diff options
Diffstat (limited to 'executor/shmem.h')
| -rw-r--r-- | executor/shmem.h | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/executor/shmem.h b/executor/shmem.h index ab9d17300..b7722ff99 100644 --- a/executor/shmem.h +++ b/executor/shmem.h @@ -3,6 +3,7 @@ #include <fcntl.h> #include <stddef.h> +#include <stdlib.h> #include <sys/mman.h> #include <unistd.h> @@ -10,20 +11,22 @@ class ShmemFile { public: - // Maps shared memory region of size 'size' from a new file 'file', preferably at the address 'preferred'. - ShmemFile(const char* file, void* preferred, size_t size) + // Maps shared memory region of size 'size' from a new temp file. + ShmemFile(size_t size) { - fd_ = open(file, O_RDWR | O_CREAT | O_TRUNC, 0600); + char file_name[] = "syz.XXXXXX"; + fd_ = mkstemp(file_name); if (fd_ == -1) - failmsg("shmem open failed", "file=%s", file); - if (fallocate(fd_, 0, 0, size)) + failmsg("shmem open failed", "file=%s", file_name); + if (posix_fallocate(fd_, 0, size)) failmsg("shmem fallocate failed", "size=%zu", size); - Mmap(fd_, preferred, size, true); - if (unlink(file)) + Mmap(fd_, nullptr, size, true); + if (unlink(file_name)) fail("shmem unlink failed"); } - // Maps shared memory region from the file 'fd' in read/write or write-only mode. + // Maps shared memory region from the file 'fd' in read/write or write-only mode, + // preferably at the address 'preferred'. ShmemFile(int fd, void* preferred, size_t size, bool write) { Mmap(fd, preferred, size, write); |