10725055929

Committed 05 Sep 2024 05:14PM UTC coverage: 92.705% (-0.09%) from 92.796%

Build # 10725055929

Build Type

push

github

Committed by

Buristan

Commit Message

Limit number of string format elements to compile.

Reported by pwnhacker0x18.

(cherry picked from commit 4fc48c50f)

When compiling `string.format()` with a huge sequence of elements, it is
possible that too many KGC IRs underflow the IR buffer. This patch
limits the maximum number of `string.format()` elements to be compiled
to 100.

Sergey Kaplun:
* added the description and the test for the problem

Part of tarantool/tarantool#10199

Run Details

5674 of 6026 branches covered (94.16%)

Branch coverage included in aggregate %.

2 of 2 new or added lines in 1 file covered. (100.0%)

25 existing lines in 5 files now uncovered.

21636 of 23433 relevant lines covered (92.33%)

2939612.27 hits per line

Source File
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91.96

/src/luajit.c

/*
** LuaJIT frontend. Runs commands, scripts, read-eval-print (REPL) etc.
** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
**
** Major portions taken verbatim or adapted from the Lua interpreter.
** Copyright (C) 1994-2008 Lua.org, PUC-Rio. See Copyright Notice in lua.h
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define luajit_c

#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
#include "luajit.h"

#include "lj_arch.h"

#if LJ_TARGET_POSIX
#include <unistd.h>
#define lua_stdin_is_tty()        isatty(0)
#elif LJ_TARGET_WINDOWS
#include <io.h>
#ifdef __BORLANDC__
#define lua_stdin_is_tty()        isatty(_fileno(stdin))
#else
#define lua_stdin_is_tty()        _isatty(_fileno(stdin))
#endif
#else
#define lua_stdin_is_tty()        1
#endif

#if !LJ_TARGET_CONSOLE
#include <signal.h>
#endif

static lua_State *globalL = NULL;
static const char *progname = LUA_PROGNAME;

#if !LJ_TARGET_CONSOLE
static void lstop(lua_State *L, lua_Debug *ar)
{
  (void)ar;  /* unused arg. */
  lua_sethook(L, NULL, 0, 0);
  /* Avoid luaL_error -- a C hook doesn't add an extra frame. */
  luaL_where(L, 0);
  lua_pushfstring(L, "%sinterrupted!", lua_tostring(L, -1));
  lua_error(L);
}

static void laction(int i)
{
  signal(i, SIG_DFL); /* if another SIGINT happens before lstop,
                         terminate process (default action) */
  lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
}
#endif

static void print_usage(void)
{
  fputs("usage: ", stderr);
  fputs(progname, stderr);
  fputs(" [options]... [script [args]...].\n"
  "Available options are:\n"
  "  -e chunk  Execute string " LUA_QL("chunk") ".\n"
  "  -l name   Require library " LUA_QL("name") ".\n"
  "  -b ...    Save or list bytecode.\n"
  "  -j cmd    Perform LuaJIT control command.\n"
  "  -O[opt]   Control LuaJIT optimizations.\n"
  "  -i        Enter interactive mode after executing " LUA_QL("script") ".\n"
  "  -v        Show version information.\n"
  "  -t<cmd>   Execute tool.\n"
  "  -E        Ignore environment variables.\n"
  "  --        Stop handling options.\n"
  "  -         Execute stdin and stop handling options.\n", stderr);
  fflush(stderr);
}

static void print_tools_usage(void)
{
  fputs("usage: ", stderr);
  fputs(progname, stderr);
  fputs(" -t<cmd>\n"
  "Available tools are:\n"
  "  -m [--leak-only] input  Memprof profile data parser.\n"
  "  -s input                Sysprof profile data parser.\n", stderr);
  fflush(stderr);
}

static void l_message(const char *pname, const char *msg)
{
  if (pname) { fputs(pname, stderr); fputc(':', stderr); fputc(' ', stderr); }
  fputs(msg, stderr); fputc('\n', stderr);
  fflush(stderr);
}

static int report(lua_State *L, int status)
{
  if (status && !lua_isnil(L, -1)) {
    const char *msg = lua_tostring(L, -1);
    if (msg == NULL) msg = "(error object is not a string)";
    l_message(progname, msg);
    lua_pop(L, 1);
  }
  return status;
}

static int traceback(lua_State *L)
{
  if (!lua_isstring(L, 1)) { /* Non-string error object? Try metamethod. */
    if (lua_isnoneornil(L, 1) ||
        !luaL_callmeta(L, 1, "__tostring") ||
        !lua_isstring(L, -1))
      return 1;  /* Return non-string error object. */
    lua_remove(L, 1);  /* Replace object by result of __tostring metamethod. */
  }
  luaL_traceback(L, L, lua_tostring(L, 1), 1);
  return 1;
}

static int docall(lua_State *L, int narg, int clear)
{
  int status;
  int base = lua_gettop(L) - narg;  /* function index */
  lua_pushcfunction(L, traceback);  /* push traceback function */
  lua_insert(L, base);  /* put it under chunk and args */
#if !LJ_TARGET_CONSOLE
  signal(SIGINT, laction);
#endif
  status = lua_pcall(L, narg, (clear ? 0 : LUA_MULTRET), base);
#if !LJ_TARGET_CONSOLE
  signal(SIGINT, SIG_DFL);
#endif
  lua_remove(L, base);  /* remove traceback function */
  /* force a complete garbage collection in case of errors */
  if (status != LUA_OK) lua_gc(L, LUA_GCCOLLECT, 0);
  return status;
}

static void print_version(void)
{
  fputs(LUAJIT_VERSION " -- " LUAJIT_COPYRIGHT ". " LUAJIT_URL "\n", stdout);
}

static void print_jit_status(lua_State *L)
{
  int n;
  const char *s;
  lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
  lua_getfield(L, -1, "jit");  /* Get jit.* module table. */
  lua_remove(L, -2);
  lua_getfield(L, -1, "status");
  lua_remove(L, -2);
  n = lua_gettop(L);
  lua_call(L, 0, LUA_MULTRET);
  fputs(lua_toboolean(L, n) ? "JIT: ON" : "JIT: OFF", stdout);
  for (n++; (s = lua_tostring(L, n)); n++) {
    putc(' ', stdout);
    fputs(s, stdout);
  }
  putc('\n', stdout);
}

static void createargtable(lua_State *L, char **argv, int argc, int argf)
{
  int i;
  lua_createtable(L, argc - argf, argf);
  for (i = 0; i < argc; i++) {
    lua_pushstring(L, argv[i]);
    lua_rawseti(L, -2, i - argf);
  }
  lua_setglobal(L, "arg");
}

static int dofile(lua_State *L, const char *name)
{
  int status = luaL_loadfile(L, name) || docall(L, 0, 1);
  return report(L, status);
}

static int dostring(lua_State *L, const char *s, const char *name)
{
  int status = luaL_loadbuffer(L, s, strlen(s), name) || docall(L, 0, 1);
  return report(L, status);
}

static int dolibrary(lua_State *L, const char *name)
{
  lua_getglobal(L, "require");
  lua_pushstring(L, name);
  return report(L, docall(L, 1, 1));
}

static void write_prompt(lua_State *L, int firstline)
{
  const char *p;
  lua_getfield(L, LUA_GLOBALSINDEX, firstline ? "_PROMPT" : "_PROMPT2");
  p = lua_tostring(L, -1);
  if (p == NULL) p = firstline ? LUA_PROMPT : LUA_PROMPT2;
  fputs(p, stdout);
  fflush(stdout);
  lua_pop(L, 1);  /* remove global */
}

static int incomplete(lua_State *L, int status)
{
  if (status == LUA_ERRSYNTAX) {
    size_t lmsg;
    const char *msg = lua_tolstring(L, -1, &lmsg);
    const char *tp = msg + lmsg - (sizeof(LUA_QL("<eof>")) - 1);
    if (strstr(msg, LUA_QL("<eof>")) == tp) {
      lua_pop(L, 1);
      return 1;
    }
  }
  return 0;  /* else... */
}

static int pushline(lua_State *L, int firstline)
{
  char buf[LUA_MAXINPUT];
  write_prompt(L, firstline);
  if (fgets(buf, LUA_MAXINPUT, stdin)) {
    size_t len = strlen(buf);
    if (len > 0 && buf[len-1] == '\n')
      buf[len-1] = '\0';
    if (firstline && buf[0] == '=')
      lua_pushfstring(L, "return %s", buf+1);
    else
      lua_pushstring(L, buf);
    return 1;
  }
  return 0;
}

static int loadline(lua_State *L)
{
  int status;
  lua_settop(L, 0);
  if (!pushline(L, 1))
    return -1;  /* no input */
  for (;;) {  /* repeat until gets a complete line */
    status = luaL_loadbuffer(L, lua_tostring(L, 1), lua_strlen(L, 1), "=stdin");
    if (!incomplete(L, status)) break;  /* cannot try to add lines? */
    if (!pushline(L, 0))  /* no more input? */
      return -1;
    lua_pushliteral(L, "\n");  /* add a new line... */
    lua_insert(L, -2);  /* ...between the two lines */
    lua_concat(L, 3);  /* join them */
  }
  lua_remove(L, 1);  /* remove line */
  return status;
}

static void dotty(lua_State *L)
{
  int status;
  const char *oldprogname = progname;
  progname = NULL;
  while ((status = loadline(L)) != -1) {
    if (status == LUA_OK) status = docall(L, 0, 0);
    report(L, status);
    if (status == LUA_OK && lua_gettop(L) > 0) {  /* any result to print? */
      lua_getglobal(L, "print");
      lua_insert(L, 1);
      if (lua_pcall(L, lua_gettop(L)-1, 0, 0) != 0)
        l_message(progname,
          lua_pushfstring(L, "error calling " LUA_QL("print") " (%s)",
                              lua_tostring(L, -1)));
    }
  }
  lua_settop(L, 0);  /* clear stack */
  fputs("\n", stdout);
  fflush(stdout);
  progname = oldprogname;
}

static int handle_script(lua_State *L, char **argx)
{
  int status;
  const char *fname = argx[0];
  if (strcmp(fname, "-") == 0 && strcmp(argx[-1], "--") != 0)
    fname = NULL;  /* stdin */
  status = luaL_loadfile(L, fname);
  if (status == LUA_OK) {
    /* Fetch args from arg table. LUA_INIT or -e might have changed them. */
    int narg = 0;
    lua_getglobal(L, "arg");
    if (lua_istable(L, -1)) {
      do {
        narg++;
        lua_rawgeti(L, -narg, narg);
      } while (!lua_isnil(L, -1));
      lua_pop(L, 1);
      lua_remove(L, -narg);
      narg--;
    } else {
      lua_pop(L, 1);
    }
    status = docall(L, narg, 0);
  }
  return report(L, status);
}

/* Load add-on module. */
static int loadjitmodule(lua_State *L)
{
  lua_getglobal(L, "require");
  lua_pushliteral(L, "jit.");
  lua_pushvalue(L, -3);
  lua_concat(L, 2);
  if (lua_pcall(L, 1, 1, 0)) {
    const char *msg = lua_tostring(L, -1);
    if (msg && !strncmp(msg, "module ", 7))
      goto nomodule;
    return report(L, 1);
  }
  lua_getfield(L, -1, "start");
  if (lua_isnil(L, -1)) {
  nomodule:
    l_message(progname,
              "unknown luaJIT command or jit.* modules not installed");
    return 1;
  }
  lua_remove(L, -2);  /* Drop module table. */
  return 0;
}

/* Run command with options. */
static int runcmdopt(lua_State *L, const char *opt)
{
  int narg = 0;
  if (opt && *opt) {
    for (;;) {  /* Split arguments. */
      const char *p = strchr(opt, ',');
      narg++;
      if (!p) break;
      if (p == opt)
        lua_pushnil(L);
      else
        lua_pushlstring(L, opt, (size_t)(p - opt));
      opt = p + 1;
    }
    if (*opt)
      lua_pushstring(L, opt);
    else
      lua_pushnil(L);
  }
  return report(L, lua_pcall(L, narg, 0, 0));
}

/* JIT engine control command: try jit library first or load add-on module. */
static int dojitcmd(lua_State *L, const char *cmd)
{
  const char *opt = strchr(cmd, '=');
  lua_pushlstring(L, cmd, opt ? (size_t)(opt - cmd) : strlen(cmd));
  lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
  lua_getfield(L, -1, "jit");  /* Get jit.* module table. */
  lua_remove(L, -2);
  lua_pushvalue(L, -2);
  lua_gettable(L, -2);  /* Lookup library function. */
  if (!lua_isfunction(L, -1)) {
    lua_pop(L, 2);  /* Drop non-function and jit.* table, keep module name. */
    if (loadjitmodule(L))
      return 1;
  } else {
    lua_remove(L, -2);  /* Drop jit.* table. */
  }
  lua_remove(L, -2);  /* Drop module name. */
  return runcmdopt(L, opt ? opt+1 : opt);
}

static int runtoolcmd(lua_State *L, const char *tool_name)
{
  lua_getglobal(L, "require");
  lua_pushstring(L, tool_name);
  if (lua_pcall(L, 1, 1, 0)) {
    const char *msg = lua_tostring(L, -1);
    if (msg) {
      if (!strncmp(msg, "module ", 7))
        msg = "unknown luaJIT command or tools not installed";
      l_message(progname, msg);
    }
    return 1;
  }
  lua_getglobal(L, "arg");
  return report(L, lua_pcall(L, 1, 1, 0));
}

static int dotoolcmd(lua_State *L, const char *cmd)
{
  switch (cmd[0]) {
  case 'm':
    return runtoolcmd(L, "memprof");
  case 's':
    return runtoolcmd(L, "sysprof");
  default:
    print_tools_usage();
    break;
  }
  return -1;
}

/* Optimization flags. */
static int dojitopt(lua_State *L, const char *opt)
{
  lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
  lua_getfield(L, -1, "jit.opt");  /* Get jit.opt.* module table. */
  lua_remove(L, -2);
  lua_getfield(L, -1, "start");
  lua_remove(L, -2);
  return runcmdopt(L, opt);
}

/* Save or list bytecode. */
static int dobytecode(lua_State *L, char **argv)
{
  int narg = 0;
  lua_pushliteral(L, "bcsave");
  if (loadjitmodule(L))
    return 1;
  if (argv[0][2]) {
    narg++;
    argv[0][1] = '-';
    lua_pushstring(L, argv[0]+1);
  }
  for (argv++; *argv != NULL; narg++, argv++)
    lua_pushstring(L, *argv);
  report(L, lua_pcall(L, narg, 0, 0));
  return -1;
}

/* check that argument has no extra characters at the end */
#define notail(x)        {if ((x)[2] != '\0') return -1;}

#define FLAGS_INTERACTIVE        1
#define FLAGS_VERSION                2
#define FLAGS_EXEC                4
#define FLAGS_OPTION                8
#define FLAGS_NOENV                16
#define FLAGS_TOOL                32

static int collectargs(char **argv, int *flags)
{
  int i;
  for (i = 1; argv[i] != NULL; i++) {
    if (argv[i][0] != '-')  /* Not an option? */
      return i;
    switch (argv[i][1]) {  /* Check option. */
    case '-':
      notail(argv[i]);
      return i+1;
    case '\0':
      return i;
    case 'i':
      notail(argv[i]);
      *flags |= FLAGS_INTERACTIVE;
      /* fallthrough */
    case 'v':
      notail(argv[i]);
      *flags |= FLAGS_VERSION;
      break;
    case 't':
      *flags |= FLAGS_TOOL;
      return i + 1;
    case 'e':
      *flags |= FLAGS_EXEC;
      /* fallthrough */
    case 'j':  /* LuaJIT extension */
    case 'l':
      *flags |= FLAGS_OPTION;
      if (argv[i][2] == '\0') {
        i++;
        if (argv[i] == NULL) return -1;
      }
      break;
    case 'O': break;  /* LuaJIT extension */
    case 'b':  /* LuaJIT extension */
      if (*flags) return -1;
      *flags |= FLAGS_EXEC;
      return i+1;
    case 'E':
      *flags |= FLAGS_NOENV;
      break;
    default: return -1;  /* invalid option */
    }
  }
  return i;
}

static int runargs(lua_State *L, char **argv, int argn)
{
  int i;
  for (i = 1; i < argn; i++) {
    if (argv[i] == NULL) continue;
    lua_assert(argv[i][0] == '-');
    switch (argv[i][1]) {
    case 'e': {
      const char *chunk = argv[i] + 2;
      if (*chunk == '\0') chunk = argv[++i];
      lua_assert(chunk != NULL);
      if (dostring(L, chunk, "=(command line)") != 0)
        return 1;
      break;
      }
    case 'l': {
      const char *filename = argv[i] + 2;
      if (*filename == '\0') filename = argv[++i];
      lua_assert(filename != NULL);
      if (dolibrary(L, filename))
        return 1;
      break;
      }
    case 'j': {  /* LuaJIT extension. */
      const char *cmd = argv[i] + 2;
      if (*cmd == '\0') cmd = argv[++i];
      lua_assert(cmd != NULL);
      if (dojitcmd(L, cmd))
        return 1;
      break;
      }
    case 't': { /* Tarantool's fork extension. */
      const char *cmd = argv[i] + 2;
      return dotoolcmd(L, cmd) != LUA_OK;
    }
    case 'O':  /* LuaJIT extension. */
      if (dojitopt(L, argv[i] + 2))
        return 1;
      break;
    case 'b':  /* LuaJIT extension. */
      return dobytecode(L, argv+i);
    default: break;
    }
  }
  return LUA_OK;
}

static int handle_luainit(lua_State *L)
{
#if LJ_TARGET_CONSOLE
  const char *init = NULL;
#else
  const char *init = getenv(LUA_INIT);
#endif
  if (init == NULL)
    return LUA_OK;
  else if (init[0] == '@')
    return dofile(L, init+1);
  else
    return dostring(L, init, "=" LUA_INIT);
}

static struct Smain {
  char **argv;
  int argc;
  int status;
} smain;

static int pmain(lua_State *L)
{
  struct Smain *s = &smain;
  char **argv = s->argv;
  int argn;
  int flags = 0;
  globalL = L;
  if (argv[0] && argv[0][0]) progname = argv[0];

  LUAJIT_VERSION_SYM();  /* Linker-enforced version check. */

  argn = collectargs(argv, &flags);
  if (argn < 0) {  /* Invalid args? */
    print_usage();
    s->status = 1;
    return 0;
  }

  if ((flags & FLAGS_NOENV)) {
    lua_pushboolean(L, 1);
    lua_setfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
  }

  /* Stop collector during library initialization. */
  lua_gc(L, LUA_GCSTOP, 0);
  luaL_openlibs(L);
  lua_gc(L, LUA_GCRESTART, -1);

  createargtable(L, argv, s->argc, (flags & FLAGS_TOOL) ? argn - 1 : argn);

  if (!(flags & FLAGS_NOENV)) {
    s->status = handle_luainit(L);
    if (s->status != LUA_OK) return 0;
  }

  if ((flags & FLAGS_VERSION)) print_version();

  s->status = runargs(L, argv, argn);
  if (s->status != LUA_OK) return 0;

  if (s->argc > argn) {
    s->status = handle_script(L, argv + argn);
    if (s->status != LUA_OK) return 0;
  }

  if ((flags & FLAGS_INTERACTIVE)) {
    print_jit_status(L);
    dotty(L);
  } else if (s->argc == argn && !(flags & (FLAGS_EXEC|FLAGS_VERSION))) {
    if (lua_stdin_is_tty()) {
      print_version();
      print_jit_status(L);
      dotty(L);
    } else {
      dofile(L, NULL);  /* Executes stdin as a file. */
    }
  }
  return 0;
}

int main(int argc, char **argv)
{
  int status;
  lua_State *L = lua_open();
  if (L == NULL) {
    l_message(argv[0], "cannot create state: not enough memory");
    return EXIT_FAILURE;
  }
  smain.argc = argc;
  smain.argv = argv;
  status = lua_cpcall(L, pmain, NULL);
  report(L, status);
  lua_close(L);
  return (status || smain.status > 0) ? EXIT_FAILURE : EXIT_SUCCESS;
}


1	/*
2	** LuaJIT frontend. Runs commands, scripts, read-eval-print (REPL) etc.
3	** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
4	**
5	** Major portions taken verbatim or adapted from the Lua interpreter.
6	** Copyright (C) 1994-2008 Lua.org, PUC-Rio. See Copyright Notice in lua.h
7	*/
8
9	#include <stdio.h>
10	#include <stdlib.h>
11	#include <string.h>
12
13	#define luajit_c
14
15	#include "lua.h"
16	#include "lauxlib.h"
17	#include "lualib.h"
18	#include "luajit.h"
19
20	#include "lj_arch.h"
21
22	#if LJ_TARGET_POSIX
23	#include <unistd.h>
24	#define lua_stdin_is_tty() isatty(0)
25	#elif LJ_TARGET_WINDOWS
26	#include <io.h>
27	#ifdef __BORLANDC__
28	#define lua_stdin_is_tty() isatty(_fileno(stdin))
29	#else
30	#define lua_stdin_is_tty() _isatty(_fileno(stdin))
31	#endif
32	#else
33	#define lua_stdin_is_tty() 1
34	#endif
35
36	#if !LJ_TARGET_CONSOLE
37	#include <signal.h>
38	#endif
39
40	static lua_State *globalL = NULL;
41	static const char *progname = LUA_PROGNAME;
42
43	#if !LJ_TARGET_CONSOLE
44	static void lstop(lua_State L, lua_Debug ar)	×
45	{
46	(void)ar; /* unused arg. */	×
47	lua_sethook(L, NULL, 0, 0);	×
48	/* Avoid luaL_error -- a C hook doesn't add an extra frame. */
49	luaL_where(L, 0);	×
50	lua_pushfstring(L, "%sinterrupted!", lua_tostring(L, -1));	×
51	lua_error(L);	×
52	}	×
53
54	static void laction(int i)	×
55	{
56	signal(i, SIG_DFL); /* if another SIGINT happens before lstop,	×
57	terminate process (default action) */
58	lua_sethook(globalL, lstop, LUA_MASKCALL \| LUA_MASKRET \| LUA_MASKCOUNT, 1);	×
59	}	×
60	#endif
61
62	static void print_usage(void)	5✔
63	{
64	fputs("usage: ", stderr);	5✔
65	fputs(progname, stderr);	5✔
66	fputs(" [options]... [script [args]...].\n"	5✔
67	"Available options are:\n"
68	" -e chunk Execute string " LUA_QL("chunk") ".\n"
69	" -l name Require library " LUA_QL("name") ".\n"
70	" -b ... Save or list bytecode.\n"
71	" -j cmd Perform LuaJIT control command.\n"
72	" -O[opt] Control LuaJIT optimizations.\n"
73	" -i Enter interactive mode after executing " LUA_QL("script") ".\n"
74	" -v Show version information.\n"
75	" -t<cmd> Execute tool.\n"
76	" -E Ignore environment variables.\n"
77	" -- Stop handling options.\n"
78	" - Execute stdin and stop handling options.\n", stderr);
79	fflush(stderr);	5✔
80	}	5✔
81
82	static void print_tools_usage(void)	2✔
83	{
84	fputs("usage: ", stderr);	2✔
85	fputs(progname, stderr);	2✔
86	fputs(" -t<cmd>\n"	2✔
87	"Available tools are:\n"
88	" -m [--leak-only] input Memprof profile data parser.\n"
89	" -s input Sysprof profile data parser.\n", stderr);
90	fflush(stderr);	2✔
91	}	2✔
92
93	static void l_message(const char pname, const char msg)	7✔
94	{
95	if (pname) { fputs(pname, stderr); fputc(':', stderr); fputc(' ', stderr); }	7✔
96	fputs(msg, stderr); fputc('\n', stderr);	7✔
97	fflush(stderr);	7✔
98	}	7✔
99
100	static int report(lua_State *L, int status)	613✔
101	{
102	if (status && !lua_isnil(L, -1)) {	613✔
103	const char *msg = lua_tostring(L, -1);	6✔
104	if (msg == NULL) msg = "(error object is not a string)";	6✔
105	l_message(progname, msg);	6✔
106	lua_pop(L, 1);	6✔
107	}
108	return status;	613✔
109	}
110
111	static int traceback(lua_State *L)	4✔
112	{
113	if (!lua_isstring(L, 1)) { /* Non-string error object? Try metamethod. */	4✔
114	if (lua_isnoneornil(L, 1) \|\|	2✔
115	!luaL_callmeta(L, 1, "__tostring") \|\|	1✔
UNCOV 116	!lua_isstring(L, -1))	×
117	return 1; /* Return non-string error object. */	1✔
UNCOV 118	lua_remove(L, 1); /* Replace object by result of __tostring metamethod. */	×
119	}
120	luaL_traceback(L, L, lua_tostring(L, 1), 1);	3✔
121	return 1;	3✔
122	}
123
124	static int docall(lua_State *L, int narg, int clear)	609✔
125	{
126	int status;	609✔
127	int base = lua_gettop(L) - narg; /* function index */	609✔
128	lua_pushcfunction(L, traceback); /* push traceback function */	609✔
129	lua_insert(L, base); /* put it under chunk and args */	609✔
130	#if !LJ_TARGET_CONSOLE
131	signal(SIGINT, laction);	609✔
132	#endif
133	status = lua_pcall(L, narg, (clear ? 0 : LUA_MULTRET), base);	881✔
134	#if !LJ_TARGET_CONSOLE
135	signal(SIGINT, SIG_DFL);	440✔
136	#endif
137	lua_remove(L, base); /* remove traceback function */	440✔
138	/* force a complete garbage collection in case of errors */
139	if (status != LUA_OK) lua_gc(L, LUA_GCCOLLECT, 0);	440✔
140	return status;	440✔
141	}
142
143	static void print_version(void)	8✔
144	{
145	fputs(LUAJIT_VERSION " -- " LUAJIT_COPYRIGHT ". " LUAJIT_URL "\n", stdout);	8✔
146	}	8✔
147
148	static void print_jit_status(lua_State *L)	4✔
149	{
150	int n;	4✔
151	const char *s;	4✔
152	lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");	4✔
153	lua_getfield(L, -1, "jit"); /* Get jit.* module table. */	4✔
154	lua_remove(L, -2);	4✔
155	lua_getfield(L, -1, "status");	4✔
156	lua_remove(L, -2);	4✔
157	n = lua_gettop(L);	4✔
158	lua_call(L, 0, LUA_MULTRET);	4✔
159	fputs(lua_toboolean(L, n) ? "JIT: ON" : "JIT: OFF", stdout);	4✔
160	for (n++; (s = lua_tostring(L, n)); n++) {	60✔
161	putc(' ', stdout);	56✔
162	fputs(s, stdout);	56✔
163	}
164	putc('\n', stdout);	4✔
165	}	4✔
166
167	static void createargtable(lua_State L, char *argv, int argc, int argf)	325✔
168	{
169	int i;	325✔
170	lua_createtable(L, argc - argf, argf);	325✔
171	for (i = 0; i < argc; i++) {	2,093✔
172	lua_pushstring(L, argv[i]);	1,443✔
173	lua_rawseti(L, -2, i - argf);	1,443✔
174	}
175	lua_setglobal(L, "arg");	325✔
176	}	325✔
177
178	static int dofile(lua_State L, const char name)	1✔
179	{
180	int status = luaL_loadfile(L, name) \|\| docall(L, 0, 1);	1✔
181	return report(L, status);	1✔
182	}
183
184	static int dostring(lua_State L, const char s, const char *name)	281✔
185	{
186	int status = luaL_loadbuffer(L, s, strlen(s), name) \|\| docall(L, 0, 1);	281✔
187	return report(L, status);	278✔
188	}
189
190	static int dolibrary(lua_State L, const char name)	57✔
191	{
192	lua_getglobal(L, "require");	57✔
193	lua_pushstring(L, name);	57✔
194	return report(L, docall(L, 1, 1));	57✔
195	}
196
197	static void write_prompt(lua_State *L, int firstline)	131✔
198	{
199	const char *p;	131✔
200	lua_getfield(L, LUA_GLOBALSINDEX, firstline ? "_PROMPT" : "_PROMPT2");	240✔
201	p = lua_tostring(L, -1);	131✔
202	if (p == NULL) p = firstline ? LUA_PROMPT : LUA_PROMPT2;	131✔
203	fputs(p, stdout);	131✔
204	fflush(stdout);	131✔
205	lua_pop(L, 1); /* remove global */	131✔
206	}	131✔
207
208	static int incomplete(lua_State *L, int status)	127✔
209	{
210	if (status == LUA_ERRSYNTAX) {	127✔
211	size_t lmsg;	109✔
212	const char *msg = lua_tolstring(L, -1, &lmsg);	109✔
213	const char *tp = msg + lmsg - (sizeof(LUA_QL("<eof>")) - 1);	109✔
214	if (strstr(msg, LUA_QL("<eof>")) == tp) {	109✔
215	lua_pop(L, 1);	109✔
216	return 1;	109✔
217	}
218	}
219	return 0; /* else... */
220	}
221
222	static int pushline(lua_State *L, int firstline)	131✔
223	{
224	char buf[LUA_MAXINPUT];	131✔
225	write_prompt(L, firstline);	131✔
226	if (fgets(buf, LUA_MAXINPUT, stdin)) {	131✔
227	size_t len = strlen(buf);	127✔
228	if (len > 0 && buf[len-1] == '\n')	127✔
229	buf[len-1] = '\0';	125✔
230	if (firstline && buf[0] == '=')	127✔
231	lua_pushfstring(L, "return %s", buf+1);	5✔
232	else
233	lua_pushstring(L, buf);	122✔
234	return 1;	127✔
235	}
236	return 0;
237	}
238
239	static int loadline(lua_State *L)	22✔
240	{
241	int status;	22✔
242	lua_settop(L, 0);	22✔
243	if (!pushline(L, 1))	22✔
244	return -1; /* no input */
245	for (;;) { /* repeat until gets a complete line */	236✔
246	status = luaL_loadbuffer(L, lua_tostring(L, 1), lua_strlen(L, 1), "=stdin");	127✔
247	if (!incomplete(L, status)) break; /* cannot try to add lines? */	127✔
248	if (!pushline(L, 0)) /* no more input? */	109✔
249	return -1;
250	lua_pushliteral(L, "\n"); /* add a new line... */	109✔
251	lua_insert(L, -2); /* ...between the two lines */	109✔
252	lua_concat(L, 3); /* join them */	109✔
253	}
254	lua_remove(L, 1); /* remove line */	18✔
255	return status;	18✔
256	}
257
258	static void dotty(lua_State *L)	4✔
259	{
260	int status;	4✔
261	const char *oldprogname = progname;	4✔
262	progname = NULL;	4✔
263	while ((status = loadline(L)) != -1) {	26✔
264	if (status == LUA_OK) status = docall(L, 0, 0);	18✔
265	report(L, status);	18✔
266	if (status == LUA_OK && lua_gettop(L) > 0) { /* any result to print? */	18✔
267	lua_getglobal(L, "print");	5✔
268	lua_insert(L, 1);	5✔
269	if (lua_pcall(L, lua_gettop(L)-1, 0, 0) != 0)	5✔
270	l_message(progname,	×
271	lua_pushfstring(L, "error calling " LUA_QL("print") " (%s)",
272	lua_tostring(L, -1)));
273	}
274	}
275	lua_settop(L, 0); /* clear stack */	4✔
276	fputs("\n", stdout);	4✔
277	fflush(stdout);	4✔
278	progname = oldprogname;	4✔
279	}	4✔
280
281	static int handle_script(lua_State L, char *argx)	255✔
282	{
283	int status;	255✔
284	const char *fname = argx[0];	255✔
285	if (strcmp(fname, "-") == 0 && strcmp(argx[-1], "--") != 0)	255✔
286	fname = NULL; /* stdin */	4✔
287	status = luaL_loadfile(L, fname);	255✔
288	if (status == LUA_OK) {	255✔
289	/* Fetch args from arg table. LUA_INIT or -e might have changed them. */
290	int narg = 0;	254✔
291	lua_getglobal(L, "arg");	254✔
292	if (lua_istable(L, -1)) {	254✔
293	do {	313✔
294	narg++;	313✔
295	lua_rawgeti(L, -narg, narg);	313✔
296	} while (!lua_isnil(L, -1));	313✔
297	lua_pop(L, 1);	254✔
298	lua_remove(L, -narg);	254✔
299	narg--;	254✔
300	} else {
301	lua_pop(L, 1);	×
302	}
303	status = docall(L, narg, 0);	254✔
304	}
305	return report(L, status);	89✔
306	}
307
308	/* Load add-on module. */
309	static int loadjitmodule(lua_State *L)	18✔
310	{
311	lua_getglobal(L, "require");	18✔
312	lua_pushliteral(L, "jit.");	18✔
313	lua_pushvalue(L, -3);	18✔
314	lua_concat(L, 2);	18✔
315	if (lua_pcall(L, 1, 1, 0)) {	18✔
316	const char *msg = lua_tostring(L, -1);	1✔
317	if (msg && !strncmp(msg, "module ", 7))	1✔
318	goto nomodule;	1✔
319	return report(L, 1);	×
320	}
321	lua_getfield(L, -1, "start");	17✔
322	if (lua_isnil(L, -1)) {	17✔
323	nomodule:	×
324	l_message(progname,	1✔
325	"unknown luaJIT command or jit.* modules not installed");
326	return 1;	1✔
327	}
328	lua_remove(L, -2); /* Drop module table. */	17✔
329	return 0;	17✔
330	}
331
332	/* Run command with options. */
333	static int runcmdopt(lua_State L, const char opt)	10✔
334	{
335	int narg = 0;	10✔
336	if (opt && *opt) {	10✔
337	for (;;) { /* Split arguments. */	10✔
338	const char *p = strchr(opt, ',');	8✔
339	narg++;	8✔
340	if (!p) break;	8✔
341	if (p == opt)	2✔
342	lua_pushnil(L);	×
343	else
344	lua_pushlstring(L, opt, (size_t)(p - opt));	2✔
345	opt = p + 1;	2✔
346	}
347	if (*opt)	6✔
348	lua_pushstring(L, opt);	6✔
349	else
350	lua_pushnil(L);	×
351	}
352	return report(L, lua_pcall(L, narg, 0, 0));	10✔
353	}
354
355	/* JIT engine control command: try jit library first or load add-on module. */
356	static int dojitcmd(lua_State L, const char cmd)	4✔
357	{
358	const char *opt = strchr(cmd, '=');	4✔
359	lua_pushlstring(L, cmd, opt ? (size_t)(opt - cmd) : strlen(cmd));	4✔
360	lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");	4✔
361	lua_getfield(L, -1, "jit"); /* Get jit.* module table. */	4✔
362	lua_remove(L, -2);	4✔
363	lua_pushvalue(L, -2);	4✔
364	lua_gettable(L, -2); /* Lookup library function. */	4✔
365	if (!lua_isfunction(L, -1)) {	4✔
366	lua_pop(L, 2); /* Drop non-function and jit.* table, keep module name. */	1✔
367	if (loadjitmodule(L))	1✔
368	return 1;
369	} else {
370	lua_remove(L, -2); /* Drop jit.* table. */	3✔
371	}
372	lua_remove(L, -2); /* Drop module name. */	3✔
373	return runcmdopt(L, opt ? opt+1 : opt);	3✔
374	}
375
376	static int runtoolcmd(lua_State L, const char tool_name)	18✔
377	{
378	lua_getglobal(L, "require");	18✔
379	lua_pushstring(L, tool_name);	18✔
380	if (lua_pcall(L, 1, 1, 0)) {	18✔
381	const char *msg = lua_tostring(L, -1);	×
382	if (msg) {	×
383	if (!strncmp(msg, "module ", 7))	×
384	msg = "unknown luaJIT command or tools not installed";	×
385	l_message(progname, msg);	×
386	}
387	return 1;	×
388	}
389	lua_getglobal(L, "arg");	18✔
390	return report(L, lua_pcall(L, 1, 1, 0));	18✔
391	}
392
393	static int dotoolcmd(lua_State L, const char cmd)
394	{
395	switch (cmd[0]) {
396	case 'm':
397	return runtoolcmd(L, "memprof");
398	case 's':
399	return runtoolcmd(L, "sysprof");
400	default:
401	print_tools_usage();
402	break;
403	}
404	return -1;
405	}
406
407	/* Optimization flags. */
408	static int dojitopt(lua_State L, const char opt)	7✔
409	{
410	lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");	7✔
411	lua_getfield(L, -1, "jit.opt"); /* Get jit.opt.* module table. */	7✔
412	lua_remove(L, -2);	7✔
413	lua_getfield(L, -1, "start");	7✔
414	lua_remove(L, -2);	7✔
415	return runcmdopt(L, opt);	7✔
416	}
417
418	/* Save or list bytecode. */
419	static int dobytecode(lua_State L, char *argv)	17✔
420	{
421	int narg = 0;	17✔
422	lua_pushliteral(L, "bcsave");	17✔
423	if (loadjitmodule(L))	17✔
424	return 1;
425	if (argv[0][2]) {	17✔
426	narg++;	4✔
427	argv[0][1] = '-';	4✔
428	lua_pushstring(L, argv[0]+1);	4✔
429	}
430	for (argv++; *argv != NULL; narg++, argv++)	67✔
431	lua_pushstring(L, *argv);	50✔
432	report(L, lua_pcall(L, narg, 0, 0));	17✔
433	return -1;	17✔
434	}
435
436	/* check that argument has no extra characters at the end */
437	#define notail(x) {if ((x)[2] != '\0') return -1;}
438
439	#define FLAGS_INTERACTIVE 1
440	#define FLAGS_VERSION 2
441	#define FLAGS_EXEC 4
442	#define FLAGS_OPTION 8
443	#define FLAGS_NOENV 16
444	#define FLAGS_TOOL 32
445
446	static int collectargs(char *argv, int flags)	330✔
447	{
448	int i;	330✔
449	for (i = 1; argv[i] != NULL; i++) {	688✔
450	if (argv[i][0] != '-') /* Not an option? */	658✔
451	return i;	252✔
452	switch (argv[i][1]) { /* Check option. */	406✔
453	case '-':	3✔
454	notail(argv[i]);	3✔
455	return i+1;	2✔
456	case '\0':
457	return i;
458	case 'i':	4✔
459	notail(argv[i]);	4✔
460	*flags \|= FLAGS_INTERACTIVE;	4✔
461	/* fallthrough */
462	case 'v':	8✔
463	notail(argv[i]);	8✔
464	*flags \|= FLAGS_VERSION;	8✔
465	break;	8✔
466	case 't':	20✔
467	*flags \|= FLAGS_TOOL;	20✔
468	return i + 1;	20✔
469	case 'e':	283✔
470	*flags \|= FLAGS_EXEC;	283✔
471	/* fallthrough */
472	case 'j': /* LuaJIT extension */	344✔
473	case 'l':
474	*flags \|= FLAGS_OPTION;	344✔
475	if (argv[i][2] == '\0') {	344✔
476	i++;	330✔
477	if (argv[i] == NULL) return -1;	330✔
478	}
479	break;
480	case 'O': break; /* LuaJIT extension */
481	case 'b': /* LuaJIT extension */	17✔
482	if (*flags) return -1;	17✔
483	*flags \|= FLAGS_EXEC;	17✔
484	return i+1;	17✔
485	case 'E':	1✔
486	*flags \|= FLAGS_NOENV;	1✔
487	break;	1✔
488	default: return -1; /* invalid option */
489	}
490	}
491	return i;
492	}
493
494	static int runargs(lua_State L, char *argv, int argn)	325✔
495	{
496	int i;	325✔
497	for (i = 1; i < argn; i++) {	677✔
498	if (argv[i] == NULL) continue;	397✔
499	lua_assert(argv[i][0] == '-');	397✔
500	switch (argv[i][1]) {	397✔
501	case 'e': {	281✔
502	const char *chunk = argv[i] + 2;	281✔
503	if (*chunk == '\0') chunk = argv[++i];	281✔
504	lua_assert(chunk != NULL);	281✔
505	if (dostring(L, chunk, "=(command line)") != 0)	281✔
506	return 1;
507	break;
508	}
509	case 'l': {	57✔
510	const char *filename = argv[i] + 2;	57✔
511	if (*filename == '\0') filename = argv[++i];	57✔
512	lua_assert(filename != NULL);	57✔
513	if (dolibrary(L, filename))	57✔
514	return 1;
515	break;
516	}
517	case 'j': { /* LuaJIT extension. */	4✔
518	const char *cmd = argv[i] + 2;	4✔
519	if (*cmd == '\0') cmd = argv[++i];	4✔
520	lua_assert(cmd != NULL);	4✔
521	if (dojitcmd(L, cmd))	4✔
522	return 1;
523	break;
524	}
525	case 't': { /* Tarantool's fork extension. */	20✔
526	const char *cmd = argv[i] + 2;	20✔
527	return dotoolcmd(L, cmd) != LUA_OK;	20✔
528	}
529	case 'O': /* LuaJIT extension. */	7✔
530	if (dojitopt(L, argv[i] + 2))	7✔
531	return 1;
532	break;
533	case 'b': /* LuaJIT extension. */	17✔
534	return dobytecode(L, argv+i);	17✔
535	default: break;
536	}
537	}
538	return LUA_OK;
539	}
540
541	static int handle_luainit(lua_State *L)	324✔
542	{
543	#if LJ_TARGET_CONSOLE
544	const char *init = NULL;
545	#else
546	const char *init = getenv(LUA_INIT);	324✔
547	#endif
548	if (init == NULL)	324✔
549	return LUA_OK;
550	else if (init[0] == '@')	×
551	return dofile(L, init+1);	×
552	else
553	return dostring(L, init, "=" LUA_INIT);	×
554	}
555
556	static struct Smain {
557	char **argv;
558	int argc;
559	int status;
560	} smain;
561
562	static int pmain(lua_State *L)	330✔
563	{
564	struct Smain *s = &smain;	330✔
565	char **argv = s->argv;	330✔
566	int argn;	330✔
567	int flags = 0;	330✔
568	globalL = L;	330✔
569	if (argv[0] && argv[0][0]) progname = argv[0];	330✔
570
571	LUAJIT_VERSION_SYM(); /* Linker-enforced version check. */	330✔
572
573	argn = collectargs(argv, &flags);	330✔
574	if (argn < 0) { /* Invalid args? */	330✔
575	print_usage();	5✔
576	s->status = 1;	5✔
577	return 0;	5✔
578	}
579
580	if ((flags & FLAGS_NOENV)) {	325✔
581	lua_pushboolean(L, 1);	1✔
582	lua_setfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");	1✔
583	}
584
585	/* Stop collector during library initialization. */
586	lua_gc(L, LUA_GCSTOP, 0);	325✔
587	luaL_openlibs(L);	325✔
588	lua_gc(L, LUA_GCRESTART, -1);	325✔
589
590	createargtable(L, argv, s->argc, (flags & FLAGS_TOOL) ? argn - 1 : argn);	325✔
591
592	if (!(flags & FLAGS_NOENV)) {	325✔
593	s->status = handle_luainit(L);	324✔
594	if (s->status != LUA_OK) return 0;	324✔
595	}
596
597	if ((flags & FLAGS_VERSION)) print_version();	325✔
598
599	s->status = runargs(L, argv, argn);	325✔
600	if (s->status != LUA_OK) return 0;	304✔
601
602	if (s->argc > argn) {	280✔
603	s->status = handle_script(L, argv + argn);	255✔
604	if (s->status != LUA_OK) return 0;	89✔
605	}
606
607	if ((flags & FLAGS_INTERACTIVE)) {	112✔
608	print_jit_status(L);	4✔
609	dotty(L);	4✔
610	} else if (s->argc == argn && !(flags & (FLAGS_EXEC\|FLAGS_VERSION))) {	108✔
611	if (lua_stdin_is_tty()) {	1✔
612	print_version();	×
613	print_jit_status(L);	×
614	dotty(L);	×
615	} else {
616	dofile(L, NULL); /* Executes stdin as a file. */	1✔
617	}
618	}
619	return 0;
620	}
621
622	int main(int argc, char **argv)	330✔
623	{
624	int status;	330✔
625	lua_State *L = lua_open();	330✔
626	if (L == NULL) {	330✔
627	l_message(argv[0], "cannot create state: not enough memory");	×
628	return EXIT_FAILURE;	×
629	}
630	smain.argc = argc;	330✔
631	smain.argv = argv;	330✔
632	status = lua_cpcall(L, pmain, NULL);	330✔
633	report(L, status);	143✔
634	lua_close(L);	143✔
635	return (status \|\| smain.status > 0) ? EXIT_FAILURE : EXIT_SUCCESS;	143✔
636	}
637

tarantool / luajit / 10725055929

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