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Red Hat Bugzilla – Attachment 710111 Details for
Bug 921676
free() doesn't honor M_TRIM_THRESHOLD
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testcase
testcase.cpp (text/x-c++src), 712 bytes, created by
Daniel Vrátil
on 2013-03-14 16:08:00 UTC
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Description:
testcase
Filename:
MIME Type:
Creator:
Daniel Vrátil
Created:
2013-03-14 16:08:00 UTC
Size:
712 bytes
patch
obsolete
>#include <unistd.h> >#include <malloc.h> >#include <stdio.h> > >#define NUM 2800000 > > >int main(int a, char *b[]) >{ > void **memory = (void**)malloc(sizeof(void*)*NUM); > > // 128 KB is the default value, lets set it anyway > // After 128 KB, free() should trim > mallopt(M_TRIM_THRESHOLD, 128*1024); > > int i; > for(i=0; i<NUM; i++) { > memory[i] = malloc(64); > } > > for(i=0; i<NUM; i++) { > free(memory[i]); > } > > void *first_address = memory[0]; > void *last_address = memory[NUM-1]; > > free(memory); > > printf( "Finished: %x %x\n", last_address, first_address ); // Just to make sure it's all from the heap and not mmap() > fflush(stdout); > > pause(); > > return 0; >}
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bug 921676
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