finish migration away from config.h
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06149aa156
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20
Makefile
20
Makefile
@ -6,6 +6,14 @@ CONFIG_WRITE_AFTER_FREE_CHECK := true
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CONFIG_SLOT_RANDOMIZE := true
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CONFIG_ZERO_ON_FREE := true
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CONFIG_SLAB_CANARY := true
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CONFIG_SLAB_QUARANTINE_RANDOM_SIZE := 0
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CONFIG_SLAB_QUARANTINE_QUEUE_SIZE := 0
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CONFIG_GUARD_SLABS_INTERVAL := 1
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CONFIG_GUARD_SIZE_DIVISOR := 2
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CONFIG_REGION_QUARANTINE_RANDOM_SIZE := 128
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CONFIG_REGION_QUARANTINE_QUEUE_SIZE := 1024
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CONFIG_REGION_QUARANTINE_SKIP_THRESHOLD := 33554432
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CONFIG_FREE_SLABS_QUARANTINE_RANDOM_SIZE := 32
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define safe_flag
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$(shell $(CC) -E $1 - </dev/null >/dev/null 2>&1 && echo $1)
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@ -61,13 +69,21 @@ CPPFLAGS += \
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-DZERO_ON_FREE=$(CONFIG_ZERO_ON_FREE) \
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-DWRITE_AFTER_FREE_CHECK=$(CONFIG_WRITE_AFTER_FREE_CHECK) \
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-DSLOT_RANDOMIZE=$(CONFIG_SLOT_RANDOMIZE) \
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-DSLAB_CANARY=$(CONFIG_SLAB_CANARY)
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-DSLAB_CANARY=$(CONFIG_SLAB_CANARY) \
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-DSLAB_QUARANTINE_RANDOM_SIZE=$(CONFIG_SLAB_QUARANTINE_RANDOM_SIZE) \
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-DSLAB_QUARANTINE_QUEUE_SIZE=$(CONFIG_SLAB_QUARANTINE_QUEUE_SIZE) \
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-DGUARD_SLABS_INTERVAL=$(CONFIG_GUARD_SLABS_INTERVAL) \
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-DGUARD_SIZE_DIVISOR=$(CONFIG_GUARD_SIZE_DIVISOR) \
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-DREGION_QUARANTINE_RANDOM_SIZE=$(CONFIG_REGION_QUARANTINE_RANDOM_SIZE) \
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-DREGION_QUARANTINE_QUEUE_SIZE=$(CONFIG_REGION_QUARANTINE_QUEUE_SIZE) \
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-DREGION_QUARANTINE_SKIP_THRESHOLD=$(CONFIG_REGION_QUARANTINE_SKIP_THRESHOLD) \
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-DFREE_SLABS_QUARANTINE_RANDOM_SIZE=$(CONFIG_FREE_SLABS_QUARANTINE_RANDOM_SIZE)
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hardened_malloc.so: $(OBJECTS)
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$(CC) $(CFLAGS) $(LDFLAGS) -shared $^ $(LDLIBS) -o $@
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chacha.o: chacha.c chacha.h util.h
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malloc.o: malloc.c malloc.h config.h mutex.h memory.h pages.h random.h util.h
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malloc.o: malloc.c malloc.h mutex.h memory.h pages.h random.h util.h
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memory.o: memory.c memory.h util.h
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new.o: new.cc malloc.h util.h
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pages.o: pages.c pages.h memory.h util.h
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23
README.md
23
README.md
@ -102,20 +102,17 @@ options are available:
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contained within an isolated memory region with high entropy random guard
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regions around it.
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More advanced compile-time configuration is available in the `config.h` file
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and will be migrated to the main configuration when proper sanity checks and
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documentation are written. The following advanced options are available:
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The following are more advanced configuration options without proper sanity
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checks and documentation written yet, so use them at your own peril:
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```
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#define SLAB_QUARANTINE_RANDOM_SIZE 0
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#define SLAB_QUARANTINE_QUEUE_SIZE 0
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#define GUARD_SLABS_INTERVAL 1
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#define GUARD_SIZE_DIVISOR 2
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#define REGION_QUARANTINE_RANDOM_SIZE 128
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#define REGION_QUARANTINE_QUEUE_SIZE 1024
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#define REGION_QUARANTINE_SKIP_THRESHOLD (32 * 1024 * 1024)
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#define FREE_SLABS_QUARANTINE_RANDOM_SIZE 32
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```
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* `CONFIG_SLAB_QUARANTINE_RANDOM_SIZE`: `0` (default)
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* `CONFIG_SLAB_QUARANTINE_QUEUE_SIZE`: `0` (default)
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* `CONFIG_GUARD_SLABS_INTERVAL`: `1` (default)
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* `CONFIG_GUARD_SIZE_DIVISOR`: `2` (default)
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* `CONFIG_REGION_QUARANTINE_RANDOM_SIZE`: `128` (default)
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* `CONFIG_REGION_QUARANTINE_QUEUE_SIZE`: `1024` (default)
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* `CONFIG_REGION_QUARANTINE_SKIP_THRESHOLD`: `33554432` (default)
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* `CONFIG_FREE_SLABS_QUARANTINE_RANDOM_SIZE`: `32` (default)
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There will be more control over enabled features in the future along with
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control over fairly arbitrarily chosen values like the size of empty slab
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15
config.h
15
config.h
@ -1,15 +0,0 @@
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#ifndef CONFIG_H
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#define CONFIG_H
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#include <stdbool.h>
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#define SLAB_QUARANTINE_RANDOM_SIZE 0
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#define SLAB_QUARANTINE_QUEUE_SIZE 0
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#define GUARD_SLABS_INTERVAL 1
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#define GUARD_SIZE_DIVISOR 2
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#define REGION_QUARANTINE_RANDOM_SIZE 128
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#define REGION_QUARANTINE_QUEUE_SIZE 1024
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#define REGION_QUARANTINE_SKIP_THRESHOLD (32 * 1024 * 1024)
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#define FREE_SLABS_QUARANTINE_RANDOM_SIZE 32
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#endif
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1
malloc.c
1
malloc.c
@ -11,7 +11,6 @@
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#include "third_party/libdivide.h"
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#include "config.h"
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#include "malloc.h"
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#include "mutex.h"
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#include "memory.h"
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@ -1,3 +1,12 @@
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CONFIG_SLAB_CANARY := true
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ifeq (,$(filter $(CONFIG_SLAB_CANARY),true false))
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$(error CONFIG_SLAB_CANARY must be true or false)
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endif
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CPPFLAGS += \
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-DSLAB_CANARY=$(CONFIG_SLAB_CANARY)
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EXECUTABLES := \
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offset
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@ -1,9 +1,8 @@
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "../config.h"
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static unsigned size_classes[] = {
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/* large */ 4 * 1024 * 1024,
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/* 0 */ 0,
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