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![Josh Steadmon](/assets/img/avatar_default.png)
Add a public wrapper, trace2_session_id(), around tr2_sid_get(), which is intended to be private trace2 implementation. Signed-off-by: Josh Steadmon <steadmon@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
800 lines
18 KiB
C
800 lines
18 KiB
C
#include "cache.h"
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#include "config.h"
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#include "json-writer.h"
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#include "quote.h"
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#include "run-command.h"
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#include "sigchain.h"
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#include "thread-utils.h"
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#include "version.h"
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#include "trace2/tr2_cfg.h"
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#include "trace2/tr2_cmd_name.h"
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#include "trace2/tr2_dst.h"
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#include "trace2/tr2_sid.h"
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#include "trace2/tr2_sysenv.h"
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#include "trace2/tr2_tgt.h"
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#include "trace2/tr2_tls.h"
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static int trace2_enabled;
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static int tr2_next_child_id; /* modify under lock */
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static int tr2_next_exec_id; /* modify under lock */
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static int tr2_next_repo_id = 1; /* modify under lock. zero is reserved */
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/*
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* A table of the builtin TRACE2 targets. Each of these may be independently
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* enabled or disabled. Each TRACE2 API method will try to write an event to
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* *each* of the enabled targets.
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*/
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/* clang-format off */
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static struct tr2_tgt *tr2_tgt_builtins[] =
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{
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&tr2_tgt_normal,
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&tr2_tgt_perf,
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&tr2_tgt_event,
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NULL
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};
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/* clang-format on */
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/* clang-format off */
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#define for_each_builtin(j, tgt_j) \
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for (j = 0, tgt_j = tr2_tgt_builtins[j]; \
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tgt_j; \
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j++, tgt_j = tr2_tgt_builtins[j])
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/* clang-format on */
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/* clang-format off */
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#define for_each_wanted_builtin(j, tgt_j) \
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for_each_builtin(j, tgt_j) \
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if (tr2_dst_trace_want(tgt_j->pdst))
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/* clang-format on */
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/*
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* Force (rather than lazily) initialize any of the requested
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* builtin TRACE2 targets at startup (and before we've seen an
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* actual TRACE2 event call) so we can see if we need to setup
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* the TR2 and TLS machinery.
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*
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* Return the number of builtin targets enabled.
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*/
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static int tr2_tgt_want_builtins(void)
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{
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struct tr2_tgt *tgt_j;
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int j;
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int sum = 0;
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for_each_builtin (j, tgt_j)
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if (tgt_j->pfn_init())
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sum++;
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return sum;
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}
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/*
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* Properly terminate each builtin target. Give each target
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* a chance to write a summary event and/or flush if necessary
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* and then close the fd.
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*/
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static void tr2_tgt_disable_builtins(void)
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{
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struct tr2_tgt *tgt_j;
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int j;
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for_each_builtin (j, tgt_j)
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tgt_j->pfn_term();
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}
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static int tr2main_exit_code;
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/*
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* Our atexit routine should run after everything has finished.
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*
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* Note that events generated here might not actually appear if
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* we are writing to fd 1 or 2 and our atexit routine runs after
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* the pager's atexit routine (since it closes them to shutdown
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* the pipes).
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*/
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static void tr2main_atexit_handler(void)
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{
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struct tr2_tgt *tgt_j;
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int j;
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uint64_t us_now;
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uint64_t us_elapsed_absolute;
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us_now = getnanotime() / 1000;
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us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
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/*
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* Clear any unbalanced regions so that our atexit message
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* does not appear nested. This improves the appearance of
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* the trace output if someone calls die(), for example.
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*/
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tr2tls_pop_unwind_self();
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_atexit)
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tgt_j->pfn_atexit(us_elapsed_absolute,
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tr2main_exit_code);
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tr2_tgt_disable_builtins();
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tr2tls_release();
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tr2_sid_release();
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tr2_cmd_name_release();
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tr2_cfg_free_patterns();
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tr2_cfg_free_env_vars();
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tr2_sysenv_release();
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trace2_enabled = 0;
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}
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static void tr2main_signal_handler(int signo)
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{
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struct tr2_tgt *tgt_j;
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int j;
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uint64_t us_now;
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uint64_t us_elapsed_absolute;
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us_now = getnanotime() / 1000;
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us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_signal)
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tgt_j->pfn_signal(us_elapsed_absolute, signo);
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sigchain_pop(signo);
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raise(signo);
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}
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void trace2_initialize_clock(void)
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{
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tr2tls_start_process_clock();
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}
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void trace2_initialize_fl(const char *file, int line)
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{
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struct tr2_tgt *tgt_j;
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int j;
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if (trace2_enabled)
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return;
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tr2_sysenv_load();
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if (!tr2_tgt_want_builtins())
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return;
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trace2_enabled = 1;
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tr2_sid_get();
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atexit(tr2main_atexit_handler);
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sigchain_push(SIGPIPE, tr2main_signal_handler);
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tr2tls_init();
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/*
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* Emit 'version' message on each active builtin target.
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*/
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_version_fl)
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tgt_j->pfn_version_fl(file, line);
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}
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int trace2_is_enabled(void)
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{
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return trace2_enabled;
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}
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void trace2_cmd_start_fl(const char *file, int line, const char **argv)
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{
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struct tr2_tgt *tgt_j;
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int j;
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uint64_t us_now;
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uint64_t us_elapsed_absolute;
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if (!trace2_enabled)
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return;
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us_now = getnanotime() / 1000;
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us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_start_fl)
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tgt_j->pfn_start_fl(file, line, us_elapsed_absolute,
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argv);
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}
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int trace2_cmd_exit_fl(const char *file, int line, int code)
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{
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struct tr2_tgt *tgt_j;
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int j;
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uint64_t us_now;
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uint64_t us_elapsed_absolute;
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code &= 0xff;
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if (!trace2_enabled)
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return code;
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trace2_collect_process_info(TRACE2_PROCESS_INFO_EXIT);
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tr2main_exit_code = code;
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us_now = getnanotime() / 1000;
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us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_exit_fl)
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tgt_j->pfn_exit_fl(file, line, us_elapsed_absolute,
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code);
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return code;
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}
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void trace2_cmd_error_va_fl(const char *file, int line, const char *fmt,
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va_list ap)
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{
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struct tr2_tgt *tgt_j;
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int j;
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if (!trace2_enabled)
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return;
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/*
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* We expect each target function to treat 'ap' as constant
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* and use va_copy (because an 'ap' can only be walked once).
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*/
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_error_va_fl)
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tgt_j->pfn_error_va_fl(file, line, fmt, ap);
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}
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void trace2_cmd_path_fl(const char *file, int line, const char *pathname)
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{
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struct tr2_tgt *tgt_j;
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int j;
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if (!trace2_enabled)
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return;
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_command_path_fl)
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tgt_j->pfn_command_path_fl(file, line, pathname);
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}
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void trace2_cmd_name_fl(const char *file, int line, const char *name)
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{
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struct tr2_tgt *tgt_j;
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const char *hierarchy;
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int j;
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if (!trace2_enabled)
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return;
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tr2_cmd_name_append_hierarchy(name);
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hierarchy = tr2_cmd_name_get_hierarchy();
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_command_name_fl)
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tgt_j->pfn_command_name_fl(file, line, name, hierarchy);
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}
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void trace2_cmd_mode_fl(const char *file, int line, const char *mode)
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{
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struct tr2_tgt *tgt_j;
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int j;
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if (!trace2_enabled)
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return;
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_command_mode_fl)
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tgt_j->pfn_command_mode_fl(file, line, mode);
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}
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void trace2_cmd_alias_fl(const char *file, int line, const char *alias,
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const char **argv)
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{
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struct tr2_tgt *tgt_j;
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int j;
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if (!trace2_enabled)
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return;
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_alias_fl)
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tgt_j->pfn_alias_fl(file, line, alias, argv);
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}
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void trace2_cmd_list_config_fl(const char *file, int line)
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{
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if (!trace2_enabled)
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return;
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tr2_cfg_list_config_fl(file, line);
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}
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void trace2_cmd_list_env_vars_fl(const char *file, int line)
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{
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if (!trace2_enabled)
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return;
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tr2_list_env_vars_fl(file, line);
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}
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void trace2_cmd_set_config_fl(const char *file, int line, const char *key,
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const char *value)
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{
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if (!trace2_enabled)
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return;
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tr2_cfg_set_fl(file, line, key, value);
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}
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void trace2_child_start_fl(const char *file, int line,
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struct child_process *cmd)
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{
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struct tr2_tgt *tgt_j;
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int j;
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uint64_t us_now;
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uint64_t us_elapsed_absolute;
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if (!trace2_enabled)
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return;
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us_now = getnanotime() / 1000;
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us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
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cmd->trace2_child_id = tr2tls_locked_increment(&tr2_next_child_id);
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cmd->trace2_child_us_start = us_now;
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_child_start_fl)
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tgt_j->pfn_child_start_fl(file, line,
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us_elapsed_absolute, cmd);
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}
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void trace2_child_exit_fl(const char *file, int line, struct child_process *cmd,
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int child_exit_code)
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{
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struct tr2_tgt *tgt_j;
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int j;
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uint64_t us_now;
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uint64_t us_elapsed_absolute;
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uint64_t us_elapsed_child;
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if (!trace2_enabled)
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return;
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us_now = getnanotime() / 1000;
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us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
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if (cmd->trace2_child_us_start)
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us_elapsed_child = us_now - cmd->trace2_child_us_start;
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else
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us_elapsed_child = 0;
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_child_exit_fl)
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tgt_j->pfn_child_exit_fl(file, line,
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us_elapsed_absolute,
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cmd->trace2_child_id, cmd->pid,
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child_exit_code,
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us_elapsed_child);
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}
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int trace2_exec_fl(const char *file, int line, const char *exe,
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const char **argv)
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{
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struct tr2_tgt *tgt_j;
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int j;
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int exec_id;
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uint64_t us_now;
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uint64_t us_elapsed_absolute;
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if (!trace2_enabled)
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return -1;
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us_now = getnanotime() / 1000;
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us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
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exec_id = tr2tls_locked_increment(&tr2_next_exec_id);
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_exec_fl)
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tgt_j->pfn_exec_fl(file, line, us_elapsed_absolute,
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exec_id, exe, argv);
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return exec_id;
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}
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void trace2_exec_result_fl(const char *file, int line, int exec_id, int code)
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{
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struct tr2_tgt *tgt_j;
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int j;
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uint64_t us_now;
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uint64_t us_elapsed_absolute;
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if (!trace2_enabled)
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return;
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us_now = getnanotime() / 1000;
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us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_exec_result_fl)
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tgt_j->pfn_exec_result_fl(
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file, line, us_elapsed_absolute, exec_id, code);
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}
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void trace2_thread_start_fl(const char *file, int line, const char *thread_name)
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{
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struct tr2_tgt *tgt_j;
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int j;
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uint64_t us_now;
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uint64_t us_elapsed_absolute;
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if (!trace2_enabled)
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return;
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if (tr2tls_is_main_thread()) {
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/*
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* We should only be called from the new thread's thread-proc,
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* so this is technically a bug. But in those cases where the
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* main thread also runs the thread-proc function (or when we
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* are built with threading disabled), we need to allow it.
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*
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* Convert this call to a region-enter so the nesting looks
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* correct.
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*/
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trace2_region_enter_printf_fl(file, line, NULL, NULL, NULL,
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"thread-proc on main: %s",
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thread_name);
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return;
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}
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us_now = getnanotime() / 1000;
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us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
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tr2tls_create_self(thread_name, us_now);
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_thread_start_fl)
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tgt_j->pfn_thread_start_fl(file, line,
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us_elapsed_absolute);
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}
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void trace2_thread_exit_fl(const char *file, int line)
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{
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struct tr2_tgt *tgt_j;
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int j;
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uint64_t us_now;
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uint64_t us_elapsed_absolute;
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uint64_t us_elapsed_thread;
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if (!trace2_enabled)
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return;
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if (tr2tls_is_main_thread()) {
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/*
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* We should only be called from the exiting thread's
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* thread-proc, so this is technically a bug. But in
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* those cases where the main thread also runs the
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* thread-proc function (or when we are built with
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* threading disabled), we need to allow it.
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*
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* Convert this call to a region-leave so the nesting
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* looks correct.
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*/
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trace2_region_leave_printf_fl(file, line, NULL, NULL, NULL,
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"thread-proc on main");
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return;
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}
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us_now = getnanotime() / 1000;
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us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
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/*
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* Clear any unbalanced regions and then get the relative time
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* for the outer-most region (which we pushed when the thread
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* started). This gives us the run time of the thread.
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*/
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tr2tls_pop_unwind_self();
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us_elapsed_thread = tr2tls_region_elasped_self(us_now);
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_thread_exit_fl)
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tgt_j->pfn_thread_exit_fl(file, line,
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us_elapsed_absolute,
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us_elapsed_thread);
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tr2tls_unset_self();
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}
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void trace2_def_param_fl(const char *file, int line, const char *param,
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const char *value)
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{
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struct tr2_tgt *tgt_j;
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int j;
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if (!trace2_enabled)
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return;
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for_each_wanted_builtin (j, tgt_j)
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if (tgt_j->pfn_param_fl)
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tgt_j->pfn_param_fl(file, line, param, value);
|
|
}
|
|
|
|
void trace2_def_repo_fl(const char *file, int line, struct repository *repo)
|
|
{
|
|
struct tr2_tgt *tgt_j;
|
|
int j;
|
|
|
|
if (!trace2_enabled)
|
|
return;
|
|
|
|
if (repo->trace2_repo_id)
|
|
return;
|
|
|
|
repo->trace2_repo_id = tr2tls_locked_increment(&tr2_next_repo_id);
|
|
|
|
for_each_wanted_builtin (j, tgt_j)
|
|
if (tgt_j->pfn_repo_fl)
|
|
tgt_j->pfn_repo_fl(file, line, repo);
|
|
}
|
|
|
|
void trace2_region_enter_printf_va_fl(const char *file, int line,
|
|
const char *category, const char *label,
|
|
const struct repository *repo,
|
|
const char *fmt, va_list ap)
|
|
{
|
|
struct tr2_tgt *tgt_j;
|
|
int j;
|
|
uint64_t us_now;
|
|
uint64_t us_elapsed_absolute;
|
|
|
|
if (!trace2_enabled)
|
|
return;
|
|
|
|
us_now = getnanotime() / 1000;
|
|
us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
|
|
|
|
/*
|
|
* Print the region-enter message at the current nesting
|
|
* (indentation) level and then push a new level.
|
|
*
|
|
* We expect each target function to treat 'ap' as constant
|
|
* and use va_copy.
|
|
*/
|
|
for_each_wanted_builtin (j, tgt_j)
|
|
if (tgt_j->pfn_region_enter_printf_va_fl)
|
|
tgt_j->pfn_region_enter_printf_va_fl(
|
|
file, line, us_elapsed_absolute, category,
|
|
label, repo, fmt, ap);
|
|
|
|
tr2tls_push_self(us_now);
|
|
}
|
|
|
|
void trace2_region_enter_fl(const char *file, int line, const char *category,
|
|
const char *label, const struct repository *repo, ...)
|
|
{
|
|
va_list ap;
|
|
va_start(ap, repo);
|
|
trace2_region_enter_printf_va_fl(file, line, category, label, repo,
|
|
NULL, ap);
|
|
va_end(ap);
|
|
|
|
}
|
|
|
|
void trace2_region_enter_printf_fl(const char *file, int line,
|
|
const char *category, const char *label,
|
|
const struct repository *repo,
|
|
const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
trace2_region_enter_printf_va_fl(file, line, category, label, repo, fmt,
|
|
ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
#ifndef HAVE_VARIADIC_MACROS
|
|
void trace2_region_enter_printf(const char *category, const char *label,
|
|
const struct repository *repo, const char *fmt,
|
|
...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
trace2_region_enter_printf_va_fl(NULL, 0, category, label, repo, fmt,
|
|
ap);
|
|
va_end(ap);
|
|
}
|
|
#endif
|
|
|
|
void trace2_region_leave_printf_va_fl(const char *file, int line,
|
|
const char *category, const char *label,
|
|
const struct repository *repo,
|
|
const char *fmt, va_list ap)
|
|
{
|
|
struct tr2_tgt *tgt_j;
|
|
int j;
|
|
uint64_t us_now;
|
|
uint64_t us_elapsed_absolute;
|
|
uint64_t us_elapsed_region;
|
|
|
|
if (!trace2_enabled)
|
|
return;
|
|
|
|
us_now = getnanotime() / 1000;
|
|
us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
|
|
|
|
/*
|
|
* Get the elapsed time in the current region before we
|
|
* pop it off the stack. Pop the stack. And then print
|
|
* the perf message at the new (shallower) level so that
|
|
* it lines up with the corresponding push/enter.
|
|
*/
|
|
us_elapsed_region = tr2tls_region_elasped_self(us_now);
|
|
|
|
tr2tls_pop_self();
|
|
|
|
/*
|
|
* We expect each target function to treat 'ap' as constant
|
|
* and use va_copy.
|
|
*/
|
|
for_each_wanted_builtin (j, tgt_j)
|
|
if (tgt_j->pfn_region_leave_printf_va_fl)
|
|
tgt_j->pfn_region_leave_printf_va_fl(
|
|
file, line, us_elapsed_absolute,
|
|
us_elapsed_region, category, label, repo, fmt,
|
|
ap);
|
|
}
|
|
|
|
void trace2_region_leave_fl(const char *file, int line, const char *category,
|
|
const char *label, const struct repository *repo, ...)
|
|
{
|
|
va_list ap;
|
|
va_start(ap, repo);
|
|
trace2_region_leave_printf_va_fl(file, line, category, label, repo,
|
|
NULL, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
void trace2_region_leave_printf_fl(const char *file, int line,
|
|
const char *category, const char *label,
|
|
const struct repository *repo,
|
|
const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
trace2_region_leave_printf_va_fl(file, line, category, label, repo, fmt,
|
|
ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
#ifndef HAVE_VARIADIC_MACROS
|
|
void trace2_region_leave_printf(const char *category, const char *label,
|
|
const struct repository *repo, const char *fmt,
|
|
...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
trace2_region_leave_printf_va_fl(NULL, 0, category, label, repo, fmt,
|
|
ap);
|
|
va_end(ap);
|
|
}
|
|
#endif
|
|
|
|
void trace2_data_string_fl(const char *file, int line, const char *category,
|
|
const struct repository *repo, const char *key,
|
|
const char *value)
|
|
{
|
|
struct tr2_tgt *tgt_j;
|
|
int j;
|
|
uint64_t us_now;
|
|
uint64_t us_elapsed_absolute;
|
|
uint64_t us_elapsed_region;
|
|
|
|
if (!trace2_enabled)
|
|
return;
|
|
|
|
us_now = getnanotime() / 1000;
|
|
us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
|
|
us_elapsed_region = tr2tls_region_elasped_self(us_now);
|
|
|
|
for_each_wanted_builtin (j, tgt_j)
|
|
if (tgt_j->pfn_data_fl)
|
|
tgt_j->pfn_data_fl(file, line, us_elapsed_absolute,
|
|
us_elapsed_region, category, repo,
|
|
key, value);
|
|
}
|
|
|
|
void trace2_data_intmax_fl(const char *file, int line, const char *category,
|
|
const struct repository *repo, const char *key,
|
|
intmax_t value)
|
|
{
|
|
struct strbuf buf_string = STRBUF_INIT;
|
|
|
|
if (!trace2_enabled)
|
|
return;
|
|
|
|
strbuf_addf(&buf_string, "%" PRIdMAX, value);
|
|
trace2_data_string_fl(file, line, category, repo, key, buf_string.buf);
|
|
strbuf_release(&buf_string);
|
|
}
|
|
|
|
void trace2_data_json_fl(const char *file, int line, const char *category,
|
|
const struct repository *repo, const char *key,
|
|
const struct json_writer *value)
|
|
{
|
|
struct tr2_tgt *tgt_j;
|
|
int j;
|
|
uint64_t us_now;
|
|
uint64_t us_elapsed_absolute;
|
|
uint64_t us_elapsed_region;
|
|
|
|
if (!trace2_enabled)
|
|
return;
|
|
|
|
us_now = getnanotime() / 1000;
|
|
us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
|
|
us_elapsed_region = tr2tls_region_elasped_self(us_now);
|
|
|
|
for_each_wanted_builtin (j, tgt_j)
|
|
if (tgt_j->pfn_data_json_fl)
|
|
tgt_j->pfn_data_json_fl(file, line, us_elapsed_absolute,
|
|
us_elapsed_region, category,
|
|
repo, key, value);
|
|
}
|
|
|
|
void trace2_printf_va_fl(const char *file, int line, const char *fmt,
|
|
va_list ap)
|
|
{
|
|
struct tr2_tgt *tgt_j;
|
|
int j;
|
|
uint64_t us_now;
|
|
uint64_t us_elapsed_absolute;
|
|
|
|
if (!trace2_enabled)
|
|
return;
|
|
|
|
us_now = getnanotime() / 1000;
|
|
us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
|
|
|
|
/*
|
|
* We expect each target function to treat 'ap' as constant
|
|
* and use va_copy.
|
|
*/
|
|
for_each_wanted_builtin (j, tgt_j)
|
|
if (tgt_j->pfn_printf_va_fl)
|
|
tgt_j->pfn_printf_va_fl(file, line, us_elapsed_absolute,
|
|
fmt, ap);
|
|
}
|
|
|
|
void trace2_printf_fl(const char *file, int line, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
trace2_printf_va_fl(file, line, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
#ifndef HAVE_VARIADIC_MACROS
|
|
void trace2_printf(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
trace2_printf_va_fl(NULL, 0, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
#endif
|
|
|
|
const char *trace2_session_id(void)
|
|
{
|
|
return tr2_sid_get();
|
|
}
|