a9f7732d45
Currently, the log macro requires at least one argument after the format string, because of the way the preprocessor handles varargs macros. We can hide some of that irritation by pushing the extra arguments into a varargs function.
79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
#include "jemalloc/internal/jemalloc_preamble.h"
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#include "jemalloc/internal/jemalloc_internal_includes.h"
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#include "jemalloc/internal/log.h"
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char log_var_names[JEMALLOC_LOG_VAR_BUFSIZE];
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atomic_b_t log_init_done = ATOMIC_INIT(false);
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/*
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* Returns true if we were able to pick out a segment. Fills in r_segment_end
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* with a pointer to the first character after the end of the string.
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*/
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static const char *
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log_var_extract_segment(const char* segment_begin) {
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const char *end;
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for (end = segment_begin; *end != '\0' && *end != '|'; end++) {
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}
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return end;
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}
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static bool
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log_var_matches_segment(const char *segment_begin, const char *segment_end,
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const char *log_var_begin, const char *log_var_end) {
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assert(segment_begin <= segment_end);
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assert(log_var_begin < log_var_end);
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ptrdiff_t segment_len = segment_end - segment_begin;
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ptrdiff_t log_var_len = log_var_end - log_var_begin;
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/* The special '.' segment matches everything. */
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if (segment_len == 1 && *segment_begin == '.') {
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return true;
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}
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if (segment_len == log_var_len) {
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return strncmp(segment_begin, log_var_begin, segment_len) == 0;
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} else if (segment_len < log_var_len) {
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return strncmp(segment_begin, log_var_begin, segment_len) == 0
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&& log_var_begin[segment_len] == '.';
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} else {
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return false;
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}
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}
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unsigned
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log_var_update_state(log_var_t *log_var) {
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const char *log_var_begin = log_var->name;
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const char *log_var_end = log_var->name + strlen(log_var->name);
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/* Pointer to one before the beginning of the current segment. */
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const char *segment_begin = log_var_names;
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/*
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* If log_init done is false, we haven't parsed the malloc conf yet. To
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* avoid log-spew, we default to not displaying anything.
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*/
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if (!atomic_load_b(&log_init_done, ATOMIC_ACQUIRE)) {
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return LOG_INITIALIZED_NOT_ENABLED;
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}
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while (true) {
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const char *segment_end = log_var_extract_segment(
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segment_begin);
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assert(segment_end < log_var_names + JEMALLOC_LOG_VAR_BUFSIZE);
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if (log_var_matches_segment(segment_begin, segment_end,
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log_var_begin, log_var_end)) {
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atomic_store_u(&log_var->state, LOG_ENABLED,
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ATOMIC_RELAXED);
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return LOG_ENABLED;
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}
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if (*segment_end == '\0') {
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/* Hit the end of the segment string with no match. */
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atomic_store_u(&log_var->state,
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LOG_INITIALIZED_NOT_ENABLED, ATOMIC_RELAXED);
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return LOG_INITIALIZED_NOT_ENABLED;
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}
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/* Otherwise, skip the delimiter and continue. */
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segment_begin = segment_end + 1;
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}
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}
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