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Date: Wed, 05 Aug 2015 14:43:45 +0100
From: David Howells <dhowells@...hat.com>
To: keyrings@...ux-nfs.org
Cc: mcgrof@...il.com, zohar@...ux.vnet.ibm.com, kyle@...nel.org,
linux-kernel@...r.kernel.org,
linux-security-module@...r.kernel.org, dwmw2@...radead.org
Subject: [PATCH 02/27] ASN.1: Copy string names to tokens in ASN.1 compiler
[ver #7]
Copy string names to tokens in ASN.1 compiler rather than storing a pointer
into the source text. This means we don't have to use "%*.*s" all over the
place.
Signed-off-by: David Howells <dhowells@...hat.com>
Reviewed-by: David Woodhouse <David.Woodhouse@...el.com>
---
scripts/asn1_compiler.c | 155 ++++++++++++++++++++++-------------------------
1 file changed, 73 insertions(+), 82 deletions(-)
diff --git a/scripts/asn1_compiler.c b/scripts/asn1_compiler.c
index 6e4ba992a51f..e000f44e37b8 100644
--- a/scripts/asn1_compiler.c
+++ b/scripts/asn1_compiler.c
@@ -294,8 +294,8 @@ static const char *const directives[NR__DIRECTIVES] = {
struct action {
struct action *next;
+ char *name;
unsigned char index;
- char name[];
};
static struct action *action_list;
@@ -306,7 +306,7 @@ struct token {
enum token_type token_type : 8;
unsigned char size;
struct action *action;
- const char *value;
+ char *content;
struct type *type;
};
@@ -328,11 +328,9 @@ static int directive_compare(const void *_key, const void *_pdir)
dlen = strlen(dir);
clen = (dlen < token->size) ? dlen : token->size;
- //debug("cmp(%*.*s,%s) = ",
- // (int)token->size, (int)token->size, token->value,
- // dir);
+ //debug("cmp(%s,%s) = ", token->content, dir);
- val = memcmp(token->value, dir, clen);
+ val = memcmp(token->content, dir, clen);
if (val != 0) {
//debug("%d [cmp]\n", val);
return val;
@@ -352,7 +350,7 @@ static int directive_compare(const void *_key, const void *_pdir)
static void tokenise(char *buffer, char *end)
{
struct token *tokens;
- char *line, *nl, *p, *q;
+ char *line, *nl, *start, *p, *q;
unsigned tix, lineno;
/* Assume we're going to have half as many tokens as we have
@@ -411,11 +409,11 @@ static void tokenise(char *buffer, char *end)
break;
tokens[tix].line = lineno;
- tokens[tix].value = p;
+ start = p;
/* Handle string tokens */
if (isalpha(*p)) {
- const char **dir;
+ const char **dir, *start = p;
/* Can be a directive, type name or element
* name. Find the end of the name.
@@ -426,10 +424,18 @@ static void tokenise(char *buffer, char *end)
tokens[tix].size = q - p;
p = q;
+ tokens[tix].content = malloc(tokens[tix].size + 1);
+ if (!tokens[tix].content) {
+ perror(NULL);
+ exit(1);
+ }
+ memcpy(tokens[tix].content, start, tokens[tix].size);
+ tokens[tix].content[tokens[tix].size] = 0;
+
/* If it begins with a lowercase letter then
* it's an element name
*/
- if (islower(tokens[tix].value[0])) {
+ if (islower(tokens[tix].content[0])) {
tokens[tix++].token_type = TOKEN_ELEMENT_NAME;
continue;
}
@@ -458,6 +464,13 @@ static void tokenise(char *buffer, char *end)
q++;
tokens[tix].size = q - p;
p = q;
+ tokens[tix].content = malloc(tokens[tix].size + 1);
+ if (!tokens[tix].content) {
+ perror(NULL);
+ exit(1);
+ }
+ memcpy(tokens[tix].content, start, tokens[tix].size);
+ tokens[tix].content[tokens[tix].size] = 0;
tokens[tix++].token_type = TOKEN_NUMBER;
continue;
}
@@ -466,6 +479,7 @@ static void tokenise(char *buffer, char *end)
if (memcmp(p, "::=", 3) == 0) {
p += 3;
tokens[tix].size = 3;
+ tokens[tix].content = "::=";
tokens[tix++].token_type = TOKEN_ASSIGNMENT;
continue;
}
@@ -475,12 +489,14 @@ static void tokenise(char *buffer, char *end)
if (memcmp(p, "({", 2) == 0) {
p += 2;
tokens[tix].size = 2;
+ tokens[tix].content = "({";
tokens[tix++].token_type = TOKEN_OPEN_ACTION;
continue;
}
if (memcmp(p, "})", 2) == 0) {
p += 2;
tokens[tix].size = 2;
+ tokens[tix].content = "})";
tokens[tix++].token_type = TOKEN_CLOSE_ACTION;
continue;
}
@@ -491,22 +507,27 @@ static void tokenise(char *buffer, char *end)
switch (*p) {
case '{':
p += 1;
+ tokens[tix].content = "{";
tokens[tix++].token_type = TOKEN_OPEN_CURLY;
continue;
case '}':
p += 1;
+ tokens[tix].content = "}";
tokens[tix++].token_type = TOKEN_CLOSE_CURLY;
continue;
case '[':
p += 1;
+ tokens[tix].content = "[";
tokens[tix++].token_type = TOKEN_OPEN_SQUARE;
continue;
case ']':
p += 1;
+ tokens[tix].content = "]";
tokens[tix++].token_type = TOKEN_CLOSE_SQUARE;
continue;
case ',':
p += 1;
+ tokens[tix].content = ",";
tokens[tix++].token_type = TOKEN_COMMA;
continue;
default:
@@ -527,10 +548,7 @@ static void tokenise(char *buffer, char *end)
{
int n;
for (n = 0; n < nr_tokens; n++)
- debug("Token %3u: '%*.*s'\n",
- n,
- (int)token_list[n].size, (int)token_list[n].size,
- token_list[n].value);
+ debug("Token %3u: '%s'\n", n, token_list[n].content);
}
#endif
}
@@ -709,7 +727,7 @@ static int type_index_compare(const void *_a, const void *_b)
if ((*a)->name->size != (*b)->name->size)
return (*a)->name->size - (*b)->name->size;
else
- return memcmp((*a)->name->value, (*b)->name->value,
+ return memcmp((*a)->name->content, (*b)->name->content,
(*a)->name->size);
}
@@ -722,7 +740,7 @@ static int type_finder(const void *_key, const void *_ti)
if (token->size != type->name->size)
return token->size - type->name->size;
else
- return memcmp(token->value, type->name->value,
+ return memcmp(token->content, type->name->content,
token->size);
}
@@ -776,10 +794,7 @@ static void build_type_list(void)
#if 0
for (n = 0; n < nr_types; n++) {
struct type *type = type_index[n];
- debug("- %*.*s\n",
- (int)type->name->size,
- (int)type->name->size,
- type->name->value);
+ debug("- %*.*s\n", type->name->content);
}
#endif
}
@@ -809,9 +824,8 @@ static void parse(void)
type->element->type_def = type;
if (cursor != type[1].name) {
- fprintf(stderr, "%s:%d: Parse error at token '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Parse error at token '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
@@ -878,34 +892,31 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
cursor++;
break;
default:
- fprintf(stderr, "%s:%d: Unrecognised tag class token '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Unrecognised tag class token '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
if (cursor >= end)
goto overrun_error;
if (cursor->token_type != TOKEN_NUMBER) {
- fprintf(stderr, "%s:%d: Missing tag number '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Missing tag number '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
element->tag &= ~0x1f;
- element->tag |= strtoul(cursor->value, &p, 10);
+ element->tag |= strtoul(cursor->content, &p, 10);
element->flags |= ELEMENT_TAG_SPECIFIED;
- if (p - cursor->value != cursor->size)
+ if (p - cursor->content != cursor->size)
abort();
cursor++;
if (cursor >= end)
goto overrun_error;
if (cursor->token_type != TOKEN_CLOSE_SQUARE) {
- fprintf(stderr, "%s:%d: Missing closing square bracket '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Missing closing square bracket '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
cursor++;
@@ -1005,9 +1016,8 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
ref = bsearch(cursor, type_index, nr_types, sizeof(type_index[0]),
type_finder);
if (!ref) {
- fprintf(stderr, "%s:%d: Type '%*.*s' undefined\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Type '%s' undefined\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
cursor->type = *ref;
@@ -1056,9 +1066,8 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
break;
default:
- fprintf(stderr, "%s:%d: Token '%*.*s' does not introduce a type\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Token '%s' does not introduce a type\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
@@ -1075,20 +1084,18 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
if (cursor >= end)
goto overrun_error;
if (cursor->token_type != TOKEN_ELEMENT_NAME) {
- fprintf(stderr, "%s:%d: Token '%*.*s' is not an action function name\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Token '%s' is not an action function name\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
- action = malloc(sizeof(struct action) + cursor->size + 1);
+ action = malloc(sizeof(struct action));
if (!action) {
perror(NULL);
exit(1);
}
action->index = 0;
- memcpy(action->name, cursor->value, cursor->size);
- action->name[cursor->size] = 0;
+ action->name = cursor->content;
for (ppaction = &action_list;
*ppaction;
@@ -1118,9 +1125,8 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
if (cursor >= end)
goto overrun_error;
if (cursor->token_type != TOKEN_CLOSE_ACTION) {
- fprintf(stderr, "%s:%d: Missing close action, got '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Missing close action, got '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
cursor++;
@@ -1130,9 +1136,8 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
return top;
parse_error:
- fprintf(stderr, "%s:%d: Unexpected token '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Unexpected token '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
overrun_error:
@@ -1150,9 +1155,8 @@ static struct element *parse_compound(struct token **_cursor, struct token *end,
struct token *cursor = *_cursor, *name;
if (cursor->token_type != TOKEN_OPEN_CURLY) {
- fprintf(stderr, "%s:%d: Expected compound to start with brace not '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Expected compound to start with brace not '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
cursor++;
@@ -1193,9 +1197,8 @@ static struct element *parse_compound(struct token **_cursor, struct token *end,
children->flags &= ~ELEMENT_CONDITIONAL;
if (cursor->token_type != TOKEN_CLOSE_CURLY) {
- fprintf(stderr, "%s:%d: Expected compound closure, got '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Expected compound closure, got '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
cursor++;
@@ -1212,10 +1215,8 @@ static void dump_element(const struct element *e, int level)
{
const struct element *c;
const struct type *t = e->type_def;
- const char *name = e->name ? e->name->value : ".";
- int nsize = e->name ? e->name->size : 1;
- const char *tname = t && t->name ? t->name->value : ".";
- int tnsize = t && t->name ? t->name->size : 1;
+ const char *name = e->name ? e->name->content : ".";
+ const char *tname = t && t->name ? t->name->content : ".";
char tag[32];
if (e->class == 0 && e->method == 0 && e->tag == 0)
@@ -1231,7 +1232,7 @@ static void dump_element(const struct element *e, int level)
asn1_methods[e->method],
e->tag);
- printf("%c%c%c%c%c %c %*s[*] \e[33m%s\e[m %*.*s %*.*s \e[35m%s\e[m\n",
+ printf("%c%c%c%c%c %c %*s[*] \e[33m%s\e[m %s %s \e[35m%s\e[m\n",
e->flags & ELEMENT_IMPLICIT ? 'I' : '-',
e->flags & ELEMENT_EXPLICIT ? 'E' : '-',
e->flags & ELEMENT_TAG_SPECIFIED ? 'T' : '-',
@@ -1240,8 +1241,8 @@ static void dump_element(const struct element *e, int level)
"-tTqQcaro"[e->compound],
level, "",
tag,
- tnsize, tnsize, tname,
- nsize, nsize, name,
+ tname,
+ name,
e->action ? e->action->name : "");
if (e->compound == TYPE_REF)
dump_element(e->type->type->element, level + 3);
@@ -1454,9 +1455,7 @@ static void render_element(FILE *out, struct element *e, struct element *tag)
outofline = 1;
if (e->type_def && out) {
- render_more(out, "\t// %*.*s\n",
- (int)e->type_def->name->size, (int)e->type_def->name->size,
- e->type_def->name->value);
+ render_more(out, "\t// %s\n", e->type_def->name->content);
}
/* Render the operation */
@@ -1468,9 +1467,7 @@ static void render_element(FILE *out, struct element *e, struct element *tag)
render_opcode(out, "ASN1_OP_%sMATCH_ANY%s%s,",
cond, act, skippable ? "_OR_SKIP" : "");
if (e->name)
- render_more(out, "\t\t// %*.*s",
- (int)e->name->size, (int)e->name->size,
- e->name->value);
+ render_more(out, "\t\t// %s", e->name->content);
render_more(out, "\n");
goto dont_render_tag;
@@ -1503,9 +1500,7 @@ static void render_element(FILE *out, struct element *e, struct element *tag)
x = tag ?: e;
if (x->name)
- render_more(out, "\t\t// %*.*s",
- (int)x->name->size, (int)x->name->size,
- x->name->value);
+ render_more(out, "\t\t// %s", x->name->content);
render_more(out, "\n");
/* Render the tag */
@@ -1543,10 +1538,8 @@ dont_render_tag:
* skipability */
render_opcode(out, "_jump_target(%u),", e->entry_index);
if (e->type_def && e->type_def->name)
- render_more(out, "\t\t// --> %*.*s",
- (int)e->type_def->name->size,
- (int)e->type_def->name->size,
- e->type_def->name->value);
+ render_more(out, "\t\t// --> %s",
+ e->type_def->name->content);
render_more(out, "\n");
if (!(e->flags & ELEMENT_RENDERED)) {
e->flags |= ELEMENT_RENDERED;
@@ -1571,10 +1564,8 @@ dont_render_tag:
* skipability */
render_opcode(out, "_jump_target(%u),", e->entry_index);
if (e->type_def && e->type_def->name)
- render_more(out, "\t\t// --> %*.*s",
- (int)e->type_def->name->size,
- (int)e->type_def->name->size,
- e->type_def->name->value);
+ render_more(out, "\t\t// --> %s",
+ e->type_def->name->content);
render_more(out, "\n");
if (!(e->flags & ELEMENT_RENDERED)) {
e->flags |= ELEMENT_RENDERED;
--
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