Merge pull request #2720 from mono/fix-39325

[mono.git] / mono / mini / genmdesc.c

diff --git a/mono/mini/genmdesc.c b/mono/mini/genmdesc.c
index 0cd3f3b5c815699c87ccd4a2beb6e9e55f633102..7118e19c8cec06cd9fb7588d5e7c89f2e9564706 100644 (file)
--- a/mono/mini/genmdesc.c
+++ b/mono/mini/genmdesc.c
@@ -54,6 +54,14 @@ static GHashTable *template_table;
 
 #define eat_whitespace(s) while (*(s) && isspace (*(s))) s++;
 
+// Per spec isalnum() expects input in the range 0-255
+// and can misbehave if you pass in a signed char.
+static int
+isalnum_char(char c)
+{
+       return isalnum ((unsigned char)c);
+}
+
 static int
 load_file (const char *name) {
        FILE *f;
@@ -99,7 +107,7 @@ load_file (const char *name) {
                        is_template = TRUE;
                        desc = g_new0 (OpDesc, 1);
                } else {
-                       desc = g_hash_table_lookup (table, str);
+                       desc = (OpDesc *)g_hash_table_lookup (table, str);
                        if (!desc)
                                g_error ("Invalid opcode '%s' at line %d in %s\n", str, line, name);
                        if (desc->desc)
@@ -163,9 +171,9 @@ load_file (const char *name) {
                                OpDesc *tdesc;
                                p += 9;
                                tname = p;
-                               while (*p && isalnum (*p)) ++p;
+                               while (*p && isalnum_char (*p)) ++p;
                                *p++ = 0;
-                               tdesc = g_hash_table_lookup (template_table, tname);
+                               tdesc = (OpDesc *)g_hash_table_lookup (template_table, tname);
                                if (!tdesc)
                                        g_error ("Invalid template name %s at '%s' at line %d in %s\n", tname, p, line, name);
                                for (i = 0; i < MONO_INST_MAX; ++i) {
@@ -181,7 +189,7 @@ load_file (const char *name) {
                                        g_error ("Duplicated name tag in template %s at '%s' at line %d in %s\n", desc->name, p, line, name);
                                p += 5;
                                tname = p;
-                               while (*p && isalnum (*p)) ++p;
+                               while (*p && isalnum_char (*p)) ++p;
                                *p++ = 0;
                                if (g_hash_table_lookup (template_table, tname))
                                        g_error ("Duplicated template %s at line %d in %s\n", tname, line, name);
@@ -220,7 +228,7 @@ init_table (void) {
 
 static void
 output_char (FILE *f, char c) {
-       if (isalnum (c))
+       if (isalnum_char (c))
                fprintf (f, "%c", c);
        else
                fprintf (f, "\\x%x\" \"", (guint8)c);