system_cmds-643.30.1.tar.gz

[apple/system_cmds.git] / msa / Globals.cpp

diff --git a/msa/Globals.cpp b/msa/Globals.cpp
new file mode 100644 (file)
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+++ b/msa/Globals.cpp
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+//
+//  MachineGlobals.cpp
+//  msa
+//
+//  Created by James McIlree on 4/17/13.
+//  Copyright (c) 2014 Apple. All rights reserved.
+//
+
+#include "global.h"
+
+Globals::Globals() :
+       _cpu_count(0),
+       _iop_count(0),
+       _kernel_size(Kernel::is_64_bit() ? KernelSize::k64 : KernelSize::k32),
+       _live_update_interval("100ms"),
+       _is_cpu_count_set(false),
+       _is_iop_count_set(false),
+       _is_kernel_size_set(false),
+       _is_timebase_set(false),
+       _beginning_of_time(0),
+       _should_print_mach_absolute_timestamps(false),
+       _should_print_event_index(false),
+       _is_verbose(false),
+       _should_presort_events(false),
+       _should_zero_base_timestamps(true),
+       _should_trace_voucher_contents(true),
+       _lifecycle_filter(kLifecycleFilter::User),
+       _mach_msg_filter(kMachMsgFilter::Voucher)
+{
+       // Default to the current machine's values
+       mach_timebase_info(&_timebase_info);
+
+       for (auto& entry : KDBG::cpumap()) {
+               if (entry.is_iop())
+                       _iop_count++;
+               else
+                       _cpu_count++;
+       }
+
+       // If we are unable to get a cpumap,
+       // fallback on the current # of cpus
+       if (_cpu_count == 0) {
+               _cpu_count = Kernel::active_cpu_count();
+               _iop_count = 0;
+       }
+
+       // This is only used as is for live tracing or capturing a trace,
+       // so we want to use the current # of cpus.
+       _trace_buffer_size = 250000 * _cpu_count;
+}
+
+static AbsTime parse_time(const char* arg, mach_timebase_info_data_t timebase_info) {
+
+       char* units;
+       uint64_t value = strtoull(arg, &units, 0);
+
+       // Unspecified units are treated as seconds
+       if (*units == 0 || strcmp(units, "s") == 0) {
+               return NanoTime(value * NANOSECONDS_PER_SECOND).abs_time(timebase_info);
+       }
+
+       if (strcmp(units, "ms") == 0)
+               return NanoTime(value * NANOSECONDS_PER_MILLISECOND).abs_time(timebase_info);
+
+       if (strcmp(units, "us") == 0)
+               return NanoTime(value * NANOSECONDS_PER_MICROSECOND).abs_time(timebase_info);
+
+       if (strcmp(units, "ns") == 0)
+               return NanoTime(value).abs_time(timebase_info);
+
+       if (strcmp(units, "mabs") == 0) {
+               return AbsTime(value);
+       }
+
+       usage("Unable to parse units on time value");
+}
+
+AbsTime Globals::live_update_interval() const {
+       return parse_time(_live_update_interval.c_str(), _timebase_info);
+}