Bug 157682 – Runaway malloc memory usage in this simple JSC program

• Component: New Bugs
• Status: RESOLVED FIXED

[Geoffrey Garen]

Runaway malloc memory usage in this simple JSC program

[Geoffrey Garen]

Created attachment 278865 [details]
Patch

[Geoffrey Garen]

Created attachment 278866 [details]
Patch

[Mark Lam]

Comment on attachment 278866 [details]
Patch

r=me

[Geoffrey Garen]

Committed r200884: <http://trac.webkit.org/changeset/200884>

[Geoffrey Garen]

<rdar://problem/25942874>

[Geoffrey Garen]

BTW, here is the program:

#include <JavaScriptCore/JavaScriptCore.h>
#include <stdio.h>
#include <sys/time.h>

static double currentTime()
{
    struct timeval tv;
    gettimeofday(&tv, NULL);
    return tv.tv_sec + tv.tv_usec / 1000. / 1000.;
}

int main(int argc, char** argv)
{
    JSContextGroupRef group;
    double before, after;
    unsigned i;
    
    group = JSContextGroupCreate();
    
    before = currentTime();
    
    for (i = 0; i < 100000; ++i)
        JSGlobalContextRelease(JSGlobalContextCreateInGroup(group, NULL));
    
    after = currentTime();

    printf("That took %lf ms.\n", (after - before) * 1000.);
    
    return 0;
}