diff options
Diffstat (limited to 'src/common/host_memory.cpp')
| -rw-r--r-- | src/common/host_memory.cpp | 79 |
1 files changed, 67 insertions, 12 deletions
diff --git a/src/common/host_memory.cpp b/src/common/host_memory.cpp index e0b5a6a67c..9e34cd3ac6 100644 --- a/src/common/host_memory.cpp +++ b/src/common/host_memory.cpp @@ -1,3 +1,6 @@ +// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project +// SPDX-License-Identifier: GPL-3.0-or-later + // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project // SPDX-License-Identifier: GPL-2.0-or-later @@ -9,7 +12,7 @@ #include <windows.h> #include "common/dynamic_library.h" -#elif defined(__linux__) || defined(__FreeBSD__) // ^^^ Windows ^^^ vvv Linux vvv +#elif defined(__linux__) || defined(__FreeBSD__) || defined(__sun__) // ^^^ Windows ^^^ vvv Linux vvv #ifndef _GNU_SOURCE #define _GNU_SOURCE @@ -21,9 +24,14 @@ #include <unistd.h> #include "common/scope_exit.h" +// FreeBSD #ifndef MAP_NORESERVE #define MAP_NORESERVE 0 #endif +// Solaris 11 and illumos +#ifndef MAP_ALIGNED_SUPER +#define MAP_ALIGNED_SUPER 0 +#endif #endif // ^^^ Linux ^^^ @@ -364,7 +372,7 @@ private: std::unordered_map<size_t, size_t> placeholder_host_pointers; ///< Placeholder backing offset }; -#elif defined(__linux__) || defined(__FreeBSD__) // ^^^ Windows ^^^ vvv Linux vvv +#elif defined(__linux__) || defined(__FreeBSD__) || defined(__sun__) // ^^^ Windows ^^^ vvv Linux vvv #ifdef ARCHITECTURE_arm64 @@ -409,22 +417,65 @@ static void* ChooseVirtualBase(size_t virtual_size) { #else static void* ChooseVirtualBase(size_t virtual_size) { -#if defined(__FreeBSD__) - void* virtual_base = - mmap(nullptr, virtual_size, PROT_READ | PROT_WRITE, - MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE | MAP_ALIGNED_SUPER, -1, 0); - - if (virtual_base != MAP_FAILED) { + void* virtual_base = mmap(nullptr, virtual_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE | MAP_ALIGNED_SUPER, -1, 0); + if (virtual_base != MAP_FAILED) return virtual_base; - } -#endif - return mmap(nullptr, virtual_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0); } #endif +#if defined(__sun__) || defined(__HAIKU__) || defined(__NetBSD__) || defined(__DragonFly__) +/// Most Unices don't have a portable shm_open (AIX, OpenBSD, NetBSD, Solaris 11, OpenIndiana) +/// Portable implementation of shm_open(SHM_ANON, ...) - roughly equivalent but without +/// OS support - may fail sporadically, beware! +static int shm_open_anon(int flags, mode_t mode) { + char name[16] = "/shm-"; + char *const limit = name + sizeof(name) - 1; + *limit = '\0'; + char *start = name + strlen(name); + for (int tries = 0; tries < 4; tries++) { + struct timespec tv; + clock_gettime(CLOCK_REALTIME, &tv); + unsigned long r = (unsigned long)tv.tv_sec + (unsigned long)tv.tv_nsec; + for (char *fill = start; fill < limit; r /= 8) + *fill++ = '0' + (r % 8); + int fd = shm_open(name, flags, mode); + if (fd != -1) + return ([](const char *name, int fd) { + if (shm_unlink(name) == -1) { + int tmp = errno; + close(fd); + errno = tmp; + return -1; + } + return fd; + })(name, fd); + if (errno != EEXIST) + break; + } + return -1; +} +#elif defined(__OpenBSD__) +/// Except OpenBSD which explicitly uses shm_mkstemp instead (as a more secure alternative) +static int shm_open_anon(int flags, mode_t mode) { + char name[16] = "/shm-XXXXXXXXXX"; + int fd; + if ((fd = shm_mkstemp(name)) == -1) + return -1; + return ([](const char *name, int fd) { + if (shm_unlink(name) == -1) { + int tmp = errno; + close(fd); + errno = tmp; + return -1; + } + return fd; + })(name, fd); +} +#endif + class HostMemory::Impl { public: explicit Impl(size_t backing_size_, size_t virtual_size_) @@ -443,7 +494,11 @@ public: } // Backing memory initialization -#if defined(__FreeBSD__) && __FreeBSD__ < 13 +#if defined(__sun__) || defined(__HAIKU__) || defined(__NetBSD__) || defined(__DragonFly__) + fd = shm_open_anon(O_RDWR | O_CREAT | O_EXCL | O_NOFOLLOW, 0600); +#elif defined(__OpenBSD__) + fd = shm_open_anon(O_RDWR | O_CREAT | O_EXCL | O_NOFOLLOW, 0600); +#elif defined(__FreeBSD__) && __FreeBSD__ < 13 // XXX Drop after FreeBSD 12.* reaches EOL on 2024-06-30 fd = shm_open(SHM_ANON, O_RDWR, 0600); #else |