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authorgary <gary@138bc75d-0d04-0410-961f-82ee72b054a4>2013-10-25 13:56:51 +0000
committerTom Tromey <tromey@redhat.com>2013-11-08 11:11:41 -0700
commit9548bbede51868a9a780d7d21ae16ac13e8bdf9b (patch)
tree14f29c8f5dc99e8be5a547a9a73a180a961e59d2 /libiberty/cp-demangle.c
parentae6da67e35733eb8be443ae46ca9a24f8037a75d (diff)
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libiberty/ 2013-10-25 Gary Benson <gbenson@redhat.com>
* cp-demangle.c (struct d_saved_scope): New structure. (struct d_print_info): New fields saved_scopes and num_saved_scopes. (d_print_init): Initialize the above. (d_print_free): New function. (cplus_demangle_print_callback): Call the above. (d_copy_templates): New function. (d_print_comp): New variables saved_templates and need_template_restore. [DEMANGLE_COMPONENT_REFERENCE, DEMANGLE_COMPONENT_RVALUE_REFERENCE]: Capture scope the first time the component is traversed, and use the captured scope for subsequent traversals. * testsuite/demangle-expected: Add regression test. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204068 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libiberty/cp-demangle.c')
-rw-r--r--libiberty/cp-demangle.c131
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;
}