1 2 /* Test for aspacem bug reported by Alex Bennee, reported on users 3 list around 9 Aug 06, resulting in 4 5 > > --1515:0:aspacem Valgrind: FATAL: aspacem assertion failed: 6 > > --1515:0:aspacem holeEnd <= aspacem_maxAddr 7 > > --1515:0:aspacem at m_aspacemgr/aspacemgr.c:1998 8 > > (vgPlain_am_get_advisory) 9 > > --1515:0:aspacem Exiting now. 10 11 TomH writes: 12 13 > I think the problem here is that you've done an mmap (either fixed or 14 > hinted) above aspacem_maxAddr and then munmaped it which leaves you 15 > with a free segment above aspacem_maxAddr. 16 17 The sequence seems to be that you have to allocate memory somewhere 18 above aspacem_maxAddr, then free it, then do another hinted 19 allocation that is above aspacem_maxAddr but which can't be done 20 due to the memory already being in use. This program will reproduce 21 it. 22 23 On investigation: the problem was the munmap returns its space in 24 the form of SkFree even though the space above aspacem_maxAddr is 25 supposed to be SkResvn. This is now fixed. 26 */ 27 28 #include <stdio.h> 29 #include <stdlib.h> 30 #include "tests/sys_mman.h" 31 32 int main(int argc, char **argv) 33 { 34 void *p; 35 if ((p = mmap((void*)0x1F7F100000, 4096, PROT_READ|PROT_WRITE, 36 MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0)) == (void *)-1) 37 { 38 perror("mmap"); 39 exit(1); 40 } 41 if (munmap(p, 4096) < 0) 42 { 43 perror("munmap"); 44 exit(1); 45 } 46 if ((p = mmap((void*)0x1F7F101000, 4096, PROT_READ, 47 MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)) == (void *)-1) 48 { 49 perror("mmap"); 50 exit(1); 51 } 52 if ((p = mmap((void*)0x1F7F101000, 4096, PROT_READ, 53 MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)) == (void *)-1) 54 { 55 perror("mmap"); 56 exit(1); 57 } 58 59 printf("made it through alive!\n"); 60 exit(0); 61 } 62
