grep/pcre2: add GREP_PCRE2_DEBUG_MALLOC debug mode
Add optional printing of PCREv2 allocations to stderr for a developer
who manually changes the GREP_PCRE2_DEBUG_MALLOC definition to "1".
You need to manually change the definition in the source file similar
to the DEBUG_MAILMAP, there's no Makefile knob for this.
This will be referenced a subsequent commit, and is generally useful
to manually see what's going on with PCREv2 allocations while working
on that code.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/grep.c b/grep.c
index f96d86c..7d262a2 100644
--- a/grep.c
+++ b/grep.c
@@ -42,15 +42,25 @@ static struct grep_opt grep_defaults = {
#ifdef USE_LIBPCRE2
static pcre2_general_context *pcre2_global_context;
+#define GREP_PCRE2_DEBUG_MALLOC 0
static void *pcre2_malloc(PCRE2_SIZE size, MAYBE_UNUSED void *memory_data)
{
void *pointer = malloc(size);
+#if GREP_PCRE2_DEBUG_MALLOC
+ static int count = 1;
+ fprintf(stderr, "PCRE2:%p -> #%02d: alloc(%lu)\n", pointer, count++, size);
+#endif
return pointer;
}
static void pcre2_free(void *pointer, MAYBE_UNUSED void *memory_data)
{
+#if GREP_PCRE2_DEBUG_MALLOC
+ static int count = 1;
+ if (pointer)
+ fprintf(stderr, "PCRE2:%p -> #%02d: free()\n", pointer, count++);
+#endif
free(pointer);
}
#endif
