#include <limits.h>
#undef _GNU_SOURCE
+#include "util.h"
#include "event.h"
#include "string.h"
#include "strlist.h"
#include "debug.h"
#include "cache.h"
#include "color.h"
-#include "parse-events.h" /* For debugfs_path */
+#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"
-#define semantic_error(msg ...) die("Semantic error :" msg)
+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, ...)
return ret;
}
-void parse_line_range_desc(const char *arg, struct line_range *lr)
+static char *synthesize_perf_probe_point(struct perf_probe_point *pp);
+static struct machine machine;
+
+/* Initialize symbol maps and path of vmlinux */
+static int init_vmlinux(void)
+{
+ struct dso *kernel;
+ 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, "/", 0);
+ if (ret < 0)
+ goto out;
+
+ kernel = dso__new_kernel(symbol_conf.vmlinux_name);
+ if (kernel == NULL)
+ die("Failed to create kernel dso.");
+
+ ret = __machine__create_kernel_maps(&machine, kernel);
+ if (ret < 0)
+ pr_debug("Failed to create kernel maps.\n");
+
+out:
+ if (ret < 0)
+ pr_warning("Failed to init vmlinux path.\n");
+ return ret;
+}
+
+#ifdef DWARF_SUPPORT
+static int open_vmlinux(void)
+{
+ if (map__load(machine.vmlinux_maps[MAP__FUNCTION], NULL) < 0) {
+ pr_debug("Failed to load kernel map.\n");
+ return -EINVAL;
+ }
+ pr_debug("Try to open %s\n", machine.vmlinux_maps[MAP__FUNCTION]->dso->long_name);
+ return open(machine.vmlinux_maps[MAP__FUNCTION]->dso->long_name, O_RDONLY);
+}
+
+/* Convert trace point to probe point with debuginfo */
+static int convert_to_perf_probe_point(struct kprobe_trace_point *tp,
+ struct perf_probe_point *pp)
+{
+ struct symbol *sym;
+ int fd, ret = -ENOENT;
+
+ sym = map__find_symbol_by_name(machine.vmlinux_maps[MAP__FUNCTION],
+ tp->symbol, NULL);
+ if (sym) {
+ fd = open_vmlinux();
+ if (fd >= 0) {
+ ret = find_perf_probe_point(fd,
+ sym->start + tp->offset, pp);
+ close(fd);
+ }
+ }
+ 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;
+}
+
+/* Try to find perf_probe_event with debuginfo */
+static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev,
+ struct kprobe_trace_event **tevs,
+ int max_tevs)
+{
+ bool need_dwarf = perf_probe_event_need_dwarf(pev);
+ int fd, ntevs;
+
+ fd = open_vmlinux();
+ if (fd < 0) {
+ if (need_dwarf) {
+ pr_warning("Failed to open debuginfo file.\n");
+ return fd;
+ }
+ pr_debug("Could not open vmlinux. Try to use symbols.\n");
+ return 0;
+ }
+
+ /* Searching trace events corresponding to probe event */
+ ntevs = find_kprobe_trace_events(fd, pev, tevs, max_tevs);
+ close(fd);
+
+ if (ntevs > 0) { /* Succeeded to find trace events */
+ pr_debug("find %d kprobe_trace_events.\n", ntevs);
+ return 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.\nn");
+ return 0;
+ }
+ }
+ return ntevs;
+}
+
+#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 = PERF_COLOR_BLUE;
+
+ if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
+ goto error;
+ if (!skip) {
+ if (show_num)
+ fprintf(stdout, "%7d %s", l, buf);
+ else
+ color_fprintf(stdout, color, " %s", buf);
+ }
+
+ while (strlen(buf) == LINEBUF_SIZE - 1 &&
+ buf[LINEBUF_SIZE - 2] != '\n') {
+ if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
+ goto error;
+ if (!skip) {
+ if (show_num)
+ fprintf(stdout, "%s", buf);
+ else
+ color_fprintf(stdout, color, "%s", buf);
+ }
+ }
+
+ return 0;
+error:
+ if (feof(fp))
+ pr_warning("Source file is shorter than expected.\n");
+ else
+ pr_warning("File read error: %s\n", strerror(errno));
+
+ return -1;
+}
+
+/*
+ * Show line-range always requires debuginfo to find source file and
+ * line number.
+ */
+int show_line_range(struct line_range *lr)
+{
+ int l = 1;
+ struct line_node *ln;
+ FILE *fp;
+ int fd, ret;
+
+ /* Search a line range */
+ ret = init_vmlinux();
+ if (ret < 0)
+ return ret;
+
+ fd = open_vmlinux();
+ if (fd < 0) {
+ pr_warning("Failed to open debuginfo file.\n");
+ return fd;
+ }
+
+ ret = find_line_range(fd, lr);
+ close(fd);
+ 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;
+ }
+
+ setup_pager();
+
+ if (lr->function)
+ fprintf(stdout, "<%s:%d>\n", lr->function,
+ lr->start - lr->offset);
+ else
+ fprintf(stdout, "<%s:%d>\n", lr->file, 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 >= 0)
+ ret = show_one_line(fp, l++, true, false);
+ if (ret < 0)
+ goto end;
+
+ list_for_each_entry(ln, &lr->line_list, list) {
+ while (ln->line > l && ret >= 0)
+ ret = show_one_line(fp, (l++) - lr->offset,
+ false, false);
+ if (ret >= 0)
+ ret = show_one_line(fp, (l++) - lr->offset,
+ false, true);
+ if (ret < 0)
+ goto end;
+ }
+
+ if (lr->end == INT_MAX)
+ lr->end = l + NR_ADDITIONAL_LINES;
+ while (l <= lr->end && !feof(fp) && ret >= 0)
+ ret = show_one_line(fp, (l++) - lr->offset, false, false);
+end:
+ fclose(fp);
+ return ret;
+}
+
+#else /* !DWARF_SUPPORT */
+
+static int convert_to_perf_probe_point(struct kprobe_trace_point *tp,
+ struct perf_probe_point *pp)
+{
+ 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_kprobe_trace_events(struct perf_probe_event *pev,
+ struct kprobe_trace_event **tevs __unused,
+ int max_tevs __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)
+{
+ pr_warning("Debuginfo-analysis is not supported.\n");
+ return -ENOSYS;
+}
+
+#endif
+
+int parse_line_range_desc(const char *arg, struct line_range *lr)
{
const char *ptr;
char *tmp;
*/
ptr = strchr(arg, ':');
if (ptr) {
- lr->start = (unsigned int)strtoul(ptr + 1, &tmp, 0);
- if (*tmp == '+')
- lr->end = lr->start + (unsigned int)strtoul(tmp + 1,
- &tmp, 0);
- else if (*tmp == '-')
- lr->end = (unsigned int)strtoul(tmp + 1, &tmp, 0);
+ lr->start = (int)strtoul(ptr + 1, &tmp, 0);
+ if (*tmp == '+') {
+ lr->end = lr->start + (int)strtoul(tmp + 1, &tmp, 0);
+ lr->end--; /*
+ * 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.
+ */
+ } else if (*tmp == '-')
+ lr->end = (int)strtoul(tmp + 1, &tmp, 0);
else
- lr->end = 0;
- pr_debug("Line range is %u to %u\n", lr->start, lr->end);
- if (lr->end && lr->start > lr->end)
+ lr->end = INT_MAX;
+ pr_debug("Line range is %d to %d\n", lr->start, lr->end);
+ if (lr->start > lr->end) {
semantic_error("Start line must be smaller"
- " than end line.");
- if (*tmp != '\0')
- semantic_error("Tailing with invalid character '%d'.",
+ " than end line.\n");
+ return -EINVAL;
+ }
+ if (*tmp != '\0') {
+ semantic_error("Tailing with invalid character '%d'.\n",
*tmp);
+ return -EINVAL;
+ }
tmp = strndup(arg, (ptr - arg));
- } else
+ } else {
tmp = strdup(arg);
+ lr->end = INT_MAX;
+ }
+
+ if (tmp == NULL)
+ return -ENOMEM;
if (strchr(tmp, '.'))
lr->file = tmp;
else
lr->function = tmp;
+
+ return 0;
}
/* Check the name is good for event/group */
}
/* Parse probepoint definition. */
-static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp)
+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;
/*
if (ptr && *ptr == '=') { /* Event name */
*ptr = '\0';
tmp = ptr + 1;
- ptr = strchr(arg, ':');
- if (ptr) /* Group name is not supported yet. */
- semantic_error("Group name is not supported yet.");
- if (!check_event_name(arg))
+ 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.", arg);
- pp->event = strdup(arg);
+ "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++ = '\0';
}
+ tmp = strdup(arg);
+ if (tmp == NULL)
+ return -ENOMEM;
+
/* Check arg is function or file and copy it */
- if (strchr(arg, '.')) /* File */
- pp->file = strdup(arg);
+ if (strchr(tmp, '.')) /* File */
+ pp->file = tmp;
else /* Function */
- pp->function = strdup(arg);
- DIE_IF(pp->file == NULL && pp->function == NULL);
+ pp->function = tmp;
/* Parse other options */
while (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, ";:+@%");
switch (c) {
case ':': /* Line number */
pp->line = strtoul(arg, &tmp, 0);
- if (*tmp != '\0')
+ if (*tmp != '\0') {
semantic_error("There is non-digit char"
- " in line number.");
+ " in line number.\n");
+ return -EINVAL;
+ }
break;
case '+': /* Byte offset from a symbol */
pp->offset = strtoul(arg, &tmp, 0);
- if (*tmp != '\0')
+ if (*tmp != '\0') {
semantic_error("There is non-digit character"
- " in offset.");
+ " in offset.\n");
+ return -EINVAL;
+ }
break;
case '@': /* File name */
- if (pp->file)
- semantic_error("SRC@SRC is not allowed.");
+ if (pp->file) {
+ semantic_error("SRC@SRC is not allowed.\n");
+ return -EINVAL;
+ }
pp->file = strdup(arg);
- DIE_IF(pp->file == NULL);
+ 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.", arg);
+ } else { /* Others not supported yet */
+ semantic_error("%%%s is not supported.\n", arg);
+ return -ENOTSUP;
+ }
break;
- default:
- DIE_IF("Program has a bug.");
+ 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)
+ if (pp->lazy_line && pp->line) {
semantic_error("Lazy pattern can't be used with line number.");
+ return -EINVAL;
+ }
- if (pp->lazy_line && pp->offset)
+ if (pp->lazy_line && pp->offset) {
semantic_error("Lazy pattern can't be used with offset.");
+ return -EINVAL;
+ }
- if (pp->line && pp->offset)
+ if (pp->line && pp->offset) {
semantic_error("Offset can't be used with line number.");
+ return -EINVAL;
+ }
- if (!pp->line && !pp->lazy_line && pp->file && !pp->function)
+ if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
semantic_error("File always requires line number or "
"lazy pattern.");
+ return -EINVAL;
+ }
- if (pp->offset && !pp->function)
+ if (pp->offset && !pp->function) {
semantic_error("Offset requires an entry function.");
+ return -EINVAL;
+ }
- if (pp->retprobe && !pp->function)
+ if (pp->retprobe && !pp->function) {
semantic_error("Return probe requires an entry function.");
+ return -EINVAL;
+ }
- if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe)
+ if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
semantic_error("Offset/Line/Lazy pattern can't be used with "
"return probe.");
+ return -EINVAL;
+ }
- pr_debug("symbol:%s file:%s line:%d offset:%d return:%d lazy:%s\n",
+ 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 definition */
-void parse_perf_probe_event(const char *str, struct probe_point *pp,
- bool *need_dwarf)
+/* Parse perf-probe event argument */
+static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
{
- char **argv;
- int argc, i;
+ char *tmp;
+ struct perf_probe_arg_field **fieldp;
+
+ pr_debug("parsing arg: %s into ", str);
- *need_dwarf = false;
+ 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;
+ }
- argv = argv_split(str, &argc);
- if (!argv)
- die("argv_split failed.");
- if (argc > MAX_PROBE_ARGS + 1)
- semantic_error("Too many arguments");
+ 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 */
+ arg->var = strndup(str, tmp - str);
+ if (arg->var == NULL)
+ return -ENOMEM;
+ pr_debug("%s, ", arg->var);
+ fieldp = &arg->field;
+
+ do {
+ *fieldp = zalloc(sizeof(struct perf_probe_arg_field));
+ if (*fieldp == NULL)
+ return -ENOMEM;
+ 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;
+ pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
+ fieldp = &(*fieldp)->next;
+ }
+ } while (tmp);
+ (*fieldp)->name = strdup(str);
+ if ((*fieldp)->name == NULL)
+ return -ENOMEM;
+ pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
+
+ /* If no name is specified, set the last field name */
+ if (!arg->name) {
+ arg->name = strdup((*fieldp)->name);
+ 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 */
- parse_perf_probe_probepoint(argv[0], pp);
- if (pp->file || pp->line || pp->lazy_line)
- *need_dwarf = true;
+ ret = parse_perf_probe_point(argv[0], pev);
+ if (ret < 0)
+ goto out;
/* Copy arguments and ensure return probe has no C argument */
- pp->nr_args = argc - 1;
- pp->args = zalloc(sizeof(char *) * pp->nr_args);
- for (i = 0; i < pp->nr_args; i++) {
- pp->args[i] = strdup(argv[i + 1]);
- if (!pp->args[i])
- die("Failed to copy argument.");
- if (is_c_varname(pp->args[i])) {
- if (pp->retprobe)
- semantic_error("You can't specify local"
- " variable for kretprobe");
- *need_dwarf = true;
+ 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 kprobe_events event into struct probe_point */
-void parse_trace_kprobe_event(const char *str, struct probe_point *pp)
+int parse_kprobe_trace_command(const char *cmd, struct kprobe_trace_event *tev)
{
+ struct kprobe_trace_point *tp = &tev->point;
char pr;
char *p;
int ret, i, argc;
char **argv;
- pr_debug("Parsing kprobe_events: %s\n", str);
- argv = argv_split(str, &argc);
- if (!argv)
- die("argv_split failed.");
- if (argc < 2)
- semantic_error("Too less arguments.");
+ pr_debug("Parsing kprobe_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 *)&pp->group,
- (float *)(void *)&pp->event);
- if (ret != 3)
- semantic_error("Failed to parse event name: %s", argv[0]);
- pr_debug("Group:%s Event:%s probe:%c\n", pp->group, pp->event, pr);
+ &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);
- pp->retprobe = (pr == 'r');
+ tp->retprobe = (pr == 'r');
/* Scan function name and offset */
- ret = sscanf(argv[1], "%a[^+]+%d", (float *)(void *)&pp->function,
- &pp->offset);
+ ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol,
+ &tp->offset);
if (ret == 1)
- pp->offset = 0;
-
- /* kprobe_events doesn't have this information */
- pp->line = 0;
- pp->file = NULL;
+ tp->offset = 0;
- pp->nr_args = argc - 2;
- pp->args = zalloc(sizeof(char *) * pp->nr_args);
- for (i = 0; i < pp->nr_args; i++) {
+ tev->nargs = argc - 2;
+ tev->args = zalloc(sizeof(struct kprobe_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';
- pp->args[i] = strdup(argv[i + 2]);
- if (!pp->args[i])
- die("Failed to copy argument.");
+ *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;
}
-/* Synthesize only probe point (not argument) */
-int synthesize_perf_probe_point(struct probe_point *pp)
+/* Compose only probe arg */
+int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len)
{
- char *buf;
- char offs[64] = "", line[64] = "";
+ struct perf_probe_arg_field *field = pa->field;
int ret;
+ char *tmp = buf;
- pp->probes[0] = buf = zalloc(MAX_CMDLEN);
- pp->found = 1;
- if (!buf)
- die("Failed to allocate memory by zalloc.");
+ 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) {
+ 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",
+ 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, 64, "+%d", pp->offset);
+ ret = e_snprintf(offs, 32, "+%lu", pp->offset);
if (ret <= 0)
goto error;
}
if (pp->line) {
- ret = e_snprintf(line, 64, ":%d", pp->line);
+ ret = e_snprintf(line, 32, ":%d", pp->line);
+ if (ret <= 0)
+ goto error;
+ }
+ if (pp->file) {
+ len = strlen(pp->file) - 31;
+ if (len < 0)
+ len = 0;
+ tmp = strchr(pp->file + len, '/');
+ if (!tmp)
+ tmp = pp->file + len;
+ ret = e_snprintf(file, 32, "@%s", tmp + 1);
if (ret <= 0)
goto error;
}
if (pp->function)
- ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s", pp->function,
- offs, pp->retprobe ? "%return" : "", line);
+ 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", pp->file, line);
- if (ret <= 0) {
+ ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line);
+ if (ret <= 0)
+ goto error;
+
+ return buf;
error:
- free(pp->probes[0]);
- pp->probes[0] = NULL;
- pp->found = 0;
- }
- return ret;
+ pr_debug("Failed to synthesize perf probe point: %s",
+ strerror(-ret));
+ if (buf)
+ free(buf);
+ return NULL;
}
-int synthesize_perf_probe_event(struct probe_point *pp)
+#if 0
+char *synthesize_perf_probe_command(struct perf_probe_event *pev)
{
char *buf;
int i, len, ret;
- len = synthesize_perf_probe_point(pp);
- if (len < 0)
- return 0;
+ buf = synthesize_perf_probe_point(&pev->point);
+ if (!buf)
+ return NULL;
- buf = pp->probes[0];
- for (i = 0; i < pp->nr_args; i++) {
+ len = strlen(buf);
+ for (i = 0; i < pev->nargs; i++) {
ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
- pp->args[i]);
- if (ret <= 0)
- goto error;
+ pev->args[i].name);
+ if (ret <= 0) {
+ free(buf);
+ return NULL;
+ }
len += ret;
}
- pp->found = 1;
- return pp->found;
-error:
- free(pp->probes[0]);
- pp->probes[0] = NULL;
+ return buf;
+}
+#endif
+
+static int __synthesize_kprobe_trace_arg_ref(struct kprobe_trace_arg_ref *ref,
+ char **buf, size_t *buflen,
+ int depth)
+{
+ int ret;
+ if (ref->next) {
+ depth = __synthesize_kprobe_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;
- return ret;
}
-int synthesize_trace_kprobe_event(struct probe_point *pp)
+static int synthesize_kprobe_trace_arg(struct kprobe_trace_arg *arg,
+ char *buf, size_t buflen)
{
+ 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;
+
+ /* Dereferencing arguments */
+ if (arg->ref) {
+ depth = __synthesize_kprobe_trace_arg_ref(arg->ref, &buf,
+ &buflen, 1);
+ if (depth < 0)
+ return depth;
+ }
+
+ /* Print argument value */
+ 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_kprobe_trace_command(struct kprobe_trace_event *tev)
+{
+ struct kprobe_trace_point *tp = &tev->point;
char *buf;
int i, len, ret;
- pp->probes[0] = buf = zalloc(MAX_CMDLEN);
- if (!buf)
- die("Failed to allocate memory by zalloc.");
- ret = e_snprintf(buf, MAX_CMDLEN, "%s+%d", pp->function, pp->offset);
- if (ret <= 0)
+ buf = zalloc(MAX_CMDLEN);
+ if (buf == NULL)
+ return NULL;
+
+ len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu",
+ tp->retprobe ? 'r' : 'p',
+ tev->group, tev->event,
+ tp->symbol, tp->offset);
+ if (len <= 0)
goto error;
- len = ret;
- for (i = 0; i < pp->nr_args; i++) {
- ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
- pp->args[i]);
+ for (i = 0; i < tev->nargs; i++) {
+ ret = synthesize_kprobe_trace_arg(&tev->args[i], buf + len,
+ MAX_CMDLEN - len);
if (ret <= 0)
goto error;
len += ret;
}
- pp->found = 1;
- return pp->found;
+ return buf;
error:
- free(pp->probes[0]);
- pp->probes[0] = NULL;
+ free(buf);
+ return NULL;
+}
+
+int convert_to_perf_probe_event(struct kprobe_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 = convert_to_perf_probe_point(&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_kprobe_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;
}
-static int open_kprobe_events(int flags, int mode)
+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));
+}
+
+void clear_kprobe_trace_event(struct kprobe_trace_event *tev)
+{
+ struct kprobe_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);
+ 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;
- ret = e_snprintf(buf, PATH_MAX, "%s/../kprobe_events", debugfs_path);
- if (ret < 0)
- die("Failed to make kprobe_events path.");
+ __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);
+ }
- ret = open(buf, flags, mode);
if (ret < 0) {
if (errno == ENOENT)
- die("kprobe_events file does not exist -"
- " please rebuild with CONFIG_KPROBE_EVENT.");
+ pr_warning("kprobe_events file does not exist - please"
+ " rebuild kernel with CONFIG_KPROBE_EVENT.\n");
else
- die("Could not open kprobe_events file: %s",
- strerror(errno));
+ 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_trace_kprobe_event_rawlist(int fd)
+static struct strlist *get_kprobe_trace_command_rawlist(int fd)
{
int ret, idx;
FILE *fp;
if (p[idx] == '\n')
p[idx] = '\0';
ret = strlist__add(sl, buf);
- if (ret < 0)
- die("strlist__add failed: %s", strerror(-ret));
+ if (ret < 0) {
+ pr_debug("strlist__add failed: %s\n", strerror(-ret));
+ strlist__delete(sl);
+ return NULL;
+ }
}
fclose(fp);
return sl;
}
-/* Free and zero clear probe_point */
-static void clear_probe_point(struct probe_point *pp)
-{
- int i;
-
- if (pp->event)
- free(pp->event);
- if (pp->group)
- free(pp->group);
- if (pp->function)
- free(pp->function);
- if (pp->file)
- free(pp->file);
- if (pp->lazy_line)
- free(pp->lazy_line);
- for (i = 0; i < pp->nr_args; i++)
- free(pp->args[i]);
- if (pp->args)
- free(pp->args);
- for (i = 0; i < pp->found; i++)
- free(pp->probes[i]);
- memset(pp, 0, sizeof(*pp));
-}
-
/* Show an event */
-static void show_perf_probe_event(const char *event, const char *place,
- struct probe_point *pp)
+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", pp->group, event);
+ ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event);
if (ret < 0)
- die("Failed to copy event: %s", strerror(-ret));
- printf(" %-40s (on %s", buf, place);
+ return ret;
+
+ printf(" %-20s (on %s", buf, place);
- if (pp->nr_args > 0) {
+ if (pev->nargs > 0) {
printf(" with");
- for (i = 0; i < pp->nr_args; i++)
- printf(" %s", pp->args[i]);
+ 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 */
-void show_perf_probe_events(void)
+int show_perf_probe_events(void)
{
- int fd;
- struct probe_point pp;
+ int fd, ret;
+ struct kprobe_trace_event tev;
+ struct perf_probe_event pev;
struct strlist *rawlist;
struct str_node *ent;
setup_pager();
- memset(&pp, 0, sizeof(pp));
+ ret = init_vmlinux();
+ if (ret < 0)
+ return ret;
+
+ memset(&tev, 0, sizeof(tev));
+ memset(&pev, 0, sizeof(pev));
- fd = open_kprobe_events(O_RDONLY, 0);
- rawlist = get_trace_kprobe_event_rawlist(fd);
+ fd = open_kprobe_events(false);
+ if (fd < 0)
+ return fd;
+
+ rawlist = get_kprobe_trace_command_rawlist(fd);
close(fd);
+ if (!rawlist)
+ return -ENOENT;
strlist__for_each(ent, rawlist) {
- parse_trace_kprobe_event(ent->s, &pp);
- /* Synthesize only event probe point */
- synthesize_perf_probe_point(&pp);
- /* Show an event */
- show_perf_probe_event(pp.event, pp.probes[0], &pp);
- clear_probe_point(&pp);
+ ret = parse_kprobe_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_kprobe_trace_event(&tev);
+ if (ret < 0)
+ break;
}
-
strlist__delete(rawlist);
+
+ return ret;
}
/* Get current perf-probe event names */
-static struct strlist *get_perf_event_names(int fd, bool include_group)
+static struct strlist *get_kprobe_trace_event_names(int fd, bool include_group)
{
char buf[128];
struct strlist *sl, *rawlist;
struct str_node *ent;
- struct probe_point pp;
+ struct kprobe_trace_event tev;
+ int ret = 0;
- memset(&pp, 0, sizeof(pp));
- rawlist = get_trace_kprobe_event_rawlist(fd);
+ memset(&tev, 0, sizeof(tev));
+ rawlist = get_kprobe_trace_command_rawlist(fd);
sl = strlist__new(true, NULL);
strlist__for_each(ent, rawlist) {
- parse_trace_kprobe_event(ent->s, &pp);
+ ret = parse_kprobe_trace_command(ent->s, &tev);
+ if (ret < 0)
+ break;
if (include_group) {
- if (e_snprintf(buf, 128, "%s:%s", pp.group,
- pp.event) < 0)
- die("Failed to copy group:event name.");
- strlist__add(sl, buf);
+ ret = e_snprintf(buf, 128, "%s:%s", tev.group,
+ tev.event);
+ if (ret >= 0)
+ ret = strlist__add(sl, buf);
} else
- strlist__add(sl, pp.event);
- clear_probe_point(&pp);
+ ret = strlist__add(sl, tev.event);
+ clear_kprobe_trace_event(&tev);
+ if (ret < 0)
+ break;
}
-
strlist__delete(rawlist);
+ if (ret < 0) {
+ strlist__delete(sl);
+ return NULL;
+ }
return sl;
}
-static void write_trace_kprobe_event(int fd, const char *buf)
+static int write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev)
{
- int ret;
+ int ret = 0;
+ char *buf = synthesize_kprobe_trace_command(tev);
+
+ if (!buf) {
+ pr_debug("Failed to synthesize kprobe trace event.\n");
+ return -EINVAL;
+ }
pr_debug("Writing event: %s\n", buf);
- ret = write(fd, buf, strlen(buf));
- if (ret <= 0)
- die("Failed to write event: %s", strerror(errno));
+ 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 void get_new_event_name(char *buf, size_t len, const char *base,
- struct strlist *namelist, bool allow_suffix)
+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)
- die("snprintf() failed: %s", strerror(-ret));
+ if (ret < 0) {
+ pr_debug("snprintf() failed: %s\n", strerror(-ret));
+ return ret;
+ }
if (!strlist__has_entry(namelist, buf))
- return;
+ return 0;
if (!allow_suffix) {
pr_warning("Error: event \"%s\" already exists. "
"(Use -f to force duplicates.)\n", base);
- die("Can't add new event.");
+ 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)
- die("snprintf() failed: %s", strerror(-ret));
+ 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)
- die("Too many events are on the same function.");
+ if (i == MAX_EVENT_INDEX) {
+ pr_warning("Too many events are on the same function.\n");
+ ret = -ERANGE;
+ }
+
+ return ret;
}
-void add_trace_kprobe_events(struct probe_point *probes, int nr_probes,
- bool force_add)
+static int __add_kprobe_trace_events(struct perf_probe_event *pev,
+ struct kprobe_trace_event *tevs,
+ int ntevs, bool allow_suffix)
{
- int i, j, fd;
- struct probe_point *pp;
- char buf[MAX_CMDLEN];
- char event[64];
+ int i, fd, ret;
+ struct kprobe_trace_event *tev = NULL;
+ char buf[64];
+ const char *event, *group;
struct strlist *namelist;
- bool allow_suffix;
- fd = open_kprobe_events(O_RDWR, O_APPEND);
+ fd = open_kprobe_events(true);
+ if (fd < 0)
+ return fd;
/* Get current event names */
- namelist = get_perf_event_names(fd, false);
-
- for (j = 0; j < nr_probes; j++) {
- pp = probes + j;
- if (!pp->event)
- pp->event = strdup(pp->function);
- if (!pp->group)
- pp->group = strdup(PERFPROBE_GROUP);
- DIE_IF(!pp->event || !pp->group);
- /* If force_add is true, suffix search is allowed */
- allow_suffix = force_add;
- for (i = 0; i < pp->found; i++) {
- /* Get an unused new event name */
- get_new_event_name(event, 64, pp->event, namelist,
- allow_suffix);
- snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s\n",
- pp->retprobe ? 'r' : 'p',
- pp->group, event,
- pp->probes[i]);
- write_trace_kprobe_event(fd, buf);
- printf("Added new event:\n");
- /* Get the first parameter (probe-point) */
- sscanf(pp->probes[i], "%s", buf);
- show_perf_probe_event(event, buf, pp);
- /* Add added event name to namelist */
- strlist__add(namelist, event);
- /*
- * 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;
+ namelist = get_kprobe_trace_event_names(fd, false);
+ if (!namelist) {
+ pr_debug("Failed to get current event list.\n");
+ return -EIO;
+ }
+
+ ret = 0;
+ printf("Add 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_kprobe_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 on all perf tools, such as:\n\n");
+ printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group,
+ tev->event);
}
- /* Show how to use the event. */
- printf("\nYou can now use it on all perf tools, such as:\n\n");
- printf("\tperf record -e %s:%s -a sleep 1\n\n", PERFPROBE_GROUP, event);
strlist__delete(namelist);
close(fd);
+ return ret;
+}
+
+static int convert_to_kprobe_trace_events(struct perf_probe_event *pev,
+ struct kprobe_trace_event **tevs,
+ int max_tevs)
+{
+ struct symbol *sym;
+ int ret = 0, i;
+ struct kprobe_trace_event *tev;
+
+ /* Convert perf_probe_event with debuginfo */
+ ret = try_to_find_kprobe_trace_events(pev, tevs, max_tevs);
+ if (ret != 0)
+ return ret;
+
+ /* Allocate trace event buffer */
+ tev = *tevs = zalloc(sizeof(struct kprobe_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;
+ }
+ tev->point.offset = pev->point.offset;
+ tev->nargs = pev->nargs;
+ if (tev->nargs) {
+ tev->args = zalloc(sizeof(struct kprobe_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 = map__find_symbol_by_name(machine.vmlinux_maps[MAP__FUNCTION],
+ tev->point.symbol, NULL);
+ if (!sym) {
+ pr_warning("Kernel symbol \'%s\' not found.\n",
+ tev->point.symbol);
+ ret = -ENOENT;
+ goto error;
+ }
+
+ return 1;
+error:
+ clear_kprobe_trace_event(tev);
+ free(tev);
+ *tevs = NULL;
+ return ret;
+}
+
+struct __event_package {
+ struct perf_probe_event *pev;
+ struct kprobe_trace_event *tevs;
+ int ntevs;
+};
+
+int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
+ bool force_add, int max_tevs)
+{
+ 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)
+ 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_kprobe_trace_events(pkgs[i].pev,
+ &pkgs[i].tevs, max_tevs);
+ if (ret < 0)
+ goto end;
+ pkgs[i].ntevs = ret;
+ }
+
+ /* Loop 2: add all events */
+ for (i = 0; i < npevs && ret >= 0; i++)
+ ret = __add_kprobe_trace_events(pkgs[i].pev, pkgs[i].tevs,
+ pkgs[i].ntevs, force_add);
+end:
+ /* Loop 3: cleanup trace events */
+ for (i = 0; i < npevs; i++)
+ for (j = 0; j < pkgs[i].ntevs; j++)
+ clear_kprobe_trace_event(&pkgs[i].tevs[j]);
+
+ return ret;
}
-static void __del_trace_kprobe_event(int fd, struct str_node *ent)
+static int __del_trace_kprobe_event(int fd, struct str_node *ent)
{
char *p;
char buf[128];
+ int ret;
/* Convert from perf-probe event to trace-kprobe event */
- if (e_snprintf(buf, 128, "-:%s", ent->s) < 0)
- die("Failed to copy event.");
+ ret = e_snprintf(buf, 128, "-:%s", ent->s);
+ if (ret < 0)
+ goto error;
+
p = strchr(buf + 2, ':');
- if (!p)
- die("Internal error: %s should have ':' but not.", ent->s);
+ if (!p) {
+ pr_debug("Internal error: %s should have ':' but not.\n",
+ ent->s);
+ ret = -ENOTSUP;
+ goto error;
+ }
*p = '/';
- write_trace_kprobe_event(fd, buf);
+ pr_debug("Writing event: %s\n", buf);
+ ret = write(fd, buf, strlen(buf));
+ if (ret < 0)
+ goto error;
+
printf("Remove event: %s\n", ent->s);
+ return 0;
+error:
+ pr_warning("Failed to delete event: %s\n", strerror(-ret));
+ return ret;
}
-static void del_trace_kprobe_event(int fd, const char *group,
- const char *event, struct strlist *namelist)
+static int del_trace_kprobe_event(int fd, const char *group,
+ const char *event, struct strlist *namelist)
{
char buf[128];
struct str_node *ent, *n;
- int found = 0;
+ int found = 0, ret = 0;
- if (e_snprintf(buf, 128, "%s:%s", group, event) < 0)
- die("Failed to copy event.");
+ ret = e_snprintf(buf, 128, "%s:%s", group, event);
+ if (ret < 0) {
+ pr_err("Failed to copy event.");
+ return ret;
+ }
if (strpbrk(buf, "*?")) { /* Glob-exp */
strlist__for_each_safe(ent, n, namelist)
if (strglobmatch(ent->s, buf)) {
found++;
- __del_trace_kprobe_event(fd, ent);
+ ret = __del_trace_kprobe_event(fd, ent);
+ if (ret < 0)
+ break;
strlist__remove(namelist, ent);
}
} else {
ent = strlist__find(namelist, buf);
if (ent) {
found++;
- __del_trace_kprobe_event(fd, ent);
- strlist__remove(namelist, ent);
+ ret = __del_trace_kprobe_event(fd, ent);
+ if (ret >= 0)
+ strlist__remove(namelist, ent);
}
}
- if (found == 0)
- pr_info("Info: event \"%s\" does not exist, could not remove it.\n", buf);
+ if (found == 0 && ret >= 0)
+ pr_info("Info: Event \"%s\" does not exist.\n", buf);
+
+ return ret;
}
-void del_trace_kprobe_events(struct strlist *dellist)
+int del_perf_probe_events(struct strlist *dellist)
{
- int fd;
+ int fd, ret = 0;
const char *group, *event;
char *p, *str;
struct str_node *ent;
struct strlist *namelist;
- fd = open_kprobe_events(O_RDWR, O_APPEND);
+ fd = open_kprobe_events(true);
+ if (fd < 0)
+ return fd;
+
/* Get current event names */
- namelist = get_perf_event_names(fd, true);
+ namelist = get_kprobe_trace_event_names(fd, true);
+ if (namelist == NULL)
+ return -EINVAL;
strlist__for_each(ent, dellist) {
str = strdup(ent->s);
- if (!str)
- die("Failed to copy event.");
+ if (str == NULL) {
+ ret = -ENOMEM;
+ break;
+ }
pr_debug("Parsing: %s\n", str);
p = strchr(str, ':');
if (p) {
event = str;
}
pr_debug("Group: %s, Event: %s\n", group, event);
- del_trace_kprobe_event(fd, group, event, namelist);
+ ret = del_trace_kprobe_event(fd, group, event, namelist);
free(str);
+ if (ret < 0)
+ break;
}
strlist__delete(namelist);
close(fd);
-}
-#define LINEBUF_SIZE 256
-#define NR_ADDITIONAL_LINES 2
-
-static void show_one_line(FILE *fp, unsigned int l, bool skip, bool show_num)
-{
- char buf[LINEBUF_SIZE];
- const char *color = PERF_COLOR_BLUE;
-
- if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
- goto error;
- if (!skip) {
- if (show_num)
- fprintf(stdout, "%7u %s", l, buf);
- else
- color_fprintf(stdout, color, " %s", buf);
- }
-
- while (strlen(buf) == LINEBUF_SIZE - 1 &&
- buf[LINEBUF_SIZE - 2] != '\n') {
- if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
- goto error;
- if (!skip) {
- if (show_num)
- fprintf(stdout, "%s", buf);
- else
- color_fprintf(stdout, color, "%s", buf);
- }
- }
- return;
-error:
- if (feof(fp))
- die("Source file is shorter than expected.");
- else
- die("File read error: %s", strerror(errno));
+ return ret;
}
-void show_line_range(struct line_range *lr)
-{
- unsigned int l = 1;
- struct line_node *ln;
- FILE *fp;
-
- setup_pager();
-
- if (lr->function)
- fprintf(stdout, "<%s:%d>\n", lr->function,
- lr->start - lr->offset);
- else
- fprintf(stdout, "<%s:%d>\n", lr->file, lr->start);
-
- fp = fopen(lr->path, "r");
- if (fp == NULL)
- die("Failed to open %s: %s", lr->path, strerror(errno));
- /* Skip to starting line number */
- while (l < lr->start)
- show_one_line(fp, l++, true, false);
-
- list_for_each_entry(ln, &lr->line_list, list) {
- while (ln->line > l)
- show_one_line(fp, (l++) - lr->offset, false, false);
- show_one_line(fp, (l++) - lr->offset, false, true);
- }
-
- if (lr->end == INT_MAX)
- lr->end = l + NR_ADDITIONAL_LINES;
- while (l < lr->end && !feof(fp))
- show_one_line(fp, (l++) - lr->offset, false, false);
-
- fclose(fp);
-}
git.openpandora.org / pandora-kernel.git / blobdiff