11774765987

Committed 11 Nov 2024 08:22AM UTC coverage: 92.931% (-0.008%) from 92.939%

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tmp commit for ci check

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65.41

/src/lj_clib.c

/*
** FFI C library loader.
** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
*/

#include "lj_obj.h"

#if LJ_HASFFI

#include "lj_gc.h"
#include "lj_err.h"
#include "lj_tab.h"
#include "lj_str.h"
#include "lj_udata.h"
#include "lj_ctype.h"
#include "lj_cconv.h"
#include "lj_cdata.h"
#include "lj_clib.h"
#include "lj_strfmt.h"

/* -- OS-specific functions ----------------------------------------------- */

#if LJ_TARGET_DLOPEN

#include <dlfcn.h>
#include <stdio.h>

#if defined(RTLD_DEFAULT)
#define CLIB_DEFHANDLE        RTLD_DEFAULT
#elif LJ_TARGET_OSX || LJ_TARGET_BSD
#define CLIB_DEFHANDLE        ((void *)(intptr_t)-2)
#else
#define CLIB_DEFHANDLE        NULL
#endif

LJ_NORET LJ_NOINLINE static void clib_error_(lua_State *L)
{
  lj_err_callermsg(L, dlerror());
}

#define clib_error(L, fmt, name)        clib_error_(L)

#if LJ_TARGET_CYGWIN
#define CLIB_SOPREFIX        "cyg"
#else
#define CLIB_SOPREFIX        "lib"
#endif

#if LJ_TARGET_OSX
#define CLIB_SOEXT        "%s.dylib"
#elif LJ_TARGET_CYGWIN
#define CLIB_SOEXT        "%s.dll"
#else
#define CLIB_SOEXT        "%s.so"
#endif

static const char *clib_extname(lua_State *L, const char *name)
{
  if (!strchr(name, '/')
#if LJ_TARGET_CYGWIN
      && !strchr(name, '\\')
#endif
     ) {
    if (!strchr(name, '.')) {
      name = lj_strfmt_pushf(L, CLIB_SOEXT, name);
      L->top--;
#if LJ_TARGET_CYGWIN
    } else {
      return name;
#endif
    }
    if (!(name[0] == CLIB_SOPREFIX[0] && name[1] == CLIB_SOPREFIX[1] &&
          name[2] == CLIB_SOPREFIX[2])) {
      name = lj_strfmt_pushf(L, CLIB_SOPREFIX "%s", name);
      L->top--;
    }
  }
  return name;
}

/* Check for a recognized ld script line. */
static const char *clib_check_lds(lua_State *L, const char *buf)
{
  char *p, *e;
  if ((!strncmp(buf, "GROUP", 5) || !strncmp(buf, "INPUT", 5)) &&
      (p = strchr(buf, '('))) {
    while (*++p == ' ') ;
    for (e = p; *e && *e != ' ' && *e != ')'; e++) ;
    return strdata(lj_str_new(L, p, e-p));
  }
  return NULL;
}

/* Quick and dirty solution to resolve shared library name from ld script. */
static const char *clib_resolve_lds(lua_State *L, const char *name)
{
  FILE *fp = fopen(name, "r");
  const char *p = NULL;
  if (fp) {
    char buf[256];
    if (fgets(buf, sizeof(buf), fp)) {
      if (!strncmp(buf, "/* GNU ld script", 16)) {  /* ld script magic? */
        while (fgets(buf, sizeof(buf), fp)) {  /* Check all lines. */
          p = clib_check_lds(L, buf);
          if (p) break;
        }
      } else {  /* Otherwise check only the first line. */
        p = clib_check_lds(L, buf);
      }
    }
    fclose(fp);
  }
  return p;
}

static void *clib_loadlib(lua_State *L, const char *name, int global)
{
  void *h = dlopen(clib_extname(L, name),
                   RTLD_LAZY | (global?RTLD_GLOBAL:RTLD_LOCAL));
  if (!h) {
    const char *e, *err = dlerror();
    if (err && *err == '/' && (e = strchr(err, ':')) &&
        (name = clib_resolve_lds(L, strdata(lj_str_new(L, err, e-err))))) {
      h = dlopen(name, RTLD_LAZY | (global?RTLD_GLOBAL:RTLD_LOCAL));
      if (h) return h;
      err = dlerror();
    }
    if (!err) err = "dlopen failed";
    lj_err_callermsg(L, err);
  }
  return h;
}

static void clib_unloadlib(CLibrary *cl)
{
  if (cl->handle && cl->handle != CLIB_DEFHANDLE)
    dlclose(cl->handle);
}

static void *clib_getsym(CLibrary *cl, const char *name)
{
  void *p = dlsym(cl->handle, name);
  return p;
}

#elif LJ_TARGET_WINDOWS

#define WIN32_LEAN_AND_MEAN
#include <windows.h>

#ifndef GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
#define GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS        4
#define GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT        2
BOOL WINAPI GetModuleHandleExA(DWORD, LPCSTR, HMODULE*);
#endif

#define CLIB_DEFHANDLE        ((void *)-1)

/* Default libraries. */
enum {
  CLIB_HANDLE_EXE,
#if !LJ_TARGET_UWP
  CLIB_HANDLE_DLL,
  CLIB_HANDLE_CRT,
  CLIB_HANDLE_KERNEL32,
  CLIB_HANDLE_USER32,
  CLIB_HANDLE_GDI32,
#endif
  CLIB_HANDLE_MAX
};

static void *clib_def_handle[CLIB_HANDLE_MAX];

LJ_NORET LJ_NOINLINE static void clib_error(lua_State *L, const char *fmt,
                                            const char *name)
{
  DWORD err = GetLastError();
#if LJ_TARGET_XBOXONE
  wchar_t wbuf[128];
  char buf[128*2];
  if (!FormatMessageW(FORMAT_MESSAGE_IGNORE_INSERTS|FORMAT_MESSAGE_FROM_SYSTEM,
                      NULL, err, 0, wbuf, sizeof(wbuf)/sizeof(wchar_t), NULL) ||
      !WideCharToMultiByte(CP_ACP, 0, wbuf, 128, buf, 128*2, NULL, NULL))
#else
  char buf[128];
  if (!FormatMessageA(FORMAT_MESSAGE_IGNORE_INSERTS|FORMAT_MESSAGE_FROM_SYSTEM,
                      NULL, err, 0, buf, sizeof(buf), NULL))
#endif
    buf[0] = '\0';
  lj_err_callermsg(L, lj_strfmt_pushf(L, fmt, name, buf));
}

static int clib_needext(const char *s)
{
  while (*s) {
    if (*s == '/' || *s == '\\' || *s == '.') return 0;
    s++;
  }
  return 1;
}

static const char *clib_extname(lua_State *L, const char *name)
{
  if (clib_needext(name)) {
    name = lj_strfmt_pushf(L, "%s.dll", name);
    L->top--;
  }
  return name;
}

static void *clib_loadlib(lua_State *L, const char *name, int global)
{
  DWORD oldwerr = GetLastError();
  void *h = LJ_WIN_LOADLIBA(clib_extname(L, name));
  if (!h) clib_error(L, "cannot load module " LUA_QS ": %s", name);
  SetLastError(oldwerr);
  UNUSED(global);
  return h;
}

static void clib_unloadlib(CLibrary *cl)
{
  if (cl->handle == CLIB_DEFHANDLE) {
#if !LJ_TARGET_UWP
    MSize i;
    for (i = CLIB_HANDLE_KERNEL32; i < CLIB_HANDLE_MAX; i++) {
      void *h = clib_def_handle[i];
      if (h) {
        clib_def_handle[i] = NULL;
        FreeLibrary((HINSTANCE)h);
      }
    }
#endif
  } else if (cl->handle) {
    FreeLibrary((HINSTANCE)cl->handle);
  }
}

#if LJ_TARGET_UWP
EXTERN_C IMAGE_DOS_HEADER __ImageBase;
#endif

static void *clib_getsym(CLibrary *cl, const char *name)
{
  void *p = NULL;
  if (cl->handle == CLIB_DEFHANDLE) {  /* Search default libraries. */
    MSize i;
    for (i = 0; i < CLIB_HANDLE_MAX; i++) {
      HINSTANCE h = (HINSTANCE)clib_def_handle[i];
      if (!(void *)h) {  /* Resolve default library handles (once). */
#if LJ_TARGET_UWP
        h = (HINSTANCE)&__ImageBase;
#else
        switch (i) {
        case CLIB_HANDLE_EXE: GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, NULL, &h); break;
        case CLIB_HANDLE_DLL:
          GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS|GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
                             (const char *)clib_def_handle, &h);
          break;
        case CLIB_HANDLE_CRT:
          GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS|GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
                             (const char *)&_fmode, &h);
          break;
        case CLIB_HANDLE_KERNEL32: h = LJ_WIN_LOADLIBA("kernel32.dll"); break;
        case CLIB_HANDLE_USER32: h = LJ_WIN_LOADLIBA("user32.dll"); break;
        case CLIB_HANDLE_GDI32: h = LJ_WIN_LOADLIBA("gdi32.dll"); break;
        }
        if (!h) continue;
#endif
        clib_def_handle[i] = (void *)h;
      }
      p = (void *)GetProcAddress(h, name);
      if (p) break;
    }
  } else {
    p = (void *)GetProcAddress((HINSTANCE)cl->handle, name);
  }
  return p;
}

#else

#define CLIB_DEFHANDLE        NULL

LJ_NORET LJ_NOINLINE static void clib_error(lua_State *L, const char *fmt,
                                            const char *name)
{
  lj_err_callermsg(L, lj_strfmt_pushf(L, fmt, name, "no support for this OS"));
}

static void *clib_loadlib(lua_State *L, const char *name, int global)
{
  lj_err_callermsg(L, "no support for loading dynamic libraries for this OS");
  UNUSED(name); UNUSED(global);
  return NULL;
}

static void clib_unloadlib(CLibrary *cl)
{
  UNUSED(cl);
}

static void *clib_getsym(CLibrary *cl, const char *name)
{
  UNUSED(cl); UNUSED(name);
  return NULL;
}

#endif

/* -- C library indexing -------------------------------------------------- */

#if LJ_TARGET_X86 && LJ_ABI_WIN
/* Compute argument size for fastcall/stdcall functions. */
static CTSize clib_func_argsize(CTState *cts, CType *ct)
{
  CTSize n = 0;
  while (ct->sib) {
    CType *d;
    ct = ctype_get(cts, ct->sib);
    if (ctype_isfield(ct->info)) {
      d = ctype_rawchild(cts, ct);
      n += ((d->size + 3) & ~3);
    }
  }
  return n;
}
#endif

/* Get redirected or mangled external symbol. */
static const char *clib_extsym(CTState *cts, CType *ct, GCstr *name)
{
  if (ct->sib) {
    CType *ctf = ctype_get(cts, ct->sib);
    if (ctype_isxattrib(ctf->info, CTA_REDIR))
      return strdata(gco2str(gcref(ctf->name)));
  }
  return strdata(name);
}

/* Index a C library by name. */
TValue *lj_clib_index(lua_State *L, CLibrary *cl, GCstr *name)
{
  TValue *tv = lj_tab_setstr(L, cl->cache, name);
  if (LJ_UNLIKELY(tvisnil(tv))) {
    CTState *cts = ctype_cts(L);
    CType *ct;
    CTypeID id = lj_ctype_getname(cts, &ct, name, CLNS_INDEX);
    if (!id)
      lj_err_callerv(L, LJ_ERR_FFI_NODECL, strdata(name));
    if (ctype_isconstval(ct->info)) {
      CType *ctt = ctype_child(cts, ct);
      lj_assertCTS(ctype_isinteger(ctt->info) && ctt->size <= 4,
                   "only 32 bit const supported");  /* NYI */
      if ((ctt->info & CTF_UNSIGNED) && (int32_t)ct->size < 0)
        setnumV(tv, (lua_Number)(uint32_t)ct->size);
      else
        setintV(tv, (int32_t)ct->size);
    } else {
      const char *sym = clib_extsym(cts, ct, name);
#if LJ_TARGET_WINDOWS
      DWORD oldwerr = GetLastError();
#endif
      void *p = clib_getsym(cl, sym);
      GCcdata *cd;
      lj_assertCTS(ctype_isfunc(ct->info) || ctype_isextern(ct->info),
                   "unexpected ctype %08x in clib", ct->info);
#if LJ_TARGET_X86 && LJ_ABI_WIN
      /* Retry with decorated name for fastcall/stdcall functions. */
      if (!p && ctype_isfunc(ct->info)) {
        CTInfo cconv = ctype_cconv(ct->info);
        if (cconv == CTCC_FASTCALL || cconv == CTCC_STDCALL) {
          CTSize sz = clib_func_argsize(cts, ct);
          const char *symd = lj_strfmt_pushf(L,
                               cconv == CTCC_FASTCALL ? "@%s@%d" : "_%s@%d",
                               sym, sz);
          L->top--;
          p = clib_getsym(cl, symd);
        }
      }
#endif
      if (!p)
        clib_error(L, "cannot resolve symbol " LUA_QS ": %s", sym);
#if LJ_TARGET_WINDOWS
      SetLastError(oldwerr);
#endif
      cd = lj_cdata_new(cts, id, CTSIZE_PTR);
      *(void **)cdataptr(cd) = p;
      setcdataV(L, tv, cd);
      lj_gc_anybarriert(L, cl->cache);
    }
  }
  return tv;
}

/* -- C library management ------------------------------------------------ */

/* Create a new CLibrary object and push it on the stack. */
static CLibrary *clib_new(lua_State *L, GCtab *mt)
{
  GCtab *t = lj_tab_new(L, 0, 0);
  GCudata *ud = lj_udata_new(L, sizeof(CLibrary), t);
  CLibrary *cl = (CLibrary *)uddata(ud);
  cl->cache = t;
  ud->udtype = UDTYPE_FFI_CLIB;
  /* NOBARRIER: The GCudata is new (marked white). */
  setgcref(ud->metatable, obj2gco(mt));
  setudataV(L, L->top++, ud);
  return cl;
}

/* Load a C library. */
void lj_clib_load(lua_State *L, GCtab *mt, GCstr *name, int global)
{
  void *handle = clib_loadlib(L, strdata(name), global);
  CLibrary *cl = clib_new(L, mt);
  cl->handle = handle;
}

/* Unload a C library. */
void lj_clib_unload(CLibrary *cl)
{
  clib_unloadlib(cl);
  cl->handle = NULL;
}

/* Create the default C library object. */
void lj_clib_default(lua_State *L, GCtab *mt)
{
  CLibrary *cl = clib_new(L, mt);
  cl->handle = CLIB_DEFHANDLE;
}

#endif

1	/*
2	** FFI C library loader.
3	** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
4	*/
5
6	#include "lj_obj.h"
7
8	#if LJ_HASFFI
9
10	#include "lj_gc.h"
11	#include "lj_err.h"
12	#include "lj_tab.h"
13	#include "lj_str.h"
14	#include "lj_udata.h"
15	#include "lj_ctype.h"
16	#include "lj_cconv.h"
17	#include "lj_cdata.h"
18	#include "lj_clib.h"
19	#include "lj_strfmt.h"
20
21	/* -- OS-specific functions ----------------------------------------------- */
22
23	#if LJ_TARGET_DLOPEN
24
25	#include <dlfcn.h>
26	#include <stdio.h>
27
28	#if defined(RTLD_DEFAULT)
29	#define CLIB_DEFHANDLE RTLD_DEFAULT
30	#elif LJ_TARGET_OSX \|\| LJ_TARGET_BSD
31	#define CLIB_DEFHANDLE ((void *)(intptr_t)-2)
32	#else
33	#define CLIB_DEFHANDLE NULL
34	#endif
35
36	LJ_NORET LJ_NOINLINE static void clib_error_(lua_State *L)	×
37	{
38	lj_err_callermsg(L, dlerror());	×
39	}
40
41	#define clib_error(L, fmt, name) clib_error_(L)
42
43	#if LJ_TARGET_CYGWIN
44	#define CLIB_SOPREFIX "cyg"
45	#else
46	#define CLIB_SOPREFIX "lib"
47	#endif
48
49	#if LJ_TARGET_OSX
50	#define CLIB_SOEXT "%s.dylib"
51	#elif LJ_TARGET_CYGWIN
52	#define CLIB_SOEXT "%s.dll"
53	#else
54	#define CLIB_SOEXT "%s.so"
55	#endif
56
57	static const char clib_extname(lua_State L, const char *name)	11✔
58	{
59	if (!strchr(name, '/')	11✔
60	#if LJ_TARGET_CYGWIN
61	&& !strchr(name, '\\')
62	#endif
63	) {
64	if (!strchr(name, '.')) {	11✔
65	name = lj_strfmt_pushf(L, CLIB_SOEXT, name);	11✔
66	L->top--;	11✔
67	#if LJ_TARGET_CYGWIN
68	} else {
69	return name;
70	#endif
71	}
72	if (!(name[0] == CLIB_SOPREFIX[0] && name[1] == CLIB_SOPREFIX[1] &&	11✔
73	name[2] == CLIB_SOPREFIX[2])) {	6✔
74	name = lj_strfmt_pushf(L, CLIB_SOPREFIX "%s", name);	5✔
75	L->top--;	5✔
76	}
77	}
78	return name;	11✔
79	}
80
81	/* Check for a recognized ld script line. */
82	static const char clib_check_lds(lua_State L, const char *buf)	×
83	{
84	char p, e;	×
85	if ((!strncmp(buf, "GROUP", 5) \|\| !strncmp(buf, "INPUT", 5)) &&	×
86	(p = strchr(buf, '('))) {	×
87	while (*++p == ' ') ;	×
88	for (e = p; e && e != ' ' && *e != ')'; e++) ;	×
89	return strdata(lj_str_new(L, p, e-p));	×
90	}
91	return NULL;
92	}
93
94	/* Quick and dirty solution to resolve shared library name from ld script. */
95	static const char clib_resolve_lds(lua_State L, const char *name)	×
96	{
97	FILE *fp = fopen(name, "r");	×
98	const char *p = NULL;	×
99	if (fp) {	×
100	char buf[256];	×
101	if (fgets(buf, sizeof(buf), fp)) {	×
102	if (!strncmp(buf, "/* GNU ld script", 16)) { /* ld script magic? */	×
103	while (fgets(buf, sizeof(buf), fp)) { /* Check all lines. */	×
104	p = clib_check_lds(L, buf);	×
105	if (p) break;	×
106	}
107	} else { /* Otherwise check only the first line. */
108	p = clib_check_lds(L, buf);	×
109	}
110	}
111	fclose(fp);	×
112	}
113	return p;	×
114	}
115
116	static void clib_loadlib(lua_State L, const char *name, int global)	11✔
117	{
118	void *h = dlopen(clib_extname(L, name),	22✔
119	RTLD_LAZY \| (global?RTLD_GLOBAL:RTLD_LOCAL));
120	if (!h) {	11✔
121	const char e, err = dlerror();	1✔
122	if (err && *err == '/' && (e = strchr(err, ':')) &&	1✔
123	(name = clib_resolve_lds(L, strdata(lj_str_new(L, err, e-err))))) {	×
124	h = dlopen(name, RTLD_LAZY \| (global?RTLD_GLOBAL:RTLD_LOCAL));	×
125	if (h) return h;	×
126	err = dlerror();	×
127	}
128	if (!err) err = "dlopen failed";	1✔
129	lj_err_callermsg(L, err);	1✔
130	}
131	return h;
132	}
133
134	static void clib_unloadlib(CLibrary *cl)	216✔
135	{
136	if (cl->handle && cl->handle != CLIB_DEFHANDLE)	216✔
137	dlclose(cl->handle);	8✔
138	}
139
140	static void clib_getsym(CLibrary cl, const char *name)	156✔
141	{
142	void *p = dlsym(cl->handle, name);	312✔
143	return p;	156✔
144	}
145
146	#elif LJ_TARGET_WINDOWS
147
148	#define WIN32_LEAN_AND_MEAN
149	#include <windows.h>
150
151	#ifndef GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
152	#define GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS 4
153	#define GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT 2
154	BOOL WINAPI GetModuleHandleExA(DWORD, LPCSTR, HMODULE*);
155	#endif
156
157	#define CLIB_DEFHANDLE ((void *)-1)
158
159	/* Default libraries. */
160	enum {
161	CLIB_HANDLE_EXE,
162	#if !LJ_TARGET_UWP
163	CLIB_HANDLE_DLL,
164	CLIB_HANDLE_CRT,
165	CLIB_HANDLE_KERNEL32,
166	CLIB_HANDLE_USER32,
167	CLIB_HANDLE_GDI32,
168	#endif
169	CLIB_HANDLE_MAX
170	};
171
172	static void *clib_def_handle[CLIB_HANDLE_MAX];
173
174	LJ_NORET LJ_NOINLINE static void clib_error(lua_State L, const char fmt,
175	const char *name)
176	{
177	DWORD err = GetLastError();
178	#if LJ_TARGET_XBOXONE
179	wchar_t wbuf[128];
180	char buf[128*2];
181	if (!FormatMessageW(FORMAT_MESSAGE_IGNORE_INSERTS\|FORMAT_MESSAGE_FROM_SYSTEM,
182	NULL, err, 0, wbuf, sizeof(wbuf)/sizeof(wchar_t), NULL) \|\|
183	!WideCharToMultiByte(CP_ACP, 0, wbuf, 128, buf, 128*2, NULL, NULL))
184	#else
185	char buf[128];
186	if (!FormatMessageA(FORMAT_MESSAGE_IGNORE_INSERTS\|FORMAT_MESSAGE_FROM_SYSTEM,
187	NULL, err, 0, buf, sizeof(buf), NULL))
188	#endif
189	buf[0] = '\0';
190	lj_err_callermsg(L, lj_strfmt_pushf(L, fmt, name, buf));
191	}
192
193	static int clib_needext(const char *s)
194	{
195	while (*s) {
196	if (s == '/' \|\| s == '\\' \|\| *s == '.') return 0;
197	s++;
198	}
199	return 1;
200	}
201
202	static const char clib_extname(lua_State L, const char *name)
203	{
204	if (clib_needext(name)) {
205	name = lj_strfmt_pushf(L, "%s.dll", name);
206	L->top--;
207	}
208	return name;
209	}
210
211	static void clib_loadlib(lua_State L, const char *name, int global)
212	{
213	DWORD oldwerr = GetLastError();
214	void *h = LJ_WIN_LOADLIBA(clib_extname(L, name));
215	if (!h) clib_error(L, "cannot load module " LUA_QS ": %s", name);
216	SetLastError(oldwerr);
217	UNUSED(global);
218	return h;
219	}
220
221	static void clib_unloadlib(CLibrary *cl)
222	{
223	if (cl->handle == CLIB_DEFHANDLE) {
224	#if !LJ_TARGET_UWP
225	MSize i;
226	for (i = CLIB_HANDLE_KERNEL32; i < CLIB_HANDLE_MAX; i++) {
227	void *h = clib_def_handle[i];
228	if (h) {
229	clib_def_handle[i] = NULL;
230	FreeLibrary((HINSTANCE)h);
231	}
232	}
233	#endif
234	} else if (cl->handle) {
235	FreeLibrary((HINSTANCE)cl->handle);
236	}
237	}
238
239	#if LJ_TARGET_UWP
240	EXTERN_C IMAGE_DOS_HEADER __ImageBase;
241	#endif
242
243	static void clib_getsym(CLibrary cl, const char *name)
244	{
245	void *p = NULL;
246	if (cl->handle == CLIB_DEFHANDLE) { /* Search default libraries. */
247	MSize i;
248	for (i = 0; i < CLIB_HANDLE_MAX; i++) {
249	HINSTANCE h = (HINSTANCE)clib_def_handle[i];
250	if (!(void )h) { / Resolve default library handles (once). */
251	#if LJ_TARGET_UWP
252	h = (HINSTANCE)&__ImageBase;
253	#else
254	switch (i) {
255	case CLIB_HANDLE_EXE: GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, NULL, &h); break;
256	case CLIB_HANDLE_DLL:
257	GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS\|GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
258	(const char *)clib_def_handle, &h);
259	break;
260	case CLIB_HANDLE_CRT:
261	GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS\|GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
262	(const char *)&_fmode, &h);
263	break;
264	case CLIB_HANDLE_KERNEL32: h = LJ_WIN_LOADLIBA("kernel32.dll"); break;
265	case CLIB_HANDLE_USER32: h = LJ_WIN_LOADLIBA("user32.dll"); break;
266	case CLIB_HANDLE_GDI32: h = LJ_WIN_LOADLIBA("gdi32.dll"); break;
267	}
268	if (!h) continue;
269	#endif
270	clib_def_handle[i] = (void *)h;
271	}
272	p = (void *)GetProcAddress(h, name);
273	if (p) break;
274	}
275	} else {
276	p = (void *)GetProcAddress((HINSTANCE)cl->handle, name);
277	}
278	return p;
279	}
280
281	#else
282
283	#define CLIB_DEFHANDLE NULL
284
285	LJ_NORET LJ_NOINLINE static void clib_error(lua_State L, const char fmt,
286	const char *name)
287	{
288	lj_err_callermsg(L, lj_strfmt_pushf(L, fmt, name, "no support for this OS"));
289	}
290
291	static void clib_loadlib(lua_State L, const char *name, int global)
292	{
293	lj_err_callermsg(L, "no support for loading dynamic libraries for this OS");
294	UNUSED(name); UNUSED(global);
295	return NULL;
296	}
297
298	static void clib_unloadlib(CLibrary *cl)
299	{
300	UNUSED(cl);
301	}
302
303	static void clib_getsym(CLibrary cl, const char *name)
304	{
305	UNUSED(cl); UNUSED(name);
306	return NULL;
307	}
308
309	#endif
310
311	/* -- C library indexing -------------------------------------------------- */
312
313	#if LJ_TARGET_X86 && LJ_ABI_WIN
314	/* Compute argument size for fastcall/stdcall functions. */
315	static CTSize clib_func_argsize(CTState cts, CType ct)
316	{
317	CTSize n = 0;
318	while (ct->sib) {
319	CType *d;
320	ct = ctype_get(cts, ct->sib);
321	if (ctype_isfield(ct->info)) {
322	d = ctype_rawchild(cts, ct);
323	n += ((d->size + 3) & ~3);
324	}
325	}
326	return n;
327	}
328	#endif
329
330	/* Get redirected or mangled external symbol. */
331	static const char clib_extsym(CTState cts, CType ct, GCstr name)	156✔
332	{
333	if (ct->sib) {	156✔
334	CType *ctf = ctype_get(cts, ct->sib);	135✔
335	if (ctype_isxattrib(ctf->info, CTA_REDIR))	135✔
336	return strdata(gco2str(gcref(ctf->name)));	19✔
337	}
338	return strdata(name);	137✔
339	}
340
341	/* Index a C library by name. */
342	TValue lj_clib_index(lua_State L, CLibrary cl, GCstr name)	66,504✔
343	{
344	TValue *tv = lj_tab_setstr(L, cl->cache, name);	66,504✔
345	if (LJ_UNLIKELY(tvisnil(tv))) {	66,504✔
346	CTState *cts = ctype_cts(L);	156✔
347	CType *ct;	156✔
348	CTypeID id = lj_ctype_getname(cts, &ct, name, CLNS_INDEX);	156✔
349	if (!id)	156✔
350	lj_err_callerv(L, LJ_ERR_FFI_NODECL, strdata(name));	×
351	if (ctype_isconstval(ct->info)) {	156✔
352	CType *ctt = ctype_child(cts, ct);	×
353	lj_assertCTS(ctype_isinteger(ctt->info) && ctt->size <= 4,	×
354	"only 32 bit const supported"); /* NYI */
355	if ((ctt->info & CTF_UNSIGNED) && (int32_t)ct->size < 0)	×
356	setnumV(tv, (lua_Number)(uint32_t)ct->size);	×
357	else
358	setintV(tv, (int32_t)ct->size);	×
359	} else {
360	const char *sym = clib_extsym(cts, ct, name);	156✔
361	#if LJ_TARGET_WINDOWS
362	DWORD oldwerr = GetLastError();
363	#endif
364	void *p = clib_getsym(cl, sym);	156✔
365	GCcdata *cd;	156✔
366	lj_assertCTS(ctype_isfunc(ct->info) \|\| ctype_isextern(ct->info),	156✔
367	"unexpected ctype %08x in clib", ct->info);
368	#if LJ_TARGET_X86 && LJ_ABI_WIN
369	/* Retry with decorated name for fastcall/stdcall functions. */
370	if (!p && ctype_isfunc(ct->info)) {
371	CTInfo cconv = ctype_cconv(ct->info);
372	if (cconv == CTCC_FASTCALL \|\| cconv == CTCC_STDCALL) {
373	CTSize sz = clib_func_argsize(cts, ct);
374	const char *symd = lj_strfmt_pushf(L,
375	cconv == CTCC_FASTCALL ? "@%s@%d" : "_%s@%d",
376	sym, sz);
377	L->top--;
378	p = clib_getsym(cl, symd);
379	}
380	}
381	#endif
382	if (!p)	156✔
383	clib_error(L, "cannot resolve symbol " LUA_QS ": %s", sym);	×
384	#if LJ_TARGET_WINDOWS
385	SetLastError(oldwerr);
386	#endif
387	cd = lj_cdata_new(cts, id, CTSIZE_PTR);	156✔
388	(void *)cdataptr(cd) = p;	156✔
389	setcdataV(L, tv, cd);	156✔
390	lj_gc_anybarriert(L, cl->cache);	156✔
391	}
392	}
393	return tv;	66,504✔
394	}
395
396	/* -- C library management ------------------------------------------------ */
397
398	/* Create a new CLibrary object and push it on the stack. */
399	static CLibrary clib_new(lua_State L, GCtab *mt)	222✔
400	{
401	GCtab *t = lj_tab_new(L, 0, 0);	222✔
402	GCudata *ud = lj_udata_new(L, sizeof(CLibrary), t);	222✔
403	CLibrary cl = (CLibrary )uddata(ud);	222✔
404	cl->cache = t;	222✔
405	ud->udtype = UDTYPE_FFI_CLIB;	222✔
406	/* NOBARRIER: The GCudata is new (marked white). */
407	setgcref(ud->metatable, obj2gco(mt));	222✔
408	setudataV(L, L->top++, ud);	222✔
409	return cl;	222✔
410	}
411
412	/* Load a C library. */
413	void lj_clib_load(lua_State L, GCtab mt, GCstr *name, int global)	11✔
414	{
415	void *handle = clib_loadlib(L, strdata(name), global);	11✔
416	CLibrary *cl = clib_new(L, mt);	10✔
417	cl->handle = handle;	10✔
418	}	10✔
419
420	/* Unload a C library. */
421	void lj_clib_unload(CLibrary *cl)	216✔
422	{
423	clib_unloadlib(cl);	216✔
424	cl->handle = NULL;	216✔
425	}	216✔
426
427	/* Create the default C library object. */
428	void lj_clib_default(lua_State L, GCtab mt)	212✔
429	{
430	CLibrary *cl = clib_new(L, mt);	212✔
431	cl->handle = CLIB_DEFHANDLE;	212✔
432	}	212✔
433
434	#endif

tarantool / luajit / 11774765987

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