ce0b7ab6c8
The previous approach managed the thread name in a separate buffer, which causes races because the thread name update (triggered by new samples) can happen at the same time as prof dumping (which reads the thread names) -- these two operations are under separate locks to avoid blocking each other. Implemented the thread name storage as part of the tdata struct, which resolves the lifetime issue and also avoids internal alloc / dalloc during prof_sample.
37 lines
1.2 KiB
C
37 lines
1.2 KiB
C
#ifndef JEMALLOC_INTERNAL_PROF_DATA_H
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#define JEMALLOC_INTERNAL_PROF_DATA_H
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#include "jemalloc/internal/mutex.h"
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extern malloc_mutex_t bt2gctx_mtx;
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extern malloc_mutex_t tdatas_mtx;
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extern malloc_mutex_t prof_dump_mtx;
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extern malloc_mutex_t *gctx_locks;
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extern malloc_mutex_t *tdata_locks;
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extern size_t prof_unbiased_sz[PROF_SC_NSIZES];
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extern size_t prof_shifted_unbiased_cnt[PROF_SC_NSIZES];
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void prof_bt_hash(const void *key, size_t r_hash[2]);
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bool prof_bt_keycomp(const void *k1, const void *k2);
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bool prof_data_init(tsd_t *tsd);
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prof_tctx_t *prof_lookup(tsd_t *tsd, prof_bt_t *bt);
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int prof_thread_name_set_impl(tsd_t *tsd, const char *thread_name);
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void prof_unbias_map_init();
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void prof_dump_impl(tsd_t *tsd, write_cb_t *prof_dump_write, void *cbopaque,
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prof_tdata_t *tdata, bool leakcheck);
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prof_tdata_t * prof_tdata_init_impl(tsd_t *tsd, uint64_t thr_uid,
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uint64_t thr_discrim, char *thread_name, bool active);
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void prof_tdata_detach(tsd_t *tsd, prof_tdata_t *tdata);
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void prof_reset(tsd_t *tsd, size_t lg_sample);
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void prof_tctx_try_destroy(tsd_t *tsd, prof_tctx_t *tctx);
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/* Used in unit tests. */
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size_t prof_tdata_count(void);
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size_t prof_bt_count(void);
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void prof_cnt_all(prof_cnt_t *cnt_all);
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#endif /* JEMALLOC_INTERNAL_PROF_DATA_H */
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