1 files changed, 63 insertions, 0 deletions
diff --git a/src/detection/cpucache/cpucache_apple.c b/src/detection/cpucache/cpucache_apple.c
new file mode 100644
index 0000000..3d1562c
--- /dev/null
+++ b/src/detection/cpucache/cpucache_apple.c
@@ -0,0 +1,63 @@
+#include "cpucache.h"
+#include "common/sysctl.h"
+#include "common/strutil.h"
+
+const char* ffDetectCPUCache(FFCPUCacheResult* result) {
+    // https://developer.apple.com/documentation/kernel/1387446-sysctlbyname/determining_system_capabilities#3901385
+    uint32_t nPerfLevels = (uint32_t) ffSysctlGetInt("hw.nperflevels", 0);
+    if (nPerfLevels <= 0) {
+        return "sysctl(hw.nperflevels) failed";
+    }
+
+    // macOS provides the global system cache line size
+    uint32_t lineSize = (uint32_t) ffSysctlGetInt64("hw.cachelinesize", 0);
+
+    char sysctlKey[128] = "hw.perflevelN.";
+    char* pNum = sysctlKey + strlen("hw.perflevel");
+    char* pSubkey = sysctlKey + strlen("hw.perflevelN.");
+    const size_t lenLeft = ARRAY_SIZE(sysctlKey) - strlen("hw.perflevelN.");
+
+    for (uint32_t i = 0; i < nPerfLevels; ++i) {
+        *pNum = (char) ('0' + i);
+
+        ffStrCopy(pSubkey, "physicalcpu", lenLeft);
+        uint32_t ncpu = (uint32_t) ffSysctlGetInt(sysctlKey, 0);
+        if (ncpu <= 0) {
+            continue;
+        }
+
+        ffStrCopy(pSubkey, "l1icachesize", lenLeft);
+        uint32_t size = (uint32_t) ffSysctlGetInt(sysctlKey, 0);
+        if (size) {
+            ffCPUCacheAddItem(result, 1, size, lineSize, FF_CPU_CACHE_TYPE_INSTRUCTION)->num = ncpu;
+        }
+
+        ffStrCopy(pSubkey, "l1dcachesize", lenLeft);
+        size = (uint32_t) ffSysctlGetInt(sysctlKey, 0);
+        if (size) {
+            ffCPUCacheAddItem(result, 1, size, lineSize, FF_CPU_CACHE_TYPE_DATA)->num = ncpu;
+        }
+
+        ffStrCopy(pSubkey, "l2cachesize", lenLeft);
+        size = (uint32_t) ffSysctlGetInt(sysctlKey, 0);
+        if (size) {
+            ffStrCopy(pSubkey, "cpusperl2", lenLeft);
+            uint32_t cpuSper = (uint32_t) ffSysctlGetInt(sysctlKey, 0);
+            if (cpuSper) {
+                ffCPUCacheAddItem(result, 2, size, lineSize, FF_CPU_CACHE_TYPE_UNIFIED)->num = ncpu / cpuSper;
+            }
+        }
+
+        ffStrCopy(pSubkey, "l3cachesize", lenLeft);
+        size = (uint32_t) ffSysctlGetInt(sysctlKey, 0);
+        if (size) {
+            ffStrCopy(pSubkey, "cpusperl3", lenLeft);
+            uint32_t cpuSper = (uint32_t) ffSysctlGetInt(sysctlKey, 0);
+            if (cpuSper) {
+                ffCPUCacheAddItem(result, 3, size, lineSize, FF_CPU_CACHE_TYPE_UNIFIED)->num = ncpu / cpuSper;
+            }
+        }
+    }
+
+    return NULL;
+}