diff options
Diffstat (limited to 'libiberty/cp-demangle.c')
| -rw-r--r-- | libiberty/cp-demangle.c | 131 |
1 files changed, 129 insertions, 2 deletions
diff --git a/libiberty/cp-demangle.c b/libiberty/cp-demangle.c index 0398982..7be9804 100644 --- a/libiberty/cp-demangle.c +++ b/libiberty/cp-demangle.c @@ -275,6 +275,18 @@ struct d_growable_string int allocation_failure; }; +/* A demangle component and some scope captured when it was first + traversed. */ + +struct d_saved_scope +{ + /* The component whose scope this is. */ + const struct demangle_component *container; + /* The list of templates, if any, that was current when this + scope was captured. */ + struct d_print_template *templates; +}; + enum { D_PRINT_BUFFER_LENGTH = 256 }; struct d_print_info { @@ -302,6 +314,10 @@ struct d_print_info int pack_index; /* Number of d_print_flush calls so far. */ unsigned long int flush_count; + /* Array of saved scopes for evaluating substitutions. */ + struct d_saved_scope *saved_scopes; + /* Number of saved scopes in the above array. */ + int num_saved_scopes; }; #ifdef CP_DEMANGLE_DEBUG @@ -3665,6 +3681,30 @@ d_print_init (struct d_print_info *dpi, demangle_callbackref callback, dpi->opaque = opaque; dpi->demangle_failure = 0; + + dpi->saved_scopes = NULL; + dpi->num_saved_scopes = 0; +} + +/* Free a print information structure. */ + +static void +d_print_free (struct d_print_info *dpi) +{ + int i; + + for (i = 0; i < dpi->num_saved_scopes; i++) + { + struct d_print_template *ts, *tn; + + for (ts = dpi->saved_scopes[i].templates; ts != NULL; ts = tn) + { + tn = ts->next; + free (ts); + } + } + + free (dpi->saved_scopes); } /* Indicate that an error occurred during printing, and test for error. */ @@ -3749,6 +3789,7 @@ cplus_demangle_print_callback (int options, demangle_callbackref callback, void *opaque) { struct d_print_info dpi; + int success; d_print_init (&dpi, callback, opaque); @@ -3756,7 +3797,9 @@ cplus_demangle_print_callback (int options, d_print_flush (&dpi); - return ! d_print_saw_error (&dpi); + success = ! d_print_saw_error (&dpi); + d_print_free (&dpi); + return success; } /* Turn components into a human readable string. OPTIONS is the @@ -3913,6 +3956,36 @@ d_print_subexpr (struct d_print_info *dpi, int options, d_append_char (dpi, ')'); } +/* Return a shallow copy of the current list of templates. + On error d_print_error is called and a partial list may + be returned. Whatever is returned must be freed. */ + +static struct d_print_template * +d_copy_templates (struct d_print_info *dpi) +{ + struct d_print_template *src, *result, **link = &result; + + for (src = dpi->templates; src != NULL; src = src->next) + { + struct d_print_template *dst = + malloc (sizeof (struct d_print_template)); + + if (dst == NULL) + { + d_print_error (dpi); + break; + } + + dst->template_decl = src->template_decl; + *link = dst; + link = &dst->next; + } + + *link = NULL; + + return result; +} + /* Subroutine to handle components. */ static void @@ -3923,6 +3996,13 @@ d_print_comp (struct d_print_info *dpi, int options, without needing to modify *dc. */ const struct demangle_component *mod_inner = NULL; + /* Variable used to store the current templates while a previously + captured scope is used. */ + struct d_print_template *saved_templates; + + /* Nonzero if templates have been stored in the above variable. */ + int need_template_restore = 0; + if (dc == NULL) { d_print_error (dpi); @@ -4291,12 +4371,56 @@ d_print_comp (struct d_print_info *dpi, int options, const struct demangle_component *sub = d_left (dc); if (sub->type == DEMANGLE_COMPONENT_TEMPLATE_PARAM) { - struct demangle_component *a = d_lookup_template_argument (dpi, sub); + struct demangle_component *a; + struct d_saved_scope *scope = NULL, *scopes; + int i; + + for (i = 0; i < dpi->num_saved_scopes; i++) + if (dpi->saved_scopes[i].container == sub) + scope = &dpi->saved_scopes[i]; + + if (scope == NULL) + { + /* This is the first time SUB has been traversed. + We need to capture the current templates so + they can be restored if SUB is reentered as a + substitution. */ + ++dpi->num_saved_scopes; + scopes = realloc (dpi->saved_scopes, + sizeof (struct d_saved_scope) + * dpi->num_saved_scopes); + if (scopes == NULL) + { + d_print_error (dpi); + return; + } + + dpi->saved_scopes = scopes; + scope = dpi->saved_scopes + (dpi->num_saved_scopes - 1); + + scope->container = sub; + scope->templates = d_copy_templates (dpi); + if (d_print_saw_error (dpi)) + return; + } + else + { + /* This traversal is reentering SUB as a substition. + Restore the original templates temporarily. */ + saved_templates = dpi->templates; + dpi->templates = scope->templates; + need_template_restore = 1; + } + + a = d_lookup_template_argument (dpi, sub); if (a && a->type == DEMANGLE_COMPONENT_TEMPLATE_ARGLIST) a = d_index_template_argument (a, dpi->pack_index); if (a == NULL) { + if (need_template_restore) + dpi->templates = saved_templates; + d_print_error (dpi); return; } @@ -4344,6 +4468,9 @@ d_print_comp (struct d_print_info *dpi, int options, dpi->modifiers = dpm.next; + if (need_template_restore) + dpi->templates = saved_templates; + return; } |