mmap_cache: add function to enable mmap_cache

[strace] / defs.h

diff --git a/defs.h b/defs.h
index 97bdcd805bcc526d67da4c7c0a592c2a7bd11c04..afcefcd8229bd82e9a713311f844cbdf7d49995b 100644 (file)
--- a/defs.h
+++ b/defs.h
@@ -733,20 +733,31 @@ struct mmap_cache_t {
         * start_addr  is 0x7fabbb09b000
         * end_addr    is 0x7fabbb09f000
         * mmap_offset is 0x179000
+        * protections is MMAP_CACHE_PROT_READABLE|MMAP_CACHE_PROT_EXECUTABLE
         * binary_filename is "/lib/libc-2.11.1.so"
         */
        unsigned long start_addr;
        unsigned long end_addr;
        unsigned long mmap_offset;
+       unsigned char protections;
        char *binary_filename;
 };
 
+enum mmap_cache_protection {
+       MMAP_CACHE_PROT_READABLE   = 1 << 0,
+       MMAP_CACHE_PROT_WRITABLE   = 1 << 1,
+       MMAP_CACHE_PROT_EXECUTABLE = 1 << 2,
+       MMAP_CACHE_PROT_SHARED     = 1 << 3,
+};
+
 enum mmap_cache_rebuild_result {
        MMAP_CACHE_REBUILD_NOCACHE,
        MMAP_CACHE_REBUILD_READY,
        MMAP_CACHE_REBUILD_RENEWED,
 };
 
+extern void mmap_cache_enable(void);
+extern bool mmap_cache_is_enabled(void);
 extern void mmap_cache_invalidate(struct tcb *tcp);
 extern void mmap_cache_delete(struct tcb *tcp, const char *caller);
 extern enum mmap_cache_rebuild_result mmap_cache_rebuild_if_invalid(struct tcb *tcp, const char *caller);