diff options
| -rw-r--r-- | gdb/ChangeLog | 8 | ||||
| -rw-r--r-- | gdb/c-exp.y | 70 | ||||
| -rw-r--r-- | gdb/valops.c | 78 |
3 files changed, 92 insertions, 64 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index bd0852a..09d9c9a 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,13 @@ Mon Nov 23 11:14:15 1992 Fred Fish (fnf@cygnus.com) + * c-exp.y (yylex): Add tempbuf, tempbufindex, and tempbufsize, + which together maintain a dynamically expandable static buffer + for the lexer to use when translating C strings to their internal + form (other future uses possible). Fix parsing of C style strings + to do the normal C style input conversions of escaped character + sequences. + * valops.c (value_string): Remove translation of escaped + character sequences, now done in C expression parser. * language.h (PRINT_LITERAL_FORM): New macro that takes character and decides if it should be printed in literal form or some other form, based on it's ASCII value and setting of sevenbit_strings. diff --git a/gdb/c-exp.y b/gdb/c-exp.y index 397931e..c368aa9 100644 --- a/gdb/c-exp.y +++ b/gdb/c-exp.y @@ -1079,11 +1079,15 @@ const static struct token tokentab2[] = int yylex () { - register int c; - register int namelen; - register unsigned i; - register char *tokstart; - + int c; + int namelen; + unsigned int i; + char *tokstart; + char *tokptr; + int tempbufindex; + static char *tempbuf; + static int tempbufsize; + retry: tokstart = lexptr; @@ -1250,21 +1254,55 @@ yylex () return c; case '"': - for (namelen = 1; (c = tokstart[namelen]) != '"'; namelen++) - if (c == '\\') + + /* Build the gdb internal form of the input string in tempbuf, + translating any standard C escape forms seen. Note that the + buffer is null byte terminated *only* for the convenience of + debugging gdb itself and printing the buffer contents when + the buffer contains no embedded nulls. Gdb does not depend + upon the buffer being null byte terminated, it uses the length + string instead. This allows gdb to handle C strings (as well + as strings in other languages) with embedded null bytes */ + + tokptr = ++tokstart; + tempbufindex = 0; + + do { + /* Grow the static temp buffer if necessary, including allocating + the first one on demand. */ + if (tempbufindex + 1 >= tempbufsize) { - c = tokstart[++namelen]; - if (c >= '0' && c <= '9') + tempbuf = (char *) realloc (tempbuf, tempbufsize += 64); + } + switch (*tokptr) + { + case '\0': + case '"': + /* Do nothing, loop will terminate. */ + break; + case '\\': + tokptr++; + c = parse_escape (&tokptr); + if (c == -1) { - c = tokstart[++namelen]; - if (c >= '0' && c <= '9') - c = tokstart[++namelen]; + continue; } + tempbuf[tempbufindex++] = c; + break; + default: + tempbuf[tempbufindex++] = *tokptr++; + break; } - yylval.sval.ptr = tokstart + 1; - yylval.sval.length = namelen - 1; - lexptr += namelen + 1; - return STRING; + } while ((*tokptr != '"') && (*tokptr != '\0')); + if (*tokptr++ != '"') + { + error ("Unterminated string in expression."); + } + tempbuf[tempbufindex] = '\0'; /* See note above */ + yylval.sval.ptr = tempbuf; + yylval.sval.length = tempbufindex; + lexptr = tokptr; + return (STRING); } if (!(c == '_' || c == '$' diff --git a/gdb/valops.c b/gdb/valops.c index a1ba919..d29b1d8 100644 --- a/gdb/valops.c +++ b/gdb/valops.c @@ -43,7 +43,7 @@ static value search_struct_field PARAMS ((char *, value, int, struct type *, int)); static value -search_struct_method PARAMS ((char *, value, value *, int, int *, +search_struct_method PARAMS ((char *, value *, value *, int, int *, struct type *)); static int @@ -234,7 +234,7 @@ value_assign (toval, fromval) fromval = value_cast (REGISTER_VIRTUAL_TYPE (regno), fromval); memcpy (virtual_buffer, VALUE_CONTENTS (fromval), REGISTER_VIRTUAL_SIZE (regno)); - target_convert_from_virtual (regno, virtual_buffer, raw_buffer); + REGISTER_CONVERT_TO_RAW (regno, virtual_buffer, raw_buffer); use_buffer = REGISTER_RAW_SIZE (regno); } @@ -913,7 +913,8 @@ call_function_by_hand (function, nargs, args) Call the function malloc in the inferior to get space for it, then copy the data into that space and then return the address with type char *. - PTR points to the string constant data; LEN is number of characters. */ + PTR points to the string constant data; LEN is number of characters. + Note that the string may contain embedded null bytes. */ value value_string (ptr, len) @@ -923,36 +924,11 @@ value_string (ptr, len) register value val; register struct symbol *sym; value blocklen; - register char *copy = (char *) alloca (len + 1); - char *i = ptr; - register char *o = copy, *ibeg = ptr; - register int c; - - /* Copy the string into COPY, processing escapes. - We could not conveniently process them in the parser - because the string there wants to be a substring of the input. */ - - while (i - ibeg < len) - { - c = *i++; - if (c == '\\') - { - c = parse_escape (&i); - if (c == -1) - continue; - } - *o++ = c; - } - *o = 0; - - /* Get the length of the string after escapes are processed. */ - - len = o - copy; /* Find the address of malloc in the inferior. */ sym = lookup_symbol ("malloc", 0, VAR_NAMESPACE, 0, NULL); - if (sym != 0) + if (sym != NULL) { if (SYMBOL_CLASS (sym) != LOC_BLOCK) error ("\"malloc\" exists in this program but is not a function."); @@ -973,9 +949,9 @@ value_string (ptr, len) blocklen = value_from_longest (builtin_type_int, (LONGEST) (len + 1)); val = call_function_by_hand (val, 1, &blocklen); - if (value_zerop (val)) + if (value_logical_not (val)) error ("No memory available for string constant."); - write_memory (value_as_pointer (val), copy, len + 1); + write_memory (value_as_pointer (val), ptr, len + 1); VALUE_TYPE (val) = lookup_pointer_type (builtin_type_char); return val; } @@ -1038,6 +1014,7 @@ search_struct_field (name, arg1, offset, type, looking_for_baseclass) if (BASETYPE_VIA_VIRTUAL (type, i)) { value v2; + /* Fix to use baseclass_offset instead. FIXME */ baseclass_addr (type, i, VALUE_CONTENTS (arg1) + offset, &v2, (int *)NULL); if (v2 == 0) @@ -1065,9 +1042,9 @@ search_struct_field (name, arg1, offset, type, looking_for_baseclass) If found, return value, else return NULL. */ static value -search_struct_method (name, arg1, args, offset, static_memfuncp, type) +search_struct_method (name, arg1p, args, offset, static_memfuncp, type) char *name; - register value arg1, *args; + register value *arg1p, *args; int offset, *static_memfuncp; register struct type *type; { @@ -1092,10 +1069,10 @@ search_struct_method (name, arg1, args, offset, static_memfuncp, type) TYPE_FN_FIELD_ARGS (f, j), args)) { if (TYPE_FN_FIELD_VIRTUAL_P (f, j)) - return (value)value_virtual_fn_field (arg1, f, j, type); + return (value)value_virtual_fn_field (arg1p, f, j, type, offset); if (TYPE_FN_FIELD_STATIC_P (f, j) && static_memfuncp) *static_memfuncp = 1; - return (value)value_fn_field (f, j); + return (value)value_fn_field (arg1p, f, j, type, offset); } j--; } @@ -1104,25 +1081,28 @@ search_struct_method (name, arg1, args, offset, static_memfuncp, type) for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) { - value v, v2; + value v; int base_offset; if (BASETYPE_VIA_VIRTUAL (type, i)) { - baseclass_addr (type, i, VALUE_CONTENTS (arg1) + offset, - &v2, (int *)NULL); - if (v2 == 0) + base_offset = + baseclass_offset (type, i, *arg1p, offset); + if (base_offset == -1) error ("virtual baseclass botch"); - base_offset = 0; } else { - v2 = arg1; base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8; } - v = search_struct_method (name, v2, args, base_offset, + v = search_struct_method (name, arg1p, args, base_offset + offset, static_memfuncp, TYPE_BASECLASS (type, i)); - if (v) return v; + if (v) + { +/* FIXME-bothner: Why is this commented out? Why is it here? */ +/* *arg1p = arg1_tmp;*/ + return v; + } } return NULL; } @@ -1193,7 +1173,7 @@ value_struct_elt (argp, args, name, static_memfuncp, err) if (destructor_name_p (name, t)) error ("Cannot get value of destructor"); - v = search_struct_method (name, *argp, args, 0, static_memfuncp, t); + v = search_struct_method (name, argp, args, 0, static_memfuncp, t); if (v == 0) { @@ -1210,8 +1190,9 @@ value_struct_elt (argp, args, name, static_memfuncp, err) if (!args[1]) { /* destructors are a special case. */ - return (value)value_fn_field (TYPE_FN_FIELDLIST1 (t, 0), - TYPE_FN_FIELDLIST_LENGTH (t, 0)); + return (value)value_fn_field (NULL, TYPE_FN_FIELDLIST1 (t, 0), + TYPE_FN_FIELDLIST_LENGTH (t, 0), + 0, 0); } else { @@ -1219,7 +1200,7 @@ value_struct_elt (argp, args, name, static_memfuncp, err) } } else - v = search_struct_method (name, *argp, args, 0, static_memfuncp, t); + v = search_struct_method (name, argp, args, 0, static_memfuncp, t); if (v == 0) { @@ -1414,7 +1395,8 @@ value_struct_elt_for_reference (domain, offset, curtype, name, intype) (lookup_reference_type (lookup_member_type (TYPE_FN_FIELD_TYPE (f, j), domain)), - (LONGEST) TYPE_FN_FIELD_VOFFSET (f, j)); + (LONGEST) METHOD_PTR_FROM_VOFFSET + (TYPE_FN_FIELD_VOFFSET (f, j))); } else { |