system_cmds-643.30.1.tar.gz

[apple/system_cmds.git] / KDBG / Kernel.cpp

diff --git a/KDBG/Kernel.cpp b/KDBG/Kernel.cpp
new file mode 100644 (file)
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--- /dev/null
+++ b/KDBG/Kernel.cpp
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+//
+//  Kernel.cpp
+//  KDBG
+//
+//  Created by James McIlree on 4/17/13.
+//  Copyright (c) 2014 Apple. All rights reserved.
+//
+
+#include "KDebug.h"
+
+using namespace util;
+
+bool Kernel::is_64_bit()
+{
+       int mib[4];
+       size_t len;
+       struct kinfo_proc kp;
+
+       /* Now determine if the kernel is running in 64-bit mode */
+       mib[0] = CTL_KERN;
+       mib[1] = KERN_PROC;
+       mib[2] = KERN_PROC_PID;
+       mib[3] = 0; /* kernproc, pid 0 */
+       len = sizeof(kp);
+       if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &kp, &len, NULL, 0) == -1) {
+               THROW("sysctl to get kernel size failed");
+       }
+
+       if (kp.kp_proc.p_flag & P_LP64)
+               return true;
+
+       return false;
+}
+
+uint32_t Kernel::active_cpu_count()
+{
+       int mib[4];
+       size_t len;
+       int     num_cpus;
+
+       /*
+        * grab the number of cpus and scale the buffer size
+        */
+       mib[0] = CTL_HW;
+       mib[1] = HW_NCPU;
+       mib[2] = 0;
+       len = sizeof(num_cpus);
+
+       sysctl(mib, 2, &num_cpus, &len, NULL, 0);
+
+       return num_cpus;
+}