forked from lix-project/lix
code review comments
This commit is contained in:
Jude Taylor
parent
60f4b25d7d
commit
adf0216d98
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@ -11,14 +11,11 @@
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using namespace nix;
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typedef std::map<string, std::set<string>> SetMap;
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static auto cacheDir = Path{};
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Path resolveCacheFile(const Path & lib) {
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Path lib2 = Path(lib);
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std::replace(lib2.begin(), lib2.end(), '/', '%');
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return cacheDir + "/" + lib2;
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Path resolveCacheFile(Path lib) {
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std::replace(lib.begin(), lib.end(), '/', '%');
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return cacheDir + "/" + lib;
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}
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std::set<string> readCacheFile(const Path & file) {
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@ -34,169 +31,169 @@ void writeCacheFile(const Path & file, std::set<string> & deps) {
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fp.close();
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}
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std::string find_dylib_name(FILE *obj_file, struct load_command cmd) {
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fpos_t pos;
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fgetpos(obj_file, &pos);
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struct dylib_command dylc;
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dylc.cmd = cmd.cmd;
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dylc.cmdsize = cmd.cmdsize;
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fread(&dylc.dylib, sizeof(struct dylib), 1, obj_file);
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std::string findDylibName(FILE *obj_file, struct load_command cmd) {
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fpos_t pos;
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fgetpos(obj_file, &pos);
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struct dylib_command dylc;
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dylc.cmd = cmd.cmd;
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dylc.cmdsize = cmd.cmdsize;
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fread(&dylc.dylib, sizeof(struct dylib), 1, obj_file);
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char *dylib_name = (char*)calloc(cmd.cmdsize, sizeof(char));
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fseek(obj_file,
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// offset is calculated from the beginning of the load command, which is two
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// uint32_t's backwards
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dylc.dylib.name.offset - (sizeof(uint32_t) * 2) + pos,
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SEEK_SET);
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fread(dylib_name, sizeof(char), cmd.cmdsize, obj_file);
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fseek(obj_file, pos, SEEK_SET);
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return std::string(dylib_name);
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char *dylib_name = (char*)calloc(cmd.cmdsize, sizeof(char));
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fseek(obj_file,
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// offset is calculated from the beginning of the load command, which is two
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// uint32_t's backwards
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dylc.dylib.name.offset - (sizeof(uint32_t) * 2) + pos,
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SEEK_SET);
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fread(dylib_name, sizeof(char), cmd.cmdsize, obj_file);
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fseek(obj_file, pos, SEEK_SET);
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return std::string(dylib_name);
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}
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bool seek_mach64_blob(FILE *obj_file, enum NXByteOrder end) {
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struct fat_header head;
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fread(&head, sizeof(struct fat_header), 1, obj_file);
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swap_fat_header(&head, end);
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for(uint32_t narches = 0; narches < head.nfat_arch; narches++) {
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struct fat_arch arch;
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fread(&arch, sizeof(struct fat_arch), 1, obj_file);
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swap_fat_arch(&arch, 1, end);
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if(arch.cputype == CPU_TYPE_X86_64) {
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fseek(obj_file, arch.offset, SEEK_SET);
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return true;
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bool seekMach64Blob(FILE *obj_file, enum NXByteOrder end) {
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struct fat_header head;
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fread(&head, sizeof(struct fat_header), 1, obj_file);
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swap_fat_header(&head, end);
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for(uint32_t narches = 0; narches < head.nfat_arch; narches++) {
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struct fat_arch arch;
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fread(&arch, sizeof(struct fat_arch), 1, obj_file);
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swap_fat_arch(&arch, 1, end);
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if(arch.cputype == CPU_TYPE_X86_64) {
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fseek(obj_file, arch.offset, SEEK_SET);
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return true;
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}
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}
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}
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return false;
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return false;
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}
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std::set<std::string> runResolver(const Path & filename) {
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FILE *obj_file = fopen(filename.c_str(), "rb");
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uint32_t magic;
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fread(&magic, sizeof(uint32_t), 1, obj_file);
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fseek(obj_file, 0, SEEK_SET);
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enum NXByteOrder endianness;
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if(magic == 0xBEBAFECA) {
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endianness = NX_BigEndian;
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if(!seek_mach64_blob(obj_file, endianness)) {
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std::cerr << "Could not find any mach64 blobs in file " << filename << ", continuing..." << std::endl;
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return std::set<string>();
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FILE *obj_file = fopen(filename.c_str(), "rb");
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uint32_t magic;
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fread(&magic, sizeof(uint32_t), 1, obj_file);
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fseek(obj_file, 0, SEEK_SET);
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enum NXByteOrder endianness;
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if(magic == 0xBEBAFECA) {
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endianness = NX_BigEndian;
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if(!seekMach64Blob(obj_file, endianness)) {
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std::cerr << "Could not find any mach64 blobs in file " << filename << ", continuing..." << std::endl;
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return std::set<string>();
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}
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}
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}
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struct mach_header_64 header;
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fread(&header, sizeof(struct mach_header_64), 1, obj_file);
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if(!(header.magic == MH_MAGIC_64 || header.magic == MH_CIGAM_64)) {
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std::cerr << "Not a mach-o object file: " << filename << std::endl;
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return std::set<string>();
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}
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std::set<string> libs;
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for(uint32_t i = 0; i < header.ncmds; i++) {
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struct load_command cmd;
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fread(&cmd.cmd, sizeof(uint32_t), 1, obj_file);
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fread(&cmd.cmdsize, sizeof(uint32_t), 1, obj_file);
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switch(cmd.cmd) {
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case LC_LOAD_DYLIB:
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case LC_LOAD_UPWARD_DYLIB:
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case LC_REEXPORT_DYLIB:
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libs.insert(find_dylib_name(obj_file, cmd));
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break;
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struct mach_header_64 header;
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fread(&header, sizeof(struct mach_header_64), 1, obj_file);
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if(!(header.magic == MH_MAGIC_64 || header.magic == MH_CIGAM_64)) {
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std::cerr << "Not a mach-o object file: " << filename << std::endl;
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return std::set<string>();
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}
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fseek(obj_file, cmd.cmdsize - (sizeof(uint32_t) * 2), SEEK_CUR);
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}
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fclose(obj_file);
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libs.erase(filename);
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return libs;
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std::set<string> libs;
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for(uint32_t i = 0; i < header.ncmds; i++) {
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struct load_command cmd;
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fread(&cmd.cmd, sizeof(cmd.cmd), 1, obj_file);
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fread(&cmd.cmdsize, sizeof(cmd.cmdsize), 1, obj_file);
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switch(cmd.cmd) {
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case LC_LOAD_DYLIB:
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case LC_LOAD_UPWARD_DYLIB:
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case LC_REEXPORT_DYLIB:
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libs.insert(findDylibName(obj_file, cmd));
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break;
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}
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fseek(obj_file, cmd.cmdsize - (sizeof(uint32_t) * 2), SEEK_CUR);
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}
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fclose(obj_file);
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libs.erase(filename);
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return libs;
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}
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bool isSymlink(const Path & path) {
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struct stat st;
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if(lstat(path.c_str(), &st))
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throw SysError(format("getting attributes of path ‘%1%’") % path);
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struct stat st;
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if(lstat(path.c_str(), &st))
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throw SysError(format("getting attributes of path ‘%1%’") % path);
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return S_ISLNK(st.st_mode);
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return S_ISLNK(st.st_mode);
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}
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Path resolveSymlink(const Path & path) {
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char buf[PATH_MAX];
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ssize_t len = readlink(path.c_str(), buf, sizeof(buf) - 1);
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if(len != -1) {
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buf[len] = 0;
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return Path(buf);
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buf[len] = 0;
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return Path(buf);
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} else {
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throw SysError(format("readlink('%1%')") % path);
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throw SysError(format("readlink('%1%')") % path);
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}
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}
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std::set<string> resolve_tree(const Path & path, PathSet & deps) {
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std::set<string> results;
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if(deps.find(path) != deps.end()) {
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return std::set<string>();
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}
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deps.insert(path);
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for (auto & lib : runResolver(path)) {
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results.insert(lib);
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for (auto & p : resolve_tree(lib, deps)) {
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results.insert(p);
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std::set<string> resolveTree(const Path & path, PathSet & deps) {
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std::set<string> results;
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if(deps.find(path) != deps.end()) {
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return std::set<string>();
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}
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}
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return results;
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deps.insert(path);
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for (auto & lib : runResolver(path)) {
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results.insert(lib);
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for (auto & p : resolveTree(lib, deps)) {
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results.insert(p);
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}
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}
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return results;
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}
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std::set<string> get_path(const Path & path) {
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Path cacheFile = resolveCacheFile(path);
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if(pathExists(cacheFile)) {
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return readCacheFile(cacheFile);
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}
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std::set<string> getPath(const Path & path) {
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Path cacheFile = resolveCacheFile(path);
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if(pathExists(cacheFile)) {
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return readCacheFile(cacheFile);
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}
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std::set<string> deps;
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std::set<string> paths;
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paths.insert(path);
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std::set<string> deps;
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std::set<string> paths;
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paths.insert(path);
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Path next_path = Path(path);
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while(isSymlink(next_path)) {
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next_path = resolveSymlink(next_path);
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paths.insert(next_path);
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}
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Path next_path = Path(path);
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while(isSymlink(next_path)) {
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next_path = resolveSymlink(next_path);
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paths.insert(next_path);
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}
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for(auto & t : resolve_tree(next_path, deps)) {
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paths.insert(t);
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}
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for(auto & t : resolveTree(next_path, deps)) {
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paths.insert(t);
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}
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writeCacheFile(cacheFile, paths);
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writeCacheFile(cacheFile, paths);
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return paths;
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return paths;
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}
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int main(int argc, char ** argv) {
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return handleExceptions(argv[0], [&]() {
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initNix();
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initNix();
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struct utsname _uname;
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struct utsname _uname;
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uname(&_uname);
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uname(&_uname);
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cacheDir = (format("%1%/dependency-maps/%2%-%3%-%4%")
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% settings.nixStateDir
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% _uname.machine
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% _uname.sysname
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% _uname.release).str();
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cacheDir = (format("%1%/dependency-maps/%2%-%3%-%4%")
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% settings.nixStateDir
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% _uname.machine
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% _uname.sysname
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% _uname.release).str();
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auto store = openStore();
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auto store = openStore();
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auto drv = store->derivationFromPath(Path(argv[1]));
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Strings impurePaths = tokenizeString<Strings>(get(drv.env, "__impureHostDeps"));
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auto drv = store->derivationFromPath(Path(argv[1]));
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Strings impurePaths = tokenizeString<Strings>(get(drv.env, "__impureHostDeps"));
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std::set<string> all_paths;
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std::set<string> all_paths;
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for (auto & path : impurePaths) {
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for(auto & p : get_path(path)) {
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all_paths.insert(p);
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for (auto & path : impurePaths) {
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for(auto & p : getPath(path)) {
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all_paths.insert(p);
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}
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}
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}
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std::cout << "extra-chroot-dirs" << std::endl;
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for(auto & path : all_paths) {
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std::cout << path << std::endl;
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}
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std::cout << std::endl;
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std::cout << "extra-chroot-dirs" << std::endl;
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for(auto & path : all_paths) {
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std::cout << path << std::endl;
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}
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std::cout << std::endl;
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});
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}
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