85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
// Copyright 2024 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build darwin && cgo
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#include <mach/mach_init.h>
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#include <mach/task.h>
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#include <mach/mach_vm.h>
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// The compiler warns that mach/shared_memory_server.h is deprecated, and to use
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// mach/shared_region.h instead. But that doesn't define
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// SHARED_DATA_REGION_SIZE or SHARED_TEXT_REGION_SIZE, so redefine them here and
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// avoid a warning message when running tests.
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#define GLOBAL_SHARED_TEXT_SEGMENT 0x90000000U
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#define SHARED_DATA_REGION_SIZE 0x10000000
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#define SHARED_TEXT_REGION_SIZE 0x10000000
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int get_memory_info(unsigned long long *rss, unsigned long long *vsize)
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{
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// This is lightly adapted from how ps(1) obtains its memory info.
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// https://github.com/apple-oss-distributions/adv_cmds/blob/8744084ea0ff41ca4bb96b0f9c22407d0e48e9b7/ps/tasks.c#L109
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kern_return_t error;
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task_t task = MACH_PORT_NULL;
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mach_task_basic_info_data_t info;
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mach_msg_type_number_t info_count = MACH_TASK_BASIC_INFO_COUNT;
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error = task_info(
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mach_task_self(),
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MACH_TASK_BASIC_INFO,
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(task_info_t) &info,
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&info_count );
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if( error != KERN_SUCCESS )
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{
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return error;
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}
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*rss = info.resident_size;
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*vsize = info.virtual_size;
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{
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vm_region_basic_info_data_64_t b_info;
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mach_vm_address_t address = GLOBAL_SHARED_TEXT_SEGMENT;
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mach_vm_size_t size;
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mach_port_t object_name;
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/*
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* try to determine if this task has the split libraries
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* mapped in... if so, adjust its virtual size down by
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* the 2 segments that are used for split libraries
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*/
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info_count = VM_REGION_BASIC_INFO_COUNT_64;
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error = mach_vm_region(
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mach_task_self(),
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&address,
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&size,
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VM_REGION_BASIC_INFO_64,
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(vm_region_info_t) &b_info,
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&info_count,
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&object_name);
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if (error == KERN_SUCCESS) {
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if (b_info.reserved && size == (SHARED_TEXT_REGION_SIZE) &&
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*vsize > (SHARED_TEXT_REGION_SIZE + SHARED_DATA_REGION_SIZE)) {
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*vsize -= (SHARED_TEXT_REGION_SIZE + SHARED_DATA_REGION_SIZE);
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}
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}
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}
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return 0;
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}
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