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Improve DBC in isc_mem_free

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Unlike standard free(), isc_mem_free() is not a no-op when passed a
NULL pointer. For size accounting purposes it calls sallocx(), which
crashes when passed a NULL pointer. To get more helpful diagnostics,
REQUIRE() that the pointer is not NULL so that when the programmer
makes a mistake they get a backtrace that shows what went wrong.
This commit is contained in:
Tony Finch
2022-06-13 12:00:01 +01:00
parent 05d60071a7
commit a4930e1969
1 changed files with 1 additions and 0 deletions
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lib/isc/mem.c
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@@ -981,6 +981,7 @@ isc__mem_free(isc_mem_t *ctx, void *ptr FLARG) {
size_t size = 0;
REQUIRE(VALID_CONTEXT(ctx));
REQUIRE(ptr != NULL);
size = sallocx(ptr, 0);