diff options
Diffstat (limited to 'gitlab/issues/target_missing/host_missing/accel_missing/967.toml')
| -rw-r--r-- | gitlab/issues/target_missing/host_missing/accel_missing/967.toml | 232 |
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diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/967.toml b/gitlab/issues/target_missing/host_missing/accel_missing/967.toml new file mode 100644 index 00000000..056b044b --- /dev/null +++ b/gitlab/issues/target_missing/host_missing/accel_missing/967.toml @@ -0,0 +1,232 @@ +id = 967 +title = "qemu 6.2 user mode memory leak when mmap + munmap is called" +state = "closed" +created_at = "2022-04-07T08:17:23.635Z" +closed_at = "2022-12-21T15:43:41.075Z" +labels = ["linux-user"] +url = "https://gitlab.com/qemu-project/qemu/-/issues/967" +host-os = "Ubuntu 22.04" +host-arch = "x86_64" +qemu-version = "qemu-x86_64 version 6.2.0 (Debian 1:6.2+dfsg-2ubuntu5)" +guest-os = "User mode emulator" +guest-arch = "x86_64" +description = """Launch a program with qemu user mode emulator, +If this program calls mmap to allocate 40GB virtual memory and call munmap to free it later, the memory const of qemu user mode emulator grows to a very big value. + +Excepted behavior: qemu-x86_64 costs very less memory after munmap is called. +Observed behavior: qemu-x86_64 costs around 2.5GiB after munmap is called. Most of the memory is consumed by [heap].""" +reproduce = """1.Compile this code with g++. +```shell +g++ -o main.bin main.cpp +``` +```cpp +#include <chrono> +#include <cstdio> +#include <sys/types.h> +#include <unistd.h> +#include <cstdlib> +#include <sys/mman.h> + +#include <thread> + +static constexpr size_t pageSize = 4096; + +int main(){ +\tconstexpr size_t size = 1024*100*pageSize*1000; + +\tvoid* data = mmap(nullptr, size, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); +\t +\tif(data == nullptr){ +\t\tperror("mmap failed"); +\t\texit(1); +\t} + +\tint error = munmap(data, size); + +\tif(error !=0){ +\t\tperror("munmap failed"); +\t\texit(1); +\t} +\t + +\tprintf("mmap munmap test done\\n"); +\twhile(true){ +\t\tstd::this_thread::sleep_for(std::chrono::seconds(10000)); +\t} +\t +\treturn 0; +} +``` +2. run main.bin with qemu-x86_64 +```shell +$ qemu-x86_64 ./main.bin +mmap munmap test done +``` +3. check memory usage by top +``` +$ top -p `pgrep "qemu"` +top - 16:00:39 up 6:41, 1 user, load average: 0.08, 0.12, 0.10 +Tasks: 1 total, 0 running, 1 sleeping, 0 stopped, 0 zombie +%Cpu(s): 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st +MiB Mem : 15969.1 total, 8249.3 free, 6048.2 used, 1671.5 buff/cache +MiB Swap: 2048.0 total, 1209.6 free, 838.4 used. 9544.3 avail Mem + + PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND + 38521 jcq 20 0 2634324 2.3g 7840 S 0.0 14.8 0:04.48 qemu-x86_64 +``` + +4. check memory usage by mmap. Heap is 5611ca5e0000-56125d125000, the size of heap is more than 2GiB. +```shell +$ cat /proc/38521/maps +4000000000-4000001000 r--p 00000000 00:35 49812 /mnt/hgfs/workspace/LearningProjects/CMakeLearn/src/main.bin +4000001000-4000002000 r--p 00001000 00:35 49812 /mnt/hgfs/workspace/LearningProjects/CMakeLearn/src/main.bin +4000002000-4000003000 r--p 00002000 00:35 49812 /mnt/hgfs/workspace/LearningProjects/CMakeLearn/src/main.bin +4000003000-4000004000 r--p 00002000 00:35 49812 /mnt/hgfs/workspace/LearningProjects/CMakeLearn/src/main.bin +4000004000-4000005000 rw-p 00003000 00:35 49812 /mnt/hgfs/workspace/LearningProjects/CMakeLearn/src/main.bin +4000005000-4000026000 rw-p 00000000 00:00 0 +4001005000-4001006000 ---p 00000000 00:00 0 +4001006000-4001806000 rw-p 00000000 00:00 0 +4001806000-400183d000 r--p 00000000 08:05 4456513 /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 +400183d000-400183e000 ---p 00000000 00:00 0 +400183e000-4001840000 r--p 00037000 08:05 4456513 /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 +4001840000-4001842000 rw-p 00039000 08:05 4456513 /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 +4001842000-4001844000 rw-p 00000000 00:00 0 +4001863000-4001a78000 r--p 00000000 08:05 4456541 /usr/lib/x86_64-linux-gnu/libc.so.6 +4001a78000-4001a7c000 r--p 00214000 08:05 4456541 /usr/lib/x86_64-linux-gnu/libc.so.6 +4001a7c000-4001a7e000 rw-p 00218000 08:05 4456541 /usr/lib/x86_64-linux-gnu/libc.so.6 +4001a7e000-4001a8d000 rw-p 00000000 00:00 0 +5611c96af000-5611c9734000 r--p 00000000 08:05 4467878 /usr/bin/qemu-x86_64 +5611c9734000-5611c9885000 r-xp 00085000 08:05 4467878 /usr/bin/qemu-x86_64 +5611c9885000-5611c9901000 r--p 001d6000 08:05 4467878 /usr/bin/qemu-x86_64 +5611c9902000-5611c993c000 r--p 00252000 08:05 4467878 /usr/bin/qemu-x86_64 +5611c993c000-5611c9950000 rw-p 0028c000 08:05 4467878 /usr/bin/qemu-x86_64 +5611c9950000-5611c996e000 rw-p 00000000 00:00 0 +5611ca5e0000-56125d125000 rw-p 00000000 00:00 0 [heap] +7f2038000000-7f203ffff000 rwxp 00000000 00:00 0 +7f203ffff000-7f2040000000 ---p 00000000 00:00 0 +7f2040000000-7f2040021000 rw-p 00000000 00:00 0 +7f2040021000-7f2044000000 ---p 00000000 00:00 0 +7f2047def000-7f2047e70000 rw-p 00000000 00:00 0 +7f2047e70000-7f2047e71000 ---p 00000000 00:00 0 +7f2047e71000-7f2048676000 rw-p 00000000 00:00 0 +7f2048676000-7f2048678000 r--p 00000000 08:05 4456538 /usr/lib/x86_64-linux-gnu/libffi.so.8.1.0 +7f2048678000-7f204867f000 r-xp 00002000 08:05 4456538 /usr/lib/x86_64-linux-gnu/libffi.so.8.1.0 +7f204867f000-7f2048680000 r--p 00009000 08:05 4456538 /usr/lib/x86_64-linux-gnu/libffi.so.8.1.0 +7f2048680000-7f2048681000 ---p 0000a000 08:05 4456538 /usr/lib/x86_64-linux-gnu/libffi.so.8.1.0 +7f2048681000-7f2048682000 r--p 0000a000 08:05 4456538 /usr/lib/x86_64-linux-gnu/libffi.so.8.1.0 +7f2048682000-7f2048683000 rw-p 0000b000 08:05 4456538 /usr/lib/x86_64-linux-gnu/libffi.so.8.1.0 +7f2048683000-7f204868d000 r--p 00000000 08:05 4457088 /usr/lib/x86_64-linux-gnu/libgmp.so.10.4.1 +7f204868d000-7f20486ec000 r-xp 0000a000 08:05 4457088 /usr/lib/x86_64-linux-gnu/libgmp.so.10.4.1 +7f20486ec000-7f2048703000 r--p 00069000 08:05 4457088 /usr/lib/x86_64-linux-gnu/libgmp.so.10.4.1 +7f2048703000-7f2048704000 r--p 0007f000 08:05 4457088 /usr/lib/x86_64-linux-gnu/libgmp.so.10.4.1 +7f2048704000-7f2048705000 rw-p 00080000 08:05 4457088 /usr/lib/x86_64-linux-gnu/libgmp.so.10.4.1 +7f2048705000-7f204870d000 r--p 00000000 08:05 4461541 /usr/lib/x86_64-linux-gnu/libhogweed.so.6.4 +7f204870d000-7f2048720000 r-xp 00008000 08:05 4461541 /usr/lib/x86_64-linux-gnu/libhogweed.so.6.4 +7f2048720000-7f204874a000 r--p 0001b000 08:05 4461541 /usr/lib/x86_64-linux-gnu/libhogweed.so.6.4 +7f204874a000-7f204874b000 ---p 00045000 08:05 4461541 /usr/lib/x86_64-linux-gnu/libhogweed.so.6.4 +7f204874b000-7f204874c000 r--p 00045000 08:05 4461541 /usr/lib/x86_64-linux-gnu/libhogweed.so.6.4 +7f204874c000-7f204874d000 rw-p 00046000 08:05 4461541 /usr/lib/x86_64-linux-gnu/libhogweed.so.6.4 +7f204874d000-7f2048757000 r--p 00000000 08:05 4464736 /usr/lib/x86_64-linux-gnu/libnettle.so.8.4 +7f2048757000-7f204877a000 r-xp 0000a000 08:05 4464736 /usr/lib/x86_64-linux-gnu/libnettle.so.8.4 +7f204877a000-7f2048790000 r--p 0002d000 08:05 4464736 /usr/lib/x86_64-linux-gnu/libnettle.so.8.4 +7f2048790000-7f2048792000 r--p 00042000 08:05 4464736 /usr/lib/x86_64-linux-gnu/libnettle.so.8.4 +7f2048792000-7f2048793000 rw-p 00044000 08:05 4464736 /usr/lib/x86_64-linux-gnu/libnettle.so.8.4 +7f2048793000-7f2048795000 rw-p 00000000 00:00 0 +7f2048795000-7f2048798000 r--p 00000000 08:05 4459610 /usr/lib/x86_64-linux-gnu/libtasn1.so.6.6.2 +7f2048798000-7f20487a6000 r-xp 00003000 08:05 4459610 /usr/lib/x86_64-linux-gnu/libtasn1.so.6.6.2 +7f20487a6000-7f20487aa000 r--p 00011000 08:05 4459610 /usr/lib/x86_64-linux-gnu/libtasn1.so.6.6.2 +7f20487aa000-7f20487ab000 ---p 00015000 08:05 4459610 /usr/lib/x86_64-linux-gnu/libtasn1.so.6.6.2 +7f20487ab000-7f20487ac000 r--p 00015000 08:05 4459610 /usr/lib/x86_64-linux-gnu/libtasn1.so.6.6.2 +7f20487ac000-7f20487ad000 rw-p 00016000 08:05 4459610 /usr/lib/x86_64-linux-gnu/libtasn1.so.6.6.2 +7f20487ad000-7f20487be000 r--p 00000000 08:05 4460136 /usr/lib/x86_64-linux-gnu/libunistring.so.2.2.0 +7f20487be000-7f20487f4000 r-xp 00011000 08:05 4460136 /usr/lib/x86_64-linux-gnu/libunistring.so.2.2.0 +7f20487f4000-7f2048952000 r--p 00047000 08:05 4460136 /usr/lib/x86_64-linux-gnu/libunistring.so.2.2.0 +7f2048952000-7f2048956000 r--p 001a5000 08:05 4460136 /usr/lib/x86_64-linux-gnu/libunistring.so.2.2.0 +7f2048956000-7f2048957000 rw-p 001a9000 08:05 4460136 /usr/lib/x86_64-linux-gnu/libunistring.so.2.2.0 +7f2048957000-7f2048959000 r--p 00000000 08:05 4465922 /usr/lib/x86_64-linux-gnu/libidn2.so.0.3.7 +7f2048959000-7f204895d000 r-xp 00002000 08:05 4465922 /usr/lib/x86_64-linux-gnu/libidn2.so.0.3.7 +7f204895d000-7f2048976000 r--p 00006000 08:05 4465922 /usr/lib/x86_64-linux-gnu/libidn2.so.0.3.7 +7f2048976000-7f2048977000 r--p 0001e000 08:05 4465922 /usr/lib/x86_64-linux-gnu/libidn2.so.0.3.7 +7f2048977000-7f2048978000 rw-p 0001f000 08:05 4465922 /usr/lib/x86_64-linux-gnu/libidn2.so.0.3.7 +7f2048978000-7f20489a1000 r--p 00000000 08:05 4459606 /usr/lib/x86_64-linux-gnu/libp11-kit.so.0.3.0 +7f20489a1000-7f2048a45000 r-xp 00029000 08:05 4459606 /usr/lib/x86_64-linux-gnu/libp11-kit.so.0.3.0 +7f2048a45000-7f2048a9f000 r--p 000cd000 08:05 4459606 /usr/lib/x86_64-linux-gnu/libp11-kit.so.0.3.0 +7f2048a9f000-7f2048aa9000 r--p 00126000 08:05 4459606 /usr/lib/x86_64-linux-gnu/libp11-kit.so.0.3.0 +7f2048aa9000-7f2048ab3000 rw-p 00130000 08:05 4459606 /usr/lib/x86_64-linux-gnu/libp11-kit.so.0.3.0 +7f2048ab3000-7f2048ab5000 r--p 00000000 08:05 4456747 /usr/lib/x86_64-linux-gnu/libpcre.so.3.13.3 +7f2048ab5000-7f2048b0a000 r-xp 00002000 08:05 4456747 /usr/lib/x86_64-linux-gnu/libpcre.so.3.13.3 +7f2048b0a000-7f2048b27000 r--p 00057000 08:05 4456747 /usr/lib/x86_64-linux-gnu/libpcre.so.3.13.3 +7f2048b27000-7f2048b28000 r--p 00073000 08:05 4456747 /usr/lib/x86_64-linux-gnu/libpcre.so.3.13.3 +7f2048b28000-7f2048b29000 rw-p 00074000 08:05 4456747 /usr/lib/x86_64-linux-gnu/libpcre.so.3.13.3 +7f2048b29000-7f2048b51000 r--p 00000000 08:05 4456541 /usr/lib/x86_64-linux-gnu/libc.so.6 +7f2048b51000-7f2048ce6000 r-xp 00028000 08:05 4456541 /usr/lib/x86_64-linux-gnu/libc.so.6 +7f2048ce6000-7f2048d3e000 r--p 001bd000 08:05 4456541 /usr/lib/x86_64-linux-gnu/libc.so.6 +7f2048d3e000-7f2048d42000 r--p 00214000 08:05 4456541 /usr/lib/x86_64-linux-gnu/libc.so.6 +7f2048d42000-7f2048d44000 rw-p 00218000 08:05 4456541 /usr/lib/x86_64-linux-gnu/libc.so.6 +7f2048d44000-7f2048d53000 rw-p 00000000 00:00 0 +7f2048d53000-7f2048d56000 r--p 00000000 08:05 4457972 /usr/lib/x86_64-linux-gnu/libgcc_s.so.1 +7f2048d56000-7f2048d6d000 r-xp 00003000 08:05 4457972 /usr/lib/x86_64-linux-gnu/libgcc_s.so.1 +7f2048d6d000-7f2048d71000 r--p 0001a000 08:05 4457972 /usr/lib/x86_64-linux-gnu/libgcc_s.so.1 +7f2048d71000-7f2048d72000 r--p 0001d000 08:05 4457972 /usr/lib/x86_64-linux-gnu/libgcc_s.so.1 +7f2048d72000-7f2048d73000 rw-p 0001e000 08:05 4457972 /usr/lib/x86_64-linux-gnu/libgcc_s.so.1 +7f2048d73000-7f2048d81000 r--p 00000000 08:05 4456717 /usr/lib/x86_64-linux-gnu/libm.so.6 +7f2048d81000-7f2048dfd000 r-xp 0000e000 08:05 4456717 /usr/lib/x86_64-linux-gnu/libm.so.6 +7f2048dfd000-7f2048e58000 r--p 0008a000 08:05 4456717 /usr/lib/x86_64-linux-gnu/libm.so.6 +7f2048e58000-7f2048e59000 r--p 000e4000 08:05 4456717 /usr/lib/x86_64-linux-gnu/libm.so.6 +7f2048e59000-7f2048e5a000 rw-p 000e5000 08:05 4456717 /usr/lib/x86_64-linux-gnu/libm.so.6 +7f2048e5a000-7f2048e8b000 r--p 00000000 08:05 4456481 /usr/lib/x86_64-linux-gnu/libgnutls.so.30.31.0 +7f2048e8b000-7f2048fb4000 r-xp 00031000 08:05 4456481 /usr/lib/x86_64-linux-gnu/libgnutls.so.30.31.0 +7f2048fb4000-7f2049031000 r--p 0015a000 08:05 4456481 /usr/lib/x86_64-linux-gnu/libgnutls.so.30.31.0 +7f2049031000-7f2049041000 r--p 001d6000 08:05 4456481 /usr/lib/x86_64-linux-gnu/libgnutls.so.30.31.0 +7f2049041000-7f2049043000 rw-p 001e6000 08:05 4456481 /usr/lib/x86_64-linux-gnu/libgnutls.so.30.31.0 +7f2049043000-7f2049045000 rw-p 00000000 00:00 0 +7f2049045000-7f2049047000 r--p 00000000 08:05 4465165 /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0.7200.0 +7f2049047000-7f2049049000 r-xp 00002000 08:05 4465165 /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0.7200.0 +7f2049049000-7f204904a000 r--p 00004000 08:05 4465165 /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0.7200.0 +7f204904a000-7f204904b000 r--p 00004000 08:05 4465165 /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0.7200.0 +7f204904b000-7f204904c000 rw-p 00005000 08:05 4465165 /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0.7200.0 +7f204904c000-7f2049069000 r--p 00000000 08:05 4465132 /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.0 +7f2049069000-7f20490f8000 r-xp 0001d000 08:05 4465132 /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.0 +7f20490f8000-7f2049182000 r--p 000ac000 08:05 4465132 /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.0 +7f2049182000-7f2049183000 ---p 00136000 08:05 4465132 /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.0 +7f2049183000-7f2049184000 r--p 00136000 08:05 4465132 /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.0 +7f2049184000-7f2049185000 rw-p 00137000 08:05 4465132 /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.0 +7f2049185000-7f2049186000 rw-p 00000000 00:00 0 +7f2049186000-7f2049188000 r--p 00000000 08:05 4463546 /usr/lib/x86_64-linux-gnu/liburing.so.2.1.0 +7f2049188000-7f204918a000 r-xp 00002000 08:05 4463546 /usr/lib/x86_64-linux-gnu/liburing.so.2.1.0 +7f204918a000-7f204918b000 r--p 00004000 08:05 4463546 /usr/lib/x86_64-linux-gnu/liburing.so.2.1.0 +7f204918b000-7f204918c000 r--p 00004000 08:05 4463546 /usr/lib/x86_64-linux-gnu/liburing.so.2.1.0 +7f204918c000-7f204918d000 rw-p 00005000 08:05 4463546 /usr/lib/x86_64-linux-gnu/liburing.so.2.1.0 +7f20491ac000-7f20491ae000 rw-p 00000000 00:00 0 +7f20491ae000-7f20491b0000 r--p 00000000 08:05 4456513 /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 +7f20491b0000-7f20491da000 r-xp 00002000 08:05 4456513 /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 +7f20491da000-7f20491e5000 r--p 0002c000 08:05 4456513 /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 +7f20491e6000-7f20491e8000 r--p 00037000 08:05 4456513 /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 +7f20491e8000-7f20491ea000 rw-p 00039000 08:05 4456513 /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 +7fffe17ee000-7fffe1810000 rw-p 00000000 00:00 0 [stack] +7fffe19d1000-7fffe19d5000 r--p 00000000 00:00 0 [vvar] +7fffe19d5000-7fffe19d7000 r-xp 00000000 00:00 0 [vdso] +ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall] +```""" +additional = """qemu is installed by ubuntu's apt. + +sudo apt install qemu-user + +compiler version: +``` +g++ --version +g++ (Ubuntu 11.2.0-19ubuntu1) 11.2.0 +Copyright (C) 2021 Free Software Foundation, Inc. +This is free software; see the source for copying conditions. There is NO +warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +``` + +libc version: +``` +ldd --version +ldd (Ubuntu GLIBC 2.35-0ubuntu3) 2.35 +Copyright (C) 2022 Free Software Foundation, Inc. +This is free software; see the source for copying conditions. There is NO +warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +Written by Roland McGrath and Ulrich Drepper. +```""" |