Merge remote-tracking branch 'origin/tqtc/lts-5.15.13' into tqtc/lts-5.15-opensourcev5.15.13-lts-lgpl

Change-Id: Ie9df84af22570d601db002e391a1a0d97e7cd9e1

1 files changed, 8 insertions, 9 deletions

diff --git a/src/3rdparty/pcre2/src/pcre2_internal.h b/src/3rdparty/pcre2/src/pcre2_internal.h
index fe7a0e005a..92dd3138d4 100644
--- a/src/3rdparty/pcre2/src/pcre2_internal.h
+++ b/src/3rdparty/pcre2/src/pcre2_internal.h
@@ -220,18 +220,17 @@ not rely on this. */
 
 #define COMPILE_ERROR_BASE 100
 
-/* The initial frames vector for remembering backtracking points in
-pcre2_match() is allocated on the system stack, of this size (bytes). The size
-must be a multiple of sizeof(PCRE2_SPTR) in all environments, so making it a
-multiple of 8 is best. Typical frame sizes are a few hundred bytes (it depends
-on the number of capturing parentheses) so 20KiB handles quite a few frames. A
-larger vector on the heap is obtained for patterns that need more frames. The
-maximum size of this can be limited. */
+/* The initial frames vector for remembering pcre2_match() backtracking points
+is allocated on the heap, of this size (bytes) or ten times the frame size if
+larger, unless the heap limit is smaller. Typical frame sizes are a few hundred
+bytes (it depends on the number of capturing parentheses) so 20KiB handles
+quite a few frames. A larger vector on the heap is obtained for matches that
+need more frames, subject to the heap limit. */
 
 #define START_FRAMES_SIZE 20480
 
-/* Similarly, for DFA matching, an initial internal workspace vector is
-allocated on the stack. */
+/* For DFA matching, an initial internal workspace vector is allocated on the
+stack. The heap is used only if this turns out to be too small. */
 
 #define DFA_START_RWS_SIZE 30720