| 1 | /* |
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| 2 | * sys_trace.c - show kernel active processes and threads |
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| 3 | * |
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| 4 | * Author Alain Greiner (c) (2016,2017) |
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| 5 | * |
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| 6 | * Copyright (c) UPMC Sorbonne Universites |
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| 7 | * |
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| 8 | * This file is part of ALMOS-MKH. |
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| 9 | * |
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| 10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 11 | * under the terms of the GNU General Public License as published by |
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| 12 | * the Free Software Foundation; version 2.0 of the License. |
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| 13 | * |
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| 14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 17 | * General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 22 | */ |
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| 23 | |
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| 24 | #include <hal_types.h> |
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| 25 | #include <hal_special.h> |
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| 26 | #include <printk.h> |
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| 27 | #include <thread.h> |
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| 28 | #include <errno.h> |
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| 29 | #include <syscalls.h> |
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| 30 | |
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| 31 | ////////////////////////////////// |
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| 32 | int sys_trace( uint32_t operation, |
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| 33 | pid_t pid, |
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| 34 | uint32_t trdid ) |
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| 35 | { |
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| 36 | // get extended pointer on target thread |
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| 37 | xptr_t thread_xp = thread_get_xptr( pid , trdid ); |
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| 38 | |
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| 39 | if( thread_xp == XPTR_NULL ) |
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| 40 | { |
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| 41 | printk("\n[ERROR] in %s : undefined thread for PID = %x / TRDID = %x\n", |
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| 42 | __FUNCTION__ , pid , trdid ); |
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| 43 | CURRENT_THREAD->errno = EINVAL; |
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| 44 | return -1; |
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| 45 | } |
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| 46 | |
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| 47 | if( operation == TRACE_OFF ) |
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| 48 | { |
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| 49 | // desactivate thread trace TODO |
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| 50 | |
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| 51 | printk("\n[DBG] %s : trace OFF for thread %x in process %x\n", |
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| 52 | __FUNCTION__ , trdid , pid ); |
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| 53 | } |
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| 54 | else if( operation == TRACE_ON ) |
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| 55 | { |
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| 56 | // activate thread trace TODO |
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| 57 | |
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| 58 | printk("\n[DBG] %s : trace ON for thread %x in process %x\n", |
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| 59 | __FUNCTION__ , trdid , pid ); |
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| 60 | } |
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| 61 | else |
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| 62 | { |
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| 63 | printk("\n[ERROR] in %s : undefined operation\n", __FUNCTION__ ); |
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| 64 | CURRENT_THREAD->errno = EINVAL; |
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| 65 | return -1; |
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| 66 | } |
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| 67 | |
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| 68 | hal_fence(); |
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| 69 | |
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| 70 | return 0; |
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| 71 | |
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| 72 | } // end sys_trace() |
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