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Realloc: Make behavior of realloc(ptr, 0) configurable.

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This commit is contained in:
David T. Goldblatt
2019-09-23 17:56:19 -07:00
committed by David Goldblatt
parent ee961c2310
commit 9cfa805947
15 changed files with 256 additions and 26 deletions
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2
include/jemalloc/internal/jemalloc_internal_externs.h
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@@ -18,6 +18,8 @@ extern bool opt_utrace;
extern bool opt_xmalloc;
extern bool opt_zero;
extern unsigned opt_narenas;
extern zero_realloc_action_t opt_zero_realloc_action;
extern const char *zero_realloc_mode_names[];
/* Number of CPUs. */
extern unsigned ncpus;

11
include/jemalloc/internal/jemalloc_internal_types.h
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@@ -12,6 +12,17 @@ typedef unsigned szind_t;
/* Processor / core id type. */
typedef int malloc_cpuid_t;
/* When realloc(non-null-ptr, 0) is called, what happens? */
enum zero_realloc_action_e {
/* Realloc(ptr, 0) is free(ptr); return malloc(0); */
zero_realloc_action_strict = 0,
/* Realloc(ptr, 0) is free(ptr); */
zero_realloc_action_free = 1,
/* Realloc(ptr, 0) aborts. */
zero_realloc_action_abort = 2
};
typedef enum zero_realloc_action_e zero_realloc_action_t;
/*
* Flags bits:
*