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Implement the prof.gdump mallctl.

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This feature makes it possible to toggle the gdump feature on/off during
program execution, whereas the the opt.prof_dump mallctl value can only
be set during program startup.

This resolves #72.
This commit is contained in:
Jason Evans
2015-01-25 21:16:57 -08:00
parent 41f2e692f6
commit 5b8ed5b7c9
7 changed files with 133 additions and 10 deletions
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34
src/prof.c
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@@ -44,6 +44,13 @@ static malloc_mutex_t prof_active_mtx;
static bool prof_thread_active_init;
static malloc_mutex_t prof_thread_active_init_mtx;
/*
* Initialized as opt_prof_gdump, and accessed via
* prof_gdump_[gs]et{_unlocked,}().
*/
bool prof_gdump_val;
static malloc_mutex_t prof_gdump_mtx;
uint64_t prof_interval = 0;
size_t lg_prof_sample;
@@ -1961,6 +1968,29 @@ prof_thread_active_init_set(bool active_init)
return (active_init_old);
}
bool
prof_gdump_get(void)
{
bool prof_gdump_current;
malloc_mutex_lock(&prof_gdump_mtx);
prof_gdump_current = prof_gdump_val;
malloc_mutex_unlock(&prof_gdump_mtx);
return (prof_gdump_current);
}
bool
prof_gdump_set(bool gdump)
{
bool prof_gdump_old;
malloc_mutex_lock(&prof_gdump_mtx);
prof_gdump_old = prof_gdump_val;
prof_gdump_val = gdump;
malloc_mutex_unlock(&prof_gdump_mtx);
return (prof_gdump_old);
}
void
prof_boot0(void)
{
@@ -2013,6 +2043,10 @@ prof_boot2(void)
if (malloc_mutex_init(&prof_active_mtx))
return (true);
prof_gdump_val = opt_prof_gdump;
if (malloc_mutex_init(&prof_gdump_mtx))
return (true);
prof_thread_active_init = opt_prof_thread_active_init;
if (malloc_mutex_init(&prof_thread_active_init_mtx))
return (true);