diff options
Diffstat (limited to 'rtemstoolkit/libiberty/d-demangle.c')
| -rw-r--r-- | rtemstoolkit/libiberty/d-demangle.c | 954 |
1 files changed, 645 insertions, 309 deletions
diff --git a/rtemstoolkit/libiberty/d-demangle.c b/rtemstoolkit/libiberty/d-demangle.c index 08690de..c41ad02 100644 --- a/rtemstoolkit/libiberty/d-demangle.c +++ b/rtemstoolkit/libiberty/d-demangle.c @@ -1,5 +1,5 @@ /* Demangler for the D programming language - Copyright (C) 2014-2017 Free Software Foundation, Inc. + Copyright (C) 2014-2023 Free Software Foundation, Inc. Written by Iain Buclaw (ibuclaw@gdcproject.org) This file is part of the libiberty library. @@ -31,6 +31,9 @@ If not, see <http://www.gnu.org/licenses/>. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif +#ifdef HAVE_LIMITS_H +#include <limits.h> +#endif #include "safe-ctype.h" @@ -45,6 +48,13 @@ If not, see <http://www.gnu.org/licenses/>. */ #include <demangle.h> #include "libiberty.h" +#ifndef ULONG_MAX +#define ULONG_MAX (~0UL) +#endif +#ifndef UINT_MAX +#define UINT_MAX (~0U) +#endif + /* A mini string-handling package */ typedef struct string /* Beware: these aren't required to be */ @@ -55,9 +65,9 @@ typedef struct string /* Beware: these aren't required to be */ } string; static void -string_need (string *s, int n) +string_need (string *s, size_t n) { - int tem; + size_t tem; if (s->b == NULL) { @@ -68,7 +78,7 @@ string_need (string *s, int n) s->p = s->b = XNEWVEC (char, n); s->e = s->b + n; } - else if (s->e - s->p < n) + else if ((size_t) (s->e - s->p) < n) { tem = s->p - s->b; n += tem; @@ -117,14 +127,14 @@ string_setlength (string *s, int n) static void string_append (string *p, const char *s) { - int n = strlen (s); + size_t n = strlen (s); string_need (p, n); memcpy (p->p, s, n); p->p += n; } static void -string_appendn (string *p, const char *s, int n) +string_appendn (string *p, const char *s, size_t n) { if (n != 0) { @@ -135,7 +145,7 @@ string_appendn (string *p, const char *s, int n) } static void -string_prependn (string *p, const char *s, int n) +string_prependn (string *p, const char *s, size_t n) { char *q; @@ -160,66 +170,73 @@ string_prepend (string *p, const char *s) } } -/* What kinds of symbol we could be parsing. */ -enum dlang_symbol_kinds +/* Demangle information structure we pass around. */ +struct dlang_info { - /* Top-level symbol, needs it's type checked. */ - dlang_top_level, - /* Function symbol, needs it's type checked. */ - dlang_function, - /* Strongly typed name, such as for classes, structs and enums. */ - dlang_type_name, - /* Template identifier. */ - dlang_template_ident, - /* Template symbol parameter. */ - dlang_template_param + /* The string we are demangling. */ + const char *s; + /* The index of the last back reference. */ + int last_backref; }; +/* Pass as the LEN to dlang_parse_template if symbol length is not known. */ +#define TEMPLATE_LENGTH_UNKNOWN (-1UL) + /* Prototypes for forward referenced functions */ -static const char *dlang_function_args (string *, const char *); +static const char *dlang_function_type (string *, const char *, + struct dlang_info *); + +static const char *dlang_function_args (string *, const char *, + struct dlang_info *); -static const char *dlang_type (string *, const char *); +static const char *dlang_type (string *, const char *, struct dlang_info *); -static const char *dlang_value (string *, const char *, const char *, char); +static const char *dlang_value (string *, const char *, const char *, char, + struct dlang_info *); static const char *dlang_parse_qualified (string *, const char *, - enum dlang_symbol_kinds); + struct dlang_info *, int); static const char *dlang_parse_mangle (string *, const char *, - enum dlang_symbol_kinds); + struct dlang_info *); + +static const char *dlang_parse_tuple (string *, const char *, + struct dlang_info *); -static const char *dlang_parse_tuple (string *, const char *); +static const char *dlang_parse_template (string *, const char *, + struct dlang_info *, unsigned long); -static const char *dlang_parse_template (string *, const char *, long); +static const char *dlang_lname (string *, const char *, unsigned long); /* Extract the number from MANGLED, and assign the result to RET. - Return the remaining string on success or NULL on failure. */ + Return the remaining string on success or NULL on failure. + A result larger than UINT_MAX is considered a failure. */ static const char * -dlang_number (const char *mangled, long *ret) +dlang_number (const char *mangled, unsigned long *ret) { /* Return NULL if trying to extract something that isn't a digit. */ if (mangled == NULL || !ISDIGIT (*mangled)) return NULL; - (*ret) = 0; + unsigned long val = 0; while (ISDIGIT (*mangled)) { - (*ret) *= 10; + unsigned long digit = mangled[0] - '0'; - /* If an overflow occured when multiplying by ten, the result - will not be a multiple of ten. */ - if ((*ret % 10) != 0) + /* Check for overflow. */ + if (val > (UINT_MAX - digit) / 10) return NULL; - (*ret) += mangled[0] - '0'; + val = val * 10 + digit; mangled++; } - if (*mangled == '\0' || *ret < 0) + if (*mangled == '\0') return NULL; + *ret = val; return mangled; } @@ -236,15 +253,15 @@ dlang_hexdigit (const char *mangled, char *ret) c = mangled[0]; if (!ISDIGIT (c)) - (*ret) = (c - (ISUPPER (c) ? 'A' : 'a') + 10); + *ret = c - (ISUPPER (c) ? 'A' : 'a') + 10; else - (*ret) = (c - '0'); + *ret = c - '0'; c = mangled[1]; if (!ISDIGIT (c)) - (*ret) = (*ret << 4) | (c - (ISUPPER (c) ? 'A' : 'a') + 10); + *ret = (*ret << 4) | (c - (ISUPPER (c) ? 'A' : 'a') + 10); else - (*ret) = (*ret << 4) | (c - '0'); + *ret = (*ret << 4) | (c - '0'); mangled += 2; @@ -267,6 +284,178 @@ dlang_call_convention_p (const char *mangled) } } +/* Extract the back reference position from MANGLED, and assign the result + to RET. Return the remaining string on success or NULL on failure. + A result <= 0 is a failure. */ +static const char * +dlang_decode_backref (const char *mangled, long *ret) +{ + /* Return NULL if trying to extract something that isn't a digit. */ + if (mangled == NULL || !ISALPHA (*mangled)) + return NULL; + + /* Any identifier or non-basic type that has been emitted to the mangled + symbol before will not be emitted again, but is referenced by a special + sequence encoding the relative position of the original occurrence in the + mangled symbol name. + + Numbers in back references are encoded with base 26 by upper case letters + A-Z for higher digits but lower case letters a-z for the last digit. + + NumberBackRef: + [a-z] + [A-Z] NumberBackRef + ^ + */ + unsigned long val = 0; + + while (ISALPHA (*mangled)) + { + /* Check for overflow. */ + if (val > (ULONG_MAX - 25) / 26) + break; + + val *= 26; + + if (mangled[0] >= 'a' && mangled[0] <= 'z') + { + val += mangled[0] - 'a'; + if ((long) val <= 0) + break; + *ret = val; + return mangled + 1; + } + + val += mangled[0] - 'A'; + mangled++; + } + + return NULL; +} + +/* Extract the symbol pointed at by the back reference and assign the result + to RET. Return the remaining string on success or NULL on failure. */ +static const char * +dlang_backref (const char *mangled, const char **ret, struct dlang_info *info) +{ + *ret = NULL; + + if (mangled == NULL || *mangled != 'Q') + return NULL; + + /* Position of 'Q'. */ + const char *qpos = mangled; + long refpos; + mangled++; + + mangled = dlang_decode_backref (mangled, &refpos); + if (mangled == NULL) + return NULL; + + if (refpos > qpos - info->s) + return NULL; + + /* Set the position of the back reference. */ + *ret = qpos - refpos; + + return mangled; +} + +/* Demangle a back referenced symbol from MANGLED and append it to DECL. + Return the remaining string on success or NULL on failure. */ +static const char * +dlang_symbol_backref (string *decl, const char *mangled, + struct dlang_info *info) +{ + /* An identifier back reference always points to a digit 0 to 9. + + IdentifierBackRef: + Q NumberBackRef + ^ + */ + const char *backref; + unsigned long len; + + /* Get position of the back reference. */ + mangled = dlang_backref (mangled, &backref, info); + + /* Must point to a simple identifier. */ + backref = dlang_number (backref, &len); + if (backref == NULL || strlen(backref) < len) + return NULL; + + backref = dlang_lname (decl, backref, len); + if (backref == NULL) + return NULL; + + return mangled; +} + +/* Demangle a back referenced type from MANGLED and append it to DECL. + IS_FUNCTION is 1 if the back referenced type is expected to be a function. + Return the remaining string on success or NULL on failure. */ +static const char * +dlang_type_backref (string *decl, const char *mangled, struct dlang_info *info, + int is_function) +{ + /* A type back reference always points to a letter. + + TypeBackRef: + Q NumberBackRef + ^ + */ + const char *backref; + + /* If we appear to be moving backwards through the mangle string, then + bail as this may be a recursive back reference. */ + if (mangled - info->s >= info->last_backref) + return NULL; + + int save_refpos = info->last_backref; + info->last_backref = mangled - info->s; + + /* Get position of the back reference. */ + mangled = dlang_backref (mangled, &backref, info); + + /* Must point to a type. */ + if (is_function) + backref = dlang_function_type (decl, backref, info); + else + backref = dlang_type (decl, backref, info); + + info->last_backref = save_refpos; + + if (backref == NULL) + return NULL; + + return mangled; +} + +/* Extract the beginning of a symbol name from MANGLED and + return 1 on success or 0 on failure. */ +static int +dlang_symbol_name_p (const char *mangled, struct dlang_info *info) +{ + long ret; + const char *qref = mangled; + + if (ISDIGIT (*mangled)) + return 1; + + if (mangled[0] == '_' && mangled[1] == '_' + && (mangled[2] == 'T' || mangled[2] == 'U')) + return 1; + + if (*mangled != 'Q') + return 0; + + mangled = dlang_decode_backref (mangled + 1, &ret); + if (mangled == NULL || ret > qref - info->s) + return 0; + + return ISDIGIT (qref[-ret]); +} + /* Demangle the calling convention from MANGLED and append it to DECL. Return the remaining string on success or NULL on failure. */ static const char * @@ -385,9 +574,11 @@ dlang_attributes (string *decl, const char *mangled) case 'g': case 'h': case 'k': + case 'n': /* inout parameter is represented as 'Ng'. vector parameter is represented as 'Nh'. - return paramenter is represented as 'Nk'. + return parameter is represented as 'Nk'. + typeof(*null) parameter is represented as 'Nn'. If we see this, then we know we're really in the parameter list. Rewind and break. */ mangled--; @@ -404,6 +595,10 @@ dlang_attributes (string *decl, const char *mangled) mangled++; string_append (decl, "scope "); continue; + case 'm': /* @live */ + mangled++; + string_append (decl, "@live "); + continue; default: /* unknown attribute */ return NULL; @@ -414,13 +609,39 @@ dlang_attributes (string *decl, const char *mangled) return mangled; } +/* Demangle the function type from MANGLED without the return type. + The arguments are appended to ARGS, the calling convention is appended + to CALL and attributes are appended to ATTR. Any of these can be NULL + to throw the information away. Return the remaining string on success + or NULL on failure. */ +static const char * +dlang_function_type_noreturn (string *args, string *call, string *attr, + const char *mangled, struct dlang_info *info) +{ + string dump; + string_init (&dump); + + /* Skip over calling convention and attributes. */ + mangled = dlang_call_convention (call ? call : &dump, mangled); + mangled = dlang_attributes (attr ? attr : &dump, mangled); + + if (args) + string_append (args, "("); + + mangled = dlang_function_args (args ? args : &dump, mangled, info); + if (args) + string_append (args, ")"); + + string_delete (&dump); + return mangled; +} + /* Demangle the function type from MANGLED and append it to DECL. Return the remaining string on success or NULL on failure. */ static const char * -dlang_function_type (string *decl, const char *mangled) +dlang_function_type (string *decl, const char *mangled, struct dlang_info *info) { string attr, args, type; - size_t szattr, szargs, sztype; if (mangled == NULL || *mangled == '\0') return NULL; @@ -435,27 +656,16 @@ dlang_function_type (string *decl, const char *mangled) string_init (&args); string_init (&type); - /* Function call convention. */ - mangled = dlang_call_convention (decl, mangled); - - /* Function attributes. */ - mangled = dlang_attributes (&attr, mangled); - szattr = string_length (&attr); - - /* Function arguments. */ - mangled = dlang_function_args (&args, mangled); - szargs = string_length (&args); + mangled = dlang_function_type_noreturn (&args, decl, &attr, mangled, info); /* Function return type. */ - mangled = dlang_type (&type, mangled); - sztype = string_length (&type); + mangled = dlang_type (&type, mangled, info); /* Append to decl in order. */ - string_appendn (decl, type.b, sztype); - string_append (decl, "("); - string_appendn (decl, args.b, szargs); - string_append (decl, ") "); - string_appendn (decl, attr.b, szattr); + string_appendn (decl, type.b, string_length (&type)); + string_appendn (decl, args.b, string_length (&args)); + string_append (decl, " "); + string_appendn (decl, attr.b, string_length (&attr)); string_delete (&attr); string_delete (&args); @@ -466,7 +676,7 @@ dlang_function_type (string *decl, const char *mangled) /* Demangle the argument list from MANGLED and append it to DECL. Return the remaining string on success or NULL on failure. */ static const char * -dlang_function_args (string *decl, const char *mangled) +dlang_function_args (string *decl, const char *mangled, struct dlang_info *info) { size_t n = 0; @@ -506,6 +716,15 @@ dlang_function_args (string *decl, const char *mangled) switch (*mangled) { + case 'I': /* in(T) */ + mangled++; + string_append (decl, "in "); + if (*mangled == 'K') /* in ref(T) */ + { + mangled++; + string_append (decl, "ref "); + } + break; case 'J': /* out(T) */ mangled++; string_append (decl, "out "); @@ -519,7 +738,7 @@ dlang_function_args (string *decl, const char *mangled) string_append (decl, "lazy "); break; } - mangled = dlang_type (decl, mangled); + mangled = dlang_type (decl, mangled, info); } return mangled; @@ -528,7 +747,7 @@ dlang_function_args (string *decl, const char *mangled) /* Demangle the type from MANGLED and append it to DECL. Return the remaining string on success or NULL on failure. */ static const char * -dlang_type (string *decl, const char *mangled) +dlang_type (string *decl, const char *mangled, struct dlang_info *info) { if (mangled == NULL || *mangled == '\0') return NULL; @@ -538,19 +757,19 @@ dlang_type (string *decl, const char *mangled) case 'O': /* shared(T) */ mangled++; string_append (decl, "shared("); - mangled = dlang_type (decl, mangled); + mangled = dlang_type (decl, mangled, info); string_append (decl, ")"); return mangled; case 'x': /* const(T) */ mangled++; string_append (decl, "const("); - mangled = dlang_type (decl, mangled); + mangled = dlang_type (decl, mangled, info); string_append (decl, ")"); return mangled; case 'y': /* immutable(T) */ mangled++; string_append (decl, "immutable("); - mangled = dlang_type (decl, mangled); + mangled = dlang_type (decl, mangled, info); string_append (decl, ")"); return mangled; case 'N': @@ -559,7 +778,7 @@ dlang_type (string *decl, const char *mangled) { mangled++; string_append (decl, "inout("); - mangled = dlang_type (decl, mangled); + mangled = dlang_type (decl, mangled, info); string_append (decl, ")"); return mangled; } @@ -567,15 +786,21 @@ dlang_type (string *decl, const char *mangled) { mangled++; string_append (decl, "__vector("); - mangled = dlang_type (decl, mangled); + mangled = dlang_type (decl, mangled, info); string_append (decl, ")"); return mangled; } + else if (*mangled == 'n') /* typeof(*null) */ + { + mangled++; + string_append (decl, "typeof(*null)"); + return mangled; + } else return NULL; case 'A': /* dynamic array (T[]) */ mangled++; - mangled = dlang_type (decl, mangled); + mangled = dlang_type (decl, mangled, info); string_append (decl, "[]"); return mangled; case 'G': /* static array (T[N]) */ @@ -590,7 +815,7 @@ dlang_type (string *decl, const char *mangled) num++; mangled++; } - mangled = dlang_type (decl, mangled); + mangled = dlang_type (decl, mangled, info); string_append (decl, "["); string_appendn (decl, numptr, num); string_append (decl, "]"); @@ -603,10 +828,10 @@ dlang_type (string *decl, const char *mangled) mangled++; string_init (&type); - mangled = dlang_type (&type, mangled); + mangled = dlang_type (&type, mangled, info); sztype = string_length (&type); - mangled = dlang_type (decl, mangled); + mangled = dlang_type (decl, mangled, info); string_append (decl, "["); string_appendn (decl, type.b, sztype); string_append (decl, "]"); @@ -618,7 +843,7 @@ dlang_type (string *decl, const char *mangled) mangled++; if (!dlang_call_convention_p (mangled)) { - mangled = dlang_type (decl, mangled); + mangled = dlang_type (decl, mangled, info); string_append (decl, "*"); return mangled; } @@ -630,16 +855,15 @@ dlang_type (string *decl, const char *mangled) case 'R': /* function T (C++) */ case 'Y': /* function T (Objective-C) */ /* Function pointer types don't include the trailing asterisk. */ - mangled = dlang_function_type (decl, mangled); + mangled = dlang_function_type (decl, mangled, info); string_append (decl, "function"); return mangled; - case 'I': /* ident T */ case 'C': /* class T */ case 'S': /* struct T */ case 'E': /* enum T */ case 'T': /* typedef T */ mangled++; - return dlang_parse_qualified (decl, mangled, dlang_type_name); + return dlang_parse_qualified (decl, mangled, info, 0); case 'D': /* delegate T */ { string mods; @@ -650,7 +874,12 @@ dlang_type (string *decl, const char *mangled) mangled = dlang_type_modifiers (&mods, mangled); szmods = string_length (&mods); - mangled = dlang_function_type (decl, mangled); + /* Back referenced function type. */ + if (mangled && *mangled == 'Q') + mangled = dlang_type_backref (decl, mangled, info, 1); + else + mangled = dlang_function_type (decl, mangled, info); + string_append (decl, "delegate"); string_appendn (decl, mods.b, szmods); @@ -659,12 +888,12 @@ dlang_type (string *decl, const char *mangled) } case 'B': /* tuple T */ mangled++; - return dlang_parse_tuple (decl, mangled); + return dlang_parse_tuple (decl, mangled, info); /* Basic types */ case 'n': mangled++; - string_append (decl, "none"); + string_append (decl, "typeof(null)"); return mangled; case 'v': mangled++; @@ -773,6 +1002,10 @@ dlang_type (string *decl, const char *mangled) } return NULL; + /* Back referenced type. */ + case 'Q': + return dlang_type_backref (decl, mangled, info, 0); + default: /* unhandled */ return NULL; } @@ -781,152 +1014,146 @@ dlang_type (string *decl, const char *mangled) /* Extract the identifier from MANGLED and append it to DECL. Return the remaining string on success or NULL on failure. */ static const char * -dlang_identifier (string *decl, const char *mangled, - enum dlang_symbol_kinds kind) +dlang_identifier (string *decl, const char *mangled, struct dlang_info *info) { - long len; + unsigned long len; + + if (mangled == NULL || *mangled == '\0') + return NULL; + + if (*mangled == 'Q') + return dlang_symbol_backref (decl, mangled, info); + + /* May be a template instance without a length prefix. */ + if (mangled[0] == '_' && mangled[1] == '_' + && (mangled[2] == 'T' || mangled[2] == 'U')) + return dlang_parse_template (decl, mangled, info, TEMPLATE_LENGTH_UNKNOWN); + const char *endptr = dlang_number (mangled, &len); if (endptr == NULL || len == 0) return NULL; - /* In template parameter symbols, the first character of the mangled - name can be a digit. This causes ambiguity issues because the - digits of the two numbers are adjacent. */ - if (kind == dlang_template_param) - { - long psize = len; - const char *pend; - int saved = string_length (decl); - - /* Work backwards until a match is found. */ - for (pend = endptr; endptr != NULL; pend--) - { - mangled = pend; + if (strlen (endptr) < len) + return NULL; - /* Reached the beginning of the pointer to the name length, - try parsing the entire symbol. */ - if (psize == 0) - { - psize = len; - pend = endptr; - endptr = NULL; - } + mangled = endptr; - /* Check whether template parameter is a function with a valid - return type or an untyped identifier. */ - if (ISDIGIT (*mangled)) - mangled = dlang_parse_qualified (decl, mangled, - dlang_template_ident); - else if (strncmp (mangled, "_D", 2) == 0) - mangled = dlang_parse_mangle (decl, mangled, dlang_function); + /* May be a template instance with a length prefix. */ + if (len >= 5 && mangled[0] == '_' && mangled[1] == '_' + && (mangled[2] == 'T' || mangled[2] == 'U')) + return dlang_parse_template (decl, mangled, info, len); - /* Check for name length mismatch. */ - if (mangled && (mangled - pend) == psize) - return mangled; + /* There can be multiple different declarations in the same function that have + the same mangled name. To make the mangled names unique, a fake parent in + the form `__Sddd' is added to the symbol. */ + if (len >= 4 && mangled[0] == '_' && mangled[1] == '_' && mangled[2] == 'S') + { + const char *numptr = mangled + 3; + while (numptr < (mangled + len) && ISDIGIT (*numptr)) + numptr++; - psize /= 10; - string_setlength (decl, saved); + if (mangled + len == numptr) + { + /* Skip over the fake parent. */ + mangled += len; + return dlang_identifier (decl, mangled, info); } - /* No match on any combinations. */ - return NULL; + /* else demangle it as a plain identifier. */ } - else - { - if (strlen (endptr) < (size_t) len) - return NULL; - - mangled = endptr; - /* May be a template instance. */ - if (len >= 5 && mangled[0] == '_' && mangled[1] == '_' - && (mangled[2] == 'T' || mangled[2] == 'U')) - return dlang_parse_template (decl, mangled, len); + return dlang_lname (decl, mangled, len); +} - switch (len) +/* Extract the plain identifier from MANGLED and prepend/append it to DECL + with special treatment for some magic compiler generted symbols. + Return the remaining string on success or NULL on failure. */ +static const char * +dlang_lname (string *decl, const char *mangled, unsigned long len) +{ + switch (len) + { + case 6: + if (strncmp (mangled, "__ctor", len) == 0) { - case 6: - if (strncmp (mangled, "__ctor", len) == 0) - { - /* Constructor symbol for a class/struct. */ - string_append (decl, "this"); - mangled += len; - return mangled; - } - else if (strncmp (mangled, "__dtor", len) == 0) - { - /* Destructor symbol for a class/struct. */ - string_append (decl, "~this"); - mangled += len; - return mangled; - } - else if (strncmp (mangled, "__initZ", len+1) == 0) - { - /* The static initialiser for a given symbol. */ - string_prepend (decl, "initializer for "); - string_setlength (decl, string_length (decl) - 1); - mangled += len; - return mangled; - } - else if (strncmp (mangled, "__vtblZ", len+1) == 0) - { - /* The vtable symbol for a given class. */ - string_prepend (decl, "vtable for "); - string_setlength (decl, string_length (decl) - 1); - mangled += len; - return mangled; - } - break; - - case 7: - if (strncmp (mangled, "__ClassZ", len+1) == 0) - { - /* The classinfo symbol for a given class. */ - string_prepend (decl, "ClassInfo for "); - string_setlength (decl, string_length (decl) - 1); - mangled += len; - return mangled; - } - break; + /* Constructor symbol for a class/struct. */ + string_append (decl, "this"); + mangled += len; + return mangled; + } + else if (strncmp (mangled, "__dtor", len) == 0) + { + /* Destructor symbol for a class/struct. */ + string_append (decl, "~this"); + mangled += len; + return mangled; + } + else if (strncmp (mangled, "__initZ", len + 1) == 0) + { + /* The static initialiser for a given symbol. */ + string_prepend (decl, "initializer for "); + string_setlength (decl, string_length (decl) - 1); + mangled += len; + return mangled; + } + else if (strncmp (mangled, "__vtblZ", len + 1) == 0) + { + /* The vtable symbol for a given class. */ + string_prepend (decl, "vtable for "); + string_setlength (decl, string_length (decl) - 1); + mangled += len; + return mangled; + } + break; - case 10: - if (strncmp (mangled, "__postblitMFZ", len+3) == 0) - { - /* Postblit symbol for a struct. */ - string_append (decl, "this(this)"); - mangled += len + 3; - return mangled; - } - break; + case 7: + if (strncmp (mangled, "__ClassZ", len + 1) == 0) + { + /* The classinfo symbol for a given class. */ + string_prepend (decl, "ClassInfo for "); + string_setlength (decl, string_length (decl) - 1); + mangled += len; + return mangled; + } + break; - case 11: - if (strncmp (mangled, "__InterfaceZ", len+1) == 0) - { - /* The interface symbol for a given class. */ - string_prepend (decl, "Interface for "); - string_setlength (decl, string_length (decl) - 1); - mangled += len; - return mangled; - } - break; + case 10: + if (strncmp (mangled, "__postblitMFZ", len + 3) == 0) + { + /* Postblit symbol for a struct. */ + string_append (decl, "this(this)"); + mangled += len + 3; + return mangled; + } + break; - case 12: - if (strncmp (mangled, "__ModuleInfoZ", len+1) == 0) - { - /* The ModuleInfo symbol for a given module. */ - string_prepend (decl, "ModuleInfo for "); - string_setlength (decl, string_length (decl) - 1); - mangled += len; - return mangled; - } - break; + case 11: + if (strncmp (mangled, "__InterfaceZ", len + 1) == 0) + { + /* The interface symbol for a given class. */ + string_prepend (decl, "Interface for "); + string_setlength (decl, string_length (decl) - 1); + mangled += len; + return mangled; } + break; - string_appendn (decl, mangled, len); - mangled += len; + case 12: + if (strncmp (mangled, "__ModuleInfoZ", len + 1) == 0) + { + /* The ModuleInfo symbol for a given module. */ + string_prepend (decl, "ModuleInfo for "); + string_setlength (decl, string_length (decl) - 1); + mangled += len; + return mangled; + } + break; } + string_appendn (decl, mangled, len); + mangled += len; + return mangled; } @@ -939,10 +1166,10 @@ dlang_parse_integer (string *decl, const char *mangled, char type) if (type == 'a' || type == 'u' || type == 'w') { /* Parse character value. */ - char value[10]; - int pos = 10; + char value[20]; + int pos = sizeof(value); int width = 0; - long val; + unsigned long val; mangled = dlang_number (mangled, &val); if (mangled == NULL) @@ -991,14 +1218,14 @@ dlang_parse_integer (string *decl, const char *mangled, char type) for (; width > 0; width--) value[--pos] = '0'; - string_appendn (decl, &(value[pos]), 10 - pos); + string_appendn (decl, &(value[pos]), sizeof(value) - pos); } string_append (decl, "'"); } else if (type == 'b') { /* Parse boolean value. */ - long val; + unsigned long val; mangled = dlang_number (mangled, &val); if (mangled == NULL) @@ -1117,7 +1344,7 @@ static const char * dlang_parse_string (string *decl, const char *mangled) { char type = *mangled; - long len; + unsigned long len; mangled++; mangled = dlang_number (mangled, &len); @@ -1179,9 +1406,10 @@ dlang_parse_string (string *decl, const char *mangled) /* Extract the static array value from MANGLED and append it to DECL. Return the remaining string on success or NULL on failure. */ static const char * -dlang_parse_arrayliteral (string *decl, const char *mangled) +dlang_parse_arrayliteral (string *decl, const char *mangled, + struct dlang_info *info) { - long elements; + unsigned long elements; mangled = dlang_number (mangled, &elements); if (mangled == NULL) @@ -1190,7 +1418,10 @@ dlang_parse_arrayliteral (string *decl, const char *mangled) string_append (decl, "["); while (elements--) { - mangled = dlang_value (decl, mangled, NULL, '\0'); + mangled = dlang_value (decl, mangled, NULL, '\0', info); + if (mangled == NULL) + return NULL; + if (elements != 0) string_append (decl, ", "); } @@ -1202,9 +1433,10 @@ dlang_parse_arrayliteral (string *decl, const char *mangled) /* Extract the associative array value from MANGLED and append it to DECL. Return the remaining string on success or NULL on failure. */ static const char * -dlang_parse_assocarray (string *decl, const char *mangled) +dlang_parse_assocarray (string *decl, const char *mangled, + struct dlang_info *info) { - long elements; + unsigned long elements; mangled = dlang_number (mangled, &elements); if (mangled == NULL) @@ -1213,9 +1445,14 @@ dlang_parse_assocarray (string *decl, const char *mangled) string_append (decl, "["); while (elements--) { - mangled = dlang_value (decl, mangled, NULL, '\0'); + mangled = dlang_value (decl, mangled, NULL, '\0', info); + if (mangled == NULL) + return NULL; + string_append (decl, ":"); - mangled = dlang_value (decl, mangled, NULL, '\0'); + mangled = dlang_value (decl, mangled, NULL, '\0', info); + if (mangled == NULL) + return NULL; if (elements != 0) string_append (decl, ", "); @@ -1228,9 +1465,10 @@ dlang_parse_assocarray (string *decl, const char *mangled) /* Extract the struct literal value for NAME from MANGLED and append it to DECL. Return the remaining string on success or NULL on failure. */ static const char * -dlang_parse_structlit (string *decl, const char *mangled, const char *name) +dlang_parse_structlit (string *decl, const char *mangled, const char *name, + struct dlang_info *info) { - long args; + unsigned long args; mangled = dlang_number (mangled, &args); if (mangled == NULL) @@ -1242,7 +1480,10 @@ dlang_parse_structlit (string *decl, const char *mangled, const char *name) string_append (decl, "("); while (args--) { - mangled = dlang_value (decl, mangled, NULL, '\0'); + mangled = dlang_value (decl, mangled, NULL, '\0', info); + if (mangled == NULL) + return NULL; + if (args != 0) string_append (decl, ", "); } @@ -1254,7 +1495,8 @@ dlang_parse_structlit (string *decl, const char *mangled, const char *name) /* Extract the value from MANGLED and append it to DECL. Return the remaining string on success or NULL on failure. */ static const char * -dlang_value (string *decl, const char *mangled, const char *name, char type) +dlang_value (string *decl, const char *mangled, const char *name, char type, + struct dlang_info *info) { if (mangled == NULL || *mangled == '\0') return NULL; @@ -1315,15 +1557,24 @@ dlang_value (string *decl, const char *mangled, const char *name, char type) case 'A': mangled++; if (type == 'H') - mangled = dlang_parse_assocarray (decl, mangled); + mangled = dlang_parse_assocarray (decl, mangled, info); else - mangled = dlang_parse_arrayliteral (decl, mangled); + mangled = dlang_parse_arrayliteral (decl, mangled, info); break; /* Struct values. */ case 'S': mangled++; - mangled = dlang_parse_structlit (decl, mangled, name); + mangled = dlang_parse_structlit (decl, mangled, name, info); + break; + + /* Function literal symbol. */ + case 'f': + mangled++; + if (strncmp (mangled, "_D", 2) != 0 + || !dlang_symbol_name_p (mangled + 2, info)) + return NULL; + mangled = dlang_parse_mangle (decl, mangled, info); break; default: @@ -1336,22 +1587,22 @@ dlang_value (string *decl, const char *mangled, const char *name, char type) /* Extract and demangle the symbol in MANGLED and append it to DECL. Returns the remaining signature on success or NULL on failure. */ static const char * -dlang_parse_mangle (string *decl, const char *mangled, - enum dlang_symbol_kinds kind) +dlang_parse_mangle (string *decl, const char *mangled, struct dlang_info *info) { /* A D mangled symbol is comprised of both scope and type information. MangleName: _D QualifiedName Type - _D QualifiedName M Type _D QualifiedName Z ^ The caller should have guaranteed that the start pointer is at the above location. + Note that type is never a function type, but only the return type of + a function or the type of a variable. */ mangled += 2; - mangled = dlang_parse_qualified (decl, mangled, dlang_top_level); + mangled = dlang_parse_qualified (decl, mangled, info, 1); if (mangled != NULL) { @@ -1360,123 +1611,97 @@ dlang_parse_mangle (string *decl, const char *mangled, mangled++; else { - string mods; - int saved; - - /* Skip over 'this' parameter. */ - if (*mangled == 'M') - mangled++; - - /* Save the type modifiers for appending at the end if needed. */ - string_init (&mods); - mangled = dlang_type_modifiers (&mods, mangled); - - if (mangled && dlang_call_convention_p (mangled)) - { - /* Skip over calling convention and attributes. */ - saved = string_length (decl); - mangled = dlang_call_convention (decl, mangled); - mangled = dlang_attributes (decl, mangled); - string_setlength (decl, saved); - - string_append (decl, "("); - mangled = dlang_function_args (decl, mangled); - string_append (decl, ")"); - - /* Add any const/immutable/shared modifier. */ - string_appendn (decl, mods.b, string_length (&mods)); - } + /* Discard the declaration or return type. */ + string type; - /* Consume the decl type of symbol. */ - saved = string_length (decl); - mangled = dlang_type (decl, mangled); - string_setlength (decl, saved); - - string_delete (&mods); + string_init (&type); + mangled = dlang_type (&type, mangled, info); + string_delete (&type); } } - /* Check that the entire symbol was successfully demangled. */ - if (kind == dlang_top_level) - { - if (mangled == NULL || *mangled != '\0') - return NULL; - } - return mangled; } /* Extract and demangle the qualified symbol in MANGLED and append it to DECL. + SUFFIX_MODIFIERS is 1 if we are printing modifiers on this after the symbol. Returns the remaining signature on success or NULL on failure. */ static const char * dlang_parse_qualified (string *decl, const char *mangled, - enum dlang_symbol_kinds kind) + struct dlang_info *info, int suffix_modifiers) { /* Qualified names are identifiers separated by their encoded length. Nested functions also encode their argument types without specifying what they return. QualifiedName: - SymbolName - SymbolName QualifiedName - SymbolName TypeFunctionNoReturn QualifiedName - SymbolName M TypeModifiers TypeFunctionNoReturn QualifiedName + SymbolFunctionName + SymbolFunctionName QualifiedName ^ + + SymbolFunctionName: + SymbolName + SymbolName TypeFunctionNoReturn + SymbolName M TypeFunctionNoReturn + SymbolName M TypeModifiers TypeFunctionNoReturn + The start pointer should be at the above location. */ size_t n = 0; do { + /* Skip over anonymous symbols. */ + if (*mangled == '0') + { + do + mangled++; + while (*mangled == '0'); + + continue; + } + if (n++) string_append (decl, "."); - /* Skip over anonymous symbols. */ - while (*mangled == '0') - mangled++; - - mangled = dlang_identifier (decl, mangled, kind); + mangled = dlang_identifier (decl, mangled, info); /* Consume the encoded arguments. However if this is not followed by the - next encoded length, then this is not a continuation of a qualified - name, in which case we backtrack and return the current unconsumed - position of the mangled decl. */ + next encoded length or mangle type, then this is not a continuation of + a qualified name, in which case we backtrack and return the current + unconsumed position of the mangled decl. */ if (mangled && (*mangled == 'M' || dlang_call_convention_p (mangled))) { + string mods; const char *start = mangled; int saved = string_length (decl); + /* Save the type modifiers for appending at the end if needed. */ + string_init (&mods); + /* Skip over 'this' parameter and type modifiers. */ if (*mangled == 'M') { mangled++; - mangled = dlang_type_modifiers (decl, mangled); + mangled = dlang_type_modifiers (&mods, mangled); string_setlength (decl, saved); } - /* The rule we expect to match in the mangled string is: - - TypeFunctionNoReturn: - CallConvention FuncAttrs Arguments ArgClose - - The calling convention and function attributes are not included - in the demangled string. */ - mangled = dlang_call_convention (decl, mangled); - mangled = dlang_attributes (decl, mangled); - string_setlength (decl, saved); + mangled = dlang_function_type_noreturn (decl, NULL, NULL, + mangled, info); + if (suffix_modifiers) + string_appendn (decl, mods.b, string_length (&mods)); - string_append (decl, "("); - mangled = dlang_function_args (decl, mangled); - string_append (decl, ")"); - - if (mangled == NULL || !ISDIGIT (*mangled)) + if (mangled == NULL || *mangled == '\0') { /* Did not match the rule we were looking for. */ mangled = start; string_setlength (decl, saved); } + + string_delete (&mods); } } - while (mangled && ISDIGIT (*mangled)); + while (mangled && dlang_symbol_name_p (mangled, info)); return mangled; } @@ -1484,9 +1709,9 @@ dlang_parse_qualified (string *decl, const char *mangled, /* Demangle the tuple from MANGLED and append it to DECL. Return the remaining string on success or NULL on failure. */ static const char * -dlang_parse_tuple (string *decl, const char *mangled) +dlang_parse_tuple (string *decl, const char *mangled, struct dlang_info *info) { - long elements; + unsigned long elements; mangled = dlang_number (mangled, &elements); if (mangled == NULL) @@ -1496,7 +1721,10 @@ dlang_parse_tuple (string *decl, const char *mangled) while (elements--) { - mangled = dlang_type (decl, mangled); + mangled = dlang_type (decl, mangled, info); + if (mangled == NULL) + return NULL; + if (elements != 0) string_append (decl, ", "); } @@ -1505,10 +1733,71 @@ dlang_parse_tuple (string *decl, const char *mangled) return mangled; } +/* Demangle the template symbol parameter from MANGLED and append it to DECL. + Return the remaining string on success or NULL on failure. */ +static const char * +dlang_template_symbol_param (string *decl, const char *mangled, + struct dlang_info *info) +{ + if (strncmp (mangled, "_D", 2) == 0 + && dlang_symbol_name_p (mangled + 2, info)) + return dlang_parse_mangle (decl, mangled, info); + + if (*mangled == 'Q') + return dlang_parse_qualified (decl, mangled, info, 0); + + unsigned long len; + const char *endptr = dlang_number (mangled, &len); + + if (endptr == NULL || len == 0) + return NULL; + + /* In template parameter symbols generated by the frontend up to 2.076, + the symbol length is encoded and the first character of the mangled + name can be a digit. This causes ambiguity issues because the digits + of the two numbers are adjacent. */ + long psize = len; + const char *pend; + int saved = string_length (decl); + + /* Work backwards until a match is found. */ + for (pend = endptr; endptr != NULL; pend--) + { + mangled = pend; + + /* Reached the beginning of the pointer to the name length, + try parsing the entire symbol. */ + if (psize == 0) + { + psize = len; + pend = endptr; + endptr = NULL; + } + + /* Check whether template parameter is a function with a valid + return type or an untyped identifier. */ + if (dlang_symbol_name_p (mangled, info)) + mangled = dlang_parse_qualified (decl, mangled, info, 0); + else if (strncmp (mangled, "_D", 2) == 0 + && dlang_symbol_name_p (mangled + 2, info)) + mangled = dlang_parse_mangle (decl, mangled, info); + + /* Check for name length mismatch. */ + if (mangled && (endptr == NULL || (mangled - pend) == psize)) + return mangled; + + psize /= 10; + string_setlength (decl, saved); + } + + /* No match on any combinations. */ + return NULL; +} + /* Demangle the argument list from MANGLED and append it to DECL. Return the remaining string on success or NULL on failure. */ static const char * -dlang_template_args (string *decl, const char *mangled) +dlang_template_args (string *decl, const char *mangled, struct dlang_info *info) { size_t n = 0; @@ -1532,11 +1821,11 @@ dlang_template_args (string *decl, const char *mangled) { case 'S': /* Symbol parameter. */ mangled++; - mangled = dlang_identifier (decl, mangled, dlang_template_param); + mangled = dlang_template_symbol_param (decl, mangled, info); break; case 'T': /* Type parameter. */ mangled++; - mangled = dlang_type (decl, mangled); + mangled = dlang_type (decl, mangled, info); break; case 'V': /* Value parameter. */ { @@ -1547,18 +1836,41 @@ dlang_template_args (string *decl, const char *mangled) mangled++; type = *mangled; + if (type == 'Q') + { + /* Value type is a back reference, peek at the real type. */ + const char *backref; + if (dlang_backref (mangled, &backref, info) == NULL) + return NULL; + + type = *backref; + } + /* In the few instances where the type is actually desired in the output, it should precede the value from dlang_value. */ string_init (&name); - mangled = dlang_type (&name, mangled); + mangled = dlang_type (&name, mangled, info); string_need (&name, 1); *(name.p) = '\0'; - mangled = dlang_value (decl, mangled, name.b, type); + mangled = dlang_value (decl, mangled, name.b, type, info); string_delete (&name); break; } + case 'X': /* Externally mangled parameter. */ + { + unsigned long len; + const char *endptr; + + mangled++; + endptr = dlang_number (mangled, &len); + if (endptr == NULL || strlen (endptr) < len) + return NULL; + string_appendn (decl, endptr, len); + mangled = endptr + len; + break; + } default: return NULL; } @@ -1568,12 +1880,14 @@ dlang_template_args (string *decl, const char *mangled) } /* Extract and demangle the template symbol in MANGLED, expected to - be made up of LEN characters, and append it to DECL. + be made up of LEN characters (-1 if unknown), and append it to DECL. Returns the remaining signature on success or NULL on failure. */ static const char * -dlang_parse_template (string *decl, const char *mangled, long len) +dlang_parse_template (string *decl, const char *mangled, + struct dlang_info *info, unsigned long len) { const char *start = mangled; + string args; /* Template instance names have the types and values of its parameters encoded into it. @@ -1587,26 +1901,42 @@ dlang_parse_template (string *decl, const char *mangled, long len) */ /* Template symbol. */ - if (!ISDIGIT (mangled[3]) || mangled[3] == '0') + if (!dlang_symbol_name_p (mangled + 3, info) || mangled[3] == '0') return NULL; mangled += 3; /* Template identifier. */ - mangled = dlang_identifier (decl, mangled, dlang_template_ident); + mangled = dlang_identifier (decl, mangled, info); /* Template arguments. */ + string_init (&args); + mangled = dlang_template_args (&args, mangled, info); + string_append (decl, "!("); - mangled = dlang_template_args (decl, mangled); + string_appendn (decl, args.b, string_length (&args)); string_append (decl, ")"); + string_delete (&args); + /* Check for template name length mismatch. */ - if (mangled && (mangled - start) != len) + if (len != TEMPLATE_LENGTH_UNKNOWN + && mangled + && (unsigned long) (mangled - start) != len) return NULL; return mangled; } +/* Initialize the information structure we use to pass around information. */ +static void +dlang_demangle_init_info (const char *mangled, int last_backref, + struct dlang_info *info) +{ + info->s = mangled; + info->last_backref = last_backref; +} + /* Extract and demangle the symbol in MANGLED. Returns the demangled signature on success or NULL on failure. */ @@ -1630,7 +1960,13 @@ dlang_demangle (const char *mangled, int option ATTRIBUTE_UNUSED) } else { - if (dlang_parse_mangle (&decl, mangled, dlang_top_level) == NULL) + struct dlang_info info; + + dlang_demangle_init_info (mangled, strlen (mangled), &info); + mangled = dlang_parse_mangle (&decl, mangled, &info); + + /* Check that the entire symbol was successfully demangled. */ + if (mangled == NULL || *mangled != '\0') string_delete (&decl); } |