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authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-12 19:18:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-12 19:18:49 -0700
commit3737a12761636ebde0f09ef49daebb8eed18cc8a (patch)
tree965057f4bccd97049f8c0140f8670c5d4278ca3e /include
parentc29deef32e3699e40da3e9e82267610de04e6b54 (diff)
parent82b897782d10fcc4930c9d4a15b175348fdd2871 (diff)
downloadlinux-3737a12761636ebde0f09ef49daebb8eed18cc8a.tar.gz
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull more perf updates from Ingo Molnar: "A second round of perf updates: - wide reaching kprobes sanitization and robustization, with the hope of fixing all 'probe this function crashes the kernel' bugs, by Masami Hiramatsu. - uprobes updates from Oleg Nesterov: tmpfs support, corner case fixes and robustization work. - perf tooling updates and fixes from Jiri Olsa, Namhyung Ki, Arnaldo et al: * Add support to accumulate hist periods (Namhyung Kim) * various fixes, refactorings and enhancements" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (101 commits) perf: Differentiate exec() and non-exec() comm events perf: Fix perf_event_comm() vs. exec() assumption uprobes/x86: Rename arch_uprobe->def to ->defparam, minor comment updates perf/documentation: Add description for conditional branch filter perf/x86: Add conditional branch filtering support perf/tool: Add conditional branch filter 'cond' to perf record perf: Add new conditional branch filter 'PERF_SAMPLE_BRANCH_COND' uprobes: Teach copy_insn() to support tmpfs uprobes: Shift ->readpage check from __copy_insn() to uprobe_register() perf/x86: Use common PMU interrupt disabled code perf/ARM: Use common PMU interrupt disabled code perf: Disable sampled events if no PMU interrupt perf: Fix use after free in perf_remove_from_context() perf tools: Fix 'make help' message error perf record: Fix poll return value propagation perf tools: Move elide bool into perf_hpp_fmt struct perf tools: Remove elide setup for SORT_MODE__MEMORY mode perf tools: Fix "==" into "=" in ui_browser__warning assignment perf tools: Allow overriding sysfs and proc finding with env var perf tools: Consider header files outside perf directory in tags target ...
Diffstat (limited to 'include')
-rw-r--r--include/asm-generic/vmlinux.lds.h10
-rw-r--r--include/linux/compiler.h2
-rw-r--r--include/linux/kprobes.h21
-rw-r--r--include/linux/perf_event.h18
-rw-r--r--include/linux/sched.h6
-rw-r--r--include/linux/uprobes.h4
-rw-r--r--include/uapi/linux/perf_event.h12
7 files changed, 63 insertions, 10 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index d647637cd699..471ba48c7ae4 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -109,6 +109,15 @@
#define BRANCH_PROFILE()
#endif
+#ifdef CONFIG_KPROBES
+#define KPROBE_BLACKLIST() . = ALIGN(8); \
+ VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \
+ *(_kprobe_blacklist) \
+ VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .;
+#else
+#define KPROBE_BLACKLIST()
+#endif
+
#ifdef CONFIG_EVENT_TRACING
#define FTRACE_EVENTS() . = ALIGN(8); \
VMLINUX_SYMBOL(__start_ftrace_events) = .; \
@@ -478,6 +487,7 @@
*(.init.rodata) \
FTRACE_EVENTS() \
TRACE_SYSCALLS() \
+ KPROBE_BLACKLIST() \
MEM_DISCARD(init.rodata) \
CLK_OF_TABLES() \
RESERVEDMEM_OF_TABLES() \
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 64fdfe1cfcf0..d5ad7b1118fc 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -383,7 +383,9 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
/* Ignore/forbid kprobes attach on very low level functions marked by this attribute: */
#ifdef CONFIG_KPROBES
# define __kprobes __attribute__((__section__(".kprobes.text")))
+# define nokprobe_inline __always_inline
#else
# define __kprobes
+# define nokprobe_inline inline
#endif
#endif /* __LINUX_COMPILER_H */
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index 7bd2ad01e39c..f7296e57d614 100644
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -205,10 +205,10 @@ struct kretprobe_blackpoint {
void *addr;
};
-struct kprobe_blackpoint {
- const char *name;
+struct kprobe_blacklist_entry {
+ struct list_head list;
unsigned long start_addr;
- unsigned long range;
+ unsigned long end_addr;
};
#ifdef CONFIG_KPROBES
@@ -265,6 +265,7 @@ extern void arch_disarm_kprobe(struct kprobe *p);
extern int arch_init_kprobes(void);
extern void show_registers(struct pt_regs *regs);
extern void kprobes_inc_nmissed_count(struct kprobe *p);
+extern bool arch_within_kprobe_blacklist(unsigned long addr);
struct kprobe_insn_cache {
struct mutex mutex;
@@ -476,4 +477,18 @@ static inline int enable_jprobe(struct jprobe *jp)
return enable_kprobe(&jp->kp);
}
+#ifdef CONFIG_KPROBES
+/*
+ * Blacklist ganerating macro. Specify functions which is not probed
+ * by using this macro.
+ */
+#define __NOKPROBE_SYMBOL(fname) \
+static unsigned long __used \
+ __attribute__((section("_kprobe_blacklist"))) \
+ _kbl_addr_##fname = (unsigned long)fname;
+#define NOKPROBE_SYMBOL(fname) __NOKPROBE_SYMBOL(fname)
+#else
+#define NOKPROBE_SYMBOL(fname)
+#endif
+
#endif /* _LINUX_KPROBES_H */
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index a9209118d80f..707617a8c0f6 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -167,6 +167,11 @@ struct perf_event;
#define PERF_EVENT_TXN 0x1
/**
+ * pmu::capabilities flags
+ */
+#define PERF_PMU_CAP_NO_INTERRUPT 0x01
+
+/**
* struct pmu - generic performance monitoring unit
*/
struct pmu {
@@ -178,6 +183,11 @@ struct pmu {
const char *name;
int type;
+ /*
+ * various common per-pmu feature flags
+ */
+ int capabilities;
+
int * __percpu pmu_disable_count;
struct perf_cpu_context * __percpu pmu_cpu_context;
int task_ctx_nr;
@@ -696,7 +706,8 @@ extern struct perf_guest_info_callbacks *perf_guest_cbs;
extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
-extern void perf_event_comm(struct task_struct *tsk);
+extern void perf_event_exec(void);
+extern void perf_event_comm(struct task_struct *tsk, bool exec);
extern void perf_event_fork(struct task_struct *tsk);
/* Callchains */
@@ -773,7 +784,7 @@ extern void perf_event_enable(struct perf_event *event);
extern void perf_event_disable(struct perf_event *event);
extern int __perf_event_disable(void *info);
extern void perf_event_task_tick(void);
-#else
+#else /* !CONFIG_PERF_EVENTS: */
static inline void
perf_event_task_sched_in(struct task_struct *prev,
struct task_struct *task) { }
@@ -803,7 +814,8 @@ static inline int perf_unregister_guest_info_callbacks
(struct perf_guest_info_callbacks *callbacks) { return 0; }
static inline void perf_event_mmap(struct vm_area_struct *vma) { }
-static inline void perf_event_comm(struct task_struct *tsk) { }
+static inline void perf_event_exec(void) { }
+static inline void perf_event_comm(struct task_struct *tsk, bool exec) { }
static inline void perf_event_fork(struct task_struct *tsk) { }
static inline void perf_event_init(void) { }
static inline int perf_swevent_get_recursion_context(void) { return -1; }
diff --git a/include/linux/sched.h b/include/linux/sched.h
index ea74596014a2..b8a98427f964 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2421,7 +2421,11 @@ extern long do_fork(unsigned long, unsigned long, unsigned long, int __user *, i
struct task_struct *fork_idle(int);
extern pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
-extern void set_task_comm(struct task_struct *tsk, const char *from);
+extern void __set_task_comm(struct task_struct *tsk, const char *from, bool exec);
+static inline void set_task_comm(struct task_struct *tsk, const char *from)
+{
+ __set_task_comm(tsk, from, false);
+}
extern char *get_task_comm(char *to, struct task_struct *tsk);
#ifdef CONFIG_SMP
diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
index c52f827ba6ce..4f844c6b03ee 100644
--- a/include/linux/uprobes.h
+++ b/include/linux/uprobes.h
@@ -103,6 +103,7 @@ extern int __weak set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, u
extern bool __weak is_swbp_insn(uprobe_opcode_t *insn);
extern bool __weak is_trap_insn(uprobe_opcode_t *insn);
extern unsigned long __weak uprobe_get_swbp_addr(struct pt_regs *regs);
+extern unsigned long uprobe_get_trap_addr(struct pt_regs *regs);
extern int uprobe_write_opcode(struct mm_struct *mm, unsigned long vaddr, uprobe_opcode_t);
extern int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc);
extern int uprobe_apply(struct inode *inode, loff_t offset, struct uprobe_consumer *uc, bool);
@@ -133,6 +134,9 @@ extern void __weak arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
#else /* !CONFIG_UPROBES */
struct uprobes_state {
};
+
+#define uprobe_get_trap_addr(regs) instruction_pointer(regs)
+
static inline int
uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc)
{
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index e3fc8f09d110..5312fae47218 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -163,8 +163,9 @@ enum perf_branch_sample_type {
PERF_SAMPLE_BRANCH_ABORT_TX = 1U << 7, /* transaction aborts */
PERF_SAMPLE_BRANCH_IN_TX = 1U << 8, /* in transaction */
PERF_SAMPLE_BRANCH_NO_TX = 1U << 9, /* not in transaction */
+ PERF_SAMPLE_BRANCH_COND = 1U << 10, /* conditional branches */
- PERF_SAMPLE_BRANCH_MAX = 1U << 10, /* non-ABI */
+ PERF_SAMPLE_BRANCH_MAX = 1U << 11, /* non-ABI */
};
#define PERF_SAMPLE_BRANCH_PLM_ALL \
@@ -301,8 +302,8 @@ struct perf_event_attr {
exclude_callchain_kernel : 1, /* exclude kernel callchains */
exclude_callchain_user : 1, /* exclude user callchains */
mmap2 : 1, /* include mmap with inode data */
-
- __reserved_1 : 40;
+ comm_exec : 1, /* flag comm events that are due to an exec */
+ __reserved_1 : 39;
union {
__u32 wakeup_events; /* wakeup every n events */
@@ -501,7 +502,12 @@ struct perf_event_mmap_page {
#define PERF_RECORD_MISC_GUEST_KERNEL (4 << 0)
#define PERF_RECORD_MISC_GUEST_USER (5 << 0)
+/*
+ * PERF_RECORD_MISC_MMAP_DATA and PERF_RECORD_MISC_COMM_EXEC are used on
+ * different events so can reuse the same bit position.
+ */
#define PERF_RECORD_MISC_MMAP_DATA (1 << 13)
+#define PERF_RECORD_MISC_COMM_EXEC (1 << 13)
/*
* Indicates that the content of PERF_SAMPLE_IP points to
* the actual instruction that triggered the event. See also