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-rw-r--r--Build/source/libs/harfbuzz/harfbuzz-src/src/hb-sanitize.hh15
1 files changed, 15 insertions, 0 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-sanitize.hh b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-sanitize.hh
index 2e536c7a814..65c2772201d 100644
--- a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-sanitize.hh
+++ b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-sanitize.hh
@@ -123,6 +123,7 @@ struct hb_sanitize_context_t :
hb_sanitize_context_t () :
start (nullptr), end (nullptr),
max_ops (0), max_subtables (0),
+ recursion_depth (0),
writable (false), edit_count (0),
blob (nullptr),
num_glyphs (65536),
@@ -205,6 +206,7 @@ struct hb_sanitize_context_t :
(unsigned) HB_SANITIZE_MAX_OPS_MAX);
this->edit_count = 0;
this->debug_depth = 0;
+ this->recursion_depth = 0;
DEBUG_MSG_LEVEL (SANITIZE, start, 0, +1,
"start [%p..%p] (%lu bytes)",
@@ -278,6 +280,18 @@ struct hb_sanitize_context_t :
return this->check_range (base, a, b, hb_static_size (T));
}
+ bool check_start_recursion (int max_depth)
+ {
+ if (unlikely (recursion_depth >= max_depth)) return false;
+ return ++recursion_depth;
+ }
+
+ bool end_recursion (bool result)
+ {
+ recursion_depth--;
+ return result;
+ }
+
template <typename Type>
bool check_struct (const Type *obj) const
{ return likely (this->check_range (obj, obj->min_size)); }
@@ -389,6 +403,7 @@ struct hb_sanitize_context_t :
const char *start, *end;
mutable int max_ops, max_subtables;
private:
+ int recursion_depth;
bool writable;
unsigned int edit_count;
hb_blob_t *blob;