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author | Cameron Katri <me@cameronkatri.com> | 2021-05-09 14:20:58 -0400 |
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committer | Cameron Katri <me@cameronkatri.com> | 2021-05-09 14:20:58 -0400 |
commit | 5fd83771641d15c418f747bd343ba6738d3875f7 (patch) | |
tree | 5abf0f78f680d9837dbd93d4d4c3933bb7509599 /system_cmds/mslutil | |
download | apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.gz apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.zst apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.zip |
Import macOS userland
adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106
Diffstat (limited to 'system_cmds/mslutil')
-rw-r--r-- | system_cmds/mslutil/mslutil.1 | 46 | ||||
-rw-r--r-- | system_cmds/mslutil/mslutil.c | 96 |
2 files changed, 142 insertions, 0 deletions
diff --git a/system_cmds/mslutil/mslutil.1 b/system_cmds/mslutil/mslutil.1 new file mode 100644 index 0000000..ea4f068 --- /dev/null +++ b/system_cmds/mslutil/mslutil.1 @@ -0,0 +1,46 @@ +.\" Copyright (c) 2017, Apple Computer, Inc. All rights reserved. +.\" +.Dd March 31, 2017 +.Dt MSLUTIL 1 +.Os "Mac OS X" +.Sh NAME +.Nm mslutil +.Nd Tool to enable / disable malloc stack logging on a specific proces +.Sh SYNOPSIS +.Nm mslutil pid [--enable flavor] | [--disable] +.Sh DESCRIPTION +The +.Nm mslutil +utility enables/disables malloc stack logging on the process specified by +.Nm pid. +It requires root privileges. +.Pp +The options are as follows: +.Bl -tag -width Ds +.\" ========== +.It Fl -enable +Specifying the +.Fl -enable +option enables malloc stack logging, using the +.Pa flavor +provided. +The supported flavors are: +.Pp +.Pa full +Standard malloc stack logging that records both vm and malloc calls +.Pp +.Pa malloc +Standard malloc stack logging that records only malloc calls +.Pp +.Pa vm +Standard malloc stack logging that records only vm calls +.Pp +.Pa lite +Lite mode of malloc stack logging. +.\" ========== +.It Fl -disable +Specifying the +.Fl -disable +option disables any current mode of malloc stack logging. +.\" ========== +.El diff --git a/system_cmds/mslutil/mslutil.c b/system_cmds/mslutil/mslutil.c new file mode 100644 index 0000000..5738d4a --- /dev/null +++ b/system_cmds/mslutil/mslutil.c @@ -0,0 +1,96 @@ +// +// mslutil.c +// mslutil +// +// Created by Christopher Deppe on 3/31/17. +// + +#include <stdio.h> +#include <stdlib.h> +#include <errno.h> +#include <string.h> +#include <sys/sysctl.h> +#include <stack_logging.h> + +#define BSD_PID_MAX 99999 /* Copy of PID_MAX from sys/proc_internal.h. */ + +static void print_usage() +{ + printf("usage: mslutil pid [--disable] | [--enable malloc | vm | full | lite | vmlite]\n"); +} + +static int send_msl_command(uint64_t pid, uint64_t flavor) +{ + uint64_t flags = flavor; + flags <<= 32; + + flags |= (pid & 0xFFFFFFFF); + + int ret = sysctlbyname("kern.memorystatus_vm_pressure_send", 0, 0, &flags, sizeof(flags)); + + if (ret) { + printf("send_msl_command - sysctl: kern.memorystatus_vm_pressure_send failed %s\n", strerror(errno)); + } else { + printf("send_msl_command - success!\n"); + } + + return ret; +} + +int main(int argc, const char * argv[]) +{ + if (argc < 3) { + print_usage(); + exit(1); + } + + int ret = -1; + + pid_t pid = atoi(argv[1]); + + if (pid <= 0 || pid > BSD_PID_MAX) { + printf("Invalid pid\n"); + exit(1); + } + + if (strcmp(argv[2], "--enable") == 0) { + if (argc < 4) { + print_usage(); + exit(1); + } + + uint64_t flavor = 0; + + if (strcmp(argv[3], "full") == 0) { + flavor = MEMORYSTATUS_ENABLE_MSL_MALLOC | MEMORYSTATUS_ENABLE_MSL_VM; + } else if (strcmp(argv[3], "malloc") == 0) { + flavor = MEMORYSTATUS_ENABLE_MSL_MALLOC; + } else if (strcmp(argv[3], "vm") == 0) { + flavor = MEMORYSTATUS_ENABLE_MSL_VM; + } else if (strcmp(argv[3], "lite") == 0) { + flavor = MEMORYSTATUS_ENABLE_MSL_LITE_FULL; + } else if (strcmp(argv[3], "vmlite") == 0) { + flavor = MEMORYSTATUS_ENABLE_MSL_LITE_VM; + } + + if (flavor == 0) { + print_usage(); + exit(1); + } + + ret = send_msl_command(pid, flavor); + } else if (strcmp(argv[2], "--disable") == 0) { + ret = send_msl_command(pid, MEMORYSTATUS_DISABLE_MSL); + } else { + print_usage(); + exit(1); + } + + if (ret != 0) { + exit(1); + } else { + exit(0); + } +} + + |