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-rw-r--r--trace2/tr2_tgt_event.c696
1 files changed, 696 insertions, 0 deletions
diff --git a/trace2/tr2_tgt_event.c b/trace2/tr2_tgt_event.c
new file mode 100644
index 0000000..16f6332
--- /dev/null
+++ b/trace2/tr2_tgt_event.c
@@ -0,0 +1,696 @@
+#include "cache.h"
+#include "config.h"
+#include "json-writer.h"
+#include "run-command.h"
+#include "version.h"
+#include "trace2/tr2_dst.h"
+#include "trace2/tr2_tbuf.h"
+#include "trace2/tr2_sid.h"
+#include "trace2/tr2_sysenv.h"
+#include "trace2/tr2_tgt.h"
+#include "trace2/tr2_tls.h"
+#include "trace2/tr2_tmr.h"
+
+static struct tr2_dst tr2dst_event = {
+ .sysenv_var = TR2_SYSENV_EVENT,
+};
+
+/*
+ * The version number of the JSON data generated by the EVENT target in this
+ * source file. The version should be incremented if new event types are added,
+ * if existing fields are removed, or if there are significant changes in
+ * interpretation of existing events or fields. Smaller changes, such as adding
+ * a new field to an existing event, do not require an increment to the EVENT
+ * format version.
+ */
+#define TR2_EVENT_VERSION "3"
+
+/*
+ * Region nesting limit for messages written to the event target.
+ *
+ * The "region_enter" and "region_leave" messages (especially recursive
+ * messages such as those produced while diving the worktree or index)
+ * are primarily intended for the performance target during debugging.
+ *
+ * Some of the outer-most messages, however, may be of interest to the
+ * event target. Use the TR2_SYSENV_EVENT_NESTING setting to increase
+ * region details in the event target.
+ */
+static int tr2env_event_max_nesting_levels = 2;
+
+/*
+ * Use the TR2_SYSENV_EVENT_BRIEF to omit the <time>, <file>, and
+ * <line> fields from most events.
+ */
+static int tr2env_event_be_brief;
+
+static int fn_init(void)
+{
+ int want = tr2_dst_trace_want(&tr2dst_event);
+ int max_nesting;
+ int want_brief;
+ const char *nesting;
+ const char *brief;
+
+ if (!want)
+ return want;
+
+ nesting = tr2_sysenv_get(TR2_SYSENV_EVENT_NESTING);
+ if (nesting && *nesting && ((max_nesting = atoi(nesting)) > 0))
+ tr2env_event_max_nesting_levels = max_nesting;
+
+ brief = tr2_sysenv_get(TR2_SYSENV_EVENT_BRIEF);
+ if (brief && *brief &&
+ ((want_brief = git_parse_maybe_bool(brief)) != -1))
+ tr2env_event_be_brief = want_brief;
+
+ return want;
+}
+
+static void fn_term(void)
+{
+ tr2_dst_trace_disable(&tr2dst_event);
+}
+
+/*
+ * Append common key-value pairs to the currently open JSON object.
+ * "event:"<event_name>"
+ * "sid":"<sid>"
+ * "thread":"<thread_name>"
+ * "time":"<time>"
+ * "file":"<filename>"
+ * "line":<line_number>
+ * "repo":<repo_id>
+ */
+static void event_fmt_prepare(const char *event_name, const char *file,
+ int line, const struct repository *repo,
+ struct json_writer *jw)
+{
+ struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
+ struct tr2_tbuf tb_now;
+
+ jw_object_string(jw, "event", event_name);
+ jw_object_string(jw, "sid", tr2_sid_get());
+ jw_object_string(jw, "thread", ctx->thread_name);
+
+ /*
+ * In brief mode, only emit <time> on these 2 event types.
+ */
+ if (!tr2env_event_be_brief || !strcmp(event_name, "version") ||
+ !strcmp(event_name, "atexit")) {
+ tr2_tbuf_utc_datetime_extended(&tb_now);
+ jw_object_string(jw, "time", tb_now.buf);
+ }
+
+ if (!tr2env_event_be_brief && file && *file) {
+ jw_object_string(jw, "file", file);
+ jw_object_intmax(jw, "line", line);
+ }
+
+ if (repo)
+ jw_object_intmax(jw, "repo", repo->trace2_repo_id);
+}
+
+static void fn_too_many_files_fl(const char *file, int line)
+{
+ const char *event_name = "too_many_files";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_version_fl(const char *file, int line)
+{
+ const char *event_name = "version";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_string(&jw, "evt", TR2_EVENT_VERSION);
+ jw_object_string(&jw, "exe", git_version_string);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+
+ if (tr2dst_event.too_many_files)
+ fn_too_many_files_fl(file, line);
+}
+
+static void fn_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, const char **argv)
+{
+ const char *event_name = "start";
+ struct json_writer jw = JSON_WRITER_INIT;
+ double t_abs = (double)us_elapsed_absolute / 1000000.0;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_double(&jw, "t_abs", 6, t_abs);
+ jw_object_inline_begin_array(&jw, "argv");
+ jw_array_argv(&jw, argv);
+ jw_end(&jw);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_exit_fl(const char *file, int line, uint64_t us_elapsed_absolute,
+ int code)
+{
+ const char *event_name = "exit";
+ struct json_writer jw = JSON_WRITER_INIT;
+ double t_abs = (double)us_elapsed_absolute / 1000000.0;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_double(&jw, "t_abs", 6, t_abs);
+ jw_object_intmax(&jw, "code", code);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_signal(uint64_t us_elapsed_absolute, int signo)
+{
+ const char *event_name = "signal";
+ struct json_writer jw = JSON_WRITER_INIT;
+ double t_abs = (double)us_elapsed_absolute / 1000000.0;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, __FILE__, __LINE__, NULL, &jw);
+ jw_object_double(&jw, "t_abs", 6, t_abs);
+ jw_object_intmax(&jw, "signo", signo);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_atexit(uint64_t us_elapsed_absolute, int code)
+{
+ const char *event_name = "atexit";
+ struct json_writer jw = JSON_WRITER_INIT;
+ double t_abs = (double)us_elapsed_absolute / 1000000.0;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, __FILE__, __LINE__, NULL, &jw);
+ jw_object_double(&jw, "t_abs", 6, t_abs);
+ jw_object_intmax(&jw, "code", code);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void maybe_add_string_va(struct json_writer *jw, const char *field_name,
+ const char *fmt, va_list ap)
+{
+ if (fmt && *fmt) {
+ va_list copy_ap;
+ struct strbuf buf = STRBUF_INIT;
+
+ va_copy(copy_ap, ap);
+ strbuf_vaddf(&buf, fmt, copy_ap);
+ va_end(copy_ap);
+
+ jw_object_string(jw, field_name, buf.buf);
+ strbuf_release(&buf);
+ return;
+ }
+}
+
+static void fn_error_va_fl(const char *file, int line, const char *fmt,
+ va_list ap)
+{
+ const char *event_name = "error";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ maybe_add_string_va(&jw, "msg", fmt, ap);
+ /*
+ * Also emit the format string as a field in case
+ * post-processors want to aggregate common error
+ * messages by type without argument fields (such
+ * as pathnames or branch names) cluttering it up.
+ */
+ if (fmt && *fmt)
+ jw_object_string(&jw, "fmt", fmt);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_command_path_fl(const char *file, int line, const char *pathname)
+{
+ const char *event_name = "cmd_path";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_string(&jw, "path", pathname);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_command_ancestry_fl(const char *file, int line, const char **parent_names)
+{
+ const char *event_name = "cmd_ancestry";
+ const char *parent_name = NULL;
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_inline_begin_array(&jw, "ancestry");
+
+ while ((parent_name = *parent_names++))
+ jw_array_string(&jw, parent_name);
+
+ jw_end(&jw); /* 'ancestry' array */
+ jw_end(&jw); /* event object */
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_command_name_fl(const char *file, int line, const char *name,
+ const char *hierarchy)
+{
+ const char *event_name = "cmd_name";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_string(&jw, "name", name);
+ if (hierarchy && *hierarchy)
+ jw_object_string(&jw, "hierarchy", hierarchy);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_command_mode_fl(const char *file, int line, const char *mode)
+{
+ const char *event_name = "cmd_mode";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_string(&jw, "name", mode);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_alias_fl(const char *file, int line, const char *alias,
+ const char **argv)
+{
+ const char *event_name = "alias";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_string(&jw, "alias", alias);
+ jw_object_inline_begin_array(&jw, "argv");
+ jw_array_argv(&jw, argv);
+ jw_end(&jw);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_child_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute,
+ const struct child_process *cmd)
+{
+ const char *event_name = "child_start";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_intmax(&jw, "child_id", cmd->trace2_child_id);
+ if (cmd->trace2_hook_name) {
+ jw_object_string(&jw, "child_class", "hook");
+ jw_object_string(&jw, "hook_name", cmd->trace2_hook_name);
+ } else {
+ const char *child_class =
+ cmd->trace2_child_class ? cmd->trace2_child_class : "?";
+ jw_object_string(&jw, "child_class", child_class);
+ }
+ if (cmd->dir)
+ jw_object_string(&jw, "cd", cmd->dir);
+ jw_object_bool(&jw, "use_shell", cmd->use_shell);
+ jw_object_inline_begin_array(&jw, "argv");
+ if (cmd->git_cmd)
+ jw_array_string(&jw, "git");
+ jw_array_argv(&jw, cmd->args.v);
+ jw_end(&jw);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_child_exit_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, int cid, int pid,
+ int code, uint64_t us_elapsed_child)
+{
+ const char *event_name = "child_exit";
+ struct json_writer jw = JSON_WRITER_INIT;
+ double t_rel = (double)us_elapsed_child / 1000000.0;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_intmax(&jw, "child_id", cid);
+ jw_object_intmax(&jw, "pid", pid);
+ jw_object_intmax(&jw, "code", code);
+ jw_object_double(&jw, "t_rel", 6, t_rel);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+
+ jw_release(&jw);
+}
+
+static void fn_child_ready_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, int cid, int pid,
+ const char *ready, uint64_t us_elapsed_child)
+{
+ const char *event_name = "child_ready";
+ struct json_writer jw = JSON_WRITER_INIT;
+ double t_rel = (double)us_elapsed_child / 1000000.0;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_intmax(&jw, "child_id", cid);
+ jw_object_intmax(&jw, "pid", pid);
+ jw_object_string(&jw, "ready", ready);
+ jw_object_double(&jw, "t_rel", 6, t_rel);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+
+ jw_release(&jw);
+}
+
+static void fn_thread_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute)
+{
+ const char *event_name = "thread_start";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_thread_exit_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute,
+ uint64_t us_elapsed_thread)
+{
+ const char *event_name = "thread_exit";
+ struct json_writer jw = JSON_WRITER_INIT;
+ double t_rel = (double)us_elapsed_thread / 1000000.0;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_double(&jw, "t_rel", 6, t_rel);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_exec_fl(const char *file, int line, uint64_t us_elapsed_absolute,
+ int exec_id, const char *exe, const char **argv)
+{
+ const char *event_name = "exec";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_intmax(&jw, "exec_id", exec_id);
+ if (exe)
+ jw_object_string(&jw, "exe", exe);
+ jw_object_inline_begin_array(&jw, "argv");
+ jw_array_argv(&jw, argv);
+ jw_end(&jw);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_exec_result_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, int exec_id,
+ int code)
+{
+ const char *event_name = "exec_result";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_intmax(&jw, "exec_id", exec_id);
+ jw_object_intmax(&jw, "code", code);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_param_fl(const char *file, int line, const char *param,
+ const char *value)
+{
+ const char *event_name = "def_param";
+ struct json_writer jw = JSON_WRITER_INIT;
+ enum config_scope scope = current_config_scope();
+ const char *scope_name = config_scope_name(scope);
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_string(&jw, "scope", scope_name);
+ jw_object_string(&jw, "param", param);
+ jw_object_string(&jw, "value", value);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_repo_fl(const char *file, int line,
+ const struct repository *repo)
+{
+ const char *event_name = "def_repo";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, repo, &jw);
+ jw_object_string(&jw, "worktree", repo->worktree);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_region_enter_printf_va_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute,
+ const char *category,
+ const char *label,
+ const struct repository *repo,
+ const char *fmt, va_list ap)
+{
+ const char *event_name = "region_enter";
+ struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, repo, &jw);
+ jw_object_intmax(&jw, "nesting", ctx->nr_open_regions);
+ if (category)
+ jw_object_string(&jw, "category", category);
+ if (label)
+ jw_object_string(&jw, "label", label);
+ maybe_add_string_va(&jw, "msg", fmt, ap);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+ }
+}
+
+static void fn_region_leave_printf_va_fl(
+ const char *file, int line, uint64_t us_elapsed_absolute,
+ uint64_t us_elapsed_region, const char *category, const char *label,
+ const struct repository *repo, const char *fmt, va_list ap)
+{
+ const char *event_name = "region_leave";
+ struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
+ struct json_writer jw = JSON_WRITER_INIT;
+ double t_rel = (double)us_elapsed_region / 1000000.0;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, repo, &jw);
+ jw_object_double(&jw, "t_rel", 6, t_rel);
+ jw_object_intmax(&jw, "nesting", ctx->nr_open_regions);
+ if (category)
+ jw_object_string(&jw, "category", category);
+ if (label)
+ jw_object_string(&jw, "label", label);
+ maybe_add_string_va(&jw, "msg", fmt, ap);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+ }
+}
+
+static void fn_data_fl(const char *file, int line, uint64_t us_elapsed_absolute,
+ uint64_t us_elapsed_region, const char *category,
+ const struct repository *repo, const char *key,
+ const char *value)
+{
+ const char *event_name = "data";
+ struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
+ struct json_writer jw = JSON_WRITER_INIT;
+ double t_abs = (double)us_elapsed_absolute / 1000000.0;
+ double t_rel = (double)us_elapsed_region / 1000000.0;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, repo, &jw);
+ jw_object_double(&jw, "t_abs", 6, t_abs);
+ jw_object_double(&jw, "t_rel", 6, t_rel);
+ jw_object_intmax(&jw, "nesting", ctx->nr_open_regions);
+ jw_object_string(&jw, "category", category);
+ jw_object_string(&jw, "key", key);
+ jw_object_string(&jw, "value", value);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+ }
+}
+
+static void fn_data_json_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute,
+ uint64_t us_elapsed_region, const char *category,
+ const struct repository *repo, const char *key,
+ const struct json_writer *value)
+{
+ const char *event_name = "data_json";
+ struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
+ struct json_writer jw = JSON_WRITER_INIT;
+ double t_abs = (double)us_elapsed_absolute / 1000000.0;
+ double t_rel = (double)us_elapsed_region / 1000000.0;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, file, line, repo, &jw);
+ jw_object_double(&jw, "t_abs", 6, t_abs);
+ jw_object_double(&jw, "t_rel", 6, t_rel);
+ jw_object_intmax(&jw, "nesting", ctx->nr_open_regions);
+ jw_object_string(&jw, "category", category);
+ jw_object_string(&jw, "key", key);
+ jw_object_sub_jw(&jw, "value", value);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+ }
+}
+
+static void fn_timer(const struct tr2_timer_metadata *meta,
+ const struct tr2_timer *timer,
+ int is_final_data)
+{
+ const char *event_name = is_final_data ? "timer" : "th_timer";
+ struct json_writer jw = JSON_WRITER_INIT;
+ double t_total = NS_TO_SEC(timer->total_ns);
+ double t_min = NS_TO_SEC(timer->min_ns);
+ double t_max = NS_TO_SEC(timer->max_ns);
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, __FILE__, __LINE__, NULL, &jw);
+ jw_object_string(&jw, "category", meta->category);
+ jw_object_string(&jw, "name", meta->name);
+ jw_object_intmax(&jw, "intervals", timer->interval_count);
+ jw_object_double(&jw, "t_total", 6, t_total);
+ jw_object_double(&jw, "t_min", 6, t_min);
+ jw_object_double(&jw, "t_max", 6, t_max);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+static void fn_counter(const struct tr2_counter_metadata *meta,
+ const struct tr2_counter *counter,
+ int is_final_data)
+{
+ const char *event_name = is_final_data ? "counter" : "th_counter";
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+ event_fmt_prepare(event_name, __FILE__, __LINE__, NULL, &jw);
+ jw_object_string(&jw, "category", meta->category);
+ jw_object_string(&jw, "name", meta->name);
+ jw_object_intmax(&jw, "count", counter->value);
+ jw_end(&jw);
+
+ tr2_dst_write_line(&tr2dst_event, &jw.json);
+ jw_release(&jw);
+}
+
+struct tr2_tgt tr2_tgt_event = {
+ .pdst = &tr2dst_event,
+
+ .pfn_init = fn_init,
+ .pfn_term = fn_term,
+
+ .pfn_version_fl = fn_version_fl,
+ .pfn_start_fl = fn_start_fl,
+ .pfn_exit_fl = fn_exit_fl,
+ .pfn_signal = fn_signal,
+ .pfn_atexit = fn_atexit,
+ .pfn_error_va_fl = fn_error_va_fl,
+ .pfn_command_path_fl = fn_command_path_fl,
+ .pfn_command_ancestry_fl = fn_command_ancestry_fl,
+ .pfn_command_name_fl = fn_command_name_fl,
+ .pfn_command_mode_fl = fn_command_mode_fl,
+ .pfn_alias_fl = fn_alias_fl,
+ .pfn_child_start_fl = fn_child_start_fl,
+ .pfn_child_exit_fl = fn_child_exit_fl,
+ .pfn_child_ready_fl = fn_child_ready_fl,
+ .pfn_thread_start_fl = fn_thread_start_fl,
+ .pfn_thread_exit_fl = fn_thread_exit_fl,
+ .pfn_exec_fl = fn_exec_fl,
+ .pfn_exec_result_fl = fn_exec_result_fl,
+ .pfn_param_fl = fn_param_fl,
+ .pfn_repo_fl = fn_repo_fl,
+ .pfn_region_enter_printf_va_fl = fn_region_enter_printf_va_fl,
+ .pfn_region_leave_printf_va_fl = fn_region_leave_printf_va_fl,
+ .pfn_data_fl = fn_data_fl,
+ .pfn_data_json_fl = fn_data_json_fl,
+ .pfn_printf_va_fl = NULL,
+ .pfn_timer = fn_timer,
+ .pfn_counter = fn_counter,
+};