zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/tools/perf/util/probe-event.c b/ap/os/linux/linux-3.4.x/tools/perf/util/probe-event.c
new file mode 100644
index 0000000..8a8ee64
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/tools/perf/util/probe-event.c
@@ -0,0 +1,2097 @@
+/*
+ * probe-event.c : perf-probe definition to probe_events format converter
+ *
+ * Written by Masami Hiramatsu <mhiramat@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include <sys/utsname.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <limits.h>
+#include <elf.h>
+
+#include "util.h"
+#include "event.h"
+#include "strlist.h"
+#include "debug.h"
+#include "cache.h"
+#include "color.h"
+#include "symbol.h"
+#include "thread.h"
+#include "debugfs.h"
+#include "trace-event.h" /* For __unused */
+#include "probe-event.h"
+#include "probe-finder.h"
+
+#define MAX_CMDLEN 256
+#define MAX_PROBE_ARGS 128
+#define PERFPROBE_GROUP "probe"
+
+bool probe_event_dry_run; /* Dry run flag */
+
+#define semantic_error(msg ...) pr_err("Semantic error :" msg)
+
+/* If there is no space to write, returns -E2BIG. */
+static int e_snprintf(char *str, size_t size, const char *format, ...)
+ __attribute__((format(printf, 3, 4)));
+
+static int e_snprintf(char *str, size_t size, const char *format, ...)
+{
+ int ret;
+ va_list ap;
+ va_start(ap, format);
+ ret = vsnprintf(str, size, format, ap);
+ va_end(ap);
+ if (ret >= (int)size)
+ ret = -E2BIG;
+ return ret;
+}
+
+static char *synthesize_perf_probe_point(struct perf_probe_point *pp);
+static struct machine machine;
+
+/* Initialize symbol maps and path of vmlinux/modules */
+static int init_vmlinux(void)
+{
+ int ret;
+
+ symbol_conf.sort_by_name = true;
+ if (symbol_conf.vmlinux_name == NULL)
+ symbol_conf.try_vmlinux_path = true;
+ else
+ pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name);
+ ret = symbol__init();
+ if (ret < 0) {
+ pr_debug("Failed to init symbol map.\n");
+ goto out;
+ }
+
+ ret = machine__init(&machine, "", HOST_KERNEL_ID);
+ if (ret < 0)
+ goto out;
+
+ if (machine__create_kernel_maps(&machine) < 0) {
+ pr_debug("machine__create_kernel_maps() failed.\n");
+ goto out;
+ }
+out:
+ if (ret < 0)
+ pr_warning("Failed to init vmlinux path.\n");
+ return ret;
+}
+
+static struct symbol *__find_kernel_function_by_name(const char *name,
+ struct map **mapp)
+{
+ return machine__find_kernel_function_by_name(&machine, name, mapp,
+ NULL);
+}
+
+static struct map *kernel_get_module_map(const char *module)
+{
+ struct rb_node *nd;
+ struct map_groups *grp = &machine.kmaps;
+
+ /* A file path -- this is an offline module */
+ if (module && strchr(module, '/'))
+ return machine__new_module(&machine, 0, module);
+
+ if (!module)
+ module = "kernel";
+
+ for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) {
+ struct map *pos = rb_entry(nd, struct map, rb_node);
+ if (strncmp(pos->dso->short_name + 1, module,
+ pos->dso->short_name_len - 2) == 0) {
+ return pos;
+ }
+ }
+ return NULL;
+}
+
+static struct dso *kernel_get_module_dso(const char *module)
+{
+ struct dso *dso;
+ struct map *map;
+ const char *vmlinux_name;
+
+ if (module) {
+ list_for_each_entry(dso, &machine.kernel_dsos, node) {
+ if (strncmp(dso->short_name + 1, module,
+ dso->short_name_len - 2) == 0)
+ goto found;
+ }
+ pr_debug("Failed to find module %s.\n", module);
+ return NULL;
+ }
+
+ map = machine.vmlinux_maps[MAP__FUNCTION];
+ dso = map->dso;
+
+ vmlinux_name = symbol_conf.vmlinux_name;
+ if (vmlinux_name) {
+ if (dso__load_vmlinux(dso, map, vmlinux_name, NULL) <= 0)
+ return NULL;
+ } else {
+ if (dso__load_vmlinux_path(dso, map, NULL) <= 0) {
+ pr_debug("Failed to load kernel map.\n");
+ return NULL;
+ }
+ }
+found:
+ return dso;
+}
+
+const char *kernel_get_module_path(const char *module)
+{
+ struct dso *dso = kernel_get_module_dso(module);
+ return (dso) ? dso->long_name : NULL;
+}
+
+#ifdef DWARF_SUPPORT
+/* Open new debuginfo of given module */
+static struct debuginfo *open_debuginfo(const char *module)
+{
+ const char *path;
+
+ /* A file path -- this is an offline module */
+ if (module && strchr(module, '/'))
+ path = module;
+ else {
+ path = kernel_get_module_path(module);
+
+ if (!path) {
+ pr_err("Failed to find path of %s module.\n",
+ module ?: "kernel");
+ return NULL;
+ }
+ }
+ return debuginfo__new(path);
+}
+
+/*
+ * Convert trace point to probe point with debuginfo
+ * Currently only handles kprobes.
+ */
+static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp,
+ struct perf_probe_point *pp)
+{
+ struct symbol *sym;
+ struct map *map;
+ u64 addr;
+ int ret = -ENOENT;
+ struct debuginfo *dinfo;
+
+ sym = __find_kernel_function_by_name(tp->symbol, &map);
+ if (sym) {
+ addr = map->unmap_ip(map, sym->start + tp->offset);
+ pr_debug("try to find %s+%ld@%" PRIx64 "\n", tp->symbol,
+ tp->offset, addr);
+
+ dinfo = debuginfo__new_online_kernel(addr);
+ if (dinfo) {
+ ret = debuginfo__find_probe_point(dinfo,
+ (unsigned long)addr, pp);
+ debuginfo__delete(dinfo);
+ } else {
+ pr_debug("Failed to open debuginfo at 0x%" PRIx64 "\n",
+ addr);
+ ret = -ENOENT;
+ }
+ }
+ if (ret <= 0) {
+ pr_debug("Failed to find corresponding probes from "
+ "debuginfo. Use kprobe event information.\n");
+ pp->function = strdup(tp->symbol);
+ if (pp->function == NULL)
+ return -ENOMEM;
+ pp->offset = tp->offset;
+ }
+ pp->retprobe = tp->retprobe;
+
+ return 0;
+}
+
+static int add_module_to_probe_trace_events(struct probe_trace_event *tevs,
+ int ntevs, const char *module)
+{
+ int i, ret = 0;
+ char *tmp;
+
+ if (!module)
+ return 0;
+
+ tmp = strrchr(module, '/');
+ if (tmp) {
+ /* This is a module path -- get the module name */
+ module = strdup(tmp + 1);
+ if (!module)
+ return -ENOMEM;
+ tmp = strchr(module, '.');
+ if (tmp)
+ *tmp = '\0';
+ tmp = (char *)module; /* For free() */
+ }
+
+ for (i = 0; i < ntevs; i++) {
+ tevs[i].point.module = strdup(module);
+ if (!tevs[i].point.module) {
+ ret = -ENOMEM;
+ break;
+ }
+ }
+
+ if (tmp)
+ free(tmp);
+
+ return ret;
+}
+
+/* Try to find perf_probe_event with debuginfo */
+static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
+ struct probe_trace_event **tevs,
+ int max_tevs, const char *target)
+{
+ bool need_dwarf = perf_probe_event_need_dwarf(pev);
+ struct debuginfo *dinfo = open_debuginfo(target);
+ int ntevs, ret = 0;
+
+ if (!dinfo) {
+ if (need_dwarf) {
+ pr_warning("Failed to open debuginfo file.\n");
+ return -ENOENT;
+ }
+ pr_debug("Could not open debuginfo. Try to use symbols.\n");
+ return 0;
+ }
+
+ /* Searching trace events corresponding to a probe event */
+ ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs);
+
+ debuginfo__delete(dinfo);
+
+ if (ntevs > 0) { /* Succeeded to find trace events */
+ pr_debug("find %d probe_trace_events.\n", ntevs);
+ if (target)
+ ret = add_module_to_probe_trace_events(*tevs, ntevs,
+ target);
+ return ret < 0 ? ret : ntevs;
+ }
+
+ if (ntevs == 0) { /* No error but failed to find probe point. */
+ pr_warning("Probe point '%s' not found.\n",
+ synthesize_perf_probe_point(&pev->point));
+ return -ENOENT;
+ }
+ /* Error path : ntevs < 0 */
+ pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs);
+ if (ntevs == -EBADF) {
+ pr_warning("Warning: No dwarf info found in the vmlinux - "
+ "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n");
+ if (!need_dwarf) {
+ pr_debug("Trying to use symbols.\n");
+ return 0;
+ }
+ }
+ return ntevs;
+}
+
+/*
+ * Find a src file from a DWARF tag path. Prepend optional source path prefix
+ * and chop off leading directories that do not exist. Result is passed back as
+ * a newly allocated path on success.
+ * Return 0 if file was found and readable, -errno otherwise.
+ */
+static int get_real_path(const char *raw_path, const char *comp_dir,
+ char **new_path)
+{
+ const char *prefix = symbol_conf.source_prefix;
+
+ if (!prefix) {
+ if (raw_path[0] != '/' && comp_dir)
+ /* If not an absolute path, try to use comp_dir */
+ prefix = comp_dir;
+ else {
+ if (access(raw_path, R_OK) == 0) {
+ *new_path = strdup(raw_path);
+ return 0;
+ } else
+ return -errno;
+ }
+ }
+
+ *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2));
+ if (!*new_path)
+ return -ENOMEM;
+
+ for (;;) {
+ sprintf(*new_path, "%s/%s", prefix, raw_path);
+
+ if (access(*new_path, R_OK) == 0)
+ return 0;
+
+ if (!symbol_conf.source_prefix)
+ /* In case of searching comp_dir, don't retry */
+ return -errno;
+
+ switch (errno) {
+ case ENAMETOOLONG:
+ case ENOENT:
+ case EROFS:
+ case EFAULT:
+ raw_path = strchr(++raw_path, '/');
+ if (!raw_path) {
+ free(*new_path);
+ *new_path = NULL;
+ return -ENOENT;
+ }
+ continue;
+
+ default:
+ free(*new_path);
+ *new_path = NULL;
+ return -errno;
+ }
+ }
+}
+
+#define LINEBUF_SIZE 256
+#define NR_ADDITIONAL_LINES 2
+
+static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
+{
+ char buf[LINEBUF_SIZE];
+ const char *color = show_num ? "" : PERF_COLOR_BLUE;
+ const char *prefix = NULL;
+
+ do {
+ if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
+ goto error;
+ if (skip)
+ continue;
+ if (!prefix) {
+ prefix = show_num ? "%7d " : " ";
+ color_fprintf(stdout, color, prefix, l);
+ }
+ color_fprintf(stdout, color, "%s", buf);
+
+ } while (strchr(buf, '\n') == NULL);
+
+ return 1;
+error:
+ if (ferror(fp)) {
+ pr_warning("File read error: %s\n", strerror(errno));
+ return -1;
+ }
+ return 0;
+}
+
+static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
+{
+ int rv = __show_one_line(fp, l, skip, show_num);
+ if (rv == 0) {
+ pr_warning("Source file is shorter than expected.\n");
+ rv = -1;
+ }
+ return rv;
+}
+
+#define show_one_line_with_num(f,l) _show_one_line(f,l,false,true)
+#define show_one_line(f,l) _show_one_line(f,l,false,false)
+#define skip_one_line(f,l) _show_one_line(f,l,true,false)
+#define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false)
+
+/*
+ * Show line-range always requires debuginfo to find source file and
+ * line number.
+ */
+int show_line_range(struct line_range *lr, const char *module)
+{
+ int l = 1;
+ struct line_node *ln;
+ struct debuginfo *dinfo;
+ FILE *fp;
+ int ret;
+ char *tmp;
+
+ /* Search a line range */
+ ret = init_vmlinux();
+ if (ret < 0)
+ return ret;
+
+ dinfo = open_debuginfo(module);
+ if (!dinfo) {
+ pr_warning("Failed to open debuginfo file.\n");
+ return -ENOENT;
+ }
+
+ ret = debuginfo__find_line_range(dinfo, lr);
+ debuginfo__delete(dinfo);
+ if (ret == 0) {
+ pr_warning("Specified source line is not found.\n");
+ return -ENOENT;
+ } else if (ret < 0) {
+ pr_warning("Debuginfo analysis failed. (%d)\n", ret);
+ return ret;
+ }
+
+ /* Convert source file path */
+ tmp = lr->path;
+ ret = get_real_path(tmp, lr->comp_dir, &lr->path);
+ free(tmp); /* Free old path */
+ if (ret < 0) {
+ pr_warning("Failed to find source file. (%d)\n", ret);
+ return ret;
+ }
+
+ setup_pager();
+
+ if (lr->function)
+ fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path,
+ lr->start - lr->offset);
+ else
+ fprintf(stdout, "<%s:%d>\n", lr->path, lr->start);
+
+ fp = fopen(lr->path, "r");
+ if (fp == NULL) {
+ pr_warning("Failed to open %s: %s\n", lr->path,
+ strerror(errno));
+ return -errno;
+ }
+ /* Skip to starting line number */
+ while (l < lr->start) {
+ ret = skip_one_line(fp, l++);
+ if (ret < 0)
+ goto end;
+ }
+
+ list_for_each_entry(ln, &lr->line_list, list) {
+ for (; ln->line > l; l++) {
+ ret = show_one_line(fp, l - lr->offset);
+ if (ret < 0)
+ goto end;
+ }
+ ret = show_one_line_with_num(fp, l++ - lr->offset);
+ if (ret < 0)
+ goto end;
+ }
+
+ if (lr->end == INT_MAX)
+ lr->end = l + NR_ADDITIONAL_LINES;
+ while (l <= lr->end) {
+ ret = show_one_line_or_eof(fp, l++ - lr->offset);
+ if (ret <= 0)
+ break;
+ }
+end:
+ fclose(fp);
+ return ret;
+}
+
+static int show_available_vars_at(struct debuginfo *dinfo,
+ struct perf_probe_event *pev,
+ int max_vls, struct strfilter *_filter,
+ bool externs)
+{
+ char *buf;
+ int ret, i, nvars;
+ struct str_node *node;
+ struct variable_list *vls = NULL, *vl;
+ const char *var;
+
+ buf = synthesize_perf_probe_point(&pev->point);
+ if (!buf)
+ return -EINVAL;
+ pr_debug("Searching variables at %s\n", buf);
+
+ ret = debuginfo__find_available_vars_at(dinfo, pev, &vls,
+ max_vls, externs);
+ if (ret <= 0) {
+ pr_err("Failed to find variables at %s (%d)\n", buf, ret);
+ goto end;
+ }
+ /* Some variables are found */
+ fprintf(stdout, "Available variables at %s\n", buf);
+ for (i = 0; i < ret; i++) {
+ vl = &vls[i];
+ /*
+ * A probe point might be converted to
+ * several trace points.
+ */
+ fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol,
+ vl->point.offset);
+ free(vl->point.symbol);
+ nvars = 0;
+ if (vl->vars) {
+ strlist__for_each(node, vl->vars) {
+ var = strchr(node->s, '\t') + 1;
+ if (strfilter__compare(_filter, var)) {
+ fprintf(stdout, "\t\t%s\n", node->s);
+ nvars++;
+ }
+ }
+ strlist__delete(vl->vars);
+ }
+ if (nvars == 0)
+ fprintf(stdout, "\t\t(No matched variables)\n");
+ }
+ free(vls);
+end:
+ free(buf);
+ return ret;
+}
+
+/* Show available variables on given probe point */
+int show_available_vars(struct perf_probe_event *pevs, int npevs,
+ int max_vls, const char *module,
+ struct strfilter *_filter, bool externs)
+{
+ int i, ret = 0;
+ struct debuginfo *dinfo;
+
+ ret = init_vmlinux();
+ if (ret < 0)
+ return ret;
+
+ dinfo = open_debuginfo(module);
+ if (!dinfo) {
+ pr_warning("Failed to open debuginfo file.\n");
+ return -ENOENT;
+ }
+
+ setup_pager();
+
+ for (i = 0; i < npevs && ret >= 0; i++)
+ ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter,
+ externs);
+
+ debuginfo__delete(dinfo);
+ return ret;
+}
+
+#else /* !DWARF_SUPPORT */
+
+static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp,
+ struct perf_probe_point *pp)
+{
+ struct symbol *sym;
+
+ sym = __find_kernel_function_by_name(tp->symbol, NULL);
+ if (!sym) {
+ pr_err("Failed to find symbol %s in kernel.\n", tp->symbol);
+ return -ENOENT;
+ }
+ pp->function = strdup(tp->symbol);
+ if (pp->function == NULL)
+ return -ENOMEM;
+ pp->offset = tp->offset;
+ pp->retprobe = tp->retprobe;
+
+ return 0;
+}
+
+static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
+ struct probe_trace_event **tevs __unused,
+ int max_tevs __unused, const char *mod __unused)
+{
+ if (perf_probe_event_need_dwarf(pev)) {
+ pr_warning("Debuginfo-analysis is not supported.\n");
+ return -ENOSYS;
+ }
+ return 0;
+}
+
+int show_line_range(struct line_range *lr __unused, const char *module __unused)
+{
+ pr_warning("Debuginfo-analysis is not supported.\n");
+ return -ENOSYS;
+}
+
+int show_available_vars(struct perf_probe_event *pevs __unused,
+ int npevs __unused, int max_vls __unused,
+ const char *module __unused,
+ struct strfilter *filter __unused,
+ bool externs __unused)
+{
+ pr_warning("Debuginfo-analysis is not supported.\n");
+ return -ENOSYS;
+}
+#endif
+
+static int parse_line_num(char **ptr, int *val, const char *what)
+{
+ const char *start = *ptr;
+
+ errno = 0;
+ *val = strtol(*ptr, ptr, 0);
+ if (errno || *ptr == start) {
+ semantic_error("'%s' is not a valid number.\n", what);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * Stuff 'lr' according to the line range described by 'arg'.
+ * The line range syntax is described by:
+ *
+ * SRC[:SLN[+NUM|-ELN]]
+ * FNC[@SRC][:SLN[+NUM|-ELN]]
+ */
+int parse_line_range_desc(const char *arg, struct line_range *lr)
+{
+ char *range, *file, *name = strdup(arg);
+ int err;
+
+ if (!name)
+ return -ENOMEM;
+
+ lr->start = 0;
+ lr->end = INT_MAX;
+
+ range = strchr(name, ':');
+ if (range) {
+ *range++ = '\0';
+
+ err = parse_line_num(&range, &lr->start, "start line");
+ if (err)
+ goto err;
+
+ if (*range == '+' || *range == '-') {
+ const char c = *range++;
+
+ err = parse_line_num(&range, &lr->end, "end line");
+ if (err)
+ goto err;
+
+ if (c == '+') {
+ lr->end += lr->start;
+ /*
+ * Adjust the number of lines here.
+ * If the number of lines == 1, the
+ * the end of line should be equal to
+ * the start of line.
+ */
+ lr->end--;
+ }
+ }
+
+ pr_debug("Line range is %d to %d\n", lr->start, lr->end);
+
+ err = -EINVAL;
+ if (lr->start > lr->end) {
+ semantic_error("Start line must be smaller"
+ " than end line.\n");
+ goto err;
+ }
+ if (*range != '\0') {
+ semantic_error("Tailing with invalid str '%s'.\n", range);
+ goto err;
+ }
+ }
+
+ file = strchr(name, '@');
+ if (file) {
+ *file = '\0';
+ lr->file = strdup(++file);
+ if (lr->file == NULL) {
+ err = -ENOMEM;
+ goto err;
+ }
+ lr->function = name;
+ } else if (strchr(name, '.'))
+ lr->file = name;
+ else
+ lr->function = name;
+
+ return 0;
+err:
+ free(name);
+ return err;
+}
+
+/* Check the name is good for event/group */
+static bool check_event_name(const char *name)
+{
+ if (!isalpha(*name) && *name != '_')
+ return false;
+ while (*++name != '\0') {
+ if (!isalpha(*name) && !isdigit(*name) && *name != '_')
+ return false;
+ }
+ return true;
+}
+
+/* Parse probepoint definition. */
+static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
+{
+ struct perf_probe_point *pp = &pev->point;
+ char *ptr, *tmp;
+ char c, nc = 0;
+ /*
+ * <Syntax>
+ * perf probe [EVENT=]SRC[:LN|;PTN]
+ * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
+ *
+ * TODO:Group name support
+ */
+
+ ptr = strpbrk(arg, ";=@+%");
+ if (ptr && *ptr == '=') { /* Event name */
+ *ptr = '\0';
+ tmp = ptr + 1;
+ if (strchr(arg, ':')) {
+ semantic_error("Group name is not supported yet.\n");
+ return -ENOTSUP;
+ }
+ if (!check_event_name(arg)) {
+ semantic_error("%s is bad for event name -it must "
+ "follow C symbol-naming rule.\n", arg);
+ return -EINVAL;
+ }
+ pev->event = strdup(arg);
+ if (pev->event == NULL)
+ return -ENOMEM;
+ pev->group = NULL;
+ arg = tmp;
+ }
+
+ ptr = strpbrk(arg, ";:+@%");
+ if (ptr) {
+ nc = *ptr;
+ *ptr++ = '\0';
+ }
+
+ tmp = strdup(arg);
+ if (tmp == NULL)
+ return -ENOMEM;
+
+ /* Check arg is function or file and copy it */
+ if (strchr(tmp, '.')) /* File */
+ pp->file = tmp;
+ else /* Function */
+ pp->function = tmp;
+
+ /* Parse other options */
+ while (ptr) {
+ arg = ptr;
+ c = nc;
+ if (c == ';') { /* Lazy pattern must be the last part */
+ pp->lazy_line = strdup(arg);
+ if (pp->lazy_line == NULL)
+ return -ENOMEM;
+ break;
+ }
+ ptr = strpbrk(arg, ";:+@%");
+ if (ptr) {
+ nc = *ptr;
+ *ptr++ = '\0';
+ }
+ switch (c) {
+ case ':': /* Line number */
+ pp->line = strtoul(arg, &tmp, 0);
+ if (*tmp != '\0') {
+ semantic_error("There is non-digit char"
+ " in line number.\n");
+ return -EINVAL;
+ }
+ break;
+ case '+': /* Byte offset from a symbol */
+ pp->offset = strtoul(arg, &tmp, 0);
+ if (*tmp != '\0') {
+ semantic_error("There is non-digit character"
+ " in offset.\n");
+ return -EINVAL;
+ }
+ break;
+ case '@': /* File name */
+ if (pp->file) {
+ semantic_error("SRC@SRC is not allowed.\n");
+ return -EINVAL;
+ }
+ pp->file = strdup(arg);
+ if (pp->file == NULL)
+ return -ENOMEM;
+ break;
+ case '%': /* Probe places */
+ if (strcmp(arg, "return") == 0) {
+ pp->retprobe = 1;
+ } else { /* Others not supported yet */
+ semantic_error("%%%s is not supported.\n", arg);
+ return -ENOTSUP;
+ }
+ break;
+ default: /* Buggy case */
+ pr_err("This program has a bug at %s:%d.\n",
+ __FILE__, __LINE__);
+ return -ENOTSUP;
+ break;
+ }
+ }
+
+ /* Exclusion check */
+ if (pp->lazy_line && pp->line) {
+ semantic_error("Lazy pattern can't be used with"
+ " line number.\n");
+ return -EINVAL;
+ }
+
+ if (pp->lazy_line && pp->offset) {
+ semantic_error("Lazy pattern can't be used with offset.\n");
+ return -EINVAL;
+ }
+
+ if (pp->line && pp->offset) {
+ semantic_error("Offset can't be used with line number.\n");
+ return -EINVAL;
+ }
+
+ if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
+ semantic_error("File always requires line number or "
+ "lazy pattern.\n");
+ return -EINVAL;
+ }
+
+ if (pp->offset && !pp->function) {
+ semantic_error("Offset requires an entry function.\n");
+ return -EINVAL;
+ }
+
+ if (pp->retprobe && !pp->function) {
+ semantic_error("Return probe requires an entry function.\n");
+ return -EINVAL;
+ }
+
+ if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
+ semantic_error("Offset/Line/Lazy pattern can't be used with "
+ "return probe.\n");
+ return -EINVAL;
+ }
+
+ pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
+ pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
+ pp->lazy_line);
+ return 0;
+}
+
+/* Parse perf-probe event argument */
+static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
+{
+ char *tmp, *goodname;
+ struct perf_probe_arg_field **fieldp;
+
+ pr_debug("parsing arg: %s into ", str);
+
+ tmp = strchr(str, '=');
+ if (tmp) {
+ arg->name = strndup(str, tmp - str);
+ if (arg->name == NULL)
+ return -ENOMEM;
+ pr_debug("name:%s ", arg->name);
+ str = tmp + 1;
+ }
+
+ tmp = strchr(str, ':');
+ if (tmp) { /* Type setting */
+ *tmp = '\0';
+ arg->type = strdup(tmp + 1);
+ if (arg->type == NULL)
+ return -ENOMEM;
+ pr_debug("type:%s ", arg->type);
+ }
+
+ tmp = strpbrk(str, "-.[");
+ if (!is_c_varname(str) || !tmp) {
+ /* A variable, register, symbol or special value */
+ arg->var = strdup(str);
+ if (arg->var == NULL)
+ return -ENOMEM;
+ pr_debug("%s\n", arg->var);
+ return 0;
+ }
+
+ /* Structure fields or array element */
+ arg->var = strndup(str, tmp - str);
+ if (arg->var == NULL)
+ return -ENOMEM;
+ goodname = arg->var;
+ pr_debug("%s, ", arg->var);
+ fieldp = &arg->field;
+
+ do {
+ *fieldp = zalloc(sizeof(struct perf_probe_arg_field));
+ if (*fieldp == NULL)
+ return -ENOMEM;
+ if (*tmp == '[') { /* Array */
+ str = tmp;
+ (*fieldp)->index = strtol(str + 1, &tmp, 0);
+ (*fieldp)->ref = true;
+ if (*tmp != ']' || tmp == str + 1) {
+ semantic_error("Array index must be a"
+ " number.\n");
+ return -EINVAL;
+ }
+ tmp++;
+ if (*tmp == '\0')
+ tmp = NULL;
+ } else { /* Structure */
+ if (*tmp == '.') {
+ str = tmp + 1;
+ (*fieldp)->ref = false;
+ } else if (tmp[1] == '>') {
+ str = tmp + 2;
+ (*fieldp)->ref = true;
+ } else {
+ semantic_error("Argument parse error: %s\n",
+ str);
+ return -EINVAL;
+ }
+ tmp = strpbrk(str, "-.[");
+ }
+ if (tmp) {
+ (*fieldp)->name = strndup(str, tmp - str);
+ if ((*fieldp)->name == NULL)
+ return -ENOMEM;
+ if (*str != '[')
+ goodname = (*fieldp)->name;
+ pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
+ fieldp = &(*fieldp)->next;
+ }
+ } while (tmp);
+ (*fieldp)->name = strdup(str);
+ if ((*fieldp)->name == NULL)
+ return -ENOMEM;
+ if (*str != '[')
+ goodname = (*fieldp)->name;
+ pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
+
+ /* If no name is specified, set the last field name (not array index)*/
+ if (!arg->name) {
+ arg->name = strdup(goodname);
+ if (arg->name == NULL)
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+/* Parse perf-probe event command */
+int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
+{
+ char **argv;
+ int argc, i, ret = 0;
+
+ argv = argv_split(cmd, &argc);
+ if (!argv) {
+ pr_debug("Failed to split arguments.\n");
+ return -ENOMEM;
+ }
+ if (argc - 1 > MAX_PROBE_ARGS) {
+ semantic_error("Too many probe arguments (%d).\n", argc - 1);
+ ret = -ERANGE;
+ goto out;
+ }
+ /* Parse probe point */
+ ret = parse_perf_probe_point(argv[0], pev);
+ if (ret < 0)
+ goto out;
+
+ /* Copy arguments and ensure return probe has no C argument */
+ pev->nargs = argc - 1;
+ pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
+ if (pev->args == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ for (i = 0; i < pev->nargs && ret >= 0; i++) {
+ ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
+ if (ret >= 0 &&
+ is_c_varname(pev->args[i].var) && pev->point.retprobe) {
+ semantic_error("You can't specify local variable for"
+ " kretprobe.\n");
+ ret = -EINVAL;
+ }
+ }
+out:
+ argv_free(argv);
+
+ return ret;
+}
+
+/* Return true if this perf_probe_event requires debuginfo */
+bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
+{
+ int i;
+
+ if (pev->point.file || pev->point.line || pev->point.lazy_line)
+ return true;
+
+ for (i = 0; i < pev->nargs; i++)
+ if (is_c_varname(pev->args[i].var))
+ return true;
+
+ return false;
+}
+
+/* Parse probe_events event into struct probe_point */
+static int parse_probe_trace_command(const char *cmd,
+ struct probe_trace_event *tev)
+{
+ struct probe_trace_point *tp = &tev->point;
+ char pr;
+ char *p;
+ int ret, i, argc;
+ char **argv;
+
+ pr_debug("Parsing probe_events: %s\n", cmd);
+ argv = argv_split(cmd, &argc);
+ if (!argv) {
+ pr_debug("Failed to split arguments.\n");
+ return -ENOMEM;
+ }
+ if (argc < 2) {
+ semantic_error("Too few probe arguments.\n");
+ ret = -ERANGE;
+ goto out;
+ }
+
+ /* Scan event and group name. */
+ ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]",
+ &pr, (float *)(void *)&tev->group,
+ (float *)(void *)&tev->event);
+ if (ret != 3) {
+ semantic_error("Failed to parse event name: %s\n", argv[0]);
+ ret = -EINVAL;
+ goto out;
+ }
+ pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
+
+ tp->retprobe = (pr == 'r');
+
+ /* Scan module name(if there), function name and offset */
+ p = strchr(argv[1], ':');
+ if (p) {
+ tp->module = strndup(argv[1], p - argv[1]);
+ p++;
+ } else
+ p = argv[1];
+ ret = sscanf(p, "%a[^+]+%lu", (float *)(void *)&tp->symbol,
+ &tp->offset);
+ if (ret == 1)
+ tp->offset = 0;
+
+ tev->nargs = argc - 2;
+ tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
+ if (tev->args == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ for (i = 0; i < tev->nargs; i++) {
+ p = strchr(argv[i + 2], '=');
+ if (p) /* We don't need which register is assigned. */
+ *p++ = '\0';
+ else
+ p = argv[i + 2];
+ tev->args[i].name = strdup(argv[i + 2]);
+ /* TODO: parse regs and offset */
+ tev->args[i].value = strdup(p);
+ if (tev->args[i].name == NULL || tev->args[i].value == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ }
+ ret = 0;
+out:
+ argv_free(argv);
+ return ret;
+}
+
+/* Compose only probe arg */
+int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len)
+{
+ struct perf_probe_arg_field *field = pa->field;
+ int ret;
+ char *tmp = buf;
+
+ if (pa->name && pa->var)
+ ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var);
+ else
+ ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var);
+ if (ret <= 0)
+ goto error;
+ tmp += ret;
+ len -= ret;
+
+ while (field) {
+ if (field->name[0] == '[')
+ ret = e_snprintf(tmp, len, "%s", field->name);
+ else
+ ret = e_snprintf(tmp, len, "%s%s",
+ field->ref ? "->" : ".", field->name);
+ if (ret <= 0)
+ goto error;
+ tmp += ret;
+ len -= ret;
+ field = field->next;
+ }
+
+ if (pa->type) {
+ ret = e_snprintf(tmp, len, ":%s", pa->type);
+ if (ret <= 0)
+ goto error;
+ tmp += ret;
+ len -= ret;
+ }
+
+ return tmp - buf;
+error:
+ pr_debug("Failed to synthesize perf probe argument: %s\n",
+ strerror(-ret));
+ return ret;
+}
+
+/* Compose only probe point (not argument) */
+static char *synthesize_perf_probe_point(struct perf_probe_point *pp)
+{
+ char *buf, *tmp;
+ char offs[32] = "", line[32] = "", file[32] = "";
+ int ret, len;
+
+ buf = zalloc(MAX_CMDLEN);
+ if (buf == NULL) {
+ ret = -ENOMEM;
+ goto error;
+ }
+ if (pp->offset) {
+ ret = e_snprintf(offs, 32, "+%lu", pp->offset);
+ if (ret <= 0)
+ goto error;
+ }
+ if (pp->line) {
+ ret = e_snprintf(line, 32, ":%d", pp->line);
+ if (ret <= 0)
+ goto error;
+ }
+ if (pp->file) {
+ tmp = pp->file;
+ len = strlen(tmp);
+ if (len > 30) {
+ tmp = strchr(pp->file + len - 30, '/');
+ tmp = tmp ? tmp + 1 : pp->file + len - 30;
+ }
+ ret = e_snprintf(file, 32, "@%s", tmp);
+ if (ret <= 0)
+ goto error;
+ }
+
+ if (pp->function)
+ ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function,
+ offs, pp->retprobe ? "%return" : "", line,
+ file);
+ else
+ ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line);
+ if (ret <= 0)
+ goto error;
+
+ return buf;
+error:
+ pr_debug("Failed to synthesize perf probe point: %s\n",
+ strerror(-ret));
+ if (buf)
+ free(buf);
+ return NULL;
+}
+
+#if 0
+char *synthesize_perf_probe_command(struct perf_probe_event *pev)
+{
+ char *buf;
+ int i, len, ret;
+
+ buf = synthesize_perf_probe_point(&pev->point);
+ if (!buf)
+ return NULL;
+
+ len = strlen(buf);
+ for (i = 0; i < pev->nargs; i++) {
+ ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
+ pev->args[i].name);
+ if (ret <= 0) {
+ free(buf);
+ return NULL;
+ }
+ len += ret;
+ }
+
+ return buf;
+}
+#endif
+
+static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref,
+ char **buf, size_t *buflen,
+ int depth)
+{
+ int ret;
+ if (ref->next) {
+ depth = __synthesize_probe_trace_arg_ref(ref->next, buf,
+ buflen, depth + 1);
+ if (depth < 0)
+ goto out;
+ }
+
+ ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset);
+ if (ret < 0)
+ depth = ret;
+ else {
+ *buf += ret;
+ *buflen -= ret;
+ }
+out:
+ return depth;
+
+}
+
+static int synthesize_probe_trace_arg(struct probe_trace_arg *arg,
+ char *buf, size_t buflen)
+{
+ struct probe_trace_arg_ref *ref = arg->ref;
+ int ret, depth = 0;
+ char *tmp = buf;
+
+ /* Argument name or separator */
+ if (arg->name)
+ ret = e_snprintf(buf, buflen, " %s=", arg->name);
+ else
+ ret = e_snprintf(buf, buflen, " ");
+ if (ret < 0)
+ return ret;
+ buf += ret;
+ buflen -= ret;
+
+ /* Special case: @XXX */
+ if (arg->value[0] == '@' && arg->ref)
+ ref = ref->next;
+
+ /* Dereferencing arguments */
+ if (ref) {
+ depth = __synthesize_probe_trace_arg_ref(ref, &buf,
+ &buflen, 1);
+ if (depth < 0)
+ return depth;
+ }
+
+ /* Print argument value */
+ if (arg->value[0] == '@' && arg->ref)
+ ret = e_snprintf(buf, buflen, "%s%+ld", arg->value,
+ arg->ref->offset);
+ else
+ ret = e_snprintf(buf, buflen, "%s", arg->value);
+ if (ret < 0)
+ return ret;
+ buf += ret;
+ buflen -= ret;
+
+ /* Closing */
+ while (depth--) {
+ ret = e_snprintf(buf, buflen, ")");
+ if (ret < 0)
+ return ret;
+ buf += ret;
+ buflen -= ret;
+ }
+ /* Print argument type */
+ if (arg->type) {
+ ret = e_snprintf(buf, buflen, ":%s", arg->type);
+ if (ret <= 0)
+ return ret;
+ buf += ret;
+ }
+
+ return buf - tmp;
+}
+
+char *synthesize_probe_trace_command(struct probe_trace_event *tev)
+{
+ struct probe_trace_point *tp = &tev->point;
+ char *buf;
+ int i, len, ret;
+
+ buf = zalloc(MAX_CMDLEN);
+ if (buf == NULL)
+ return NULL;
+
+ len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s%s%s+%lu",
+ tp->retprobe ? 'r' : 'p',
+ tev->group, tev->event,
+ tp->module ?: "", tp->module ? ":" : "",
+ tp->symbol, tp->offset);
+ if (len <= 0)
+ goto error;
+
+ for (i = 0; i < tev->nargs; i++) {
+ ret = synthesize_probe_trace_arg(&tev->args[i], buf + len,
+ MAX_CMDLEN - len);
+ if (ret <= 0)
+ goto error;
+ len += ret;
+ }
+
+ return buf;
+error:
+ free(buf);
+ return NULL;
+}
+
+static int convert_to_perf_probe_event(struct probe_trace_event *tev,
+ struct perf_probe_event *pev)
+{
+ char buf[64] = "";
+ int i, ret;
+
+ /* Convert event/group name */
+ pev->event = strdup(tev->event);
+ pev->group = strdup(tev->group);
+ if (pev->event == NULL || pev->group == NULL)
+ return -ENOMEM;
+
+ /* Convert trace_point to probe_point */
+ ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point);
+ if (ret < 0)
+ return ret;
+
+ /* Convert trace_arg to probe_arg */
+ pev->nargs = tev->nargs;
+ pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
+ if (pev->args == NULL)
+ return -ENOMEM;
+ for (i = 0; i < tev->nargs && ret >= 0; i++) {
+ if (tev->args[i].name)
+ pev->args[i].name = strdup(tev->args[i].name);
+ else {
+ ret = synthesize_probe_trace_arg(&tev->args[i],
+ buf, 64);
+ pev->args[i].name = strdup(buf);
+ }
+ if (pev->args[i].name == NULL && ret >= 0)
+ ret = -ENOMEM;
+ }
+
+ if (ret < 0)
+ clear_perf_probe_event(pev);
+
+ return ret;
+}
+
+void clear_perf_probe_event(struct perf_probe_event *pev)
+{
+ struct perf_probe_point *pp = &pev->point;
+ struct perf_probe_arg_field *field, *next;
+ int i;
+
+ if (pev->event)
+ free(pev->event);
+ if (pev->group)
+ free(pev->group);
+ if (pp->file)
+ free(pp->file);
+ if (pp->function)
+ free(pp->function);
+ if (pp->lazy_line)
+ free(pp->lazy_line);
+ for (i = 0; i < pev->nargs; i++) {
+ if (pev->args[i].name)
+ free(pev->args[i].name);
+ if (pev->args[i].var)
+ free(pev->args[i].var);
+ if (pev->args[i].type)
+ free(pev->args[i].type);
+ field = pev->args[i].field;
+ while (field) {
+ next = field->next;
+ if (field->name)
+ free(field->name);
+ free(field);
+ field = next;
+ }
+ }
+ if (pev->args)
+ free(pev->args);
+ memset(pev, 0, sizeof(*pev));
+}
+
+static void clear_probe_trace_event(struct probe_trace_event *tev)
+{
+ struct probe_trace_arg_ref *ref, *next;
+ int i;
+
+ if (tev->event)
+ free(tev->event);
+ if (tev->group)
+ free(tev->group);
+ if (tev->point.symbol)
+ free(tev->point.symbol);
+ if (tev->point.module)
+ free(tev->point.module);
+ for (i = 0; i < tev->nargs; i++) {
+ if (tev->args[i].name)
+ free(tev->args[i].name);
+ if (tev->args[i].value)
+ free(tev->args[i].value);
+ if (tev->args[i].type)
+ free(tev->args[i].type);
+ ref = tev->args[i].ref;
+ while (ref) {
+ next = ref->next;
+ free(ref);
+ ref = next;
+ }
+ }
+ if (tev->args)
+ free(tev->args);
+ memset(tev, 0, sizeof(*tev));
+}
+
+static int open_kprobe_events(bool readwrite)
+{
+ char buf[PATH_MAX];
+ const char *__debugfs;
+ int ret;
+
+ __debugfs = debugfs_find_mountpoint();
+ if (__debugfs == NULL) {
+ pr_warning("Debugfs is not mounted.\n");
+ return -ENOENT;
+ }
+
+ ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs);
+ if (ret >= 0) {
+ pr_debug("Opening %s write=%d\n", buf, readwrite);
+ if (readwrite && !probe_event_dry_run)
+ ret = open(buf, O_RDWR, O_APPEND);
+ else
+ ret = open(buf, O_RDONLY, 0);
+ }
+
+ if (ret < 0) {
+ if (errno == ENOENT)
+ pr_warning("kprobe_events file does not exist - please"
+ " rebuild kernel with CONFIG_KPROBE_EVENT.\n");
+ else
+ pr_warning("Failed to open kprobe_events file: %s\n",
+ strerror(errno));
+ }
+ return ret;
+}
+
+/* Get raw string list of current kprobe_events */
+static struct strlist *get_probe_trace_command_rawlist(int fd)
+{
+ int ret, idx;
+ FILE *fp;
+ char buf[MAX_CMDLEN];
+ char *p;
+ struct strlist *sl;
+
+ sl = strlist__new(true, NULL);
+
+ fp = fdopen(dup(fd), "r");
+ while (!feof(fp)) {
+ p = fgets(buf, MAX_CMDLEN, fp);
+ if (!p)
+ break;
+
+ idx = strlen(p) - 1;
+ if (p[idx] == '\n')
+ p[idx] = '\0';
+ ret = strlist__add(sl, buf);
+ if (ret < 0) {
+ pr_debug("strlist__add failed: %s\n", strerror(-ret));
+ strlist__delete(sl);
+ return NULL;
+ }
+ }
+ fclose(fp);
+
+ return sl;
+}
+
+/* Show an event */
+static int show_perf_probe_event(struct perf_probe_event *pev)
+{
+ int i, ret;
+ char buf[128];
+ char *place;
+
+ /* Synthesize only event probe point */
+ place = synthesize_perf_probe_point(&pev->point);
+ if (!place)
+ return -EINVAL;
+
+ ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event);
+ if (ret < 0)
+ return ret;
+
+ printf(" %-20s (on %s", buf, place);
+
+ if (pev->nargs > 0) {
+ printf(" with");
+ for (i = 0; i < pev->nargs; i++) {
+ ret = synthesize_perf_probe_arg(&pev->args[i],
+ buf, 128);
+ if (ret < 0)
+ break;
+ printf(" %s", buf);
+ }
+ }
+ printf(")\n");
+ free(place);
+ return ret;
+}
+
+/* List up current perf-probe events */
+int show_perf_probe_events(void)
+{
+ int fd, ret;
+ struct probe_trace_event tev;
+ struct perf_probe_event pev;
+ struct strlist *rawlist;
+ struct str_node *ent;
+
+ setup_pager();
+ ret = init_vmlinux();
+ if (ret < 0)
+ return ret;
+
+ memset(&tev, 0, sizeof(tev));
+ memset(&pev, 0, sizeof(pev));
+
+ fd = open_kprobe_events(false);
+ if (fd < 0)
+ return fd;
+
+ rawlist = get_probe_trace_command_rawlist(fd);
+ close(fd);
+ if (!rawlist)
+ return -ENOENT;
+
+ strlist__for_each(ent, rawlist) {
+ ret = parse_probe_trace_command(ent->s, &tev);
+ if (ret >= 0) {
+ ret = convert_to_perf_probe_event(&tev, &pev);
+ if (ret >= 0)
+ ret = show_perf_probe_event(&pev);
+ }
+ clear_perf_probe_event(&pev);
+ clear_probe_trace_event(&tev);
+ if (ret < 0)
+ break;
+ }
+ strlist__delete(rawlist);
+
+ return ret;
+}
+
+/* Get current perf-probe event names */
+static struct strlist *get_probe_trace_event_names(int fd, bool include_group)
+{
+ char buf[128];
+ struct strlist *sl, *rawlist;
+ struct str_node *ent;
+ struct probe_trace_event tev;
+ int ret = 0;
+
+ memset(&tev, 0, sizeof(tev));
+ rawlist = get_probe_trace_command_rawlist(fd);
+ sl = strlist__new(true, NULL);
+ strlist__for_each(ent, rawlist) {
+ ret = parse_probe_trace_command(ent->s, &tev);
+ if (ret < 0)
+ break;
+ if (include_group) {
+ ret = e_snprintf(buf, 128, "%s:%s", tev.group,
+ tev.event);
+ if (ret >= 0)
+ ret = strlist__add(sl, buf);
+ } else
+ ret = strlist__add(sl, tev.event);
+ clear_probe_trace_event(&tev);
+ if (ret < 0)
+ break;
+ }
+ strlist__delete(rawlist);
+
+ if (ret < 0) {
+ strlist__delete(sl);
+ return NULL;
+ }
+ return sl;
+}
+
+static int write_probe_trace_event(int fd, struct probe_trace_event *tev)
+{
+ int ret = 0;
+ char *buf = synthesize_probe_trace_command(tev);
+
+ if (!buf) {
+ pr_debug("Failed to synthesize probe trace event.\n");
+ return -EINVAL;
+ }
+
+ pr_debug("Writing event: %s\n", buf);
+ if (!probe_event_dry_run) {
+ ret = write(fd, buf, strlen(buf));
+ if (ret <= 0)
+ pr_warning("Failed to write event: %s\n",
+ strerror(errno));
+ }
+ free(buf);
+ return ret;
+}
+
+static int get_new_event_name(char *buf, size_t len, const char *base,
+ struct strlist *namelist, bool allow_suffix)
+{
+ int i, ret;
+
+ /* Try no suffix */
+ ret = e_snprintf(buf, len, "%s", base);
+ if (ret < 0) {
+ pr_debug("snprintf() failed: %s\n", strerror(-ret));
+ return ret;
+ }
+ if (!strlist__has_entry(namelist, buf))
+ return 0;
+
+ if (!allow_suffix) {
+ pr_warning("Error: event \"%s\" already exists. "
+ "(Use -f to force duplicates.)\n", base);
+ return -EEXIST;
+ }
+
+ /* Try to add suffix */
+ for (i = 1; i < MAX_EVENT_INDEX; i++) {
+ ret = e_snprintf(buf, len, "%s_%d", base, i);
+ if (ret < 0) {
+ pr_debug("snprintf() failed: %s\n", strerror(-ret));
+ return ret;
+ }
+ if (!strlist__has_entry(namelist, buf))
+ break;
+ }
+ if (i == MAX_EVENT_INDEX) {
+ pr_warning("Too many events are on the same function.\n");
+ ret = -ERANGE;
+ }
+
+ return ret;
+}
+
+static int __add_probe_trace_events(struct perf_probe_event *pev,
+ struct probe_trace_event *tevs,
+ int ntevs, bool allow_suffix)
+{
+ int i, fd, ret;
+ struct probe_trace_event *tev = NULL;
+ char buf[64];
+ const char *event, *group;
+ struct strlist *namelist;
+
+ fd = open_kprobe_events(true);
+ if (fd < 0)
+ return fd;
+ /* Get current event names */
+ namelist = get_probe_trace_event_names(fd, false);
+ if (!namelist) {
+ pr_debug("Failed to get current event list.\n");
+ return -EIO;
+ }
+
+ ret = 0;
+ printf("Added new event%s\n", (ntevs > 1) ? "s:" : ":");
+ for (i = 0; i < ntevs; i++) {
+ tev = &tevs[i];
+ if (pev->event)
+ event = pev->event;
+ else
+ if (pev->point.function)
+ event = pev->point.function;
+ else
+ event = tev->point.symbol;
+ if (pev->group)
+ group = pev->group;
+ else
+ group = PERFPROBE_GROUP;
+
+ /* Get an unused new event name */
+ ret = get_new_event_name(buf, 64, event,
+ namelist, allow_suffix);
+ if (ret < 0)
+ break;
+ event = buf;
+
+ tev->event = strdup(event);
+ tev->group = strdup(group);
+ if (tev->event == NULL || tev->group == NULL) {
+ ret = -ENOMEM;
+ break;
+ }
+ ret = write_probe_trace_event(fd, tev);
+ if (ret < 0)
+ break;
+ /* Add added event name to namelist */
+ strlist__add(namelist, event);
+
+ /* Trick here - save current event/group */
+ event = pev->event;
+ group = pev->group;
+ pev->event = tev->event;
+ pev->group = tev->group;
+ show_perf_probe_event(pev);
+ /* Trick here - restore current event/group */
+ pev->event = (char *)event;
+ pev->group = (char *)group;
+
+ /*
+ * Probes after the first probe which comes from same
+ * user input are always allowed to add suffix, because
+ * there might be several addresses corresponding to
+ * one code line.
+ */
+ allow_suffix = true;
+ }
+
+ if (ret >= 0) {
+ /* Show how to use the event. */
+ printf("\nYou can now use it in all perf tools, such as:\n\n");
+ printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group,
+ tev->event);
+ }
+
+ strlist__delete(namelist);
+ close(fd);
+ return ret;
+}
+
+static int convert_to_probe_trace_events(struct perf_probe_event *pev,
+ struct probe_trace_event **tevs,
+ int max_tevs, const char *target)
+{
+ struct symbol *sym;
+ int ret = 0, i;
+ struct probe_trace_event *tev;
+
+ /* Convert perf_probe_event with debuginfo */
+ ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target);
+ if (ret != 0)
+ return ret; /* Found in debuginfo or got an error */
+
+ /* Allocate trace event buffer */
+ tev = *tevs = zalloc(sizeof(struct probe_trace_event));
+ if (tev == NULL)
+ return -ENOMEM;
+
+ /* Copy parameters */
+ tev->point.symbol = strdup(pev->point.function);
+ if (tev->point.symbol == NULL) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ if (target) {
+ tev->point.module = strdup(target);
+ if (tev->point.module == NULL) {
+ ret = -ENOMEM;
+ goto error;
+ }
+ }
+
+ tev->point.offset = pev->point.offset;
+ tev->point.retprobe = pev->point.retprobe;
+ tev->nargs = pev->nargs;
+ if (tev->nargs) {
+ tev->args = zalloc(sizeof(struct probe_trace_arg)
+ * tev->nargs);
+ if (tev->args == NULL) {
+ ret = -ENOMEM;
+ goto error;
+ }
+ for (i = 0; i < tev->nargs; i++) {
+ if (pev->args[i].name) {
+ tev->args[i].name = strdup(pev->args[i].name);
+ if (tev->args[i].name == NULL) {
+ ret = -ENOMEM;
+ goto error;
+ }
+ }
+ tev->args[i].value = strdup(pev->args[i].var);
+ if (tev->args[i].value == NULL) {
+ ret = -ENOMEM;
+ goto error;
+ }
+ if (pev->args[i].type) {
+ tev->args[i].type = strdup(pev->args[i].type);
+ if (tev->args[i].type == NULL) {
+ ret = -ENOMEM;
+ goto error;
+ }
+ }
+ }
+ }
+
+ /* Currently just checking function name from symbol map */
+ sym = __find_kernel_function_by_name(tev->point.symbol, NULL);
+ if (!sym) {
+ pr_warning("Kernel symbol \'%s\' not found.\n",
+ tev->point.symbol);
+ ret = -ENOENT;
+ goto error;
+ } else if (tev->point.offset > sym->end - sym->start) {
+ pr_warning("Offset specified is greater than size of %s\n",
+ tev->point.symbol);
+ ret = -ENOENT;
+ goto error;
+
+ }
+
+ return 1;
+error:
+ clear_probe_trace_event(tev);
+ free(tev);
+ *tevs = NULL;
+ return ret;
+}
+
+struct __event_package {
+ struct perf_probe_event *pev;
+ struct probe_trace_event *tevs;
+ int ntevs;
+};
+
+int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
+ int max_tevs, const char *target, bool force_add)
+{
+ int i, j, ret;
+ struct __event_package *pkgs;
+
+ pkgs = zalloc(sizeof(struct __event_package) * npevs);
+ if (pkgs == NULL)
+ return -ENOMEM;
+
+ /* Init vmlinux path */
+ ret = init_vmlinux();
+ if (ret < 0) {
+ free(pkgs);
+ return ret;
+ }
+
+ /* Loop 1: convert all events */
+ for (i = 0; i < npevs; i++) {
+ pkgs[i].pev = &pevs[i];
+ /* Convert with or without debuginfo */
+ ret = convert_to_probe_trace_events(pkgs[i].pev,
+ &pkgs[i].tevs,
+ max_tevs,
+ target);
+ if (ret < 0)
+ goto end;
+ pkgs[i].ntevs = ret;
+ }
+
+ /* Loop 2: add all events */
+ for (i = 0; i < npevs; i++) {
+ ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs,
+ pkgs[i].ntevs, force_add);
+ if (ret < 0)
+ break;
+ }
+end:
+ /* Loop 3: cleanup and free trace events */
+ for (i = 0; i < npevs; i++) {
+ for (j = 0; j < pkgs[i].ntevs; j++)
+ clear_probe_trace_event(&pkgs[i].tevs[j]);
+ free(pkgs[i].tevs);
+ }
+ free(pkgs);
+
+ return ret;
+}
+
+static int __del_trace_probe_event(int fd, struct str_node *ent)
+{
+ char *p;
+ char buf[128];
+ int ret;
+
+ /* Convert from perf-probe event to trace-probe event */
+ ret = e_snprintf(buf, 128, "-:%s", ent->s);
+ if (ret < 0)
+ goto error;
+
+ p = strchr(buf + 2, ':');
+ if (!p) {
+ pr_debug("Internal error: %s should have ':' but not.\n",
+ ent->s);
+ ret = -ENOTSUP;
+ goto error;
+ }
+ *p = '/';
+
+ pr_debug("Writing event: %s\n", buf);
+ ret = write(fd, buf, strlen(buf));
+ if (ret < 0) {
+ ret = -errno;
+ goto error;
+ }
+
+ printf("Removed event: %s\n", ent->s);
+ return 0;
+error:
+ pr_warning("Failed to delete event: %s\n", strerror(-ret));
+ return ret;
+}
+
+static int del_trace_probe_event(int fd, const char *group,
+ const char *event, struct strlist *namelist)
+{
+ char buf[128];
+ struct str_node *ent, *n;
+ int found = 0, ret = 0;
+
+ ret = e_snprintf(buf, 128, "%s:%s", group, event);
+ if (ret < 0) {
+ pr_err("Failed to copy event.\n");
+ return ret;
+ }
+
+ if (strpbrk(buf, "*?")) { /* Glob-exp */
+ strlist__for_each_safe(ent, n, namelist)
+ if (strglobmatch(ent->s, buf)) {
+ found++;
+ ret = __del_trace_probe_event(fd, ent);
+ if (ret < 0)
+ break;
+ strlist__remove(namelist, ent);
+ }
+ } else {
+ ent = strlist__find(namelist, buf);
+ if (ent) {
+ found++;
+ ret = __del_trace_probe_event(fd, ent);
+ if (ret >= 0)
+ strlist__remove(namelist, ent);
+ }
+ }
+ if (found == 0 && ret >= 0)
+ pr_info("Info: Event \"%s\" does not exist.\n", buf);
+
+ return ret;
+}
+
+int del_perf_probe_events(struct strlist *dellist)
+{
+ int fd, ret = 0;
+ const char *group, *event;
+ char *p, *str;
+ struct str_node *ent;
+ struct strlist *namelist;
+
+ fd = open_kprobe_events(true);
+ if (fd < 0)
+ return fd;
+
+ /* Get current event names */
+ namelist = get_probe_trace_event_names(fd, true);
+ if (namelist == NULL)
+ return -EINVAL;
+
+ strlist__for_each(ent, dellist) {
+ str = strdup(ent->s);
+ if (str == NULL) {
+ ret = -ENOMEM;
+ break;
+ }
+ pr_debug("Parsing: %s\n", str);
+ p = strchr(str, ':');
+ if (p) {
+ group = str;
+ *p = '\0';
+ event = p + 1;
+ } else {
+ group = "*";
+ event = str;
+ }
+ pr_debug("Group: %s, Event: %s\n", group, event);
+ ret = del_trace_probe_event(fd, group, event, namelist);
+ free(str);
+ if (ret < 0)
+ break;
+ }
+ strlist__delete(namelist);
+ close(fd);
+
+ return ret;
+}
+/* TODO: don't use a global variable for filter ... */
+static struct strfilter *available_func_filter;
+
+/*
+ * If a symbol corresponds to a function with global binding and
+ * matches filter return 0. For all others return 1.
+ */
+static int filter_available_functions(struct map *map __unused,
+ struct symbol *sym)
+{
+ if (sym->binding == STB_GLOBAL &&
+ strfilter__compare(available_func_filter, sym->name))
+ return 0;
+ return 1;
+}
+
+int show_available_funcs(const char *target, struct strfilter *_filter)
+{
+ struct map *map;
+ int ret;
+
+ setup_pager();
+
+ ret = init_vmlinux();
+ if (ret < 0)
+ return ret;
+
+ map = kernel_get_module_map(target);
+ if (!map) {
+ pr_err("Failed to find %s map.\n", (target) ? : "kernel");
+ return -EINVAL;
+ }
+ available_func_filter = _filter;
+ if (map__load(map, filter_available_functions)) {
+ pr_err("Failed to load map.\n");
+ return -EINVAL;
+ }
+ if (!dso__sorted_by_name(map->dso, map->type))
+ dso__sort_by_name(map->dso, map->type);
+
+ dso__fprintf_symbols_by_name(map->dso, map->type, stdout);
+ return 0;
+}