Re: [Crash-utility] [PATCH] crash: Fix extend command on s390x
by Dave Anderson
----- "Michael Holzheu" <holzheu(a)linux.vnet.ibm.com> wrote:
> When loading an extension on s390x, we get the error "xxx.so not an ELF
> format object file". Looks like the problem is a missing check in
> is_shared_object().
>
> The following patch fixes the problem:
> ---
> diff -Naurp crash-4.0.9/symbols.c
> crash-4.0.9-fix-extend-s390x/symbols.c
> --- crash-4.0.9/symbols.c 2009-09-14 15:47:58.000000000 +0200
> +++ crash-4.0.9-fix-extend-s390x/symbols.c 2009-09-14
> 15:48:04.000000000 +0200
> @@ -2723,6 +2723,10 @@ is_shared_object(char *file)
> if (machine_type("X86_64"))
> return TRUE;
> break;
> + case EM_S390:
> + if (machine_type("S390X"))
> + return TRUE;
> + break;
> }
>
> if (CRASHDEBUG(1))
Mea culpa.
Queued for the next release.
Thanks,
Dave
14 years, 12 months
- 1
- 0
[PATCH] crash: Fix extend command on s390x
by Michael Holzheu
When loading an extension on s390x, we get the error "xxx.so not an ELF
format object file". Looks like the problem is a missing check in
is_shared_object().
The following patch fixes the problem:
---
diff -Naurp crash-4.0.9/symbols.c crash-4.0.9-fix-extend-s390x/symbols.c
--- crash-4.0.9/symbols.c 2009-09-14 15:47:58.000000000 +0200
+++ crash-4.0.9-fix-extend-s390x/symbols.c 2009-09-14 15:48:04.000000000 +0200
@@ -2723,6 +2723,10 @@ is_shared_object(char *file)
if (machine_type("X86_64"))
return TRUE;
break;
+ case EM_S390:
+ if (machine_type("S390X"))
+ return TRUE;
+ break;
}
if (CRASHDEBUG(1))
14 years, 12 months
- 1
- 0
Re: [ANNOUNCE][RFC] trace extension module for crash
by Dave Anderson
----- "Lai Jiangshan" <laijs(a)cn.fujitsu.com> wrote:
> This extension module enables crash to analyze tracing from core-file
> and make tracing can act as a flight recorder. It helps us find
> what have happen from the sequence of events before panic.
> It makes the core-file is not just a system snapshot on panic time.
I have added the trace.c extension module to the extension module
web page:
http://people.redhat.com/anderson/extensions.html
Whenever you want to update the file, just let me know.
Thanks,
Dave
14 years, 12 months
- 1
- 0
[ANNOUNCE][RFC][PATCH] Crash-utility, tracing: enable crash to analyze tracing from core-file (make tracing can act as a flight recorder)
by Lai Jiangshan
We use tracing subsystem very well when kernel is alive.
But we also want to get help from tracing when kernel is core-dump.
This patch is for this purpose. It makes tracing can act as a
flight recorder, we can find what have happen from the events.
This patch is applied for crash-4.0-8.8.
It was tested for linux version 2.6.31-rc5-tip-00972-gd84b9d2 on i386.
The codes is not mature, comments are welcome.
And any request is welcome, it will be added to my plan.
Lai.
crash> help trace
NAME
trace - show or dump the tracing info
SYNOPSIS
trace [ <show [-c <cpulist>] [-f [no]<flagname>]> | <dump [-sm] <dest-dir>> ]
DESCRIPTION
trace
shows the current tracer and other informations.
trace show [ -c <cpulist> ] [ -f [no]<flagename> ]
shows all events with readability text(sorted by timestamp)
-c: only shows specified CPUs' events.
ex. trace show -c 1,2 - only shows cpu#1 and cpu#2 's events.
trace show -c 0,2-7 - only shows cpu#0, cpu#2...cpu#7's events.
-f: set or clear a flag
available flags default
context_info true
sym_offset false
sym_addr false
graph_print_duration true
graph_print_overhead true
graph_print_abstime false
graph_print_cpu true
graph_print_proc false
graph_print_overrun false
trace dump [-sm] <dest-dir>
dump ring_buffers to dest-dir. Then you can parse it
by other tracing tools. The dirs and files are generated
the same as debugfs/tracing.
-m: also dump metadata of ftrace.
-s: also dump symbols of the kernel <not implemented>.
EXAMPLE, dump ring_buffer:
crash > trace dump -m dumped_tracing
(quit crash)
# ls -R dumped_tracing
dumped_tracing:
events per_cpu saved_cmdlines
dumped_tracing/events:
block ftrace irq kmem sched skb workqueue
dumped_tracing/events/block:
block_bio_backmerge block_bio_frontmerge block_plug block_rq_complete block_rq_requeue block_unplug_io
block_bio_bounce block_bio_queue block_remap block_rq_insert block_sleeprq block_unplug_timer
block_bio_complete block_getrq block_rq_abort block_rq_issue block_split
dumped_tracing/events/block/block_bio_backmerge:
format
dumped_tracing/events/block/block_bio_bounce:
format
....
dumped_tracing/per_cpu:
cpu0 cpu1
dumped_tracing/per_cpu/cpu0:
trace_pipe_raw
dumped_tracing/per_cpu/cpu1:
trace_pipe_raw
EXAMPLE, shows function tracer
crash > trace show
<...>-3677 [001] 6094.628402: pick_next_task_fair <-schedule
<...>-3677 [001] 6094.628403: pick_next_task_rt <-schedule
<...>-3677 [001] 6094.628404: pick_next_task_fair <-schedule
<...>-3677 [001] 6094.628405: pick_next_task_idle <-schedule
<...>-3677 [001] 6094.628406: calc_load_account_active <-pick_next_task_idle
<...>-3677 [001] 6094.628407: perf_counter_task_sched_out <-schedule
<swapper>-0 [001] 6094.628437: finish_task_switch <-schedule
<swapper>-0 [001] 6094.628438: perf_counter_task_sched_in <-finish_task_switch
<swapper>-0 [001] 6094.628439: _spin_unlock_irq <-finish_task_switch
<swapper>-0 [001] 6094.628440: kretprobe_table_lock_ptr <-kretprobe_table_lock
<swapper>-0 [001] 6094.628442: _spin_lock_irqsave <-kretprobe_table_lock
....
bash-3580 [000] 6119.756585: native_apic_mem_read <-default_get_apic_id
bash-3580 [000] 6119.756616: crash_save_cpu <-native_machine_crash_shutdown
bash-3580 [000] 6119.756687: append_elf_note <-crash_save_cpu
bash-3580 [000] 6119.756688: strlen <-append_elf_note
bash-3580 [000] 6119.756712: final_note <-crash_save_cpu
bash-3580 [000] 6119.756776: machine_kexec <-crash_kexec
bash-3580 [000] 6119.756824: page_address <-machine_kexec
EXAMPLE, shows function_graph tracer
crash > trace show
1) 1.187 us | }
1) | hrtimer_forward() {
1) 1.018 us | ktime_add_safe();
1) 0.953 us | ktime_add_safe();
1) 5.419 us | }
1) + 87.322 us | }
1) 1.028 us | _spin_lock();
1) 1.779 us | enqueue_hrtimer();
1) ! 100.743 us | }
1) 1.043 us | _spin_unlock();
1) | tick_program_event() {
1) | tick_dev_program_event() {
1) 1.148 us | ktime_get();
EXAMPLE, shows various events
crash > trace show
<swapper>-0 [001] 9349.585217: softirq_exit: vec=1
<swapper>-0 [001] 9349.585218: softirq_entry: vec=8
<swapper>-0 [001] 9349.585226: kmem_cache_free: call_site=c015a221 ptr=0xcfb16200
<swapper>-0 [001] 9349.585228: kmem_cache_free: call_site=c0151c32 ptr=0xcfb438c0
<swapper>-0 [001] 9349.585230: sched_process_free: task dhclient-script:3749 [120]
<swapper>-0 [001] 9349.585237: kfree: call_site=c017f13a ptr=(nil)
<swapper>-0 [001] 9349.585239: kmem_cache_free: call_site=c013b8f1 ptr=0xcf056ed0
<swapper>-0 [001] 9349.585241: softirq_exit: vec=8
<...>-3752 [000] 9349.585717: kmem_cache_alloc: call_site=c01b6a34 ptr=0xcf2c50b0 bytes_req=88 bytes_alloc=88 gfp_flags=80d0
<...>-3752 [000] 9349.585732: kmem_cache_alloc: call_site=c01b95fa ptr=0xcf2c61e0 bytes_req=12 bytes_alloc=16 gfp_flags=d0
Signed-off-by: Lai Jiangshan <laijs(a)cn.fujitsu.com>
---
diff --git a/Makefile b/Makefile
index 4996cb2..a14ecc3 100644
--- a/Makefile
+++ b/Makefile
@@ -97,7 +97,7 @@ OBJECT_FILES=main.o tools.o global_data.o memory.o filesys.o help.o task.o \
lkcd_x86_trace.o unwind_v1.o unwind_v2.o unwind_v3.o \
unwind_x86_32_64.o \
xen_hyper.o xen_hyper_command.o xen_hyper_global_data.o \
- xen_hyper_dump_tables.o
+ xen_hyper_dump_tables.o ftrace.o
# These are the current set of crash extensions sources. They are not built
# by default unless the third command line of the "all:" stanza is uncommented.
diff --git a/defs.h b/defs.h
index 1b0950e..3bb54eb 100755
--- a/defs.h
+++ b/defs.h
@@ -512,6 +512,7 @@ struct kernel_table { /* kernel data */
uint kernel_version[3];
uint gcc_version[3];
int runq_siblings;
+ int nr_cpu_ids;
int kernel_NR_CPUS;
long __per_cpu_offset[NR_CPUS];
long *__rq_idx;
@@ -3091,6 +3092,7 @@ void cmd_sys(void); /* kernel.c */
void cmd_irq(void); /* kernel.c */
void cmd_timer(void); /* kernel.c */
void cmd_waitq(void); /* kernel.c */
+void cmd_ftrace(void); /* ftrace.c */
void cmd_sym(void); /* symbols.c */
void cmd_struct(void); /* symbols.c */
void cmd_union(void); /* symbols.c */
@@ -3272,6 +3274,8 @@ int endian_mismatch(char *, char, ulong);
uint16_t swap16(uint16_t, int);
uint32_t swap32(uint32_t, int);
+void ftrace_init(void);
+
/*
* symbols.c
*/
@@ -3526,6 +3530,7 @@ extern char *help_repeat[];
extern char *help_runq[];
extern char *help_search[];
extern char *help_set[];
+extern char *help_ftrace[];
extern char *help_sig[];
extern char *help_struct[];
extern char *help_swap[];
diff --git a/ftrace.c b/ftrace.c
new file mode 100644
index 0000000..febcd05
--- /dev/null
+++ b/ftrace.c
@@ -0,0 +1,2161 @@
+#define _GNU_SOURCE
+#include "defs.h"
+#include <stdio.h>
+#include <ctype.h>
+#include <stdbool.h>
+#include <setjmp.h>
+
+/* TODO: use more correct way to handle the return value of readmem() */
+
+static int verbose = 0;
+
+/*
+ * lockless ring_buffer and old non-lockless ring_buffer are both supported.
+ */
+#define koffset(struct, member) struct##_##member##_offset
+
+static int ftrace_initialized;
+static int ftrace_no_ftrace;
+
+static int koffset(trace_array, buffer);
+static int koffset(tracer, name);
+
+static int lockless_ring_buffer;
+
+static int koffset(ring_buffer, pages);
+static int koffset(ring_buffer, flags);
+static int koffset(ring_buffer, cpus);
+static int koffset(ring_buffer, buffers);
+
+static int koffset(ring_buffer_per_cpu, cpu);
+static int koffset(ring_buffer_per_cpu, pages);
+static int koffset(ring_buffer_per_cpu, head_page);
+static int koffset(ring_buffer_per_cpu, tail_page);
+static int koffset(ring_buffer_per_cpu, commit_page);
+static int koffset(ring_buffer_per_cpu, reader_page);
+static int koffset(ring_buffer_per_cpu, overrun);
+static int koffset(ring_buffer_per_cpu, entries);
+
+static int koffset(buffer_page, read);
+static int koffset(buffer_page, list);
+static int koffset(buffer_page, page);
+
+static int koffset(list_head, next);
+
+static int koffset(ftrace_event_call, list);
+static int koffset(ftrace_event_call, name);
+static int koffset(ftrace_event_call, system);
+static int koffset(ftrace_event_call, id);
+static int koffset(ftrace_event_call, fields);
+
+static int koffset(ftrace_event_field, link);
+static int koffset(ftrace_event_field, name);
+static int koffset(ftrace_event_field, type);
+static int koffset(ftrace_event_field, offset);
+static int koffset(ftrace_event_field, size);
+static int koffset(ftrace_event_field, is_signed);
+
+static int koffset(POINTER_SYM, POINTER) = 0;
+
+struct ring_buffer_per_cpu {
+ ulong kaddr;
+
+ ulong head_page;
+ ulong tail_page;
+ ulong commit_page;
+ ulong reader_page;
+ ulong real_head_page;
+
+ ulong *pages;
+ int head_page_index;
+
+ ulong overrun;
+ ulong entries;
+};
+
+static ulong global_trace;
+static ulong max_tr_trace;
+
+static ulong global_ring_buffer;
+static ulong max_tr_ring_buffer;
+
+static unsigned global_pages;
+static unsigned max_tr_pages;
+
+static struct ring_buffer_per_cpu *global_buffers;
+static struct ring_buffer_per_cpu *max_tr_buffers;
+
+static ulong ftrace_events;
+static ulong current_trace;
+static const char *current_trace_name;
+
+static void *page_tmp;
+
+/* at = ((struct *)ptr)->member */
+#define read_value(at, ptr, struct, member) \
+ do { \
+ if (!readmem(ptr + koffset(struct, member), KVADDR, \
+ &at, sizeof(at), #struct " " #member, \
+ RETURN_ON_ERROR | QUIET)) \
+ error(FATAL, "cannot read value, ptr%lu, %d\n", ptr, __LINE__);\
+ } while (0)
+
+static void init_offsets(void)
+{
+#define init_offset(struct, member) koffset(struct, member) \
+ = MEMBER_OFFSET(#struct, #member);
+
+ init_offset(trace_array, buffer);
+ init_offset(tracer, name);
+
+ init_offset(ring_buffer, pages);
+ init_offset(ring_buffer, flags);
+ init_offset(ring_buffer, cpus);
+ init_offset(ring_buffer, buffers);
+
+ if (MEMBER_SIZE("ring_buffer_per_cpu", "pages") == sizeof(ulong)) {
+ lockless_ring_buffer = 1;
+ if (verbose)
+ fprintf(fp, "lockless\n");
+ }
+
+ init_offset(ring_buffer_per_cpu, cpu);
+ init_offset(ring_buffer_per_cpu, pages);
+ init_offset(ring_buffer_per_cpu, head_page);
+ init_offset(ring_buffer_per_cpu, tail_page);
+ init_offset(ring_buffer_per_cpu, commit_page);
+ init_offset(ring_buffer_per_cpu, reader_page);
+ init_offset(ring_buffer_per_cpu, overrun);
+ init_offset(ring_buffer_per_cpu, entries);
+
+ init_offset(buffer_page, read);
+ init_offset(buffer_page, list);
+ init_offset(buffer_page, page);
+
+ init_offset(list_head, next);
+
+ init_offset(ftrace_event_call, list);
+ init_offset(ftrace_event_call, name);
+ init_offset(ftrace_event_call, system);
+ init_offset(ftrace_event_call, id);
+ init_offset(ftrace_event_call, fields);
+
+ init_offset(ftrace_event_field, link);
+ init_offset(ftrace_event_field, name);
+ init_offset(ftrace_event_field, type);
+ init_offset(ftrace_event_field, offset);
+ init_offset(ftrace_event_field, size);
+ init_offset(ftrace_event_field, is_signed);
+#undef init_offset
+}
+
+static void print_offsets(void)
+{
+ if (!verbose)
+ return;
+
+#define print_offset(struct, member) fprintf(fp, \
+ "koffset(" #struct ", " #member ") = %d\n", koffset(struct, member))
+
+ print_offset(trace_array, buffer);
+ print_offset(tracer, name);
+
+ print_offset(ring_buffer, pages);
+ print_offset(ring_buffer, flags);
+ print_offset(ring_buffer, cpus);
+ print_offset(ring_buffer, buffers);
+
+ print_offset(ring_buffer_per_cpu, cpu);
+ print_offset(ring_buffer_per_cpu, pages);
+ print_offset(ring_buffer_per_cpu, head_page);
+ print_offset(ring_buffer_per_cpu, tail_page);
+ print_offset(ring_buffer_per_cpu, commit_page);
+ print_offset(ring_buffer_per_cpu, reader_page);
+ print_offset(ring_buffer_per_cpu, overrun);
+ print_offset(ring_buffer_per_cpu, entries);
+
+ print_offset(buffer_page, read);
+ print_offset(buffer_page, list);
+ print_offset(buffer_page, page);
+
+ print_offset(list_head, next);
+
+ print_offset(ftrace_event_call, list);
+ print_offset(ftrace_event_call, name);
+ print_offset(ftrace_event_call, system);
+ print_offset(ftrace_event_call, id);
+ print_offset(ftrace_event_call, fields);
+
+ print_offset(ftrace_event_field, link);
+ print_offset(ftrace_event_field, name);
+ print_offset(ftrace_event_field, type);
+ print_offset(ftrace_event_field, offset);
+ print_offset(ftrace_event_field, size);
+ print_offset(ftrace_event_field, is_signed);
+#undef print_offset
+}
+
+static void ftrace_init_pages(struct ring_buffer_per_cpu *cpu_buffer,
+ unsigned nr_pages)
+{
+ unsigned j;
+ ulong head, page;
+ ulong real_head_page = cpu_buffer->head_page;
+
+
+ j = 0;
+ cpu_buffer->pages = calloc(sizeof(ulong), nr_pages);
+
+ if (lockless_ring_buffer) {
+ read_value(head, cpu_buffer->kaddr, ring_buffer_per_cpu, pages);
+ cpu_buffer->pages[j++] = head - koffset(buffer_page, list);
+ } else
+ head = cpu_buffer->kaddr + koffset(ring_buffer_per_cpu, pages);
+
+ page = head;
+ for (;;) {
+ read_value(page, page, list_head, next);
+ if (page & 3) {
+ /* lockless_ring_buffer */
+ page &= ~3;
+ real_head_page = page - koffset(buffer_page, list);
+ }
+
+ if (j == nr_pages)
+ break;
+
+ if (page == head)
+ error(FATAL, "pages 1\n");
+
+ cpu_buffer->pages[j++] = page - koffset(buffer_page, list);
+ }
+
+ if (page != head)
+ error(FATAL, "pages 2\n");
+
+ cpu_buffer->real_head_page = real_head_page;
+ cpu_buffer->head_page_index = -1;
+
+ for (j = 0; j < nr_pages; j++) {
+ if (cpu_buffer->pages[j] == real_head_page) {
+ cpu_buffer->head_page_index = j;
+ break;
+ }
+ }
+
+ if (cpu_buffer->head_page_index == -1)
+ error(FATAL, "error for resolve head_page_index\n");
+}
+
+static void ftrace_init_buffers(struct ring_buffer_per_cpu *buffers,
+ ulong ring_buffer, unsigned pages)
+{
+ int i;
+ ulong buffers_array;
+ ulong *tmp = calloc(sizeof(ulong), kt->nr_cpu_ids);
+
+ read_value(buffers_array, ring_buffer, ring_buffer, buffers);
+
+ if (!readmem(buffers_array, KVADDR, tmp, sizeof(ulong) * kt->nr_cpu_ids,
+ "ring_buffer, buffers, array", RETURN_ON_ERROR|QUIET))
+ error(FATAL, "cannot read ring_buffer's buffers-array\n");
+
+ for (i = 0; i < kt->nr_cpu_ids; i++) {
+ if (!tmp[i])
+ continue;
+
+ buffers[i].kaddr = tmp[i];
+
+#define buffer_read_value(member) read_value(buffers[i].member, \
+ buffers[i].kaddr, ring_buffer_per_cpu, member)
+
+ buffer_read_value(head_page);
+ buffer_read_value(tail_page);
+ buffer_read_value(commit_page);
+ buffer_read_value(reader_page);
+ buffer_read_value(overrun);
+ buffer_read_value(entries);
+#undef buffer_read_value
+
+ ftrace_init_pages(buffers + i, pages);
+
+ if (verbose) {
+ fprintf(fp, "overrun=%lu\n", buffers[i].overrun);
+ fprintf(fp, "entries=%lu\n", buffers[i].entries);
+ }
+ }
+
+ free(tmp);
+}
+
+static void ftrace_init_event_types(void);
+static void ftrace_show_init(void);
+
+void ftrace_init(void)
+{
+ ulong addr;
+ char tmp[128];
+
+ if (!symbol_exists("global_trace")) {
+ ftrace_no_ftrace = 1;
+ ftrace_initialized = 1;
+ return;
+ }
+
+ global_trace = symbol_value("global_trace");
+ max_tr_trace = symbol_value("global_trace");
+
+ init_offsets();
+ print_offsets();
+
+ read_value(global_ring_buffer, global_trace, trace_array, buffer);
+ read_value(max_tr_ring_buffer, max_tr_trace, trace_array, buffer);
+
+ read_value(global_pages, global_ring_buffer, ring_buffer, pages);
+ read_value(max_tr_pages, max_tr_ring_buffer, ring_buffer, pages);
+
+ global_buffers = calloc(sizeof(*global_buffers), kt->nr_cpu_ids);
+ max_tr_buffers = calloc(sizeof(*max_tr_buffers), kt->nr_cpu_ids);
+
+ ftrace_init_buffers(global_buffers, global_ring_buffer, global_pages);
+ ftrace_init_buffers(max_tr_buffers, max_tr_ring_buffer, max_tr_pages);
+
+ page_tmp = malloc(PAGESIZE());
+
+ ftrace_events = symbol_value("ftrace_events");
+ ftrace_init_event_types();
+
+ addr = symbol_value("current_trace");
+ read_value(current_trace, addr, POINTER_SYM, POINTER);
+ read_value(addr, current_trace, tracer, name);
+ read_string(addr, tmp, 128);
+ current_trace_name = strdup(tmp);
+
+ ftrace_initialized = 1;
+
+ ftrace_show_init();
+}
+
+static void ftrace_dump_page(FILE *out, ulong page)
+{
+ ulong raw_page;
+
+ read_value(raw_page, page, buffer_page, page);
+
+ if (!readmem(raw_page, KVADDR, page_tmp, PAGESIZE(), "get page context",
+ RETURN_ON_ERROR | QUIET))
+ error(FATAL, "cannot get page context\n");
+
+ fwrite(page_tmp, 1, PAGESIZE(), out);
+}
+
+static void ftrace_dump_buffer(FILE *out, struct ring_buffer_per_cpu *cpu_buffer,
+ unsigned pages)
+{
+ unsigned i;
+
+ ftrace_dump_page(out, cpu_buffer->reader_page);
+
+ if (cpu_buffer->reader_page == cpu_buffer->commit_page)
+ return;
+
+ i = cpu_buffer->head_page_index;
+ for (;;) {
+ ftrace_dump_page(out, cpu_buffer->pages[i]);
+
+ if (cpu_buffer->pages[i] == cpu_buffer->commit_page)
+ break;
+
+ i++;
+ if (i == pages)
+ i = 0;
+
+ if (i == cpu_buffer->head_page_index) {
+ /* cpu_buffer->commit_page may be corrupted */
+ break;
+ }
+ }
+}
+
+static void ftrace_dump_buffers(const char *per_cpu_path)
+{
+ int i;
+
+ for (i = 0; i < kt->nr_cpu_ids; i++) {
+ char *path;
+ FILE *out;
+
+ if (!global_buffers[i].kaddr)
+ continue;
+
+ asprintf(&path, "%s/cpu%d", per_cpu_path, i);
+ mkdir(path, 0755);
+ free(path);
+
+ asprintf(&path, "%s/cpu%d/trace_pipe_raw", per_cpu_path, i);
+ out = fopen(path, "wb");
+ free(path);
+
+ ftrace_dump_buffer(out, global_buffers + i, global_pages);
+ fclose(out);
+ }
+}
+
+typedef uint64_t u64;
+typedef int64_t s64;
+typedef uint32_t u32;
+
+#define MAX_CACHE_ID 256
+
+struct ftrace_field;
+typedef u64 (*access_op)(struct ftrace_field *aop, void *data);
+static void ftrace_field_access_init(struct ftrace_field *f);
+
+struct ftrace_field {
+ const char *name;
+ const char *type;
+ access_op op;
+ int offset;
+ int size;
+ int is_signed;
+};
+
+struct event_type;
+struct format_context;
+typedef void (*event_printer)(struct event_type *t, struct format_context *fc);
+
+ /* SIGH, we cann't get "print fmt" from core-file */
+
+struct event_type {
+ struct event_type *next;
+ const char *system;
+ const char *name;
+ int plugin;
+ event_printer printer;
+ const char *print_fmt;
+ int id;
+ int nfields;
+ struct ftrace_field *fields;
+};
+
+static struct event_type *event_type_cache[MAX_CACHE_ID];
+static struct event_type **event_types;
+static int nr_event_types;
+
+/*
+ * TODO: implement event_generic_print_fmt_print() when the print fmt
+ * in tracing/events/$SYSTEM/$TRACE/format becomes a will-defined
+ * language.
+ */
+static void event_generic_print_fmt_print(struct event_type *t,
+ struct format_context *fc);
+static void event_default_print(struct event_type *t,
+ struct format_context *fc);
+
+static void ftrace_init_event_type(ulong call, struct event_type *aevent_type)
+{
+ ulong fields_addr, pos;
+
+ int nfields = 0, max_fields = 16;
+ struct ftrace_field *fields;
+
+
+ fields_addr = call + koffset(ftrace_event_call, fields);
+ read_value(pos, fields_addr, list_head, next);
+
+ if (pos == 0) {
+ aevent_type->nfields = 0;
+ aevent_type->fields = NULL;
+ if (verbose)
+ fprintf(fp, "no field %lu\n", call);
+ return;
+ }
+
+ fields = malloc(sizeof(*fields) * max_fields);
+
+ while (pos != fields_addr) {
+ ulong field = pos - koffset(ftrace_event_field, link);
+ ulong name_addr, type_addr;
+ char field_name[128], field_type[128];
+ int offset, size, is_signed;
+
+ read_value(name_addr, field, ftrace_event_field, name);
+ read_value(type_addr, field, ftrace_event_field, type);
+ read_value(offset, field, ftrace_event_field, offset);
+ read_value(size, field, ftrace_event_field, size);
+ read_value(is_signed, field, ftrace_event_field, is_signed);
+
+ read_string(name_addr, field_name, 128);
+ read_string(type_addr, field_type, 128);
+
+ if (nfields >= max_fields) {
+ max_fields *= 2;
+ fields = realloc(fields, sizeof(*fields) * max_fields);
+ }
+
+ fields[nfields].name = strdup(field_name);
+ fields[nfields].type = strdup(field_type);
+ fields[nfields].offset = offset;
+ fields[nfields].size = size;
+ fields[nfields].is_signed = is_signed;
+ ftrace_field_access_init(&fields[nfields]);
+ nfields++;
+
+ read_value(pos, pos, list_head, next);
+ }
+
+ aevent_type->nfields = nfields;
+ aevent_type->fields = fields;
+}
+
+static void ftrace_init_event_types(void)
+{
+ ulong event;
+ int max_types = 128;
+
+ event_types = malloc(sizeof(*event_types) * max_types);
+
+ read_value(event, ftrace_events, list_head, next);
+ while (event != ftrace_events) {
+ ulong call = event - koffset(ftrace_event_call, list);
+ ulong name_addr, system_addr;
+ char name[128], system[128];
+ int id;
+
+ struct event_type *aevent_type = malloc(sizeof(*aevent_type));
+
+ read_value(id, call, ftrace_event_call, id);
+ read_value(name_addr, call, ftrace_event_call, name);
+ read_value(system_addr, call, ftrace_event_call, system);
+
+ read_string(name_addr, name, 128);
+ read_string(system_addr, system, 128);
+
+ aevent_type->system = strdup(system);
+ aevent_type->name = strdup(name);
+ aevent_type->id = id;
+
+ if (id < MAX_CACHE_ID)
+ event_type_cache[id] = aevent_type;
+
+ if (nr_event_types >= max_types) {
+ max_types *= 2;
+ event_types = realloc(event_types,
+ sizeof(*event_types) * max_types);
+ }
+ event_types[nr_event_types++] = aevent_type;
+
+ ftrace_init_event_type(call, aevent_type);
+ if (!strcmp("ftrace", aevent_type->system))
+ aevent_type->plugin = 1;
+ else
+ aevent_type->plugin = 0;
+ aevent_type->printer = event_default_print;
+
+ read_value(event, event, list_head, next);
+ }
+}
+
+static struct ftrace_field *find_event_field(struct event_type *t, const char *name)
+{
+ int i;
+ struct ftrace_field *f;
+
+ for (i = 0; i < t->nfields; i++) {
+ f = &t->fields[i];
+ if (!strcmp(name, f->name))
+ return f;
+ }
+
+ return NULL;
+}
+
+static struct event_type *find_event_type(int id)
+{
+ int i;
+
+ if ((unsigned int)id < MAX_CACHE_ID)
+ return event_type_cache[id];
+
+ for (i = 0; i < nr_event_types; i++) {
+ if (event_types[i]->id == id)
+ return event_types[i];
+ }
+
+ return NULL;
+}
+
+static
+struct event_type *find_event_type_by_name(const char *system, const char *name)
+{
+ int i;
+
+ for (i = 0; i < nr_event_types; i++) {
+ if (system && strcmp(system, event_types[i]->system))
+ continue;
+ if (!strcmp(name, event_types[i]->name))
+ return event_types[i];
+ }
+
+ return NULL;
+}
+
+static void ftrace_dump_event_type(struct event_type *t, const char *path)
+{
+ char *format_path;
+ FILE *out;
+ int i;
+
+ asprintf(&format_path, "%s/format", path);
+ out = fopen(format_path, "w");
+ free(format_path);
+
+ fprintf(out, "name: %s\n", t->name);
+ fprintf(out, "ID: %d\n", t->id);
+ fprintf(out, "format:\n");
+
+ for (i = 0; i < t->nfields; i++) {
+ struct ftrace_field *f = &t->fields[i];
+
+ fprintf(out, "\tfield:%s %s;\toffset:%d;\tsize:%d;\n",
+ f->type, f->name, f->offset, f->size);
+ }
+
+ /* TODO */
+ fprintf(out, "\nprint fmt: \"unknow fmt from dump\"\n");
+ fclose(out);
+}
+
+static void ftrace_dump_event_types(const char *events_path)
+{
+ int i;
+
+ for (i = 0; i < nr_event_types; i++) {
+ char *path;
+ struct event_type *t = event_types[i];
+
+ asprintf(&path, "%s/%s", events_path, t->system);
+ mkdir(path, 0755);
+ free(path);
+
+ asprintf(&path, "%s/%s/%s", events_path, t->system, t->name);
+ mkdir(path, 0755);
+
+ ftrace_dump_event_type(t, path);
+ free(path);
+ }
+}
+
+struct ring_buffer_per_cpu_stream {
+ ulong *pages;
+ void *page_tmp;
+ int available_pages;
+ int curr_page_indx;
+
+ uint64_t ts;
+ uint32_t *offset;
+ uint32_t *commit;
+};
+
+static
+int ring_buffer_per_cpu_stream_init(struct ring_buffer_per_cpu *cpu_buffer,
+ unsigned pages, struct ring_buffer_per_cpu_stream *s)
+{
+ unsigned i, count = 0;
+
+ s->page_tmp = malloc(PAGESIZE());
+ if (!s->page_tmp)
+ return -1;
+
+ s->pages = malloc(sizeof(ulong) * (pages + 1));
+ if (!s->pages) {
+ free(s->page_tmp);
+ return -1;
+ }
+
+ s->pages[count++] = cpu_buffer->reader_page;
+
+ if (cpu_buffer->reader_page == cpu_buffer->commit_page)
+ goto pages_done;
+
+ i = cpu_buffer->head_page_index;
+ for (;;) {
+ s->pages[count++] = cpu_buffer->pages[i];
+
+ if (cpu_buffer->pages[i] == cpu_buffer->commit_page)
+ break;
+
+ i++;
+ if (i == pages)
+ i = 0;
+
+ if (i == cpu_buffer->head_page_index) {
+ /* cpu_buffer->commit_page may be corrupted */
+ break;
+ }
+ }
+
+pages_done:
+ s->available_pages = count;
+ s->curr_page_indx = -1;
+ return 0;
+}
+
+static
+void ring_buffer_per_cpu_stream_destroy(struct ring_buffer_per_cpu_stream *s)
+{
+ free(s->page_tmp);
+ free(s->pages);
+}
+
+struct ftrace_event {
+ uint64_t ts;
+ int length;
+ void *data;
+};
+
+struct event {
+ u32 type_len:5, time_delta:27;
+};
+
+#define RINGBUF_TYPE_PADDING 29
+#define RINGBUF_TYPE_TIME_EXTEND 30
+#define RINGBUF_TYPE_TIME_STAMP 31
+#define RINGBUF_TYPE_DATA 0 ... 28
+
+#define sizeof_local_t (sizeof(ulong))
+#define PAGE_HEADER_LEN (8 + sizeof_local_t)
+
+static
+void ring_buffer_per_cpu_stream_get_page(struct ring_buffer_per_cpu_stream *s)
+{
+ ulong raw_page;
+
+ read_value(raw_page, s->pages[s->curr_page_indx], buffer_page, page);
+
+ if (!readmem(raw_page, KVADDR, s->page_tmp, PAGESIZE(),
+ "get page context", RETURN_ON_ERROR | QUIET))
+ error(FATAL, "cannot get page context\n");
+
+ s->ts = *(u64 *)s->page_tmp;
+ s->offset = s->page_tmp + PAGE_HEADER_LEN;
+ s->commit = s->offset + *(ulong *)(s->page_tmp + 8) / 4;
+}
+
+static
+int ring_buffer_per_cpu_stream_pop_event(struct ring_buffer_per_cpu_stream *s,
+ struct ftrace_event *res)
+{
+ struct event *event;
+
+ res->data = NULL;
+
+ if (s->curr_page_indx >= s->available_pages)
+ return -1;
+
+again:
+ if ((s->curr_page_indx == -1) || (s->offset >= s->commit)) {
+ s->curr_page_indx++;
+ if (s->curr_page_indx == s->available_pages)
+ return -1;
+
+ ring_buffer_per_cpu_stream_get_page(s);
+ if (s->offset >= s->commit)
+ goto again;
+ }
+
+ event = (void *)s->offset;
+
+ switch (event->type_len) {
+ case RINGBUF_TYPE_PADDING:
+ if (event->time_delta)
+ s->offset += 1 + ((*(s->offset + 1) + 3) / 4);
+ else
+ s->offset = s->commit;
+ goto again;
+
+ case RINGBUF_TYPE_TIME_EXTEND:
+ s->ts +=event->time_delta;
+ s->ts += ((u64)*(s->offset + 1)) << 27;
+ s->offset += 2;
+ goto again;
+
+ case RINGBUF_TYPE_TIME_STAMP:
+ /* FIXME: not implemented */
+ s->offset += 4;
+ goto again;
+
+ case RINGBUF_TYPE_DATA:
+ if (!event->type_len) {
+ res->data = s->offset + 2;
+ res->length = *(s->offset + 1) - 4;
+
+ s->offset += 1 + ((*(s->offset + 1) + 3) / 4);
+ } else {
+ res->data = s->offset + 1;
+ res->length = event->type_len * 4;
+
+ s->offset += 1 + event->type_len;
+ }
+
+ if (s->offset > s->commit) {
+ fprintf(fp, "corrupt\n");
+ res->data = NULL;
+ goto again;
+ }
+
+ s->ts += event->time_delta;
+ res->ts = s->ts;
+
+ return 0;
+
+ default:;
+ }
+
+ return -1;
+}
+
+struct ring_buffer_stream {
+ struct ring_buffer_per_cpu_stream *ss;
+ struct ftrace_event *es;
+ u64 ts;
+ int popped_cpu;
+ int pushed;
+};
+
+static
+void ring_buffer_stream_init(struct ring_buffer_stream *s, bool *cpulist)
+{
+ int cpu;
+
+ s->ss = malloc(sizeof(*s->ss) * kt->nr_cpu_ids);
+ s->es = malloc(sizeof(*s->es) * kt->nr_cpu_ids);
+
+ for (cpu = 0; cpu < kt->nr_cpu_ids; cpu++) {
+ s->es[cpu].data = NULL;
+
+ if (!global_buffers[cpu].kaddr)
+ continue;
+
+ if (cpulist && !cpulist[cpu])
+ continue;
+
+ ring_buffer_per_cpu_stream_init(global_buffers + cpu,
+ global_pages, s->ss + cpu);
+ }
+
+ s->ts = 0;
+ s->popped_cpu = kt->nr_cpu_ids;
+ s->pushed = 0;
+}
+
+static
+void ring_buffer_stream_destroy(struct ring_buffer_stream *s, bool *cpulist)
+{
+ int cpu;
+
+ for (cpu = 0; cpu < kt->nr_cpu_ids; cpu++) {
+ if (!global_buffers[cpu].kaddr)
+ continue;
+ if (cpulist && !cpulist[cpu])
+ continue;
+ ring_buffer_per_cpu_stream_destroy(s->ss + cpu);
+ }
+
+ free(s->ss);
+ free(s->es);
+}
+
+/* make current event be returned again at next pop */
+static void ring_buffer_stream_push_current_event(struct ring_buffer_stream *s)
+{
+ if ((s->popped_cpu < 0) || (s->popped_cpu == kt->nr_cpu_ids))
+ return;
+
+ s->pushed = 1;
+}
+
+/* return the cpu# of this event */
+static int ring_buffer_stream_pop_event(struct ring_buffer_stream *s,
+ struct ftrace_event *res)
+{
+ int cpu, min_cpu = -1;
+ u64 ts, min_ts;
+
+ res->data = NULL;
+
+ if (s->popped_cpu < 0)
+ return -1;
+
+ if (s->popped_cpu == kt->nr_cpu_ids) {
+ for (cpu = 0; cpu < kt->nr_cpu_ids; cpu++) {
+ if (!global_buffers[cpu].kaddr)
+ continue;
+
+ ring_buffer_per_cpu_stream_pop_event(s->ss + cpu,
+ s->es + cpu);
+
+ if (!s->es[cpu].data)
+ continue;
+
+ /*
+ * We do not have start point of time,
+ * determine the min_ts with heuristic way.
+ */
+ ts = s->es[cpu].ts;
+ if (min_cpu < 0 || (s64)(ts - min_ts) < 0) {
+ min_ts = ts;
+ min_cpu = cpu;
+ }
+ }
+
+ s->pushed = 0;
+ goto done;
+ }
+
+ if (s->pushed) {
+ s->pushed = 0;
+ *res = s->es[s->popped_cpu];
+ return s->popped_cpu;
+ }
+
+ ring_buffer_per_cpu_stream_pop_event(&s->ss[s->popped_cpu],
+ &s->es[s->popped_cpu]);
+
+ for (cpu = 0; cpu < kt->nr_cpu_ids; cpu++) {
+ if (!s->es[cpu].data)
+ continue;
+
+ /* we have start point of time(s->ts) */
+ ts = s->es[cpu].ts - s->ts;
+ if (min_cpu < 0 || ts < min_ts) {
+ min_ts = ts;
+ min_cpu = cpu;
+ }
+ }
+
+done:
+ s->popped_cpu = min_cpu;
+
+ if (min_cpu < 0)
+ return -1;
+
+ s->ts = s->es[min_cpu].ts;
+ *res = s->es[min_cpu];
+
+ return min_cpu;
+}
+
+static u64 access_error(struct ftrace_field *f, void *data)
+{
+ return 0;
+}
+
+static u64 access_8(struct ftrace_field *f, void *data)
+{
+ return *(int8_t *)(data + f->offset);
+}
+
+static u64 access_16(struct ftrace_field *f, void *data)
+{
+ return *(int16_t *)(data + f->offset);
+}
+
+static u64 access_32(struct ftrace_field *f, void *data)
+{
+ return *(int32_t *)(data + f->offset);
+}
+
+static u64 access_64(struct ftrace_field *f, void *data)
+{
+ return *(int64_t *)(data + f->offset);
+}
+
+static u64 access_string_local(struct ftrace_field *f, void *data)
+{
+ return (long)(data + *(int16_t *)(data + f->offset));
+}
+
+static u64 access_string(struct ftrace_field *f, void *data)
+{
+ return (long)(data + f->offset);
+}
+
+static u64 access_other_local(struct ftrace_field *f, void *data)
+{
+ return (long)(data + *(int16_t *)(data + f->offset));
+}
+
+static u64 access_other(struct ftrace_field *f, void *data)
+{
+ return (long)(data + f->offset);
+}
+
+static void ftrace_field_access_init(struct ftrace_field *f)
+{
+ /* guess whether it is string array */
+ if (!strncmp(f->type, "__data_loc", sizeof("__data_loc") - 1)) {
+ if (f->size != 2) {
+ /* TODO: kernel side may be changed, need fix */
+ f->op = access_error;
+ } else if (strstr(f->type, "char")) {
+ /* TODO: finish kernel side. */
+ f->op = access_string_local;
+ } else {
+ /* TODO: finish kernel side. */
+ f->op = access_other;
+ }
+ } else if (strchr(f->type, '[')) {
+ if (strstr(f->type, "char"))
+ f->op = access_string;
+ else
+ f->op = access_other;
+ } else {
+ switch (f->size) {
+ case 1: f->op = access_8; break;
+ case 2: f->op = access_16; break;
+ case 4: f->op = access_32; break;
+ case 8: f->op = access_64; break;
+ default: f->op = access_other; break;
+ }
+ }
+}
+
+static void show_basic_info(void)
+{
+ fprintf(fp, "current tracer is %s\n", current_trace_name);
+}
+
+static void dump_saved_cmdlines(const char *dump_tracing_dir)
+{
+ char *path;
+ FILE *out;
+ int i;
+ struct task_context *tc;
+
+ asprintf(&path, "%s/saved_cmdlines", dump_tracing_dir);
+ out = fopen(path, "w");
+ free(path);
+
+ tc = FIRST_CONTEXT();
+ for (i = 0; i < RUNNING_TASKS(); i++)
+ fprintf(out, "%d %s\n", (int)tc[i].pid, tc[i].comm);
+
+ fclose(out);
+}
+
+static void ftrace_dump(int argc, char *argv[])
+{
+ int c;
+ int dump_meta_data = 0;
+ int dump_symbols = 0;
+ char *dump_tracing_dir;
+ char *path;
+ int ret;
+
+ while ((c = getopt(argc, argv, "sm")) != EOF) {
+ switch(c)
+ {
+ case 's':
+ dump_symbols = 1;
+ break;
+ case 'm':
+ dump_meta_data = 1;
+ break;
+ default:
+ cmd_usage(pc->curcmd, SYNOPSIS);
+ return;
+ }
+ }
+
+ if (argc - optind == 0) {
+ dump_tracing_dir = "dump_tracing_dir";
+ } else if (argc - optind == 1) {
+ dump_tracing_dir = argv[optind];
+ } else {
+ cmd_usage(pc->curcmd, SYNOPSIS);
+ return;
+ }
+
+ ret = mkdir(dump_tracing_dir, 0755);
+ if (ret < 0)
+ return;
+
+ asprintf(&path, "%s/per_cpu", dump_tracing_dir);
+ mkdir(path, 0755);
+ ftrace_dump_buffers(path);
+ free(path);
+
+ if (dump_meta_data) {
+ asprintf(&path, "%s/events", dump_tracing_dir);
+ mkdir(path, 0755);
+ ftrace_dump_event_types(path);
+ free(path);
+
+ dump_saved_cmdlines(dump_tracing_dir);
+ }
+
+ if (dump_symbols) {
+ fprintf(fp, "\n-s option hasn't been implemented.\n");
+ fprintf(fp, "symbols is not dumpped.\n");
+ fprintf(fp, "You can use `sym -l > %s/kallsyms`\n\n",
+ dump_tracing_dir);
+ }
+}
+
+static char show_event_buf[4096];
+static int show_event_pos;
+
+#define INVALID_ACCESS_FIELD 1
+static jmp_buf show_event_env;
+
+struct format_context {
+ struct ring_buffer_stream stream;
+ struct ftrace_event event;
+ int cpu;
+};
+
+static struct format_context format_context;
+
+/* !!!! @event_type and @field_name should be const for every call */
+#define access_field(event_type, data, field_name) \
+({ \
+ static struct ftrace_field *__access_field##_field; \
+ \
+ if (!__access_field##_field) { \
+ __access_field##_field = find_event_field(event_type, \
+ field_name); \
+ } \
+ \
+ if (!__access_field##_field) { \
+ event_type->printer = event_default_print; \
+ ring_buffer_stream_push_current_event(&format_context.stream);\
+ longjmp(show_event_env, INVALID_ACCESS_FIELD); \
+ } \
+ \
+ __access_field##_field->op(__access_field##_field, data); \
+})
+
+static int ftrace_event_get_id(void *data)
+{
+ return access_field(event_types[0], data, "common_type");
+}
+
+static int ftrace_event_get_pid(void *data)
+{
+ return access_field(event_types[0], data, "common_pid");
+}
+
+#define event_printf(fmt, args...) \
+do { \
+ show_event_pos += snprintf(show_event_buf + show_event_pos, \
+ sizeof(show_event_buf) - show_event_pos, \
+ fmt, ##args); \
+} while (0)
+
+
+static void event_field_print(struct ftrace_field *f, u64 value)
+{
+ if (f->op == access_error) {
+ event_printf("<Error>");
+ } else if (f->op == access_8) {
+ if (f->is_signed)
+ event_printf("%d", (int8_t)value);
+ else
+ event_printf("%u", (uint8_t)value);
+ } else if (f->op == access_16) {
+ if (f->is_signed)
+ event_printf("%d", (int16_t)value);
+ else
+ event_printf("%u", (uint16_t)value);
+ } else if (f->op == access_32) {
+ if (f->is_signed)
+ event_printf("%d", (int32_t)value);
+ else
+ event_printf("%u", (uint32_t)value);
+ } else if (f->op == access_64) {
+ if (f->is_signed)
+ event_printf("%lld", (long long)value);
+ else
+ event_printf("%llu", (unsigned long long)value);
+ } else if (f->op == access_string_local) {
+ event_printf("%s", (char *)(long)value);
+ } else if (f->op == access_string) {
+ event_printf("%.*s", f->size, (char *)(long)value);
+ } else if (f->op == access_other) {
+ /* TODO */
+ } else if (f->op == access_other_local) {
+ /* TODO */
+ } else {
+ /* TODO */
+ }
+}
+
+static void get_comm_from_pid(int pid, char *comm)
+{
+ int li, hi;
+ struct task_context *tc;
+
+ if (pid == 0) {
+ strcpy(comm, "<swapper>");
+ return;
+ }
+
+ tc = FIRST_CONTEXT();
+
+ li = 0;
+ hi = RUNNING_TASKS();
+ while (li < hi) {
+ int mid = (li + hi) / 2;
+
+ if (tc[mid].pid > pid)
+ hi = mid;
+ else if (tc[mid].pid < pid)
+ li = mid + 1;
+ else {
+ strcpy(comm, tc[mid].comm);
+ return;
+ }
+ }
+
+ strcpy(comm, "<...>");
+}
+
+static void event_context_print(struct event_type *t, struct format_context *fc)
+{
+ u64 time = fc->event.ts / 1000;
+ ulong sec = time / 1000000;
+ ulong usec = time % 1000000;
+ int pid = ftrace_event_get_pid(fc->event.data);
+ char comm[20];
+
+ get_comm_from_pid(pid, comm);
+ event_printf("%16s-%-5d [%03d] %5lu.%06lu: ",
+ comm, pid, fc->cpu, sec, usec);
+}
+
+static int gopt_context_info;
+static int gopt_sym_offset;
+static int gopt_sym_addr;
+
+static int gopt_graph_print_duration;
+static int gopt_graph_print_overhead;
+static int gopt_graph_print_abstime;
+static int gopt_graph_print_cpu;
+static int gopt_graph_print_proc;
+static int gopt_graph_print_overrun;
+
+static void set_all_flags_default(void)
+{
+ gopt_context_info = 1;
+ gopt_sym_offset = 0;
+ gopt_sym_addr = 0;
+
+ gopt_graph_print_duration = 1;
+ gopt_graph_print_overhead = 1;
+ gopt_graph_print_abstime = 0;
+ gopt_graph_print_cpu = 1;
+ gopt_graph_print_proc = 0;
+ gopt_graph_print_overrun = 0;
+}
+
+static void set_clear_flag(const char *flag_name, int set)
+{
+ if (!strcmp(flag_name, "context_info"))
+ gopt_context_info = set;
+ else if (!strcmp(flag_name, "sym_offset"))
+ gopt_sym_offset = set;
+ else if (!strcmp(flag_name, "sym_addr"))
+ gopt_sym_addr = set;
+ else if (!strcmp(flag_name, "graph_print_duration"))
+ gopt_graph_print_duration = set;
+ else if (!strcmp(flag_name, "graph_print_overhead"))
+ gopt_graph_print_overhead = set;
+ else if (!strcmp(flag_name, "graph_print_abstime"))
+ gopt_graph_print_abstime = set;
+ else if (!strcmp(flag_name, "graph_print_cpu"))
+ gopt_graph_print_cpu = set;
+ else if (!strcmp(flag_name, "graph_print_proc"))
+ gopt_graph_print_proc = set;
+ else if (!strcmp(flag_name, "graph_print_overrun"))
+ gopt_graph_print_overrun = set;
+ /* invalid flage_name is omitted. */
+}
+
+static int tracer_no_event_context;
+static int ftrace_show_disabled;
+
+static void ftrace_show_function_graph_init(void);
+static void ftrace_show_function_init(void);
+static void ftrace_show_trace_event_init(void);
+
+static void ftrace_show_init(void)
+{
+ /* ftrace_event_get_id(), ftrace_event_get_pid() should not failed. */
+ if (!find_event_field(event_types[0], "common_type")) {
+ ftrace_show_disabled = 1;
+ return;
+ }
+
+ if (!find_event_field(event_types[0], "common_pid")) {
+ ftrace_show_disabled = 1;
+ return;
+ }
+
+ ftrace_show_function_init();
+ ftrace_show_function_graph_init();
+ ftrace_show_trace_event_init();
+}
+
+void show_event(struct format_context *fc)
+{
+ struct event_type *etype;
+ int id;
+
+ id = ftrace_event_get_id(fc->event.data);
+ etype = find_event_type(id);
+
+ if (!etype) {
+ event_printf("<Unknown event type>\n");
+ return;
+ }
+
+ if (!tracer_no_event_context && gopt_context_info)
+ event_context_print(etype, fc);
+ if (!etype->plugin)
+ event_printf("%s: ", etype->name);
+ etype->printer(etype, fc);
+}
+
+static int parse_cpulist(bool *cpulist, const char *cpulist_str, int len)
+{
+ unsigned a, b;
+ const char *s = cpulist_str;
+
+ memset(cpulist, 0, sizeof(bool) * len);
+
+ do {
+ if (!isdigit(*s))
+ return -1;
+ b = a = strtoul(s, (char **)&s, 10);
+ if (*s == '-') {
+ s++;
+ if (!isdigit(*s))
+ return -1;
+ b = strtoul(s, (char **)&s, 10);
+ }
+ if (!(a <= b))
+ return -1;
+ if (b >= len)
+ return -1;
+ while (a <= b) {
+ cpulist[a] = true;
+ a++;
+ }
+ if (*s == ',')
+ s++;
+ } while (*s != '\0' && *s != '\n');
+
+ return 0;
+}
+
+static void ftrace_show_function_graph_start(void);
+
+static void ftrace_show(int argc, char *argv[])
+{
+ int c;
+ bool *cpulist = NULL;
+
+ if (ftrace_show_disabled) {
+ fprintf(fp, "trace show is disabled.");
+ return;
+ }
+
+ set_all_flags_default();
+ ftrace_show_function_graph_start();
+
+ while ((c = getopt(argc, argv, "f:c:")) != EOF) {
+ switch(c)
+ {
+ case 'f':
+ if (optarg[0] == 'n' && optarg[1] == 'o')
+ set_clear_flag(optarg + 2, 0);
+ else
+ set_clear_flag(optarg, 1);
+ break;
+ case 'c':
+ if (cpulist)
+ goto err_arg;
+ cpulist = alloca(sizeof(bool) * kt->nr_cpu_ids);
+ if (parse_cpulist(cpulist, optarg, kt->nr_cpu_ids) < 0)
+ goto err_arg;
+ break;
+ default:
+ goto err_arg;
+ }
+ }
+
+ if (argc - optind != 0) {
+err_arg:
+ cmd_usage(pc->curcmd, SYNOPSIS);
+ return;
+ }
+
+ ring_buffer_stream_init(&format_context.stream, cpulist);
+
+ /* Ignore setjmp()'s return value, no special things to do. */
+ setjmp(show_event_env);
+
+ for (;;) {
+ show_event_pos = 0;
+ format_context.cpu = ring_buffer_stream_pop_event(
+ &format_context.stream, &format_context.event);
+ if (format_context.cpu < 0)
+ break;
+
+ show_event(&format_context);
+ fprintf(fp, "%s", show_event_buf);
+ }
+
+ ring_buffer_stream_destroy(&format_context.stream, cpulist);
+
+}
+
+void cmd_ftrace(void)
+{
+ if (ftrace_no_ftrace) {
+ fprintf(fp, "No tracing in this kernel\n");
+ return;
+ }
+
+ if (!ftrace_initialized) {
+ fprintf(fp, "failed to init tracing\n");
+ return;
+ }
+
+ if (argcnt == 1)
+ show_basic_info();
+ else if (!strcmp(args[1], "dump"))
+ ftrace_dump(argcnt - 1, args + 1);
+ else if (!strcmp(args[1], "show"))
+ ftrace_show(argcnt - 1, args + 1);
+ else
+ cmd_usage(pc->curcmd, SYNOPSIS);
+}
+
+static void event_default_print(struct event_type *t, struct format_context *fc)
+{
+ int i;
+
+ /* Skip the common types */
+ for (i = t->nfields - 6; i >= 0; i--) {
+ struct ftrace_field *f;
+ u64 value;
+
+ f = &t->fields[i];
+ value = f->op(f, fc->event.data);
+ event_printf("%s=", f->name);
+ event_field_print(f, value);
+ if (i)
+ event_printf(", ");
+ }
+
+ event_printf("\n");
+}
+
+static void sym_print(ulong sym, int opt_offset)
+{
+ if (!sym) {
+ event_printf("0");
+ } else {
+ ulong offset;
+ struct syment *se;
+
+ se = value_search(sym, &offset);
+ if (se) {
+ event_printf("%s", se->name);
+ if (opt_offset)
+ event_printf("+%lu", offset);
+ }
+ }
+}
+
+static void event_fn_print(struct event_type *t, struct format_context *fc)
+{
+ unsigned long ip = access_field(t, fc->event.data, "ip");
+ unsigned long parent_ip = access_field(t, fc->event.data, "parent_ip");
+
+ sym_print(ip, gopt_sym_offset);
+ if (gopt_sym_addr)
+ event_printf("<%lx>", ip);
+
+ event_printf(" <-");
+
+ sym_print(parent_ip, gopt_sym_offset);
+ if (gopt_sym_addr)
+ event_printf("<%lx>", parent_ip);
+
+ event_printf("\n");
+}
+
+static void ftrace_show_function_init(void)
+{
+ struct event_type *t = find_event_type_by_name("ftrace", "function");
+
+ if (t)
+ t->printer = event_fn_print;
+}
+
+#if 0
+/* simple */
+static void event_fn_entry_print(struct event_type *t, struct format_context *fc)
+{
+ ulong func = access_field(t, fc->event.data, "graph_ent.func");
+ int depth = access_field(t, fc->event.data, "graph_ent.depth");
+
+ event_printf("%*s", depth, " ");
+ sym_print(func, gopt_sym_offset);
+ if (gopt_sym_addr)
+ event_printf("<%lx>", func);
+ event_printf("() {");
+}
+
+static void event_fn_return_print(struct event_type *t, struct format_context *fc)
+{
+ ulong func = access_field(t, fc->event.data, "ret.func");
+ u64 calltime = access_field(t, fc->event.data, "ret.calltime");
+ u64 rettime = access_field(t, fc->event.data, "ret.rettime");
+ int depth = access_field(t, fc->event.data, "ret.depth");
+
+ event_printf("%*s} %lluns", depth, " ",
+ (unsigned long long)(rettime - calltime));
+}
+
+static void ftrace_show_function_graph_init(void)
+{
+ struct event_type *t1 = find_event_type_by_name(
+ "ftrace", "funcgraph_entry");
+ struct event_type *t2 = find_event_type_by_name(
+ "ftrace", "funcgraph_exit");
+
+ if (!t1 || !t2)
+ return;
+
+ t1->printer = event_fn_entry_print;
+ t2->printer = event_fn_return_print;
+}
+#endif
+
+
+#define TRACE_GRAPH_PROCINFO_LENGTH 14
+#define TRACE_GRAPH_INDENT 2
+
+static int max_bytes_for_cpu;
+static int *cpus_prev_pid;
+
+static int function_graph_entry_id;
+static int function_graph_return_id;
+static struct event_type *function_graph_entry_type;
+static struct event_type *function_graph_return_type;
+
+static void ftrace_show_function_graph_start(void)
+{
+ int i;
+
+ if (!cpus_prev_pid)
+ return;
+
+ for (i = 0; i < kt->nr_cpu_ids; i++)
+ cpus_prev_pid[i] = -1;
+}
+
+static void fn_graph_proc_print(int pid)
+{
+ int pid_strlen, comm_strlen;
+ char pid_str[20];
+ char comm[20] = "<...>";
+
+ pid_strlen = sprintf(pid_str, "%d", pid);
+ comm_strlen = TRACE_GRAPH_PROCINFO_LENGTH - 1 - pid_strlen;
+
+ get_comm_from_pid(pid, comm);
+ event_printf("%*.*s-%s", comm_strlen, comm_strlen, comm, pid_str);
+}
+
+/* If the pid changed since the last trace, output this event */
+static void fn_graph_proc_switch_print(int pid, int cpu)
+{
+ int prev_pid = cpus_prev_pid[cpu];
+
+ cpus_prev_pid[cpu] = pid;
+ if ((prev_pid == pid) || (prev_pid == -1))
+ return;
+
+/*
+ * Context-switch trace line:
+
+ ------------------------------------------
+ | 1) migration/0--1 => sshd-1755
+ ------------------------------------------
+
+ */
+
+ event_printf(" ------------------------------------------\n");
+ event_printf(" %*d) ", max_bytes_for_cpu, cpu);
+ fn_graph_proc_print(prev_pid);
+ event_printf(" => ");
+ fn_graph_proc_print(pid);
+ event_printf("\n ------------------------------------------\n\n");
+}
+
+/* Signal a overhead of time execution to the output */
+static void fn_graph_overhead_print(unsigned long long duration)
+{
+ const char *s = " ";
+
+ /* If duration disappear, we don't need anything */
+ if (!gopt_graph_print_duration)
+ return;
+
+ /* duration == -1 is for non nested entry or return */
+ if ((duration != -1) && gopt_graph_print_overhead) {
+ /* Duration exceeded 100 msecs */
+ if (duration > 100000ULL)
+ s = "! ";
+ /* Duration exceeded 10 msecs */
+ else if (duration > 10000ULL)
+ s = "+ ";
+ }
+
+ event_printf(s);
+}
+
+static void fn_graph_abstime_print(u64 ts)
+{
+ u64 time = ts / 1000;
+ unsigned long sec = time / 1000000;
+ unsigned long usec = time % 1000000;
+
+ event_printf("%5lu.%06lu | ", sec, usec);
+}
+
+static void fn_graph_irq_print(int type)
+{
+ /* TODO: implement it. */
+}
+
+static void fn_graph_duration_print(unsigned long long duration)
+{
+ /* log10(ULONG_MAX) + '\0' */
+ char msecs_str[21];
+ char nsecs_str[5];
+ int len;
+ unsigned long nsecs_rem = duration % 1000;
+
+ duration = duration / 1000;
+ len = sprintf(msecs_str, "%lu", (unsigned long) duration);
+
+ /* Print msecs */
+ event_printf("%s", msecs_str);
+
+ /* Print nsecs (we don't want to exceed 7 numbers) */
+ if (len < 7) {
+ snprintf(nsecs_str, 8 - len, "%03lu", nsecs_rem);
+ event_printf(".%s", nsecs_str);
+
+ len += strlen(nsecs_str);
+ }
+
+ if (len > 7)
+ len = 7;
+
+ event_printf(" us %*s| ", 7 - len, "");
+}
+
+/* Case of a leaf function on its call entry */
+static void fn_graph_entry_leaf_print(void *entry_data, void *exit_data)
+{
+ struct event_type *t = function_graph_return_type;
+
+ u64 calltime = access_field(t, exit_data, "ret.calltime");
+ u64 rettime = access_field(t, exit_data, "ret.rettime");
+ u64 duration = rettime - calltime;
+ int depth = access_field(t, exit_data, "ret.depth");
+ ulong func = access_field(t, exit_data, "ret.func");
+
+ fn_graph_overhead_print(duration);
+ if (gopt_graph_print_duration)
+ fn_graph_duration_print(duration);
+
+ event_printf("%*s", depth * TRACE_GRAPH_INDENT, "");
+ sym_print(func, 0);
+ event_printf("();\n");
+}
+
+static void fn_graph_entry_nested_print(struct event_type *t, void *data)
+{
+ int depth = access_field(t, data, "graph_ent.depth");
+ ulong func = access_field(t, data, "graph_ent.func");
+
+ fn_graph_overhead_print(-1);
+
+ /* No time */
+ if (gopt_graph_print_duration)
+ event_printf(" | ");
+
+ event_printf("%*s", depth * TRACE_GRAPH_INDENT, "");
+ sym_print(func, 0);
+ event_printf("() {\n");
+}
+
+static void fn_graph_prologue_print(int cpu, u64 ts, int pid, int type)
+{
+ fn_graph_proc_switch_print(pid, cpu);
+
+ if (type)
+ fn_graph_irq_print(type);
+
+ if (gopt_graph_print_abstime)
+ fn_graph_abstime_print(ts);
+
+ if (gopt_graph_print_cpu)
+ event_printf(" %*d) ", max_bytes_for_cpu, cpu);
+
+ if (gopt_graph_print_proc) {
+ fn_graph_proc_print(pid);
+ event_printf(" | ");
+ }
+}
+
+static void *get_return_for_leaf(struct event_type *t,
+ struct format_context *fc, void *curr_data)
+{
+ int cpu;
+ struct ftrace_event next;
+ ulong entry_func, exit_func;
+
+ cpu = ring_buffer_stream_pop_event(&fc->stream, &next);
+
+ if (cpu < 0)
+ goto not_leaf;
+
+ if (ftrace_event_get_id(next.data) != function_graph_return_id)
+ goto not_leaf;
+
+ if (ftrace_event_get_pid(curr_data) != ftrace_event_get_pid(next.data))
+ goto not_leaf;
+
+ entry_func = access_field(t, curr_data, "graph_ent.func");
+ exit_func = access_field(function_graph_return_type, next.data,
+ "ret.func");
+
+ if (entry_func != exit_func)
+ goto not_leaf;
+
+ return next.data;
+
+not_leaf:
+ ring_buffer_stream_push_current_event(&fc->stream);
+ return NULL;
+}
+
+static
+void event_fn_entry_print(struct event_type *t, struct format_context *fc)
+{
+ void *leaf_ret_data = NULL, *curr_data = fc->event.data, *data;
+ int pid = ftrace_event_get_pid(curr_data);
+
+ fn_graph_prologue_print(fc->cpu, fc->event.ts, pid, 1);
+
+ data = alloca(fc->event.length);
+ if (data) {
+ memcpy(data, fc->event.data, fc->event.length);
+ curr_data = data;
+ leaf_ret_data = get_return_for_leaf(t, fc, curr_data);
+ }
+
+ if (leaf_ret_data)
+ return fn_graph_entry_leaf_print(curr_data, leaf_ret_data);
+ else
+ return fn_graph_entry_nested_print(t, curr_data);
+}
+
+static
+void event_fn_return_print(struct event_type *t, struct format_context *fc)
+{
+ void *data = fc->event.data;
+ int pid = ftrace_event_get_pid(data);
+
+ u64 calltime = access_field(t, data, "ret.calltime");
+ u64 rettime = access_field(t, data, "ret.rettime");
+ u64 duration = rettime - calltime;
+ int depth = access_field(t, data, "ret.depth");
+
+ fn_graph_prologue_print(fc->cpu, fc->event.ts, pid, 0);
+ fn_graph_overhead_print(duration);
+
+ if (gopt_graph_print_duration)
+ fn_graph_duration_print(duration);
+
+ event_printf("%*s}\n", depth * TRACE_GRAPH_INDENT, "");
+
+ if (gopt_graph_print_overrun) {
+ unsigned long overrun = access_field(t, data, "ret.overrun");
+ event_printf(" (Overruns: %lu)\n", overrun);
+ }
+
+ fn_graph_irq_print(0);
+}
+
+static void ftrace_show_function_graph_init(void)
+{
+ if (strcmp(current_trace_name, "function_graph"))
+ return;
+
+ function_graph_entry_type = find_event_type_by_name(
+ "ftrace", "funcgraph_entry");
+ function_graph_return_type = find_event_type_by_name(
+ "ftrace", "funcgraph_exit");
+
+ if (!function_graph_entry_type || !function_graph_return_type)
+ return;
+
+ /*
+ * Because of get_return_for_leaf(), the exception handling
+ * of access_field() is not work for function_graph. So we need
+ * to ensure access_field() will not failed for these fields.
+ *
+ * I know these will not failed. I just ensure it.
+ */
+
+ if (!find_event_field(function_graph_entry_type, "graph_ent.func"))
+ return;
+
+ if (!find_event_field(function_graph_entry_type, "graph_ent.depth"))
+ return;
+
+ if (!find_event_field(function_graph_return_type, "ret.func"))
+ return;
+
+ if (!find_event_field(function_graph_return_type, "ret.calltime"))
+ return;
+
+ if (!find_event_field(function_graph_return_type, "ret.rettime"))
+ return;
+
+ if (!find_event_field(function_graph_return_type, "ret.overrun"))
+ return;
+
+ if (!find_event_field(function_graph_return_type, "ret.depth"))
+ return;
+
+ cpus_prev_pid = malloc(sizeof(int) * kt->nr_cpu_ids);
+ if (!cpus_prev_pid)
+ return;
+
+ max_bytes_for_cpu = snprintf(NULL, 0, "%d", kt->nr_cpu_ids - 1);
+
+ function_graph_entry_id = function_graph_entry_type->id;
+ function_graph_return_id = function_graph_return_type->id;
+
+ /* OK, set the printer for function_graph. */
+ tracer_no_event_context = 1;
+ function_graph_entry_type->printer = event_fn_entry_print;
+ function_graph_return_type->printer = event_fn_return_print;
+}
+
+static void event_sched_kthread_stop_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("task %s:%d\n",
+ (char *)(long)access_field(t, fc->event.data, "comm"),
+ (int)access_field(t, fc->event.data, "pid"));
+}
+
+static void event_sched_kthread_stop_ret_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("ret %d\n", (int)access_field(t, fc->event.data, "ret"));
+}
+
+static void event_sched_wait_task_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("task %s:%d [%d]\n",
+ (char *)(long)access_field(t, fc->event.data, "comm"),
+ (int)access_field(t, fc->event.data, "pid"),
+ (int)access_field(t, fc->event.data, "prio"));
+}
+
+static void event_sched_wakeup_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("task %s:%d [%d] success=%d\n",
+ (char *)(long)access_field(t, fc->event.data, "comm"),
+ (int)access_field(t, fc->event.data, "pid"),
+ (int)access_field(t, fc->event.data, "prio"),
+ (int)access_field(t, fc->event.data, "success"));
+}
+
+static void event_sched_wakeup_new_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("task %s:%d [%d] success=%d\n",
+ (char *)(long)access_field(t, fc->event.data, "comm"),
+ (int)access_field(t, fc->event.data, "pid"),
+ (int)access_field(t, fc->event.data, "prio"),
+ (int)access_field(t, fc->event.data, "success"));
+}
+
+static void event_sched_switch_print(struct event_type *t,
+ struct format_context *fc)
+{
+ char *prev_comm = (char *)(long)access_field(t, fc->event.data,
+ "prev_comm");
+ int prev_pid = access_field(t, fc->event.data, "prev_pid");
+ int prev_prio = access_field(t, fc->event.data, "prev_prio");
+
+ int prev_state = access_field(t, fc->event.data, "prev_state");
+
+ char *next_comm = (char *)(long)access_field(t, fc->event.data,
+ "next_comm");
+ int next_pid = access_field(t, fc->event.data, "next_pid");
+ int next_prio = access_field(t, fc->event.data, "next_prio");
+
+ event_printf("task %s:%d [%d] (", prev_comm, prev_pid, prev_prio);
+
+ if (prev_state == 0) {
+ event_printf("R");
+ } else {
+ if (prev_state & 1)
+ event_printf("S");
+ if (prev_state & 2)
+ event_printf("D");
+ if (prev_state & 4)
+ event_printf("T");
+ if (prev_state & 8)
+ event_printf("t");
+ if (prev_state & 16)
+ event_printf("Z");
+ if (prev_state & 32)
+ event_printf("X");
+ if (prev_state & 64)
+ event_printf("x");
+ if (prev_state & 128)
+ event_printf("W");
+ }
+
+ event_printf(") ==> %s:%d [%d]\n", next_comm, next_pid, next_prio);
+}
+
+static void event_sched_migrate_task_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("task %s:%d [%d] from: %d to: %d\n",
+ (char *)(long)access_field(t, fc->event.data, "comm"),
+ (int)access_field(t, fc->event.data, "pid"),
+ (int)access_field(t, fc->event.data, "prio"),
+ (int)access_field(t, fc->event.data, "orig_cpu"),
+ (int)access_field(t, fc->event.data, "dest_cpu"));
+}
+
+static void event_sched_process_free_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("task %s:%d [%d]\n",
+ (char *)(long)access_field(t, fc->event.data, "comm"),
+ (int)access_field(t, fc->event.data, "pid"),
+ (int)access_field(t, fc->event.data, "prio"));
+}
+
+static void event_sched_process_exit_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("task %s:%d [%d]\n",
+ (char *)(long)access_field(t, fc->event.data, "comm"),
+ (int)access_field(t, fc->event.data, "pid"),
+ (int)access_field(t, fc->event.data, "prio"));
+}
+
+static void event_sched_process_wait_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("task %s:%d [%d]\n",
+ (char *)(long)access_field(t, fc->event.data, "comm"),
+ (int)access_field(t, fc->event.data, "pid"),
+ (int)access_field(t, fc->event.data, "prio"));
+}
+
+static void event_sched_process_fork_print(struct event_type *t,
+ struct format_context *fc)
+{
+ char *parent_comm = (char *)(long)access_field(t, fc->event.data,
+ "parent_comm");
+ int parent_pid = access_field(t, fc->event.data, "parent_pid");
+
+ char *child_comm = (char *)(long)access_field(t, fc->event.data,
+ "child_comm");
+ int child_pid = access_field(t, fc->event.data, "child_pid");
+
+ event_printf("parent %s:%d child %s:%d\n", parent_comm, parent_pid,
+ child_comm, child_pid);
+}
+
+static void event_sched_signal_send_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("sig: %d task %s:%d\n",
+ (int)access_field(t, fc->event.data, "sig"),
+ (char *)(long)access_field(t, fc->event.data, "comm"),
+ (int)access_field(t, fc->event.data, "pid"));
+}
+
+static void event_kmalloc_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu "
+ "gfp_flags=%lx\n",
+ (long)access_field(t, fc->event.data, "call_site"),
+ (void *)(long)access_field(t, fc->event.data, "ptr"),
+ (size_t)access_field(t, fc->event.data, "bytes_req"),
+ (size_t)access_field(t, fc->event.data, "bytes_alloc"),
+ (long)access_field(t, fc->event.data, "gfp_flags"));
+}
+
+static void event_kmem_cache_alloc_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu "
+ "gfp_flags=%lx\n",
+ (long)access_field(t, fc->event.data, "call_site"),
+ (void *)(long)access_field(t, fc->event.data, "ptr"),
+ (size_t)access_field(t, fc->event.data, "bytes_req"),
+ (size_t)access_field(t, fc->event.data, "bytes_alloc"),
+ (long)access_field(t, fc->event.data, "gfp_flags"));
+}
+
+static void event_kmalloc_node_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu "
+ "gfp_flags=%lx node=%d\n",
+ (long)access_field(t, fc->event.data, "call_site"),
+ (void *)(long)access_field(t, fc->event.data, "ptr"),
+ (size_t)access_field(t, fc->event.data, "bytes_req"),
+ (size_t)access_field(t, fc->event.data, "bytes_alloc"),
+ (long)access_field(t, fc->event.data, "gfp_flags"),
+ (int)access_field(t, fc->event.data, "node"));
+}
+
+static void event_kmem_cache_alloc_node_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu "
+ "gfp_flags=%lx node=%d\n",
+ (long)access_field(t, fc->event.data, "call_site"),
+ (void *)(long)access_field(t, fc->event.data, "ptr"),
+ (size_t)access_field(t, fc->event.data, "bytes_req"),
+ (size_t)access_field(t, fc->event.data, "bytes_alloc"),
+ (long)access_field(t, fc->event.data, "gfp_flags"),
+ (int)access_field(t, fc->event.data, "node"));
+}
+
+static void event_kfree_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("call_site=%lx ptr=%p\n",
+ (long)access_field(t, fc->event.data, "call_site"),
+ (void *)(long)access_field(t, fc->event.data, "ptr"));
+}
+
+static void event_kmem_cache_free_print(struct event_type *t,
+ struct format_context *fc)
+{
+ event_printf("call_site=%lx ptr=%p\n",
+ (long)access_field(t, fc->event.data, "call_site"),
+ (void *)(long)access_field(t, fc->event.data, "ptr"));
+}
+
+static void event_workqueue_insertion_print(struct event_type *t,
+ struct format_context *fc)
+{
+ char *thread_comm = (char *)(long)access_field(t, fc->event.data,
+ "thread_comm");
+ int thread_pid = access_field(t, fc->event.data, "thread_pid");
+ ulong func = access_field(t, fc->event.data, "func");
+
+ event_printf("thread=%s:%d func=", thread_comm, thread_pid);
+ sym_print(func, 1);
+ event_printf("\n");
+}
+
+static void event_workqueue_execution_print(struct event_type *t,
+ struct format_context *fc)
+{
+ char *thread_comm = (char *)(long)access_field(t, fc->event.data,
+ "thread_comm");
+ int thread_pid = access_field(t, fc->event.data, "thread_pid");
+ ulong func = access_field(t, fc->event.data, "func");
+
+ event_printf("thread=%s:%d func=", thread_comm, thread_pid);
+ sym_print(func, 1);
+ event_printf("\n");
+}
+
+static void event_workqueue_creation_print(struct event_type *t,
+ struct format_context *fc)
+{
+ char *thread_comm = (char *)(long)access_field(t, fc->event.data,
+ "thread_comm");
+ int thread_pid = access_field(t, fc->event.data, "thread_pid");
+ int cpu = access_field(t, fc->event.data, "cpu");
+
+ event_printf("thread=%s:%d cpu=%d\n", thread_comm, thread_pid, cpu);
+}
+
+static void event_workqueue_destruction_print(struct event_type *t,
+ struct format_context *fc)
+{
+ char *thread_comm = (char *)(long)access_field(t, fc->event.data,
+ "thread_comm");
+ int thread_pid = access_field(t, fc->event.data, "thread_pid");
+
+ event_printf("thread=%s:%d\n", thread_comm, thread_pid);
+}
+
+static void ftrace_show_trace_event_init(void)
+{
+#define init_trace_event(system, name) \
+do { \
+ struct event_type *t = find_event_type_by_name(#system, #name); \
+ if (t) \
+ t->printer = event_ ## name ## _print; \
+} while (0)
+
+ init_trace_event(sched, sched_kthread_stop);
+ init_trace_event(sched, sched_kthread_stop_ret);
+ init_trace_event(sched, sched_wait_task);
+ init_trace_event(sched, sched_wakeup);
+ init_trace_event(sched, sched_wakeup_new);
+ init_trace_event(sched, sched_switch);
+ init_trace_event(sched, sched_migrate_task);
+ init_trace_event(sched, sched_process_free);
+ init_trace_event(sched, sched_process_exit);
+ init_trace_event(sched, sched_process_wait);
+ init_trace_event(sched, sched_process_fork);
+ init_trace_event(sched, sched_signal_send);
+
+ init_trace_event(kmem, kmalloc);
+ init_trace_event(kmem, kmem_cache_alloc);
+ init_trace_event(kmem, kmalloc_node);
+ init_trace_event(kmem, kmem_cache_alloc_node);
+ init_trace_event(kmem, kfree);
+ init_trace_event(kmem, kmem_cache_free);
+
+ init_trace_event(workqueue, workqueue_insertion);
+ init_trace_event(workqueue, workqueue_execution);
+ init_trace_event(workqueue, workqueue_creation);
+ init_trace_event(workqueue, workqueue_destruction);
+#undef init_trace_event
+}
+
diff --git a/global_data.c b/global_data.c
index 581deb2..2c14d69 100755
--- a/global_data.c
+++ b/global_data.c
@@ -103,6 +103,7 @@ struct command_table_entry linux_command_table[] = {
{"runq", cmd_runq, help_runq, REFRESH_TASK_TABLE},
{"search", cmd_search, help_search, 0},
{"set", cmd_set, help_set, REFRESH_TASK_TABLE},
+ {"trace", cmd_ftrace, help_ftrace, 0},
{"sig", cmd_sig, help_sig, REFRESH_TASK_TABLE},
{"struct", cmd_struct, help_struct, 0},
{"swap", cmd_swap, help_swap, 0},
diff --git a/help.c b/help.c
index 5f0189f..f8ddb84 100755
--- a/help.c
+++ b/help.c
@@ -2899,6 +2899,39 @@ char *help_task[] = {
NULL
};
+char *help_ftrace[] = {
+"trace",
+"show or dump the tracing info",
+"[ <show [-c <cpulist>] [-f [no]<flagname>]> | <dump [-sm] <dest-dir>> ]",
+"trace",
+" shows the current tracer and other informations.",
+"",
+"trace show [ -c <cpulist> ] [ -f [no]<flagename> ]",
+" shows all events with readability text(sorted by timestamp)",
+" -c: only shows specified CPUs' events.",
+" ex. trace show -c 1,2 - only shows cpu#1 and cpu#2 's events.",
+" trace show -c 0,2-7 - only shows cpu#0, cpu#2...cpu#7's events.",
+" -f: set or clear a flag",
+" available flags default",
+" context_info true",
+" sym_offset false",
+" sym_addr false",
+" graph_print_duration true",
+" graph_print_overhead true",
+" graph_print_abstime false",
+" graph_print_cpu true",
+" graph_print_proc false",
+" graph_print_overrun false",
+"",
+"trace dump [-sm] <dest-dir>",
+" dump ring_buffers to dest-dir. Then you can parse it",
+" by other tracing tools. The dirs and files are generated",
+" the same as debugfs/tracing.",
+" -m: also dump metadata of ftrace.",
+" -s: also dump symbols of the kernel <not implemented>.",
+NULL
+};
+
char *help_sig[] = {
"sig",
"task signal handling",
diff --git a/kernel.c b/kernel.c
index 603b6e9..dd4563d 100755
--- a/kernel.c
+++ b/kernel.c
@@ -132,6 +132,14 @@ kernel_init()
} else
kt->cpus = 1;
+ if (symbol_exists("nr_cpu_ids"))
+ get_symbol_data("nr_cpu_ids", sizeof(int), &kt->nr_cpu_ids);
+ else
+ kt->nr_cpu_ids = 1;
+
+ if (kt->cpus < kt->nr_cpu_ids)
+ kt->cpus = kt->nr_cpu_ids;
+
if ((sp1 = symbol_search("__per_cpu_start")) &&
(sp2 = symbol_search("__per_cpu_end")) &&
(sp1->type == 'A' || sp1->type == 'D') &&
diff --git a/main.c b/main.c
index 5d79eef..9831539 100755
--- a/main.c
+++ b/main.c
@@ -516,6 +516,7 @@ main_loop(void)
net_init();
dev_init();
machdep_init(POST_INIT);
+ ftrace_init();
}
} else
SIGACTION(SIGINT, restart, &pc->sigaction, NULL);
14 years, 12 months
- 6
- 9
Ramin SHARIATIAN est absent(e).
by ramin.shariatian＠ineo.com
Je serai absent(e) à partir du 07/09/2009 de retour le 28/09/2009.
Je répondrai à votre message dès mon retour.
15 years
- 1
- 0
[ANNOUNCE] crash version 4.0.9 is available
by Dave Anderson
- Versioning has been changed such that the crash-<version>.tar.gz
file no longer contains a "-" in the <version> number, and the
crash-<version>-0.src.rpm will always have a crash.spec release
number of "0". When the crash binary is built from the src.rpm file,
the "-0" will not be included/displayed as part of the crash binary's
version number, so that it will match the crash binary version that
is built from the crash-<version>.tar.gz file. This is being done
so that distributors can take the crash-<version>.tar.gz file
and append their own crash.spec file release numbering scheme onto
the base <version> number when creating their own src.rpm package.
(anderson(a)redhat.com)
- Wholesale replacement of the x86/x86_64 disassembly code in the
embedded gdb-6.1 module to that used in gdb-6.8. The primary motive
is for CONFIG_FUNCTION_TRACER kernels, which contain a 5-byte nopl
instructions that can be overwritten during runtime for dynamic
ftracing. That particular nop format was not recognized by the older
disassembly code in gdb-6.1, and printed a "(bad)" instruction
followed by a incorrect "add" instruction. For example, without the
patch, the instructions at sys_write+11 and sys_write+13 below are
not correct:
crash> dis sys_write
0xffffffff8113c56b <sys_write>: push %rbp
0xffffffff8113c56c <sys_write+1>: mov %rsp,%rbp
0xffffffff8113c56f <sys_write+4>: push %r12
0xffffffff8113c571 <sys_write+6>: push %rbx
0xffffffff8113c572 <sys_write+7>: sub $0x30,%rsp
0xffffffff8113c576 <sys_write+11>: (bad)
0xffffffff8113c578 <sys_write+13>: add %r8b,(%rax)
0xffffffff8113c57b <sys_write+16>: mov %rsi,%r12
...
With the patch, the 5-byte instruction is properly translated:
crash> dis sys_write
0xffffffff8113c56b <sys_write>: push %rbp
0xffffffff8113c56c <sys_write+1>: mov %rsp,%rbp
0xffffffff8113c56f <sys_write+4>: push %r12
0xffffffff8113c571 <sys_write+6>: push %rbx
0xffffffff8113c572 <sys_write+7>: sub $0x30,%rsp
0xffffffff8113c576 <sys_write+11>: nopl 0x0(%rax,%rax,1)
0xffffffff8113c57b <sys_write+16>: mov %rsi,%r12
...
There are other side-effects/changes such as the output of negative
relative offsets from registers. For example, without the patch,
instructions like this:
mov 0xffffffffffffffc8(%rbp),%rdx
are displayed in an easier-to-understand format:
mov -0x38(%rbp),%rdx
There are undoubtedly other subtle changes as well.
(anderson(a)redhat.com)
- Fix for compressed diskdump/kdump vmcores to properly handle
page descriptor structures that are located beyond a 4GB file
offset in the vmcore file.
(oomichi(a)mxs.nes.nec.co.jp)
- Fix for x86_64 "bt" command to properly recognize vsyscall FIXMAP
virtual addresses when encountered as the RIP in an exception frame.
Without the patch, the exception frame would be followed by the
warning message: "bt: WARNING: possibly bogus exception frame".
(anderson(a)redhat.com)
- Fix for the "sym <address>" command option when the address
references a symbol in the vsyscall FIXMAP virtual address page
in certain x86_64 kernel versions. Without the patch, the command
would fail with a "symbol not found" message. This would also affect
commands that perform symbolic translations of virtual addresses,
such as "rd -s".
(anderson(a)redhat.com)
- Fix for the x86_64 "bt" command that may possibly start the backtrace
of an active non-crashing task on its per-cpu IRQ stack instead of
starting from the NMI exception stack. This could only occur on
a kdump-generated vmcore, and as a result, the backtrace would make
a faulty transition back to the process stack, dump a bogus exception
frame, and display: "bt: WARNING: possibly bogus exception frame".
(anderson(a)redhat.com)
- Fix for the x86_64 "bt" command in determining the frame just above
an IRQ interrupt exception frame, or above an exception frame that
gets handled on the process stack, such as a page fault. Without
the patch, the frame size of the interrupted function was being
incorrectly calculated, and could result in the display of an invalid
stale frame just above the exception frame register dump.
(anderson(a)redhat.com)
- Fix for the x86_64 "bt" command's frame size calculating mechanism
to differentiate between text return addresses and the precise text
RIP address of an exception. Without the patch, the instruction of
the text return address location was being incorrectly scanned for
instructions that modify the frame size, and could result in the
skipping of a stack frame.
(anderson(a)redhat.com)
- Fix for usage of a System.map file argument with 2.6.30 and later
kernels (which only should be done if the vmlinux file does not match
the vmcore or live system being analyzed). Without the patch there
may be several hundred "crash: symbol count overflow (trace_kmalloc)"
messages displayed during the back-patching of the gdb minimal_symbol
table phase.
(anderson(a)redhat.com)
- Fix for usage of a System.map file argument whose symbol list does
not contain an "_end" symbol. Without the patch, the crash session
fails during initialization with the error message: "crash: cannot
resolve _end".
(anderson(a)redhat.com)
- Fix for "kmem -p <address>" or "kmem <address>" options when the
<address> is not a page structure address. Without the patch,
starting with crash version 4.0-8.11, harmless but annoying "kmem:
WARNING: sparsemem: invalid section number: 8192" messages would be
displayed as a result of this patch.
(anderson(a)redhat.com)
- Fix for the snap.so extension module when run on pre-2.6.13 x86_64
kernels with more than 4GB of physical memory. Without the patch,
the resultant vmcore would not include memory above 4GB because
the /proc/iomem file did not display it. A typical crash session
would fail during initialization with an error message such as
"crash: read error: kernel virtual address: 1020009d024 type:
tss_struct ist array".
(anderson(a)redhat.com)
- Fix for the build of the sial.so extension module if /usr/bin/bison
and /usr/bin/flex do not exist on the host build system. When those
files do not exist, the build of sial.so generates a huge number of
error messages, ending with "make[3]: [sial.so] Error 1 (ignored)".
Since it is preferable to avoid extra BuildRequires entries in the
crash.spec file for extension modules, and given that it is often
built from a tar.gz installation, the failed build will indicate:
"sial.so: build failed: requires /usr/bin/flex and /usr/bin/bison".
(anderson(a)redhat.com)
- Fix for the build of the snap.so extension module on older systems
running with "make" versions 3.80 or earlier. Without the patch,
the build of snap.so would fail like so:
snap.mk:4: Extraneous text after `else' directive
snap.mk:7: Extraneous text after `else' directive
snap.mk:7: *** only one `else' per conditional. Stop.
make[2]: [snap.so] Error 2 (ignored)
The snap.mk file has been modified to conform to the older format.
(anderson(a)redhat.com)
- Fix for the "rd" and "vtop" commands on RHEL4 x86_64 Xen paravirtual
kernels in the reading or translation of vmalloc addresses that are
not in kernel module vmalloc address space. In that kernel version
(and none other that I am aware of), the PAGE_OFFSET unity-map kernel
virtual address of 0xffffff8000000000 is larger than the address of
its VMALLOC_START, 0xffffff0000000000. Because of that, without the
patch, "rd" would fail with the error message "rd: invalid user
virtual address: <address> type: 64-bit UVADDR", "vtop" would
fail with the error message "vtop: ambiguous address: <address>
(requires -u or -k)", and "vtop -k" would incorrectly report that
the <address> was "(not a kernel virtual address)".
(anderson(a)redhat.com)
- Implemented a new "-x" command line option that will automatically
load extension modules from a particular directory. The search for
the extension module directory will be done in the following order,
and the first one (if any) that exists will be selected as the
target directory:
1. the directory specified in the CRASH_EXTENSIONS shell
environment variable
2. /usr/lib64/crash/extensions (64-bit architectures)
3. /usr/lib/crash/extensions
4. ./extensions
All extension modules that are found in the target directory will
be loaded automatically.
(anderson(a)redhat.com)
Download from: http://people.redhat.com/anderson
15 years
- 1
- 0
Re: [Crash-utility] snap crash plugin on RHEL 4
by Dave Anderson
----- "Dave Anderson" <anderson(a)redhat.com> wrote:
> So this does appear (unless anybody can show me evidence otherwise)
> to be a RHEL4 (2.6.9-ish) issue only?
>
> Dave
>
So anyway -- back to Adrien -- for now, apply this patch, and hopefully
things should work OK:
--- extensions/snap.c.orig
+++ extensions/snap.c
@@ -120,8 +120,8 @@ cmd_snap(void)
nt = &vt->node_table[n];
paddr = nt->start_paddr;
for (c = 0; c < nt->size; c++, paddr += PAGESIZE()) {
- if (!verify_paddr(paddr))
- continue;
+// if (!verify_paddr(paddr))
+// continue;
if (!readmem(paddr, PHYSADDR, &buf[0], PAGESIZE(),
"memory page", QUIET|RETURN_ON_ERROR))
continue;
Dave
15 years
- 2
- 2
Re: [Crash-utility] snap crash plugin on RHEL 4
by Dave Anderson
----- "Dave Anderson" <anderson(a)redhat.com> wrote:
> ----- "Adrien Kunysz" <adk(a)redhat.com> wrote:
>
> > > When the vmcore is created by "snap", it first looks at /proc/iomem for
> > > the regions of physical memory that are dumpable. Therefore it rejected
> > > any physical address above f7feffff, which is the problem at hand.
>
> >
> >
> > f7ff0000-f7ffefff : ACPI Tables
> > f7fff000-f7ffffff : ACPI Non-volatile Storage
> >
> > > Just for sanity's sake, what does "cat /proc/iomem" show?
> >
> > 00000000-00099bff : System RAMcat
> > 00099c00-0009ffff : reserved
> > 000a0000-000bffff : Video RAM area
> > 000c0000-000c9fff : Video ROM
> > 000ca000-000cafff : Adapter ROM
> > 000cb000-000cbfff : Adapter ROM
> > 000cc000-000ccfff : Adapter ROM
> > 000cd000-000cdfff : Adapter ROM
> > 000ce000-000cefff : Adapter ROM
> > 000cf000-000d4bff : Adapter ROM
> > 000f0000-000fffff : System ROM
> > 00100000-f7feffff : System RAM
> > 00100000-00318afa : Kernel code
> > 00318afb-00469ec0 : Kernel data
> > f7ff0000-f7ffefff : ACPI Tables
> > f7fff000-f7ffffff : ACPI Non-volatile Storage
> > fbf00000-fbffffff : PCI Bus #01
> > fbf80000-fbf9ffff : 0000:01:02.1
> > fbf80000-fbf9ffff : e1000
> > fbfa0000-fbfbffff : 0000:01:02.0
> > fbfa0000-fbfbffff : e1000
> > fbfc0000-fbfdffff : 0000:01:01.1
> > fbfc0000-fbfdffff : e1000
> > fbfe0000-fbffffff : 0000:01:01.0
> > fbfe0000-fbffffff : e1000
> > fc000000-fc4fffff : PCI Bus #02
> > fc4e0000-fc4effff : 0000:02:03.0
> > fc4fc000-fc4fffff : 0000:02:03.0
> > fc500000-fe5fffff : PCI Bus #03
> > fd000000-fdffffff : 0000:03:03.0
> > fe5fd000-fe5fdfff : 0000:03:00.1
> > fe5fd000-fe5fdfff : ohci_hcd
> > fe5fe000-fe5fefff : 0000:03:00.0
> > fe5fe000-fe5fefff : ohci_hcd
> > fe5ff000-fe5fffff : 0000:03:03.0
> > fe6fe000-fe6fefff : 0000:00:02.1
> > fe6ff000-fe6fffff : 0000:00:01.1
> > fe700000-fe7fffff : PCI Bus #01
> > fe800000-fe8fffff : PCI Bus #02
> > feafe000-feafefff : 0000:04:02.1
> > feaff000-feafffff : 0000:04:01.1
> > ff700000-ffffffff : reserved
>
> Apparently I don't understand /proc/iomem -- I was under the
> assumption that it would show all "System RAM" segments. Is
> that not the case?
Damn. In RHEL4, when creating the "System RAM" resource segments,
it does this:
void __init e820_reserve_resources(void)
{
int i;
for (i = 0; i < e820.nr_map; i++) {
struct resource *res;
if (e820.map[i].addr + e820.map[i].size > 0x100000000ULL)
continue;
res = alloc_bootmem_low(sizeof(struct resource));
switch (e820.map[i].type) {
case E820_RAM: res->name = "System RAM"; break;
case E820_ACPI: res->name = "ACPI Tables"; break;
case E820_NVS: res->name = "ACPI Non-volatile Storage"; break;
default: res->name = "reserved";
}
...
and so doesn't bother with anything above 4GB.
RHEL5 seems to accept anything:
void __init e820_reserve_resources(void)
{
int i;
for (i = 0; i < e820.nr_map; i++) {
struct resource *res;
res = alloc_bootmem_low(sizeof(struct resource));
switch (e820.map[i].type) {
case E820_RAM: res->name = "System RAM"; break;
case E820_ACPI: res->name = "ACPI Tables"; break;
case E820_NVS: res->name = "ACPI Non-volatile Storage"; break;
case E820_RUNTIME_CODE: res->name = "EFI runtime code"; break;
default: res->name = "reserved";
}
...
And upstream makes it configurable based upon CONFIG_PHYS_ADDR_T_64BIT,
so it should work OK:
#ifdef CONFIG_PHYS_ADDR_T_64BIT
typedef u64 phys_addr_t;
#else
typedef u32 phys_addr_t;
#endif
typedef phys_addr_t resource_size_t;
static struct resource __initdata *e820_res;
void __init e820_reserve_resources(void)
{
int i;
struct resource *res;
u64 end;
res = alloc_bootmem_low(sizeof(struct resource) * e820.nr_map);
e820_res = res;
for (i = 0; i < e820.nr_map; i++) {
end = e820.map[i].addr + e820.map[i].size - 1;
if (end != (resource_size_t)end) {
res++;
continue;
}
...
So this does appear (unless anybody can show me evidence otherwise)
to be a RHEL4 (2.6.9-ish) issue only?
Dave
15 years
- 1
- 0
Re: [Crash-utility] snap crash plugin on RHEL 4
by Dave Anderson
----- "Adrien Kunysz" <adk(a)redhat.com> wrote:
> > When the vmcore is created by "snap", it first looks at /proc/iomem for
> > the regions of physical memory that are dumpable. Therefore it rejected
> > any physical address above f7feffff, which is the problem at hand.
>
>
> f7ff0000-f7ffefff : ACPI Tables
> f7fff000-f7ffffff : ACPI Non-volatile Storage
>
> > Just for sanity's sake, what does "cat /proc/iomem" show?
>
> 00000000-00099bff : System RAMcat
> 00099c00-0009ffff : reserved
> 000a0000-000bffff : Video RAM area
> 000c0000-000c9fff : Video ROM
> 000ca000-000cafff : Adapter ROM
> 000cb000-000cbfff : Adapter ROM
> 000cc000-000ccfff : Adapter ROM
> 000cd000-000cdfff : Adapter ROM
> 000ce000-000cefff : Adapter ROM
> 000cf000-000d4bff : Adapter ROM
> 000f0000-000fffff : System ROM
> 00100000-f7feffff : System RAM
> 00100000-00318afa : Kernel code
> 00318afb-00469ec0 : Kernel data
> f7ff0000-f7ffefff : ACPI Tables
> f7fff000-f7ffffff : ACPI Non-volatile Storage
> fbf00000-fbffffff : PCI Bus #01
> fbf80000-fbf9ffff : 0000:01:02.1
> fbf80000-fbf9ffff : e1000
> fbfa0000-fbfbffff : 0000:01:02.0
> fbfa0000-fbfbffff : e1000
> fbfc0000-fbfdffff : 0000:01:01.1
> fbfc0000-fbfdffff : e1000
> fbfe0000-fbffffff : 0000:01:01.0
> fbfe0000-fbffffff : e1000
> fc000000-fc4fffff : PCI Bus #02
> fc4e0000-fc4effff : 0000:02:03.0
> fc4fc000-fc4fffff : 0000:02:03.0
> fc500000-fe5fffff : PCI Bus #03
> fd000000-fdffffff : 0000:03:03.0
> fe5fd000-fe5fdfff : 0000:03:00.1
> fe5fd000-fe5fdfff : ohci_hcd
> fe5fe000-fe5fefff : 0000:03:00.0
> fe5fe000-fe5fefff : ohci_hcd
> fe5ff000-fe5fffff : 0000:03:03.0
> fe6fe000-fe6fefff : 0000:00:02.1
> fe6ff000-fe6fffff : 0000:00:01.1
> fe700000-fe7fffff : PCI Bus #01
> fe800000-fe8fffff : PCI Bus #02
> feafe000-feafefff : 0000:04:02.1
> feaff000-feafffff : 0000:04:01.1
> ff700000-ffffffff : reserved
Apparently I don't understand /proc/iomem -- I was under the
assumption that it would show all "System RAM" segments. Is
that not the case?
Dave
15 years
- 1
- 0
Re: [Crash-utility] snap crash plugin on RHEL 4
by Dave Anderson
----- "Adrien Kunysz" <adk(a)redhat.com> wrote:
> Dear crash-utility list,
>
> I played a bit with snap on RHEL 4 and besides the fact it doesn't build out of
> the box (trivial Makefile compatibility problem), it seems it doesn't really
> dump a full core properly (at least on the system I tested).
>
> Since this is not really something that is supposed to be supported I am posting
> this here rather than opening a Bugzilla. I haven't attempted to repro on other
> distros.
>
> # crash
> crash> extend snap-rhel4-x86_64/snap.so
> ./snap-rhel4-x86_64/snap.so: shared object loaded
> crash> snap mycore
> mycore: [100%]
> -rw-r--r-- 1 root root 4160684848 Sep 3 09:37 mycore
> crash> quit
> # free
> total used free shared buffers
> cached
> Mem: 16319168 8065516 8253652 0 133060
> 6231128
> -/+ buffers/cache: 1701328 14617840
> Swap: 2097144 0 2097144
> # uname -a
> Linux *** 2.6.9-89.ELsmp #1 SMP Mon Apr 20 10:33:05 EDT 2009 x86_64
> x86_64
> x86_64 GNU/Linux
> # crash /usr/lib/debug/lib/modules/2.6.9-89.ELsmp/vmlinux mycore
> [...]
> crash: read error: kernel virtual address: 1020009d024 type:
> "tss_struct ist array"
>
> Is that expected? Any idea what's going on?
It created at 4GB vmcore on a 16GB system, which is apparently the
problem. Try doing this (done on my 1GB RHEL4 box):
crash> !tty
/dev/pts/3
crash> set console /dev/pts/3
debug console [11505]: /dev/pts/3
console: /dev/pts/3
crash> extend snap.so
./extensions/snap.so: shared object loaded
crash> snap mycore
00000000-0009ffff : System RAM
00100000-3fe8abff : System RAM
ram_segments[0]: 0000000000000000 00000000000a0000 [00000000-0009ffff]
ram_segments[1]: 0000000000100000 000000003fe8a000 [00100000-3fe8abff]
mycore: [100%]
-rw-r--r-- 1 root root 1072210680 Sep 3 09:24 mycore
crash>
I'm guessing that the memory containing virtual address 0x1020009d024
(physical 0x20009d024) is not there for some reason.
Dave
15 years
- 2
- 3