Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
Merge commit. Changes below are compared with the first parent: 7a797cdc.
Changes
28 files changed · +856 −518
Only the first 600 diff lines are shown. Download the complete patch.
Documentation/kernel-parameters.txt
View filediff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1d28812..51138b3 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -778,6 +778,13 @@ and is between 256 and 4096 characters. It is defined in the file
by the set_ftrace_notrace file in the debugfs
tracing directory.
+ ftrace_graph_filter=[function-list]
+ [FTRACE] Limit the top level callers functions traced
+ by the function graph tracer at boot up.
+ function-list is a comma separated list of functions
+ that can be changed at run time by the
+ set_graph_function file in the debugfs tracing directory.
+
gamecon.map[2|3]=
[HW,JOY] Multisystem joystick and NES/SNES/PSX pad
support via parallel port (up to 5 devices per port)
Documentation/trace/ftrace-design.txt
View filediff --git a/Documentation/trace/ftrace-design.txt b/Documentation/trace/ftrace-design.txt
index 7003e10..641a1ef 100644
--- a/Documentation/trace/ftrace-design.txt
+++ b/Documentation/trace/ftrace-design.txt
@@ -213,10 +213,19 @@ If you can't trace NMI functions, then skip this option.
<details to be filled>
-HAVE_FTRACE_SYSCALLS
+HAVE_SYSCALL_TRACEPOINTS
---------------------
-<details to be filled>
+You need very few things to get the syscalls tracing in an arch.
+
+- Have a NR_syscalls variable in <asm/unistd.h> that provides the number
+ of syscalls supported by the arch.
+- Implement arch_syscall_addr() that resolves a syscall address from a
+ syscall number.
+- Support the TIF_SYSCALL_TRACEPOINT thread flags
+- Put the trace_sys_enter() and trace_sys_exit() tracepoints calls from ptrace
+ in the ptrace syscalls tracing path.
+- Tag this arch as HAVE_SYSCALL_TRACEPOINTS.
HAVE_FTRACE_MCOUNT_RECORD
Makefile
View filediff --git a/Makefile b/Makefile
index f5cdb72..33d4732 100644
--- a/Makefile
+++ b/Makefile
@@ -379,6 +379,7 @@ export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exc
PHONY += scripts_basic
scripts_basic:
$(Q)$(MAKE) $(build)=scripts/basic
+ $(Q)rm -f .tmp_quiet_recordmcount
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;
arch/s390/kernel/ftrace.c
View filediff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index f5fe34d..5a82bc6 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -203,73 +203,10 @@ out:
#ifdef CONFIG_FTRACE_SYSCALLS
-extern unsigned long __start_syscalls_metadata[];
-extern unsigned long __stop_syscalls_metadata[];
extern unsigned int sys_call_table[];
-static struct syscall_metadata **syscalls_metadata;
-
-struct syscall_metadata *syscall_nr_to_meta(int nr)
-{
- if (!syscalls_metadata || nr >= NR_syscalls || nr < 0)
- return NULL;
-
- return syscalls_metadata[nr];
-}
-
-int syscall_name_to_nr(char *name)
-{
- int i;
-
- if (!syscalls_metadata)
- return -1;
- for (i = 0; i < NR_syscalls; i++)
- if (syscalls_metadata[i])
- if (!strcmp(syscalls_metadata[i]->name, name))
- return i;
- return -1;
-}
-
-void set_syscall_enter_id(int num, int id)
-{
- syscalls_metadata[num]->enter_id = id;
-}
-
-void set_syscall_exit_id(int num, int id)
+unsigned long __init arch_syscall_addr(int nr)
{
- syscalls_metadata[num]->exit_id = id;
-}
-
-static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
-{
- struct syscall_metadata *start;
- struct syscall_metadata *stop;
- char str[KSYM_SYMBOL_LEN];
-
- start = (struct syscall_metadata *)__start_syscalls_metadata;
- stop = (struct syscall_metadata *)__stop_syscalls_metadata;
- kallsyms_lookup(syscall, NULL, NULL, NULL, str);
-
- for ( ; start < stop; start++) {
- if (start->name && !strcmp(start->name + 3, str + 3))
- return start;
- }
- return NULL;
-}
-
-static int __init arch_init_ftrace_syscalls(void)
-{
- struct syscall_metadata *meta;
- int i;
- syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) * NR_syscalls,
- GFP_KERNEL);
- if (!syscalls_metadata)
- return -ENOMEM;
- for (i = 0; i < NR_syscalls; i++) {
- meta = find_syscall_meta((unsigned long)sys_call_table[i]);
- syscalls_metadata[i] = meta;
- }
- return 0;
+ return (unsigned long)sys_call_table[nr];
}
-arch_initcall(arch_init_ftrace_syscalls);
#endif
arch/x86/kernel/entry_32.S
View filediff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index c097e7d..7d52e9d 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -1185,17 +1185,14 @@ END(ftrace_graph_caller)
.globl return_to_handler
return_to_handler:
- pushl $0
pushl %eax
- pushl %ecx
pushl %edx
movl %ebp, %eax
call ftrace_return_to_handler
- movl %eax, 0xc(%esp)
+ movl %eax, %ecx
popl %edx
- popl %ecx
popl %eax
- ret
+ jmp *%ecx
#endif
.section .rodata,"a"
arch/x86/kernel/entry_64.S
View filediff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index b5c061f..bd5bbdd 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -155,11 +155,11 @@ GLOBAL(return_to_handler)
call ftrace_return_to_handler
- movq %rax, 16(%rsp)
+ movq %rax, %rdi
movq 8(%rsp), %rdx
movq (%rsp), %rax
- addq $16, %rsp
- retq
+ addq $24, %rsp
+ jmp *%rdi
#endif
arch/x86/kernel/ftrace.c
View filediff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 9dbb527..5a1b975 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -9,6 +9,8 @@
* the dangers of modifying code on the run.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/spinlock.h>
#include <linux/hardirq.h>
#include <linux/uaccess.h>
@@ -336,15 +338,15 @@ int __init ftrace_dyn_arch_init(void *data)
switch (faulted) {
case 0:
- pr_info("ftrace: converting mcount calls to 0f 1f 44 00 00\n");
+ pr_info("converting mcount calls to 0f 1f 44 00 00\n");
memcpy(ftrace_nop, ftrace_test_p6nop, MCOUNT_INSN_SIZE);
break;
case 1:
- pr_info("ftrace: converting mcount calls to 66 66 66 66 90\n");
+ pr_info("converting mcount calls to 66 66 66 66 90\n");
memcpy(ftrace_nop, ftrace_test_nop5, MCOUNT_INSN_SIZE);
break;
case 2:
- pr_info("ftrace: converting mcount calls to jmp . + 5\n");
+ pr_info("converting mcount calls to jmp . + 5\n");
memcpy(ftrace_nop, ftrace_test_jmp, MCOUNT_INSN_SIZE);
break;
}
@@ -468,82 +470,10 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
#ifdef CONFIG_FTRACE_SYSCALLS
-extern unsigned long __start_syscalls_metadata[];
-extern unsigned long __stop_syscalls_metadata[];
extern unsigned long *sys_call_table;
-static struct syscall_metadata **syscalls_metadata;
-
-static struct syscall_metadata *find_syscall_meta(unsigned long *syscall)
-{
- struct syscall_metadata *start;
- struct syscall_metadata *stop;
- char str[KSYM_SYMBOL_LEN];
-
-
- start = (struct syscall_metadata *)__start_syscalls_metadata;
- stop = (struct syscall_metadata *)__stop_syscalls_metadata;
- kallsyms_lookup((unsigned long) syscall, NULL, NULL, NULL, str);
-
- for ( ; start < stop; start++) {
- if (start->name && !strcmp(start->name, str))
- return start;
- }
- return NULL;
-}
-
-struct syscall_metadata *syscall_nr_to_meta(int nr)
-{
- if (!syscalls_metadata || nr >= NR_syscalls || nr < 0)
- return NULL;
-
- return syscalls_metadata[nr];
-}
-
-int syscall_name_to_nr(char *name)
+unsigned long __init arch_syscall_addr(int nr)
{
- int i;
-
- if (!syscalls_metadata)
- return -1;
-
- for (i = 0; i < NR_syscalls; i++) {
- if (syscalls_metadata[i]) {
- if (!strcmp(syscalls_metadata[i]->name, name))
- return i;
- }
- }
- return -1;
-}
-
-void set_syscall_enter_id(int num, int id)
-{
- syscalls_metadata[num]->enter_id = id;
-}
-
-void set_syscall_exit_id(int num, int id)
-{
- syscalls_metadata[num]->exit_id = id;
-}
-
-static int __init arch_init_ftrace_syscalls(void)
-{
- int i;
- struct syscall_metadata *meta;
- unsigned long **psys_syscall_table = &sys_call_table;
-
- syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) *
- NR_syscalls, GFP_KERNEL);
- if (!syscalls_metadata) {
- WARN_ON(1);
- return -ENOMEM;
- }
-
- for (i = 0; i < NR_syscalls; i++) {
- meta = find_syscall_meta(psys_syscall_table[i]);
- syscalls_metadata[i] = meta;
- }
- return 0;
+ return (unsigned long)(&sys_call_table)[nr];
}
-arch_initcall(arch_init_ftrace_syscalls);
#endif
arch/x86/mm/testmmiotrace.c
View filediff --git a/arch/x86/mm/testmmiotrace.c b/arch/x86/mm/testmmiotrace.c
index 427fd1b..8565d94 100644
--- a/arch/x86/mm/testmmiotrace.c
+++ b/arch/x86/mm/testmmiotrace.c
@@ -1,12 +1,13 @@
/*
* Written by Pekka Paalanen, 2008-2009 <[email protected]>
*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
#include <linux/io.h>
#include <linux/mmiotrace.h>
-#define MODULE_NAME "testmmiotrace"
-
static unsigned long mmio_address;
module_param(mmio_address, ulong, 0);
MODULE_PARM_DESC(mmio_address, " Start address of the mapping of 16 kB "
@@ -30,7 +31,7 @@ static unsigned v32(unsigned i)
static void do_write_test(void __iomem *p)
{
unsigned int i;
- pr_info(MODULE_NAME ": write test.\n");
+ pr_info("write test.\n");
mmiotrace_printk("Write test.\n");
for (i = 0; i < 256; i++)
@@ -47,7 +48,7 @@ static void do_read_test(void __iomem *p)
{
unsigned int i;
unsigned errs[3] = { 0 };
- pr_info(MODULE_NAME ": read test.\n");
+ pr_info("read test.\n");
mmiotrace_printk("Read test.\n");
for (i = 0; i < 256; i++)
@@ -68,7 +69,7 @@ static void do_read_test(void __iomem *p)
static void do_read_far_test(void __iomem *p)
{
- pr_info(MODULE_NAME ": read far test.\n");
+ pr_info("read far test.\n");
mmiotrace_printk("Read far test.\n");
ioread32(p + read_far);
@@ -78,7 +79,7 @@ static void do_test(unsigned long size)
{
void __iomem *p = ioremap_nocache(mmio_address, size);
if (!p) {
- pr_err(MODULE_NAME ": could not ioremap, aborting.\n");
+ pr_err("could not ioremap, aborting.\n");
return;
}
mmiotrace_printk("ioremap returned %p.\n", p);
@@ -94,24 +95,22 @@ static int __init init(void)
unsigned long size = (read_far) ? (8 << 20) : (16 << 10);
if (mmio_address == 0) {
- pr_err(MODULE_NAME ": you have to use the module argument "
- "mmio_address.\n");
- pr_err(MODULE_NAME ": DO NOT LOAD THIS MODULE UNLESS"
- " YOU REALLY KNOW WHAT YOU ARE DOING!\n");
+ pr_err("you have to use the module argument mmio_address.\n");
+ pr_err("DO NOT LOAD THIS MODULE UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!\n");
return -ENXIO;
}
- pr_warning(MODULE_NAME ": WARNING: mapping %lu kB @ 0x%08lx in PCI "
- "address space, and writing 16 kB of rubbish in there.\n",
- size >> 10, mmio_address);
+ pr_warning("WARNING: mapping %lu kB @ 0x%08lx in PCI address space, "
+ "and writing 16 kB of rubbish in there.\n",
+ size >> 10, mmio_address);
do_test(size);
- pr_info(MODULE_NAME ": All done.\n");
+ pr_info("All done.\n");
return 0;
}
static void __exit cleanup(void)
{
- pr_debug(MODULE_NAME ": unloaded.\n");
+ pr_debug("unloaded.\n");
}
module_init(init);
include/linux/compiler-gcc.h
View filediff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index a3ed7cb..73dcf80 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -79,6 +79,7 @@
#define noinline __attribute__((noinline))
#define __attribute_const__ __attribute__((__const__))
#define __maybe_unused __attribute__((unused))
+#define __always_unused __attribute__((unused))
#define __gcc_header(x) #x
#define _gcc_header(x) __gcc_header(linux/compiler-gcc##x.h)
include/linux/compiler.h
View filediff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 59f2089..acbd654 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -218,6 +218,10 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
# define __maybe_unused /* unimplemented */
#endif
+#ifndef __always_unused
+# define __always_unused /* unimplemented */
+#endif
+
#ifndef noinline
#define noinline
#endif
include/linux/smp_lock.h
View filediff --git a/include/linux/smp_lock.h b/include/linux/smp_lock.h
index 813be59..2ea1dd1 100644
--- a/include/linux/smp_lock.h
+++ b/include/linux/smp_lock.h
@@ -24,8 +24,21 @@ static inline int reacquire_kernel_lock(struct task_struct *task)
return 0;
}
-extern void __lockfunc lock_kernel(void) __acquires(kernel_lock);
-extern void __lockfunc unlock_kernel(void) __releases(kernel_lock);
+extern void __lockfunc
+_lock_kernel(const char *func, const char *file, int line)
+__acquires(kernel_lock);
+
+extern void __lockfunc
+_unlock_kernel(const char *func, const char *file, int line)
+__releases(kernel_lock);
+
+#define lock_kernel() do { \
+ _lock_kernel(__func__, __FILE__, __LINE__); \
+} while (0)
+
+#define unlock_kernel() do { \
+ _unlock_kernel(__func__, __FILE__, __LINE__); \
+} while (0)
/*
* Various legacy drivers don't really need the BKL in a specific
@@ -41,8 +54,8 @@ static inline void cycle_kernel_lock(void)
#else
-#define lock_kernel() do { } while(0)
-#define unlock_kernel() do { } while(0)
+#define lock_kernel()
+#define unlock_kernel()
#define release_kernel_lock(task) do { } while(0)
#define cycle_kernel_lock() do { } while(0)
#define reacquire_kernel_lock(task) 0
include/trace/events/bkl.h
View filediff --git a/include/trace/events/bkl.h b/include/trace/events/bkl.h
new file mode 100644
index 0000000..8abd620
--- /dev/null
+++ b/include/trace/events/bkl.h
@@ -0,0 +1,61 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM bkl
+
+#if !defined(_TRACE_BKL_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_BKL_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(lock_kernel,
+
+ TP_PROTO(const char *func, const char *file, int line),
+
+ TP_ARGS(func, file, line),
+
+ TP_STRUCT__entry(
+ __field( int, lock_depth )
+ __field_ext( const char *, func, FILTER_PTR_STRING )
+ __field_ext( const char *, file, FILTER_PTR_STRING )
+ __field( int, line )
+ ),
+
+ TP_fast_assign(
+ /* We want to record the lock_depth after lock is acquired */
+ __entry->lock_depth = current->lock_depth + 1;
+ __entry->func = func;
+ __entry->file = file;
+ __entry->line = line;
+ ),
+
+ TP_printk("depth: %d, %s:%d %s()", __entry->lock_depth,
+ __entry->file, __entry->line, __entry->func)
+);
+
+TRACE_EVENT(unlock_kernel,
+
+ TP_PROTO(const char *func, const char *file, int line),
+
+ TP_ARGS(func, file, line),
+
+ TP_STRUCT__entry(
+ __field(int, lock_depth)
+ __field(const char *, func)
+ __field(const char *, file)
+ __field(int, line)
+ ),
+
+ TP_fast_assign(
+ __entry->lock_depth = current->lock_depth;
+ __entry->func = func;
+ __entry->file = file;
+ __entry->line = line;
+ ),
+
+ TP_printk("depth: %d, %s:%d %s()", __entry->lock_depth,
+ __entry->file, __entry->line, __entry->func)
+);
+
+#endif /* _TRACE_BKL_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
include/trace/events/syscalls.h
View filediff --git a/include/trace/events/syscalls.h b/include/trace/events/syscalls.h
index 397dff2..fb726ac 100644
--- a/include/trace/events/syscalls.h
+++ b/include/trace/events/syscalls.h
@@ -1,5 +1,6 @@
#undef TRACE_SYSTEM
-#define TRACE_SYSTEM syscalls
+#define TRACE_SYSTEM raw_syscalls
+#define TRACE_INCLUDE_FILE syscalls
#if !defined(_TRACE_EVENTS_SYSCALLS_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_EVENTS_SYSCALLS_H
include/trace/power.h
View before deletiondiff --git a/include/trace/power.h b/include/trace/power.h
deleted file mode 100644
index ef20466..0000000
--- a/include/trace/power.h
+++ /dev/null
@@ -1,32 +0,0 @@
-#ifndef _TRACE_POWER_H
-#define _TRACE_POWER_H
-
-#include <linux/ktime.h>
-#include <linux/tracepoint.h>
-
-enum {
- POWER_NONE = 0,
- POWER_CSTATE = 1,
- POWER_PSTATE = 2,
-};
-
-struct power_trace {
- ktime_t stamp;
- ktime_t end;
- int type;
- int state;
-};
-
-DECLARE_TRACE(power_start,
- TP_PROTO(struct power_trace *it, unsigned int type, unsigned int state),
- TP_ARGS(it, type, state));
-
-DECLARE_TRACE(power_mark,
- TP_PROTO(struct power_trace *it, unsigned int type, unsigned int state),
- TP_ARGS(it, type, state));
-
-DECLARE_TRACE(power_end,
- TP_PROTO(struct power_trace *it),
- TP_ARGS(it));
-
-#endif /* _TRACE_POWER_H */
include/trace/syscall.h
View filediff --git a/include/trace/syscall.h b/include/trace/syscall.h
index 5dc283b..e972f0a 100644
--- a/include/trace/syscall.h
+++ b/include/trace/syscall.h
@@ -33,7 +33,7 @@ struct syscall_metadata {
};
#ifdef CONFIG_FTRACE_SYSCALLS
-extern struct syscall_metadata *syscall_nr_to_meta(int nr);
+extern unsigned long arch_syscall_addr(int nr);
extern int syscall_name_to_nr(char *name);
void set_syscall_enter_id(int num, int id);
void set_syscall_exit_id(int num, int id);
kernel/kprobes.c
View filediff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 5240d75..1494e85 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1014,9 +1014,9 @@ int __kprobes register_kretprobe(struct kretprobe *rp)
/* Pre-allocate memory for max kretprobe instances */
if (rp->maxactive <= 0) {
#ifdef CONFIG_PREEMPT
- rp->maxactive = max(10, 2 * NR_CPUS);
+ rp->maxactive = max(10, 2 * num_possible_cpus());
#else
- rp->maxactive = NR_CPUS;
+ rp->maxactive = num_possible_cpus();
#endif
}
spin_lock_init(&rp->lock);
kernel/trace/ftrace.c
View filediff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 6dc4e5e..e51a1bc 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
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kernel/trace/ring_buffer.c
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kernel/trace/ring_buffer_benchmark.c
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kernel/trace/trace.c
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kernel/trace/trace.h
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kernel/trace/trace_clock.c
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kernel/trace/trace_events.c
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kernel/trace/trace_events_filter.c
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kernel/trace/trace_export.c
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kernel/trace/trace_syscalls.c
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lib/kernel_lock.c
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scripts/recordmcount.pl
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