoryBufferRef> Buffers,
|
|
std::vector<std::pair<unsigned, unsigned>> &MemberOffsetRefs) {
|
|
unsigned StartOffset = 0;
|
|
unsigned MemberNum = 0;
|
|
std::string NameBuf;
|
|
raw_string_ostream NameOS(NameBuf);
|
|
unsigned NumSyms = 0;
|
|
LLVMContext &Context = getGlobalContext();
|
|
for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
|
|
E = Members.end();
|
|
I != E; ++I, ++MemberNum) {
|
|
MemoryBufferRef MemberBuffer = Buffers[MemberNum];
|
|
ErrorOr<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
|
|
object::SymbolicFile::createSymbolicFile(
|
|
MemberBuffer, sys::fs::file_magic::unknown, &Context);
|
|
if (!ObjOrErr)
|
|
continue; // FIXME: check only for "not an object file" errors.
|
|
object::SymbolicFile &Obj = *ObjOrErr.get();
|
|
|
|
if (!StartOffset) {
|
|
printMemberHeader(Out, "", sys::TimeValue::now(), 0, 0, 0, 0);
|
|
StartOffset = Out.tell();
|
|
print32BE(Out, 0);
|
|
}
|
|
|
|
for (const object::BasicSymbolRef &S : Obj.symbols()) {
|
|
uint32_t Symflags = S.getFlags();
|
|
if (Symflags & object::SymbolRef::SF_FormatSpecific)
|
|
continue;
|
|
if (!(Symflags & object::SymbolRef::SF_Global))
|
|
continue;
|
|
if (Symflags & object::SymbolRef::SF_Undefined)
|
|
continue;
|
|
failIfError(S.printName(NameOS));
|
|
NameOS << '\0';
|
|
++NumSyms;
|
|
MemberOffsetRefs.push_back(std::make_pair(Out.tell(), MemberNum));
|
|
print32BE(Out, 0);
|
|
}
|
|
}
|
|
Out << NameOS.str();
|
|
|
|
if (StartOffset == 0)
|
|
return;
|
|
|
|
if (Out.tell() % 2)
|
|
Out << '\0';
|
|
|
|
unsigned Pos = Out.tell();
|
|
Out.seek(StartOffset - 12);
|
|
printWithSpacePadding(Out, Pos - StartOffset, 10);
|
|
Out.seek(StartOffset);
|
|
print32BE(Out, NumSyms);
|
|
Out.seek(Pos);
|
|
}
|
|
|
|
static void performWriteOperation(ArchiveOperation Operation,
|
|
object::Archive *OldArchive) {
|
|
SmallString<128> TmpArchive;
|
|
failIfError(sys::fs::createUniqueFile(ArchiveName + ".temp-archive-%%%%%%%.a",
|
|
TmpArchiveFD, TmpArchive));
|
|
|
|
TemporaryOutput = TmpArchive.c_str();
|
|
tool_output_file Output(TemporaryOutput, TmpArchiveFD);
|
|
raw_fd_ostream &Out = Output.os();
|
|
Out << "!<arch>\n";
|
|
|
|
std::vector<NewArchiveIterator> NewMembers =
|
|
computeNewArchiveMembers(Operation, OldArchive);
|
|
|
|
std::vector<std::pair<unsigned, unsigned> > MemberOffsetRefs;
|
|
|
|
std::vector<std::unique_ptr<MemoryBuffer>> Buffers;
|
|
std::vector<MemoryBufferRef> Members;
|
|
|
|
for (unsigned I = 0, N = NewMembers.size(); I < N; ++I) {
|
|
NewArchiveIterator &Member = NewMembers[I];
|
|
MemoryBufferRef MemberRef;
|
|
|
|
if (Member.isNewMember()) {
|
|
const char *Filename = Member.getNew();
|
|
int FD = Member.getFD();
|
|
const sys::fs::file_status &Status = Member.getStatus();
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> MemberBufferOrErr =
|
|
MemoryBuffer::getOpenFile(FD, Filename, Status.getSize(), false);
|
|
failIfError(MemberBufferOrErr.getError(), Filename);
|
|
Buffers.push_back(std::move(MemberBufferOrErr.get()));
|
|
MemberRef = Buffers.back()->getMemBufferRef();
|
|
} else {
|
|
object::Archive::child_iterator OldMember = Member.getOld();
|
|
ErrorOr<MemoryBufferRef> MemberBufferOrErr =
|
|
OldMember->getMemoryBufferRef();
|
|
failIfError(MemberBufferOrErr.getError());
|
|
MemberRef = MemberBufferOrErr.get();
|
|
}
|
|
Members.push_back(MemberRef);
|
|
}
|
|
|
|
if (Symtab) {
|
|
writeSymbolTable(Out, NewMembers, Members, MemberOffsetRefs);
|
|
}
|
|
|
|
std::vector<unsigned> StringMapIndexes;
|
|
writeStringTable(Out, NewMembers, StringMapIndexes);
|
|
|
|
std::vector<std::pair<unsigned, unsigned> >::iterator MemberRefsI =
|
|
MemberOffsetRefs.begin();
|
|
|
|
unsigned MemberNum = 0;
|
|
unsigned LongNameMemberNum = 0;
|
|
for (std::vector<NewArchiveIterator>::iterator I = NewMembers.begin(),
|
|
E = NewMembers.end();
|
|
I != E; ++I, ++MemberNum) {
|
|
|
|
unsigned Pos = Out.tell();
|
|
while (MemberRefsI != MemberOffsetRefs.end() &&
|
|
MemberRefsI->second == MemberNum) {
|
|
Out.seek(MemberRefsI->first);
|
|
print32BE(Out, Pos);
|
|
++MemberRefsI;
|
|
}
|
|
Out.seek(Pos);
|
|
|
|
MemoryBufferRef File = Members[MemberNum];
|
|
if (I->isNewMember()) {
|
|
const char *FileName = I->getNew();
|
|
const sys::fs::file_status &Status = I->getStatus();
|
|
|
|
StringRef Name = sys::path::filename(FileName);
|
|
if (Name.size() < 16)
|
|
printMemberHeader(Out, Name, Status.getLastModificationTime(),
|
|
Status.getUser(), Status.getGroup(),
|
|
Status.permissions(), Status.getSize());
|
|
else
|
|
printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
|
|
Status.getLastModificationTime(), Status.getUser(),
|
|
Status.getGroup(), Status.permissions(),
|
|
Status.getSize());
|
|
} else {
|
|
object::Archive::child_iterator OldMember = I->getOld();
|
|
StringRef Name = I->getName();
|
|
|
|
if (Name.size() < 16)
|
|
printMemberHeader(Out, Name, OldMember->getLastModified(),
|
|
OldMember->getUID(), OldMember->getGID(),
|
|
OldMember->getAccessMode(), OldMember->getSize());
|
|
else
|
|
printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
|
|
OldMember->getLastModified(), OldMember->getUID(),
|
|
OldMember->getGID(), OldMember->getAccessMode(),
|
|
OldMember->getSize());
|
|
}
|
|
|
|
Out << File.getBuffer();
|
|
|
|
if (Out.tell() % 2)
|
|
Out << '\n';
|
|
}
|
|
|
|
Output.keep();
|
|
Out.close();
|
|
sys::fs::rename(TemporaryOutput, ArchiveName);
|
|
TemporaryOutput = nullptr;
|
|
}
|
|
|
|
static void createSymbolTable(object::Archive *OldArchive) {
|
|
// When an archive is created or modified, if the s option is given, the
|
|
// resulting archive will have a current symbol table. If the S option
|
|
// is given, it will have no symbol table.
|
|
// In summary, we only need to update the symbol table if we have none.
|
|
// This is actually very common because of broken build systems that think
|
|
// they have to run ranlib.
|
|
if (OldArchive->hasSymbolTable())
|
|
return;
|
|
|
|
performWriteOperation(CreateSymTab, OldArchive);
|
|
}
|
|
|
|
static void performOperation(ArchiveOperation Operation,
|
|
object::Archive *OldArchive) {
|
|
switch (Operation) {
|
|
case Print:
|
|
case DisplayTable:
|
|
case Extract:
|
|
performReadOperation(Operation, OldArchive);
|
|
return;
|
|
|
|
case Delete:
|
|
case Move:
|
|
case QuickAppend:
|
|
case ReplaceOrInsert:
|
|
performWriteOperation(Operation, OldArchive);
|
|
return;
|
|
case CreateSymTab:
|
|
createSymbolTable(OldArchive);
|
|
return;
|
|
}
|
|
llvm_unreachable("Unknown operation.");
|
|
}
|
|
|
|
static int ar_main(char **argv);
|
|
static int ranlib_main();
|
|
|
|
// main - main program for llvm-ar .. see comments in the code
|
|
int main(int argc, char **argv) {
|
|
ToolName = argv[0];
|
|
// Print a stack trace if we signal out.
|
|
sys::PrintStackTraceOnErrorSignal();
|
|
PrettyStackTraceProgram X(argc, argv);
|
|
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
|
|
|
|
// Have the command line options parsed and handle things
|
|
// like --help and --version.
|
|
cl::ParseCommandLineOptions(argc, argv,
|
|
"LLVM Archiver (llvm-ar)\n\n"
|
|
" This program archives bitcode files into single libraries\n"
|
|
);
|
|
|
|
llvm::InitializeAllTargetInfos();
|
|
llvm::InitializeAllTargetMCs();
|
|
llvm::InitializeAllAsmParsers();
|
|
|
|
StringRef Stem = sys::path::stem(ToolName);
|
|
if (Stem.find("ar") != StringRef::npos)
|
|
return ar_main(argv);
|
|
if (Stem.find("ranlib") != StringRef::npos)
|
|
return ranlib_main();
|
|
fail("Not ranlib or ar!");
|
|
}
|
|
|
|
static int performOperation(ArchiveOperation Operation);
|
|
|
|
int ranlib_main() {
|
|
if (RestOfArgs.size() != 1)
|
|
fail(ToolName + "takes just one archive as argument");
|
|
ArchiveName = RestOfArgs[0];
|
|
return performOperation(CreateSymTab);
|
|
}
|
|
|
|
int ar_main(char **argv) {
|
|
// Do our own parsing of the command line because the CommandLine utility
|
|
// can't handle the grouped positional parameters without a dash.
|
|
ArchiveOperation Operation = parseCommandLine();
|
|
return performOperation(Operation);
|
|
}
|
|
|
|
static int performOperation(ArchiveOperation Operation) {
|
|
// Create or open the archive object.
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
|
|
MemoryBuffer::getFile(ArchiveName, -1, false);
|
|
std::error_code EC = Buf.getError();
|
|
if (EC && EC != errc::no_such_file_or_directory) {
|
|
errs() << ToolName << ": error opening '" << ArchiveName
|
|
<< "': " << EC.message() << "!\n";
|
|
return 1;
|
|
}
|
|
|
|
if (!EC) {
|
|
object::Archive Archive(Buf.get()->getMemBufferRef(), EC);
|
|
|
|
if (EC) {
|
|
errs() << ToolName << ": error loading '" << ArchiveName
|
|
<< "': " << EC.message() << "!\n";
|
|
return 1;
|
|
}
|
|
performOperation(Operation, &Archive);
|
|
return 0;
|
|
}
|
|
|
|
assert(EC == errc::no_such_file_or_directory);
|
|
|
|
if (!shouldCreateArchive(Operation)) {
|
|
failIfError(EC, Twine("error loading '") + ArchiveName + "'");
|
|
} else {
|
|
if (!Create) {
|
|
// Produce a warning if we should and we're creating the archive
|
|
errs() << ToolName << ": creating " << ArchiveName << "\n";
|
|
}
|
|
}
|
|
|
|
performOperation(Operation, nullptr);
|
|
return 0;
|
|
}
|