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bpo-45019: Add a tool to generate list of modules to include for frozen modules (gh-27980)
Frozen modules must be added to several files in order to work properly. Before this change this had to be done manually. Here we add a tool to generate the relevant lines in those files instead. This helps us avoid mistakes and omissions. https://bugs.python.org/issue45019
This commit is contained in:
Eric Snow
GitHub
parent
5246dbc2a1
commit
044e8d866f
19 changed files with 833 additions and 199 deletions
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@ -1,167 +0,0 @@
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/* This is built as a stand-alone executable by the Makefile, and helps turn
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Lib/importlib/_bootstrap.py into a frozen module in Python/importlib.h
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*/
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#include <Python.h>
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#include <marshal.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifndef MS_WINDOWS
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#include <unistd.h>
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#endif
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/* To avoid a circular dependency on frozen.o, we create our own structure
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of frozen modules instead, left deliberately blank so as to avoid
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unintentional import of a stale version of _frozen_importlib. */
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static const struct _frozen _PyImport_FrozenModules[] = {
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{0, 0, 0} /* sentinel */
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};
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#ifndef MS_WINDOWS
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/* On Windows, this links with the regular pythonXY.dll, so this variable comes
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from frozen.obj. In the Makefile, frozen.o is not linked into this executable,
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so we define the variable here. */
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const struct _frozen *PyImport_FrozenModules;
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#endif
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static const char header[] =
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"/* Auto-generated by Programs/_freeze_importlib.c */";
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int
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main(int argc, char *argv[])
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{
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const char *name, *inpath, *outpath;
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char buf[100];
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FILE *infile = NULL, *outfile = NULL;
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struct _Py_stat_struct stat;
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size_t text_size, data_size, i, n;
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char *text = NULL;
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unsigned char *data;
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PyObject *code = NULL, *marshalled = NULL;
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PyImport_FrozenModules = _PyImport_FrozenModules;
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if (argc != 4) {
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fprintf(stderr, "need to specify the name, input and output paths\n");
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return 2;
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}
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name = argv[1];
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inpath = argv[2];
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outpath = argv[3];
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infile = fopen(inpath, "rb");
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if (infile == NULL) {
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fprintf(stderr, "cannot open '%s' for reading\n", inpath);
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goto error;
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}
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if (_Py_fstat_noraise(fileno(infile), &stat)) {
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fprintf(stderr, "cannot fstat '%s'\n", inpath);
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goto error;
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}
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text_size = (size_t)stat.st_size;
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text = (char *) malloc(text_size + 1);
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if (text == NULL) {
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fprintf(stderr, "could not allocate %ld bytes\n", (long) text_size);
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goto error;
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}
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n = fread(text, 1, text_size, infile);
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fclose(infile);
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infile = NULL;
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if (n < text_size) {
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fprintf(stderr, "read too short: got %ld instead of %ld bytes\n",
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(long) n, (long) text_size);
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goto error;
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}
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text[text_size] = '\0';
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PyConfig config;
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PyConfig_InitIsolatedConfig(&config);
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config.site_import = 0;
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PyStatus status;
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status = PyConfig_SetString(&config, &config.program_name,
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L"./_freeze_importlib");
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if (PyStatus_Exception(status)) {
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PyConfig_Clear(&config);
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Py_ExitStatusException(status);
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}
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/* Don't install importlib, since it could execute outdated bytecode. */
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config._install_importlib = 0;
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config._init_main = 0;
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status = Py_InitializeFromConfig(&config);
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PyConfig_Clear(&config);
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if (PyStatus_Exception(status)) {
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Py_ExitStatusException(status);
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}
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sprintf(buf, "<frozen %s>", name);
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code = Py_CompileStringExFlags(text, buf, Py_file_input, NULL, 0);
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if (code == NULL)
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goto error;
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free(text);
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text = NULL;
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marshalled = PyMarshal_WriteObjectToString(code, Py_MARSHAL_VERSION);
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Py_CLEAR(code);
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if (marshalled == NULL)
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goto error;
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assert(PyBytes_CheckExact(marshalled));
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data = (unsigned char *) PyBytes_AS_STRING(marshalled);
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data_size = PyBytes_GET_SIZE(marshalled);
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/* Open the file in text mode. The hg checkout should be using the eol extension,
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which in turn should cause the EOL style match the C library's text mode */
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outfile = fopen(outpath, "w");
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if (outfile == NULL) {
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fprintf(stderr, "cannot open '%s' for writing\n", outpath);
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goto error;
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}
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fprintf(outfile, "%s\n", header);
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for (i = n = 0; name[i] != '\0'; i++) {
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if (name[i] != '.') {
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buf[n++] = name[i];
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}
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}
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buf[n] = '\0';
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fprintf(outfile, "const unsigned char _Py_M__%s[] = {\n", buf);
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for (n = 0; n < data_size; n += 16) {
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size_t i, end = Py_MIN(n + 16, data_size);
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fprintf(outfile, " ");
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for (i = n; i < end; i++) {
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fprintf(outfile, "%u,", (unsigned int) data[i]);
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}
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fprintf(outfile, "\n");
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}
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fprintf(outfile, "};\n");
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Py_CLEAR(marshalled);
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Py_Finalize();
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if (outfile) {
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if (ferror(outfile)) {
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fprintf(stderr, "error when writing to '%s'\n", outpath);
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goto error;
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}
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fclose(outfile);
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}
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return 0;
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error:
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PyErr_Print();
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Py_Finalize();
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if (infile)
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fclose(infile);
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if (outfile)
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fclose(outfile);
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if (text)
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free(text);
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if (marshalled)
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Py_DECREF(marshalled);
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return 1;
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}
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