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debug messages: implement dynamic debug

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Heavily inspired off linux kernel's dynamic debug:
 * add a /sys/kernel/debug/dynamic_debug/control file
 (accessible from linux side in /sys/class/mcos/mcos0/sys/kernel/debug/dynamic_debug/control)
 * read from file to list debug statements (currently limited to 4k in size)
 * write to file with '[file foo ][func bar ][line [x][-[y]]] [+-]p' to change values

Side effects:
 * reindented all linker scripts, there is a new __verbose section
 * added string function strpbrk

Change-Id: I36d7707274dcc3ecaf200075a31a2f0f76021059
This commit is contained in:
Dominique Martinet
2018-05-24 18:17:45 +09:00
parent bc887aab44
commit 3185334c1c
48 changed files with 407 additions and 232 deletions
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40
kernel/include/debug.h Normal file
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@@ -0,0 +1,40 @@
#ifndef DEBUG_H
#define DEBUG_H
#include <lwk/compiler.h>
struct ddebug {
const char *file;
const char *func;
const char *fmt;
unsigned int line:24;
unsigned int flags:8;
} __aligned(8);
#define DDEBUG_NONE 0x0
#define DDEBUG_PRINT 0x1
#define DDEBUG_DEFAULT DDEBUG_NONE
#define DDEBUG_SYMBOL() \
static struct ddebug __aligned(8) \
__attribute__((section("__verbose"))) ddebug = { \
.file = __FILE__, \
.func = __func__, \
.line = __LINE__, \
.flags = DDEBUG_DEFAULT, \
}
#define DDEBUG_TEST ddebug.flags
#define dkprintf(fmt, args...) \
do { \
DDEBUG_SYMBOL(); \
if (DDEBUG_TEST) \
kprintf(fmt, ##args); \
} while (0)
#define ekprintf(fmt, args...) kprintf(fmt, ##args)
#endif

1
kernel/include/init.h
View File

@@ -33,6 +33,7 @@ extern void cpu_sysfs_setup(void);
extern void numa_sysfs_setup(void);
extern void rusage_sysfs_setup(void);
extern void status_sysfs_setup(void);
extern void dynamic_debug_sysfs_setup(void);
extern char *find_command_line(char *name);

11
kernel/include/xpmem_private.h
View File

@@ -26,20 +26,17 @@
#include <mc_xpmem.h>
#include <xpmem.h>
#include <debug.h>
#define XPMEM_CURRENT_VERSION 0x00026003
//#define DEBUG_PRINT_XPMEM
#ifdef DEBUG_PRINT_XPMEM
#define dkprintf(...) kprintf(__VA_ARGS__)
#define ekprintf(...) kprintf(__VA_ARGS__)
#define XPMEM_DEBUG(format, a...) kprintf("[%d] %s: "format"\n", cpu_local_var(current)->proc->rgid, __func__, ##a)
#else
#define dkprintf(...) do { if (0) kprintf(__VA_ARGS__); } while (0)
#define ekprintf(...) kprintf(__VA_ARGS__)
#define XPMEM_DEBUG(format, a...) do { if (0) kprintf("\n"); } while (0)
#undef DDEBUG_DEFAULT
#define DDEBUG_DEFAULT DDEBUG_PRINT
#endif
#define XPMEM_DEBUG(format, a...) dkprintf("[%d] %s: "format"\n", cpu_local_var(current)->proc->rgid, __func__, ##a)
//#define USE_DBUG_ON