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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
/*
* Logging infrastructure that aims to support multi-threading
*/
#include "rust_log.h"
#include "rust_crate_map.h"
#include "util/array_list.h"
#include "rust_util.h"
// Reading log directives and setting log level vars
struct log_directive {
char* name;
size_t level;
};
const size_t max_log_directives = 255;
const size_t max_log_level = 255;
const size_t default_log_level = log_err;
// This is a rather ugly parser for strings in the form
// "crate1,crate2.mod3,crate3.x=1". Log levels are 0-255,
// with the most likely ones being 0-3 (defined in core::).
size_t parse_logging_spec(char* spec, log_directive* dirs) {
size_t dir = 0;
while (dir < max_log_directives && *spec) {
char* start = spec;
char cur;
while (true) {
cur = *spec;
if (cur == ',' || cur == '=' || cur == '\0') {
if (start == spec) {spec++; break;}
if (*spec != '\0') {
*spec = '\0';
spec++;
}
size_t level = max_log_level;
if (cur == '=' && *spec != '\0') {
level = *spec - '0';
if (level > max_log_level) level = max_log_level;
if (*spec) ++spec;
}
dirs[dir].name = start;
dirs[dir++].level = level;
break;
} else {
spec++;
}
}
}
return dir;
}
struct update_entry_args {
log_directive* dirs;
size_t n_dirs;
size_t *n_matches;
};
static void update_entry(const mod_entry* entry, void *cookie) {
update_entry_args *args = (update_entry_args *)cookie;
size_t level = default_log_level, longest_match = 0;
for (size_t d = 0; d < args->n_dirs; d++) {
if (strstr(entry->name, args->dirs[d].name) == entry->name &&
strlen(args->dirs[d].name) > longest_match) {
longest_match = strlen(args->dirs[d].name);
level = args->dirs[d].level;
}
}
*entry->state = level;
if (longest_match > 0) {
(*args->n_matches)++;
}
}
void update_module_map(const mod_entry* map, log_directive* dirs,
size_t n_dirs, size_t *n_matches) {
update_entry_args args = { dirs, n_dirs, n_matches };
iter_module_map(map, update_entry, &args);
}
void update_crate_map(const cratemap* map, log_directive* dirs,
size_t n_dirs, size_t *n_matches) {
update_entry_args args = { dirs, n_dirs, n_matches };
iter_crate_map(map, update_entry, &args);
}
void print_mod_name(const mod_entry* mod, void *cooke) {
printf(" %s\n", mod->name);
}
void print_crate_log_map(const cratemap* map) {
iter_crate_map(map, print_mod_name, NULL);
}
// These are pseudo-modules used to control logging in the runtime.
uint32_t log_rt_mem;
uint32_t log_rt_box;
uint32_t log_rt_comm;
uint32_t log_rt_task;
uint32_t log_rt_dom;
uint32_t log_rt_trace;
uint32_t log_rt_cache;
uint32_t log_rt_upcall;
uint32_t log_rt_timer;
uint32_t log_rt_gc;
uint32_t log_rt_stdlib;
uint32_t log_rt_kern;
uint32_t log_rt_backtrace;
uint32_t log_rt_callback;
static const mod_entry _rt_module_map[] =
{{"::rt::mem", &log_rt_mem},
{"::rt::box", &log_rt_box},
{"::rt::comm", &log_rt_comm},
{"::rt::task", &log_rt_task},
{"::rt::dom", &log_rt_dom},
{"::rt::trace", &log_rt_trace},
{"::rt::cache", &log_rt_cache},
{"::rt::upcall", &log_rt_upcall},
{"::rt::timer", &log_rt_timer},
{"::rt::gc", &log_rt_gc},
{"::rt::stdlib", &log_rt_stdlib},
{"::rt::kern", &log_rt_kern},
{"::rt::backtrace", &log_rt_backtrace},
{"::rt::callback", &log_rt_callback},
{NULL, NULL}};
void update_log_settings(void* crate_map, char* settings) {
char* buffer = NULL;
log_directive dirs[256];
size_t n_dirs = 0;
if (settings) {
if (strcmp(settings, "::help") == 0 ||
strcmp(settings, "?") == 0) {
printf("\nCrate log map:\n\n");
print_crate_log_map((const cratemap*)crate_map);
printf("\n");
exit(1);
}
size_t buflen = strlen(settings) + 1;
buffer = (char*)malloc(buflen);
strncpy(buffer, settings, buflen);
n_dirs = parse_logging_spec(buffer, &dirs[0]);
}
size_t n_matches = 0;
update_module_map(_rt_module_map, &dirs[0], n_dirs, &n_matches);
update_crate_map((const cratemap*)crate_map, &dirs[0],
n_dirs, &n_matches);
if (n_matches < n_dirs) {
fprintf(stderr, "warning: got %lu RUST_LOG specs but only matched %lu of them.\n"
"You may have mistyped a RUST_LOG spec.\n"
"Use RUST_LOG=::help to see the list of crates and modules.\n",
(unsigned long)n_dirs, (unsigned long)n_matches);
}
free(buffer);
}
extern "C" CDECL void
rust_update_log_settings(void* crate_map, char* settings) {
update_log_settings(crate_map, settings);
}
//
// Local Variables:
// mode: C++
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
// End:
//
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