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| author | David Carlier <devnexen@gmail.com> | 2022-04-15 17:34:19 +0100 |
|---|---|---|
| committer | David Carlier <devnexen@gmail.com> | 2022-04-15 17:34:19 +0100 |
| commit | 6e790552fe7a1f34e584160ceef051b6f66b7ce4 (patch) | |
| tree | 11777a725d854e372ac7eac8e95140ca91c991c8 /utils/libdislocator/libdislocator.so.c | |
| parent | 5d4b0938d5c3ddad18c85c1f2a4c516d46bbf243 (diff) | |
| download | afl++-6e790552fe7a1f34e584160ceef051b6f66b7ce4.tar.gz | |
libdislocator, new option to name an anonymous address range.
For performance matter tough, disabled by default.
Diffstat (limited to 'utils/libdislocator/libdislocator.so.c')
| -rw-r--r-- | utils/libdislocator/libdislocator.so.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/utils/libdislocator/libdislocator.so.c b/utils/libdislocator/libdislocator.so.c index 103da9d5..72fafa4b 100644 --- a/utils/libdislocator/libdislocator.so.c +++ b/utils/libdislocator/libdislocator.so.c @@ -39,6 +39,7 @@ #if (defined(__linux__) && !defined(__ANDROID__)) || defined(__HAIKU__) #include <unistd.h> + #include <sys/prctl.h> #ifdef __linux__ #include <sys/syscall.h> #include <malloc.h> @@ -66,6 +67,10 @@ } while (0) #endif + #ifndef PR_SET_VMA + #define PR_SET_VMA 0x53564d41 + #define PR_SET_VMA_ANON_NAME 0 + #endif #endif #include "config.h" @@ -251,6 +256,19 @@ static void *__dislocator_alloc(size_t len) { } +#if defined(USENAMEDPAGE) +#if defined(__linux__) + // in the /proc/<pid>/maps file, the anonymous page appears as + // `<start>-<end> ---p 00000000 00:00 0 [anon:libdislocator]` + if (prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, + (unsigned long)ret, tlen, (unsigned long)"libdislocator") < 0) { + + DEBUGF("prctl() failed"); + + } +#endif +#endif + /* Set PROT_NONE on the last page. */ if (mprotect(ret + PG_COUNT(rlen + 8) * PAGE_SIZE, PAGE_SIZE, PROT_NONE)) |