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FFI: Improve conversion error messages.

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This commit is contained in:
Mike Pall 2011-02-19 12:56:12 +01:00
parent 3e2a7a2d7f
commit bd29d16141
4 changed files with 32 additions and 15 deletions
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11
src/lib_ffi.c
View File

@ -74,7 +74,7 @@ static void *ffi_checkptr(lua_State *L, int narg, CTypeID id)
void *p;
if (o >= L->top)
lj_err_arg(L, narg, LJ_ERR_NOVAL);
lj_cconv_ct_tv(cts, ctype_get(cts, id), (uint8_t *)&p, o, 0);
lj_cconv_ct_tv(cts, ctype_get(cts, id), (uint8_t *)&p, o, CCF_ARG(narg));
return p;
}
@ -86,7 +86,8 @@ static int32_t ffi_checkint(lua_State *L, int narg)
int32_t i;
if (o >= L->top)
lj_err_arg(L, narg, LJ_ERR_NOVAL);
lj_cconv_ct_tv(cts, ctype_get(cts, CTID_INT32), (uint8_t *)&i, o, 0);
lj_cconv_ct_tv(cts, ctype_get(cts, CTID_INT32), (uint8_t *)&i, o,
CCF_ARG(narg));
return i;
}
@ -444,9 +445,11 @@ LJLIB_CF(ffi_string) LJLIB_REC(.)
size_t len;
if (o+1 < L->top) {
len = (size_t)ffi_checkint(L, 2);
lj_cconv_ct_tv(cts, ctype_get(cts, CTID_P_CVOID), (uint8_t *)&p, o, 0);
lj_cconv_ct_tv(cts, ctype_get(cts, CTID_P_CVOID), (uint8_t *)&p, o,
CCF_ARG(1));
} else {
lj_cconv_ct_tv(cts, ctype_get(cts, CTID_P_CCHAR), (uint8_t *)&p, o, 0);
lj_cconv_ct_tv(cts, ctype_get(cts, CTID_P_CCHAR), (uint8_t *)&p, o,
CCF_ARG(1));
len = strlen(p);
}
L->top = o+1; /* Make sure this is the last item on the stack. */

13
src/lj_ccall.c
View File

@ -140,7 +140,7 @@
int rcl[2]; rcl[0] = rcl[1] = 0; \
if (!ccall_classify_struct(cts, d, rcl, 0)) { \
cc->nsp = nsp; cc->ngpr = ngpr; cc->nfpr = nfpr; \
if (ccall_struct_arg(cc, cts, d, rcl, o)) goto err_nyi; \
if (ccall_struct_arg(cc, cts, d, rcl, o, narg)) goto err_nyi; \
nsp = cc->nsp; ngpr = cc->ngpr; nfpr = cc->nfpr; \
continue; \
} /* Pass all other structs by value on stack. */
@ -278,11 +278,12 @@ static int ccall_struct_reg(CCallState *cc, GPRArg *dp, int *rcl)
/* Pass a small struct argument. */
static int ccall_struct_arg(CCallState *cc, CTState *cts, CType *d, int *rcl,
TValue *o)
TValue *o, int narg)
{
GPRArg dp[2];
dp[0] = dp[1] = 0;
lj_cconv_ct_tv(cts, d, (uint8_t *)dp, o, 0); /* Convert to temp. struct. */
/* Convert to temp. struct. */
lj_cconv_ct_tv(cts, d, (uint8_t *)dp, o, CCF_ARG(narg));
if (!ccall_struct_reg(cc, dp, rcl)) { /* Register overflow? Pass on stack. */
MSize nsp = cc->nsp, n = rcl[1] ? 2 : 1;
if (nsp + n > CCALL_MAXSTACK) return 1; /* Too many arguments. */
@ -347,7 +348,7 @@ static int ccall_set_args(lua_State *L, CTState *cts, CType *ct,
TValue *o, *top = L->top;
CTypeID fid;
CType *ctr;
MSize maxgpr, ngpr = 0, nsp = 0;
MSize maxgpr, ngpr = 0, nsp = 0, narg;
#if CCALL_NARG_FPR
MSize nfpr = 0;
#endif
@ -401,7 +402,7 @@ static int ccall_set_args(lua_State *L, CTState *cts, CType *ct,
}
/* Walk through all passed arguments. */
for (o = L->base+1; o < top; o++) {
for (o = L->base+1, narg = 1; o < top; o++, narg++) {
CTypeID did;
CType *d;
CTSize sz;
@ -466,7 +467,7 @@ static int ccall_set_args(lua_State *L, CTState *cts, CType *ct,
*(void **)dp = rp;
dp = rp;
}
lj_cconv_ct_tv(cts, d, (uint8_t *)dp, o, 0);
lj_cconv_ct_tv(cts, d, (uint8_t *)dp, o, CCF_ARG(narg));
#if LJ_TARGET_X64 && LJ_ABI_WIN
if (isva) { /* Windows/x64 mirrors varargs in both register sets. */
if (nfpr == ngpr)

18
src/lj_cconv.c
View File

@ -22,17 +22,26 @@ LJ_NORET static void cconv_err_conv(CTState *cts, CType *d, CType *s,
const char *dst = strdata(lj_ctype_repr(cts->L, ctype_typeid(cts, d), NULL));
const char *src;
if ((flags & CCF_FROMTV))
src = lj_obj_typename[1+(ctype_isnum(s->info) ? LUA_TNUMBER : LUA_TSTRING)];
src = lj_obj_typename[1+(ctype_isnum(s->info) ? LUA_TNUMBER :
ctype_isarray(s->info) ? LUA_TSTRING : LUA_TNIL)];
else
src = strdata(lj_ctype_repr(cts->L, ctype_typeid(cts, s), NULL));
if (CCF_GETARG(flags))
lj_err_argv(cts->L, CCF_GETARG(flags), LJ_ERR_FFI_BADCONV, src, dst);
else
lj_err_callerv(cts->L, LJ_ERR_FFI_BADCONV, src, dst);
}
/* Bad conversion from TValue. */
LJ_NORET static void cconv_err_convtv(CTState *cts, CType *d, TValue *o)
LJ_NORET static void cconv_err_convtv(CTState *cts, CType *d, TValue *o,
CTInfo flags)
{
const char *dst = strdata(lj_ctype_repr(cts->L, ctype_typeid(cts, d), NULL));
lj_err_callerv(cts->L, LJ_ERR_FFI_BADCONV, typename(o), dst);
const char *src = typename(o);
if (CCF_GETARG(flags))
lj_err_argv(cts->L, CCF_GETARG(flags), LJ_ERR_FFI_BADCONV, src, dst);
else
lj_err_callerv(cts->L, LJ_ERR_FFI_BADCONV, src, dst);
}
/* Initializer overflow. */
@ -570,13 +579,14 @@ void lj_cconv_ct_tv(CTState *cts, CType *d,
sid = CTID_BOOL;
} else if (tvisnil(o)) {
tmpptr = (void *)0;
flags |= CCF_FROMTV;
} else if (tvisudata(o)) {
tmpptr = uddata(udataV(o));
} else if (tvislightud(o)) {
tmpptr = lightudV(o);
} else {
err_conv:
cconv_err_convtv(cts, d, o);
cconv_err_convtv(cts, d, o, flags);
}
s = ctype_get(cts, sid);
doconv:

3
src/lj_cconv.h
View File

@ -48,6 +48,9 @@ static LJ_AINLINE uint32_t cconv_idx(CTInfo info)
#define CCF_SAME 0x00000004u
#define CCF_IGNQUAL 0x00000008u
#define CCF_ARG_SHIFT 8
#define CCF_ARG(n) ((n) << CCF_ARG_SHIFT)
#define CCF_GETARG(f) ((f) >> CCF_ARG_SHIFT)
LJ_FUNC int lj_cconv_compatptr(CTState *cts, CType *d, CType *s, CTInfo flags);
LJ_FUNC void lj_cconv_ct_ct(CTState *cts, CType *d, CType *s,