source: trunk/kernel/kern/cpu-trace.h @ 1

Last change on this file since 1 was 1, checked in by alain, 5 years ago

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1/*
2 * kern/cpu-trace.h - Per-CPU, In-core trace system
3 *
4 * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless
5 * Copyright (c) 2011,2012 UPMC Sorbonne Universites
6 *
7 * This file is part of ALMOS-kernel.
8 *
9 * ALMOS-kernel is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2.0 of the License.
12 *
13 * ALMOS-kernel is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#ifndef _CPU_TRACE_H_
24#define _CPU_TRACE_H_
25
26#include <config.h>
27#include <types.h>
28#include <kdmsg.h>
29
30/** Opaque CPU trace recorder */
31struct cpu_trace_recorder_s;
32
33/** Write CPU trace information to current CPU recorder */
34#define cpu_trace_write(_cpu,func)
35
36/** Dump CPU trace log to specified tty */
37static inline void cpu_trace_dump(struct cpu_s *cpu);
38
39
40///////////////////////////////////////////////////////////////////////
41//                         Private Section                           //
42///////////////////////////////////////////////////////////////////////
43
44#define CPU_TRACE_LOG_LENGTH      100
45
46/** Private trace info structure */
47typedef struct cpu_trace_info_s
48{
49        uint_t time_stamp;
50        void *func_addr;
51        uint_t stack_ptr;
52        void *thread_ptr;
53        uint_t line;
54}cpu_trace_info_t;
55
56/** Opaque CPU trace recorder */
57struct cpu_trace_recorder_s
58{
59        uint_t current_index;
60        cpu_trace_info_t log[CPU_TRACE_LOG_LENGTH];
61};
62
63
64#if CONFIG_CPU_TRACE
65#undef  cpu_trace_write
66#define cpu_trace_write(_cpu,func)                                      \
67        do{{                                                            \
68                        uint_t state;                                   \
69                        cpu_disable_all_irq(&state);                    \
70                        cpu_trace_info_t *info = &(_cpu)->trace_recorder->log[(_cpu)->trace_recorder->current_index]; \
71                        info->time_stamp = cpu_time_stamp();            \
72                        info->func_addr  = (func);                      \
73                        info->stack_ptr  = cpu_get_stack();             \
74                        info->thread_ptr = cpu_get_current_thread();    \
75                        (_cpu)->trace_recorder->current_index = ((_cpu)->trace_recorder->current_index  + 1) % CPU_TRACE_LOG_LENGTH; \
76                        cpu_restore_irq(state);                         \
77                }}while(0)
78
79static inline void cpu_trace_dump(struct cpu_s *cpu)
80{
81        register uint_t i;
82        register cpu_trace_info_t *info;
83 
84        except_dmsg("------------------------------------------\n");
85        except_dmsg("TRACE DUMP FOR CPU %d\n", cpu->gid);
86
87        for(i=0; i < CPU_TRACE_LOG_LENGTH; i++)
88        {
89                info = &cpu->trace_recorder->log[i];
90                except_dmsg("Entry %d\n", i);
91                except_dmsg("\tTimeStamp %d\n\tFunction: %x\n\tLine %d\n\tStack %x\n\tThread %x\n",
92                            info->time_stamp, info->func_addr, info->line, info->stack_ptr, info->thread_ptr);
93        }
94        except_dmsg("---> Current_index: %d\n", cpu->trace_recorder->current_index);
95}
96
97#else
98
99#define cpu_trace_write(_cpu,func)
100
101static inline void cpu_trace_dump(struct cpu_s *cpu)
102{
103        /* Nothing to do */
104}
105
106#endif  /* CONFIG_CPU_TRACE */
107
108#endif  /* _CPU_TRACE_H_ */
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