Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (25 commits) perf: Fix SIGIO handling perf top: Don't stop if no kernel symtab is found perf top: Handle kptr_restrict perf top: Remove unused macro perf events: initialize fd array to -1 instead of 0 perf tools: Make sure kptr_restrict warnings fit 80 col terms perf tools: Fix build on older systems perf symbols: Handle /proc/sys/kernel/kptr_restrict perf: Remove duplicate headers ftrace: Add internal recursive checks tracing: Update btrfs's tracepoints to use u64 interface tracing: Add __print_symbolic_u64 to avoid warnings on 32bit machine ftrace: Set ops->flag to enabled even on static function tracing tracing: Have event with function tracer check error return ftrace: Have ftrace_startup() return failure code jump_label: Check entries limit in __jump_label_update ftrace/recordmcount: Avoid STT_FUNC symbols as base on ARM scripts/tags.sh: Add magic for trace-events for etags too scripts/tags.sh: Fix ctags for DEFINE_EVENT() x86/ftrace: Fix compiler warning in ftrace.c ...
This commit is contained in:
Linus Torvalds
commit
c4a227d89f
@ -16,7 +16,7 @@ static int validate_memory_access_address(unsigned long addr, int size)
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return bfin_mem_access_type(addr, size);
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}
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long probe_kernel_read(void *dst, void *src, size_t size)
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long probe_kernel_read(void *dst, const void *src, size_t size)
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{
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unsigned long lsrc = (unsigned long)src;
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int mem_type;
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@ -55,7 +55,7 @@ long probe_kernel_read(void *dst, void *src, size_t size)
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return -EFAULT;
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}
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long probe_kernel_write(void *dst, void *src, size_t size)
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long probe_kernel_write(void *dst, const void *src, size_t size)
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{
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unsigned long ldst = (unsigned long)dst;
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int mem_type;
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@ -19,7 +19,7 @@
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* using the stura instruction.
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* Returns the number of bytes copied or -EFAULT.
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*/
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static long probe_kernel_write_odd(void *dst, void *src, size_t size)
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static long probe_kernel_write_odd(void *dst, const void *src, size_t size)
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{
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unsigned long count, aligned;
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int offset, mask;
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@ -45,7 +45,7 @@ static long probe_kernel_write_odd(void *dst, void *src, size_t size)
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return rc ? rc : count;
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}
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long probe_kernel_write(void *dst, void *src, size_t size)
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long probe_kernel_write(void *dst, const void *src, size_t size)
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{
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long copied = 0;
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@ -123,7 +123,7 @@ static unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr)
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static atomic_t nmi_running = ATOMIC_INIT(0);
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static int mod_code_status; /* holds return value of text write */
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static void *mod_code_ip; /* holds the IP to write to */
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static void *mod_code_newcode; /* holds the text to write to the IP */
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static const void *mod_code_newcode; /* holds the text to write to the IP */
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static unsigned nmi_wait_count;
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static atomic_t nmi_update_count = ATOMIC_INIT(0);
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@ -225,7 +225,7 @@ within(unsigned long addr, unsigned long start, unsigned long end)
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}
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static int
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do_ftrace_mod_code(unsigned long ip, void *new_code)
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do_ftrace_mod_code(unsigned long ip, const void *new_code)
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{
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/*
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* On x86_64, kernel text mappings are mapped read-only with
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@ -266,8 +266,8 @@ static const unsigned char *ftrace_nop_replace(void)
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}
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static int
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ftrace_modify_code(unsigned long ip, unsigned char *old_code,
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unsigned char *new_code)
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ftrace_modify_code(unsigned long ip, unsigned const char *old_code,
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unsigned const char *new_code)
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{
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unsigned char replaced[MCOUNT_INSN_SIZE];
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@ -301,7 +301,7 @@ ftrace_modify_code(unsigned long ip, unsigned char *old_code,
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int ftrace_make_nop(struct module *mod,
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struct dyn_ftrace *rec, unsigned long addr)
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{
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unsigned char *new, *old;
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unsigned const char *new, *old;
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unsigned long ip = rec->ip;
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old = ftrace_call_replace(ip, addr);
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@ -312,7 +312,7 @@ int ftrace_make_nop(struct module *mod,
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int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
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{
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unsigned char *new, *old;
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unsigned const char *new, *old;
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unsigned long ip = rec->ip;
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old = ftrace_nop_replace();
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@ -316,16 +316,23 @@ static void op_amd_stop_ibs(void)
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wrmsrl(MSR_AMD64_IBSOPCTL, 0);
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}
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static inline int eilvt_is_available(int offset)
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static inline int get_eilvt(int offset)
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{
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/* check if we may assign a vector */
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return !setup_APIC_eilvt(offset, 0, APIC_EILVT_MSG_NMI, 1);
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}
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static inline int put_eilvt(int offset)
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{
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return !setup_APIC_eilvt(offset, 0, 0, 1);
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}
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static inline int ibs_eilvt_valid(void)
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{
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int offset;
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u64 val;
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int valid = 0;
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preempt_disable();
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rdmsrl(MSR_AMD64_IBSCTL, val);
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offset = val & IBSCTL_LVT_OFFSET_MASK;
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@ -333,16 +340,20 @@ static inline int ibs_eilvt_valid(void)
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if (!(val & IBSCTL_LVT_OFFSET_VALID)) {
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pr_err(FW_BUG "cpu %d, invalid IBS interrupt offset %d (MSR%08X=0x%016llx)\n",
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smp_processor_id(), offset, MSR_AMD64_IBSCTL, val);
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return 0;
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goto out;
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}
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if (!eilvt_is_available(offset)) {
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if (!get_eilvt(offset)) {
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pr_err(FW_BUG "cpu %d, IBS interrupt offset %d not available (MSR%08X=0x%016llx)\n",
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smp_processor_id(), offset, MSR_AMD64_IBSCTL, val);
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return 0;
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goto out;
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}
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return 1;
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valid = 1;
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out:
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preempt_enable();
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return valid;
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}
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static inline int get_ibs_offset(void)
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@ -600,67 +611,69 @@ static int setup_ibs_ctl(int ibs_eilvt_off)
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static int force_ibs_eilvt_setup(void)
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{
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int i;
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int offset;
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int ret;
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/* find the next free available EILVT entry */
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for (i = 1; i < 4; i++) {
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if (!eilvt_is_available(i))
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continue;
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ret = setup_ibs_ctl(i);
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if (ret)
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return ret;
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pr_err(FW_BUG "using offset %d for IBS interrupts\n", i);
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return 0;
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/*
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* find the next free available EILVT entry, skip offset 0,
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* pin search to this cpu
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*/
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preempt_disable();
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for (offset = 1; offset < APIC_EILVT_NR_MAX; offset++) {
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if (get_eilvt(offset))
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break;
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}
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preempt_enable();
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if (offset == APIC_EILVT_NR_MAX) {
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printk(KERN_DEBUG "No EILVT entry available\n");
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return -EBUSY;
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}
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printk(KERN_DEBUG "No EILVT entry available\n");
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return -EBUSY;
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}
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static int __init_ibs_nmi(void)
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{
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int ret;
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if (ibs_eilvt_valid())
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return 0;
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ret = force_ibs_eilvt_setup();
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ret = setup_ibs_ctl(offset);
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if (ret)
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return ret;
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goto out;
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if (!ibs_eilvt_valid())
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return -EFAULT;
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if (!ibs_eilvt_valid()) {
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ret = -EFAULT;
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goto out;
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}
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pr_err(FW_BUG "using offset %d for IBS interrupts\n", offset);
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pr_err(FW_BUG "workaround enabled for IBS LVT offset\n");
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return 0;
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out:
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preempt_disable();
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put_eilvt(offset);
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preempt_enable();
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return ret;
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}
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/*
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* check and reserve APIC extended interrupt LVT offset for IBS if
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* available
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*
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* init_ibs() preforms implicitly cpu-local operations, so pin this
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* thread to its current CPU
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*/
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static void init_ibs(void)
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{
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preempt_disable();
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ibs_caps = get_ibs_caps();
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if (!ibs_caps)
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return;
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if (ibs_eilvt_valid())
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goto out;
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if (__init_ibs_nmi() < 0)
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ibs_caps = 0;
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else
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printk(KERN_INFO "oprofile: AMD IBS detected (0x%08x)\n", ibs_caps);
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if (!force_ibs_eilvt_setup())
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goto out;
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/* Failed to setup ibs */
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ibs_caps = 0;
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return;
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out:
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preempt_enable();
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printk(KERN_INFO "oprofile: AMD IBS detected (0x%08x)\n", ibs_caps);
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}
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static int (*create_arch_files)(struct super_block *sb, struct dentry *root);
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@ -11,7 +11,7 @@
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#define EVENT_BUFFER_H
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#include <linux/types.h>
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#include <asm/mutex.h>
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#include <linux/mutex.h>
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int alloc_event_buffer(void);
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@ -14,7 +14,7 @@
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#include <linux/moduleparam.h>
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#include <linux/workqueue.h>
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#include <linux/time.h>
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#include <asm/mutex.h>
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#include <linux/mutex.h>
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#include "oprof.h"
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#include "event_buffer.h"
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@ -16,6 +16,11 @@ struct trace_print_flags {
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const char *name;
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};
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struct trace_print_flags_u64 {
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unsigned long long mask;
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const char *name;
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};
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const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
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unsigned long flags,
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const struct trace_print_flags *flag_array);
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@ -23,6 +28,13 @@ const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
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const char *ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
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const struct trace_print_flags *symbol_array);
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#if BITS_PER_LONG == 32
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const char *ftrace_print_symbols_seq_u64(struct trace_seq *p,
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unsigned long long val,
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const struct trace_print_flags_u64
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*symbol_array);
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#endif
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const char *ftrace_print_hex_seq(struct trace_seq *p,
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const unsigned char *buf, int len);
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@ -1546,7 +1546,7 @@ struct task_struct {
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#ifdef CONFIG_TRACING
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/* state flags for use by tracers */
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unsigned long trace;
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/* bitmask of trace recursion */
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/* bitmask and counter of trace recursion */
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unsigned long trace_recursion;
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#endif /* CONFIG_TRACING */
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#ifdef CONFIG_CGROUP_MEM_RES_CTLR /* memcg uses this to do batch job */
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@ -93,8 +93,8 @@ static inline unsigned long __copy_from_user_nocache(void *to,
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* Safely read from address @src to the buffer at @dst. If a kernel fault
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* happens, handle that and return -EFAULT.
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*/
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extern long probe_kernel_read(void *dst, void *src, size_t size);
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extern long __probe_kernel_read(void *dst, void *src, size_t size);
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extern long probe_kernel_read(void *dst, const void *src, size_t size);
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extern long __probe_kernel_read(void *dst, const void *src, size_t size);
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/*
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* probe_kernel_write(): safely attempt to write to a location
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@ -105,7 +105,7 @@ extern long __probe_kernel_read(void *dst, void *src, size_t size);
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* Safely write to address @dst from the buffer at @src. If a kernel fault
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* happens, handle that and return -EFAULT.
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*/
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extern long notrace probe_kernel_write(void *dst, void *src, size_t size);
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extern long notrace __probe_kernel_write(void *dst, void *src, size_t size);
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extern long notrace probe_kernel_write(void *dst, const void *src, size_t size);
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extern long notrace __probe_kernel_write(void *dst, const void *src, size_t size);
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#endif /* __LINUX_UACCESS_H__ */
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@ -28,7 +28,7 @@ struct extent_buffer;
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{ BTRFS_SHARED_DATA_REF_KEY, "SHARED_DATA_REF" })
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#define __show_root_type(obj) \
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__print_symbolic(obj, \
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__print_symbolic_u64(obj, \
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{ BTRFS_ROOT_TREE_OBJECTID, "ROOT_TREE" }, \
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{ BTRFS_EXTENT_TREE_OBJECTID, "EXTENT_TREE" }, \
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{ BTRFS_CHUNK_TREE_OBJECTID, "CHUNK_TREE" }, \
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@ -125,7 +125,7 @@ DEFINE_EVENT(btrfs__inode, btrfs_inode_evict,
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);
|
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|
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#define __show_map_type(type) \
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__print_symbolic(type, \
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__print_symbolic_u64(type, \
|
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{ EXTENT_MAP_LAST_BYTE, "LAST_BYTE" }, \
|
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{ EXTENT_MAP_HOLE, "HOLE" }, \
|
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{ EXTENT_MAP_INLINE, "INLINE" }, \
|
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|
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@ -205,6 +205,19 @@
|
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ftrace_print_symbols_seq(p, value, symbols); \
|
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})
|
||||
|
||||
#undef __print_symbolic_u64
|
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#if BITS_PER_LONG == 32
|
||||
#define __print_symbolic_u64(value, symbol_array...) \
|
||||
({ \
|
||||
static const struct trace_print_flags_u64 symbols[] = \
|
||||
{ symbol_array, { -1, NULL } }; \
|
||||
ftrace_print_symbols_seq_u64(p, value, symbols); \
|
||||
})
|
||||
#else
|
||||
#define __print_symbolic_u64(value, symbol_array...) \
|
||||
__print_symbolic(value, symbol_array)
|
||||
#endif
|
||||
|
||||
#undef __print_hex
|
||||
#define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
|
||||
|
||||
|
||||
@ -5028,6 +5028,14 @@ static int __perf_event_overflow(struct perf_event *event, int nmi,
|
||||
else
|
||||
perf_event_output(event, nmi, data, regs);
|
||||
|
||||
if (event->fasync && event->pending_kill) {
|
||||
if (nmi) {
|
||||
event->pending_wakeup = 1;
|
||||
irq_work_queue(&event->pending);
|
||||
} else
|
||||
perf_event_wakeup(event);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
@ -105,9 +105,12 @@ static int __jump_label_text_reserved(struct jump_entry *iter_start,
|
||||
}
|
||||
|
||||
static void __jump_label_update(struct jump_label_key *key,
|
||||
struct jump_entry *entry, int enable)
|
||||
struct jump_entry *entry,
|
||||
struct jump_entry *stop, int enable)
|
||||
{
|
||||
for (; entry->key == (jump_label_t)(unsigned long)key; entry++) {
|
||||
for (; (entry < stop) &&
|
||||
(entry->key == (jump_label_t)(unsigned long)key);
|
||||
entry++) {
|
||||
/*
|
||||
* entry->code set to 0 invalidates module init text sections
|
||||
* kernel_text_address() verifies we are not in core kernel
|
||||
@ -181,7 +184,11 @@ static void __jump_label_mod_update(struct jump_label_key *key, int enable)
|
||||
struct jump_label_mod *mod = key->next;
|
||||
|
||||
while (mod) {
|
||||
__jump_label_update(key, mod->entries, enable);
|
||||
struct module *m = mod->mod;
|
||||
|
||||
__jump_label_update(key, mod->entries,
|
||||
m->jump_entries + m->num_jump_entries,
|
||||
enable);
|
||||
mod = mod->next;
|
||||
}
|
||||
}
|
||||
@ -245,7 +252,8 @@ static int jump_label_add_module(struct module *mod)
|
||||
key->next = jlm;
|
||||
|
||||
if (jump_label_enabled(key))
|
||||
__jump_label_update(key, iter, JUMP_LABEL_ENABLE);
|
||||
__jump_label_update(key, iter, iter_stop,
|
||||
JUMP_LABEL_ENABLE);
|
||||
}
|
||||
|
||||
return 0;
|
||||
@ -371,7 +379,7 @@ static void jump_label_update(struct jump_label_key *key, int enable)
|
||||
|
||||
/* if there are no users, entry can be NULL */
|
||||
if (entry)
|
||||
__jump_label_update(key, entry, enable);
|
||||
__jump_label_update(key, entry, __stop___jump_table, enable);
|
||||
|
||||
#ifdef CONFIG_MODULES
|
||||
__jump_label_mod_update(key, enable);
|
||||
|
||||
@ -109,12 +109,18 @@ ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip);
|
||||
static void ftrace_global_list_func(unsigned long ip,
|
||||
unsigned long parent_ip)
|
||||
{
|
||||
struct ftrace_ops *op = rcu_dereference_raw(ftrace_global_list); /*see above*/
|
||||
struct ftrace_ops *op;
|
||||
|
||||
if (unlikely(trace_recursion_test(TRACE_GLOBAL_BIT)))
|
||||
return;
|
||||
|
||||
trace_recursion_set(TRACE_GLOBAL_BIT);
|
||||
op = rcu_dereference_raw(ftrace_global_list); /*see above*/
|
||||
while (op != &ftrace_list_end) {
|
||||
op->func(ip, parent_ip);
|
||||
op = rcu_dereference_raw(op->next); /*see above*/
|
||||
};
|
||||
trace_recursion_clear(TRACE_GLOBAL_BIT);
|
||||
}
|
||||
|
||||
static void ftrace_pid_func(unsigned long ip, unsigned long parent_ip)
|
||||
@ -1638,12 +1644,12 @@ static void ftrace_startup_enable(int command)
|
||||
ftrace_run_update_code(command);
|
||||
}
|
||||
|
||||
static void ftrace_startup(struct ftrace_ops *ops, int command)
|
||||
static int ftrace_startup(struct ftrace_ops *ops, int command)
|
||||
{
|
||||
bool hash_enable = true;
|
||||
|
||||
if (unlikely(ftrace_disabled))
|
||||
return;
|
||||
return -ENODEV;
|
||||
|
||||
ftrace_start_up++;
|
||||
command |= FTRACE_ENABLE_CALLS;
|
||||
@ -1662,6 +1668,8 @@ static void ftrace_startup(struct ftrace_ops *ops, int command)
|
||||
ftrace_hash_rec_enable(ops, 1);
|
||||
|
||||
ftrace_startup_enable(command);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void ftrace_shutdown(struct ftrace_ops *ops, int command)
|
||||
@ -2501,7 +2509,7 @@ static void __enable_ftrace_function_probe(void)
|
||||
|
||||
ret = __register_ftrace_function(&trace_probe_ops);
|
||||
if (!ret)
|
||||
ftrace_startup(&trace_probe_ops, 0);
|
||||
ret = ftrace_startup(&trace_probe_ops, 0);
|
||||
|
||||
ftrace_probe_registered = 1;
|
||||
}
|
||||
@ -3466,7 +3474,11 @@ device_initcall(ftrace_nodyn_init);
|
||||
static inline int ftrace_init_dyn_debugfs(struct dentry *d_tracer) { return 0; }
|
||||
static inline void ftrace_startup_enable(int command) { }
|
||||
/* Keep as macros so we do not need to define the commands */
|
||||
# define ftrace_startup(ops, command) do { } while (0)
|
||||
# define ftrace_startup(ops, command) \
|
||||
({ \
|
||||
(ops)->flags |= FTRACE_OPS_FL_ENABLED; \
|
||||
0; \
|
||||
})
|
||||
# define ftrace_shutdown(ops, command) do { } while (0)
|
||||
# define ftrace_startup_sysctl() do { } while (0)
|
||||
# define ftrace_shutdown_sysctl() do { } while (0)
|
||||
@ -3484,6 +3496,10 @@ ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip)
|
||||
{
|
||||
struct ftrace_ops *op;
|
||||
|
||||
if (unlikely(trace_recursion_test(TRACE_INTERNAL_BIT)))
|
||||
return;
|
||||
|
||||
trace_recursion_set(TRACE_INTERNAL_BIT);
|
||||
/*
|
||||
* Some of the ops may be dynamically allocated,
|
||||
* they must be freed after a synchronize_sched().
|
||||
@ -3496,6 +3512,7 @@ ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip)
|
||||
op = rcu_dereference_raw(op->next);
|
||||
};
|
||||
preempt_enable_notrace();
|
||||
trace_recursion_clear(TRACE_INTERNAL_BIT);
|
||||
}
|
||||
|
||||
static void clear_ftrace_swapper(void)
|
||||
@ -3799,7 +3816,7 @@ int register_ftrace_function(struct ftrace_ops *ops)
|
||||
|
||||
ret = __register_ftrace_function(ops);
|
||||
if (!ret)
|
||||
ftrace_startup(ops, 0);
|
||||
ret = ftrace_startup(ops, 0);
|
||||
|
||||
|
||||
out_unlock:
|
||||
@ -4045,7 +4062,7 @@ int register_ftrace_graph(trace_func_graph_ret_t retfunc,
|
||||
ftrace_graph_return = retfunc;
|
||||
ftrace_graph_entry = entryfunc;
|
||||
|
||||
ftrace_startup(&global_ops, FTRACE_START_FUNC_RET);
|
||||
ret = ftrace_startup(&global_ops, FTRACE_START_FUNC_RET);
|
||||
|
||||
out:
|
||||
mutex_unlock(&ftrace_lock);
|
||||
|
||||
@ -2216,7 +2216,7 @@ static noinline void trace_recursive_fail(void)
|
||||
|
||||
printk_once(KERN_WARNING "Tracing recursion: depth[%ld]:"
|
||||
"HC[%lu]:SC[%lu]:NMI[%lu]\n",
|
||||
current->trace_recursion,
|
||||
trace_recursion_buffer(),
|
||||
hardirq_count() >> HARDIRQ_SHIFT,
|
||||
softirq_count() >> SOFTIRQ_SHIFT,
|
||||
in_nmi());
|
||||
@ -2226,9 +2226,9 @@ static noinline void trace_recursive_fail(void)
|
||||
|
||||
static inline int trace_recursive_lock(void)
|
||||
{
|
||||
current->trace_recursion++;
|
||||
trace_recursion_inc();
|
||||
|
||||
if (likely(current->trace_recursion < TRACE_RECURSIVE_DEPTH))
|
||||
if (likely(trace_recursion_buffer() < TRACE_RECURSIVE_DEPTH))
|
||||
return 0;
|
||||
|
||||
trace_recursive_fail();
|
||||
@ -2238,9 +2238,9 @@ static inline int trace_recursive_lock(void)
|
||||
|
||||
static inline void trace_recursive_unlock(void)
|
||||
{
|
||||
WARN_ON_ONCE(!current->trace_recursion);
|
||||
WARN_ON_ONCE(!trace_recursion_buffer());
|
||||
|
||||
current->trace_recursion--;
|
||||
trace_recursion_dec();
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
@ -784,4 +784,19 @@ extern const char *__stop___trace_bprintk_fmt[];
|
||||
FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print))
|
||||
#include "trace_entries.h"
|
||||
|
||||
/* Only current can touch trace_recursion */
|
||||
#define trace_recursion_inc() do { (current)->trace_recursion++; } while (0)
|
||||
#define trace_recursion_dec() do { (current)->trace_recursion--; } while (0)
|
||||
|
||||
/* Ring buffer has the 10 LSB bits to count */
|
||||
#define trace_recursion_buffer() ((current)->trace_recursion & 0x3ff)
|
||||
|
||||
/* for function tracing recursion */
|
||||
#define TRACE_INTERNAL_BIT (1<<11)
|
||||
#define TRACE_GLOBAL_BIT (1<<12)
|
||||
|
||||
#define trace_recursion_set(bit) do { (current)->trace_recursion |= (bit); } while (0)
|
||||
#define trace_recursion_clear(bit) do { (current)->trace_recursion &= ~(bit); } while (0)
|
||||
#define trace_recursion_test(bit) ((current)->trace_recursion & (bit))
|
||||
|
||||
#endif /* _LINUX_KERNEL_TRACE_H */
|
||||
|
||||
@ -1657,7 +1657,12 @@ static struct ftrace_ops trace_ops __initdata =
|
||||
|
||||
static __init void event_trace_self_test_with_function(void)
|
||||
{
|
||||
register_ftrace_function(&trace_ops);
|
||||
int ret;
|
||||
ret = register_ftrace_function(&trace_ops);
|
||||
if (WARN_ON(ret < 0)) {
|
||||
pr_info("Failed to enable function tracer for event tests\n");
|
||||
return;
|
||||
}
|
||||
pr_info("Running tests again, along with the function tracer\n");
|
||||
event_trace_self_tests();
|
||||
unregister_ftrace_function(&trace_ops);
|
||||
|
||||
@ -353,6 +353,33 @@ ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
|
||||
}
|
||||
EXPORT_SYMBOL(ftrace_print_symbols_seq);
|
||||
|
||||
#if BITS_PER_LONG == 32
|
||||
const char *
|
||||
ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
|
||||
const struct trace_print_flags_u64 *symbol_array)
|
||||
{
|
||||
int i;
|
||||
const char *ret = p->buffer + p->len;
|
||||
|
||||
for (i = 0; symbol_array[i].name; i++) {
|
||||
|
||||
if (val != symbol_array[i].mask)
|
||||
continue;
|
||||
|
||||
trace_seq_puts(p, symbol_array[i].name);
|
||||
break;
|
||||
}
|
||||
|
||||
if (!p->len)
|
||||
trace_seq_printf(p, "0x%llx", val);
|
||||
|
||||
trace_seq_putc(p, 0);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(ftrace_print_symbols_seq_u64);
|
||||
#endif
|
||||
|
||||
const char *
|
||||
ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
|
||||
{
|
||||
|
||||
@ -415,15 +415,13 @@ static void watchdog_nmi_disable(int cpu) { return; }
|
||||
#endif /* CONFIG_HARDLOCKUP_DETECTOR */
|
||||
|
||||
/* prepare/enable/disable routines */
|
||||
static int watchdog_prepare_cpu(int cpu)
|
||||
static void watchdog_prepare_cpu(int cpu)
|
||||
{
|
||||
struct hrtimer *hrtimer = &per_cpu(watchdog_hrtimer, cpu);
|
||||
|
||||
WARN_ON(per_cpu(softlockup_watchdog, cpu));
|
||||
hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
|
||||
hrtimer->function = watchdog_timer_fn;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int watchdog_enable(int cpu)
|
||||
@ -542,17 +540,16 @@ static int __cpuinit
|
||||
cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
|
||||
{
|
||||
int hotcpu = (unsigned long)hcpu;
|
||||
int err = 0;
|
||||
|
||||
switch (action) {
|
||||
case CPU_UP_PREPARE:
|
||||
case CPU_UP_PREPARE_FROZEN:
|
||||
err = watchdog_prepare_cpu(hotcpu);
|
||||
watchdog_prepare_cpu(hotcpu);
|
||||
break;
|
||||
case CPU_ONLINE:
|
||||
case CPU_ONLINE_FROZEN:
|
||||
if (watchdog_enabled)
|
||||
err = watchdog_enable(hotcpu);
|
||||
watchdog_enable(hotcpu);
|
||||
break;
|
||||
#ifdef CONFIG_HOTPLUG_CPU
|
||||
case CPU_UP_CANCELED:
|
||||
|
||||
@ -15,10 +15,10 @@
|
||||
* happens, handle that and return -EFAULT.
|
||||
*/
|
||||
|
||||
long __weak probe_kernel_read(void *dst, void *src, size_t size)
|
||||
long __weak probe_kernel_read(void *dst, const void *src, size_t size)
|
||||
__attribute__((alias("__probe_kernel_read")));
|
||||
|
||||
long __probe_kernel_read(void *dst, void *src, size_t size)
|
||||
long __probe_kernel_read(void *dst, const void *src, size_t size)
|
||||
{
|
||||
long ret;
|
||||
mm_segment_t old_fs = get_fs();
|
||||
@ -43,10 +43,10 @@ EXPORT_SYMBOL_GPL(probe_kernel_read);
|
||||
* Safely write to address @dst from the buffer at @src. If a kernel fault
|
||||
* happens, handle that and return -EFAULT.
|
||||
*/
|
||||
long __weak probe_kernel_write(void *dst, void *src, size_t size)
|
||||
long __weak probe_kernel_write(void *dst, const void *src, size_t size)
|
||||
__attribute__((alias("__probe_kernel_write")));
|
||||
|
||||
long __probe_kernel_write(void *dst, void *src, size_t size)
|
||||
long __probe_kernel_write(void *dst, const void *src, size_t size)
|
||||
{
|
||||
long ret;
|
||||
mm_segment_t old_fs = get_fs();
|
||||
|
||||
@ -43,6 +43,7 @@
|
||||
#undef ELF_R_INFO
|
||||
#undef Elf_r_info
|
||||
#undef ELF_ST_BIND
|
||||
#undef ELF_ST_TYPE
|
||||
#undef fn_ELF_R_SYM
|
||||
#undef fn_ELF_R_INFO
|
||||
#undef uint_t
|
||||
@ -76,6 +77,7 @@
|
||||
# define ELF_R_INFO ELF64_R_INFO
|
||||
# define Elf_r_info Elf64_r_info
|
||||
# define ELF_ST_BIND ELF64_ST_BIND
|
||||
# define ELF_ST_TYPE ELF64_ST_TYPE
|
||||
# define fn_ELF_R_SYM fn_ELF64_R_SYM
|
||||
# define fn_ELF_R_INFO fn_ELF64_R_INFO
|
||||
# define uint_t uint64_t
|
||||
@ -108,6 +110,7 @@
|
||||
# define ELF_R_INFO ELF32_R_INFO
|
||||
# define Elf_r_info Elf32_r_info
|
||||
# define ELF_ST_BIND ELF32_ST_BIND
|
||||
# define ELF_ST_TYPE ELF32_ST_TYPE
|
||||
# define fn_ELF_R_SYM fn_ELF32_R_SYM
|
||||
# define fn_ELF_R_INFO fn_ELF32_R_INFO
|
||||
# define uint_t uint32_t
|
||||
@ -427,6 +430,11 @@ static unsigned find_secsym_ndx(unsigned const txtndx,
|
||||
if (txtndx == w2(symp->st_shndx)
|
||||
/* avoid STB_WEAK */
|
||||
&& (STB_LOCAL == st_bind || STB_GLOBAL == st_bind)) {
|
||||
/* function symbols on ARM have quirks, avoid them */
|
||||
if (w2(ehdr->e_machine) == EM_ARM
|
||||
&& ELF_ST_TYPE(symp->st_info) == STT_FUNC)
|
||||
continue;
|
||||
|
||||
*recvalp = _w(symp->st_value);
|
||||
return symp - sym0;
|
||||
}
|
||||
|
||||
@ -132,7 +132,7 @@ exuberant()
|
||||
--regex-asm='/^ENTRY\(([^)]*)\).*/\1/' \
|
||||
--regex-c='/^SYSCALL_DEFINE[[:digit:]]?\(([^,)]*).*/sys_\1/' \
|
||||
--regex-c++='/^TRACE_EVENT\(([^,)]*).*/trace_\1/' \
|
||||
--regex-c++='/^DEFINE_EVENT\(([^,)]*).*/trace_\1/'
|
||||
--regex-c++='/^DEFINE_EVENT\([^,)]*, *([^,)]*).*/trace_\1/'
|
||||
|
||||
all_kconfigs | xargs $1 -a \
|
||||
--langdef=kconfig --language-force=kconfig \
|
||||
@ -152,7 +152,9 @@ emacs()
|
||||
{
|
||||
all_sources | xargs $1 -a \
|
||||
--regex='/^ENTRY(\([^)]*\)).*/\1/' \
|
||||
--regex='/^SYSCALL_DEFINE[0-9]?(\([^,)]*\).*/sys_\1/'
|
||||
--regex='/^SYSCALL_DEFINE[0-9]?(\([^,)]*\).*/sys_\1/' \
|
||||
--regex='/^TRACE_EVENT(\([^,)]*\).*/trace_\1/' \
|
||||
--regex='/^DEFINE_EVENT([^,)]*, *\([^,)]*\).*/trace_\1/'
|
||||
|
||||
all_kconfigs | xargs $1 -a \
|
||||
--regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'
|
||||
|
||||
@ -215,11 +215,13 @@ LIB_FILE=$(OUTPUT)libperf.a
|
||||
LIB_H += ../../include/linux/perf_event.h
|
||||
LIB_H += ../../include/linux/rbtree.h
|
||||
LIB_H += ../../include/linux/list.h
|
||||
LIB_H += ../../include/linux/const.h
|
||||
LIB_H += ../../include/linux/hash.h
|
||||
LIB_H += ../../include/linux/stringify.h
|
||||
LIB_H += util/include/linux/bitmap.h
|
||||
LIB_H += util/include/linux/bitops.h
|
||||
LIB_H += util/include/linux/compiler.h
|
||||
LIB_H += util/include/linux/const.h
|
||||
LIB_H += util/include/linux/ctype.h
|
||||
LIB_H += util/include/linux/kernel.h
|
||||
LIB_H += util/include/linux/list.h
|
||||
|
||||
@ -7,8 +7,6 @@
|
||||
*/
|
||||
#include "builtin.h"
|
||||
|
||||
#include "util/util.h"
|
||||
|
||||
#include "util/util.h"
|
||||
#include "util/color.h"
|
||||
#include <linux/list.h>
|
||||
|
||||
@ -823,6 +823,16 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
|
||||
|
||||
symbol__init();
|
||||
|
||||
if (symbol_conf.kptr_restrict)
|
||||
pr_warning(
|
||||
"WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
|
||||
"check /proc/sys/kernel/kptr_restrict.\n\n"
|
||||
"Samples in kernel functions may not be resolved if a suitable vmlinux\n"
|
||||
"file is not found in the buildid cache or in the vmlinux path.\n\n"
|
||||
"Samples in kernel modules won't be resolved at all.\n\n"
|
||||
"If some relocation was applied (e.g. kexec) symbols may be misresolved\n"
|
||||
"even with a suitable vmlinux or kallsyms file.\n\n");
|
||||
|
||||
if (no_buildid_cache || no_buildid)
|
||||
disable_buildid_cache();
|
||||
|
||||
|
||||
@ -116,6 +116,9 @@ static int process_sample_event(union perf_event *event,
|
||||
if (al.filtered || (hide_unresolved && al.sym == NULL))
|
||||
return 0;
|
||||
|
||||
if (al.map != NULL)
|
||||
al.map->dso->hit = 1;
|
||||
|
||||
if (perf_session__add_hist_entry(session, &al, sample, evsel)) {
|
||||
pr_debug("problem incrementing symbol period, skipping event\n");
|
||||
return -1;
|
||||
@ -249,6 +252,8 @@ static int __cmd_report(void)
|
||||
u64 nr_samples;
|
||||
struct perf_session *session;
|
||||
struct perf_evsel *pos;
|
||||
struct map *kernel_map;
|
||||
struct kmap *kernel_kmap;
|
||||
const char *help = "For a higher level overview, try: perf report --sort comm,dso";
|
||||
|
||||
signal(SIGINT, sig_handler);
|
||||
@ -268,6 +273,24 @@ static int __cmd_report(void)
|
||||
if (ret)
|
||||
goto out_delete;
|
||||
|
||||
kernel_map = session->host_machine.vmlinux_maps[MAP__FUNCTION];
|
||||
kernel_kmap = map__kmap(kernel_map);
|
||||
if (kernel_map == NULL ||
|
||||
(kernel_map->dso->hit &&
|
||||
(kernel_kmap->ref_reloc_sym == NULL ||
|
||||
kernel_kmap->ref_reloc_sym->addr == 0))) {
|
||||
const struct dso *kdso = kernel_map->dso;
|
||||
|
||||
ui__warning(
|
||||
"Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n"
|
||||
"Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n"
|
||||
"Samples in kernel modules can't be resolved as well.\n\n",
|
||||
RB_EMPTY_ROOT(&kdso->symbols[MAP__FUNCTION]) ?
|
||||
"As no suitable kallsyms nor vmlinux was found, kernel samples\n"
|
||||
"can't be resolved." :
|
||||
"If some relocation was applied (e.g. kexec) symbols may be misresolved.");
|
||||
}
|
||||
|
||||
if (dump_trace) {
|
||||
perf_session__fprintf_nr_events(session, stdout);
|
||||
goto out_delete;
|
||||
|
||||
@ -10,7 +10,6 @@
|
||||
#include "util/symbol.h"
|
||||
#include "util/thread.h"
|
||||
#include "util/trace-event.h"
|
||||
#include "util/parse-options.h"
|
||||
#include "util/util.h"
|
||||
#include "util/evlist.h"
|
||||
#include "util/evsel.h"
|
||||
|
||||
@ -62,8 +62,6 @@
|
||||
#include <linux/unistd.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
|
||||
|
||||
static struct perf_top top = {
|
||||
.count_filter = 5,
|
||||
.delay_secs = 2,
|
||||
@ -82,6 +80,8 @@ static bool use_tui, use_stdio;
|
||||
|
||||
static int default_interval = 0;
|
||||
|
||||
static bool kptr_restrict_warned;
|
||||
static bool vmlinux_warned;
|
||||
static bool inherit = false;
|
||||
static int realtime_prio = 0;
|
||||
static bool group = false;
|
||||
@ -740,7 +740,22 @@ static void perf_event__process_sample(const union perf_event *event,
|
||||
al.filtered)
|
||||
return;
|
||||
|
||||
if (!kptr_restrict_warned &&
|
||||
symbol_conf.kptr_restrict &&
|
||||
al.cpumode == PERF_RECORD_MISC_KERNEL) {
|
||||
ui__warning(
|
||||
"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
|
||||
"Check /proc/sys/kernel/kptr_restrict.\n\n"
|
||||
"Kernel%s samples will not be resolved.\n",
|
||||
!RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
|
||||
" modules" : "");
|
||||
if (use_browser <= 0)
|
||||
sleep(5);
|
||||
kptr_restrict_warned = true;
|
||||
}
|
||||
|
||||
if (al.sym == NULL) {
|
||||
const char *msg = "Kernel samples will not be resolved.\n";
|
||||
/*
|
||||
* As we do lazy loading of symtabs we only will know if the
|
||||
* specified vmlinux file is invalid when we actually have a
|
||||
@ -752,12 +767,20 @@ static void perf_event__process_sample(const union perf_event *event,
|
||||
* --hide-kernel-symbols, even if the user specifies an
|
||||
* invalid --vmlinux ;-)
|
||||
*/
|
||||
if (al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
|
||||
if (!kptr_restrict_warned && !vmlinux_warned &&
|
||||
al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
|
||||
RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
|
||||
ui__warning("The %s file can't be used\n",
|
||||
symbol_conf.vmlinux_name);
|
||||
exit_browser(0);
|
||||
exit(1);
|
||||
if (symbol_conf.vmlinux_name) {
|
||||
ui__warning("The %s file can't be used.\n%s",
|
||||
symbol_conf.vmlinux_name, msg);
|
||||
} else {
|
||||
ui__warning("A vmlinux file was not found.\n%s",
|
||||
msg);
|
||||
}
|
||||
|
||||
if (use_browser <= 0)
|
||||
sleep(5);
|
||||
vmlinux_warned = true;
|
||||
}
|
||||
|
||||
return;
|
||||
|
||||
@ -553,9 +553,18 @@ static int perf_event__process_kernel_mmap(union perf_event *event,
|
||||
goto out_problem;
|
||||
|
||||
perf_event__set_kernel_mmap_len(event, machine->vmlinux_maps);
|
||||
perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
|
||||
symbol_name,
|
||||
event->mmap.pgoff);
|
||||
|
||||
/*
|
||||
* Avoid using a zero address (kptr_restrict) for the ref reloc
|
||||
* symbol. Effectively having zero here means that at record
|
||||
* time /proc/sys/kernel/kptr_restrict was non zero.
|
||||
*/
|
||||
if (event->mmap.pgoff != 0) {
|
||||
perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
|
||||
symbol_name,
|
||||
event->mmap.pgoff);
|
||||
}
|
||||
|
||||
if (machine__is_default_guest(machine)) {
|
||||
/*
|
||||
* preload dso of guest kernel and modules
|
||||
|
||||
@ -35,7 +35,17 @@ struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
|
||||
|
||||
int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
|
||||
{
|
||||
int cpu, thread;
|
||||
evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
|
||||
|
||||
if (evsel->fd) {
|
||||
for (cpu = 0; cpu < ncpus; cpu++) {
|
||||
for (thread = 0; thread < nthreads; thread++) {
|
||||
FD(evsel, cpu, thread) = -1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return evsel->fd != NULL ? 0 : -ENOMEM;
|
||||
}
|
||||
|
||||
|
||||
@ -193,9 +193,13 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
|
||||
*linkname = malloc(size), *targetname;
|
||||
int len, err = -1;
|
||||
|
||||
if (is_kallsyms)
|
||||
if (is_kallsyms) {
|
||||
if (symbol_conf.kptr_restrict) {
|
||||
pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n");
|
||||
return 0;
|
||||
}
|
||||
realname = (char *)name;
|
||||
else
|
||||
} else
|
||||
realname = realpath(name, NULL);
|
||||
|
||||
if (realname == NULL || filename == NULL || linkname == NULL)
|
||||
|
||||
1
tools/perf/util/include/linux/const.h
Normal file
1
tools/perf/util/include/linux/const.h
Normal file
@ -0,0 +1 @@
|
||||
#include "../../../../include/linux/const.h"
|
||||
@ -676,9 +676,30 @@ discard_symbol: rb_erase(&pos->rb_node, root);
|
||||
return count + moved;
|
||||
}
|
||||
|
||||
static bool symbol__restricted_filename(const char *filename,
|
||||
const char *restricted_filename)
|
||||
{
|
||||
bool restricted = false;
|
||||
|
||||
if (symbol_conf.kptr_restrict) {
|
||||
char *r = realpath(filename, NULL);
|
||||
|
||||
if (r != NULL) {
|
||||
restricted = strcmp(r, restricted_filename) == 0;
|
||||
free(r);
|
||||
return restricted;
|
||||
}
|
||||
}
|
||||
|
||||
return restricted;
|
||||
}
|
||||
|
||||
int dso__load_kallsyms(struct dso *dso, const char *filename,
|
||||
struct map *map, symbol_filter_t filter)
|
||||
{
|
||||
if (symbol__restricted_filename(filename, "/proc/kallsyms"))
|
||||
return -1;
|
||||
|
||||
if (dso__load_all_kallsyms(dso, filename, map) < 0)
|
||||
return -1;
|
||||
|
||||
@ -1790,6 +1811,9 @@ static int machine__create_modules(struct machine *machine)
|
||||
modules = path;
|
||||
}
|
||||
|
||||
if (symbol__restricted_filename(path, "/proc/modules"))
|
||||
return -1;
|
||||
|
||||
file = fopen(modules, "r");
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
@ -2239,6 +2263,9 @@ static u64 machine__get_kernel_start_addr(struct machine *machine)
|
||||
}
|
||||
}
|
||||
|
||||
if (symbol__restricted_filename(filename, "/proc/kallsyms"))
|
||||
return 0;
|
||||
|
||||
if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0)
|
||||
return 0;
|
||||
|
||||
@ -2410,6 +2437,25 @@ static int setup_list(struct strlist **list, const char *list_str,
|
||||
return 0;
|
||||
}
|
||||
|
||||
static bool symbol__read_kptr_restrict(void)
|
||||
{
|
||||
bool value = false;
|
||||
|
||||
if (geteuid() != 0) {
|
||||
FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r");
|
||||
if (fp != NULL) {
|
||||
char line[8];
|
||||
|
||||
if (fgets(line, sizeof(line), fp) != NULL)
|
||||
value = atoi(line) != 0;
|
||||
|
||||
fclose(fp);
|
||||
}
|
||||
}
|
||||
|
||||
return value;
|
||||
}
|
||||
|
||||
int symbol__init(void)
|
||||
{
|
||||
const char *symfs;
|
||||
@ -2456,6 +2502,8 @@ int symbol__init(void)
|
||||
if (symfs != symbol_conf.symfs)
|
||||
free((void *)symfs);
|
||||
|
||||
symbol_conf.kptr_restrict = symbol__read_kptr_restrict();
|
||||
|
||||
symbol_conf.initialized = true;
|
||||
return 0;
|
||||
|
||||
|
||||
@ -75,7 +75,8 @@ struct symbol_conf {
|
||||
use_callchain,
|
||||
exclude_other,
|
||||
show_cpu_utilization,
|
||||
initialized;
|
||||
initialized,
|
||||
kptr_restrict;
|
||||
const char *vmlinux_name,
|
||||
*kallsyms_name,
|
||||
*source_prefix,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user