On Tue, 6 Jul 2021 13:40:56 -0700
David Christensen [off-list ref] wrote:

On 6/15/21 1:12 AM, zhihongx.peng@intel.com wrote:

quoted

From: Zhihong Peng <redacted>

AddressSanitizer (ASan) is a google memory error detect
standard tool. It could help to detect use-after-free and
{heap,stack,global}-buffer overflow bugs in C/C++ programs,
print detailed error information when error happens, large
improve debug efficiency.

By referring to its implementation algorithm
(https://github.com/google/sanitizers/wiki/AddressSanitizerAlgorithm),
ported heap-buffer-overflow and use-after-freefunctions to dpdk.

Here is an example of heap-buffer-overflow bug:
	......
         char *p = rte_zmalloc(NULL, 7, 0);
         p[7] = 'a';
	......

Here is an example of use-after-free bug:
	......
         char *p = rte_zmalloc(NULL, 7, 0);
         rte_free(p);
         *p = 'a';
	......

If you want to use this feature,
you need to use the following compilation options:
-Db_lundef=false -Db_sanitize=address  

Any library dependencies here that might be architecture specific?  I 
applied the patch to a POWER9 system with RHEL 8.3 and observed a SEGV:

sudo /home/drc/src/dpdk/build/app/dpdk-testpmd -l 64-71 
--vdev=net_memif0,role=server,id=0 --vdev=net_memif1,role=client,id=0 
--no-pci -- -i --numa --port-numa-config=0,8,1,8 
--ring-numa-config=0,3,8,1,3,8 --socket-num=8
EAL: Detected 128 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Detected static linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'VA'
EAL: No available 1048576 kB hugepages reported
EAL: VFIO support initialized
AddressSanitizer:DEADLYSIGNAL
=================================================================
==3011526==ERROR: AddressSanitizer: SEGV on unknown address 
0x0002a0177bd0 (pc 0x000011411ce0 bp 0x7fffccd738b0 sp 0x7fffccd738b0 T0)
==3011526==The signal is caused by a UNKNOWN memory access.
     #0 0x11411cdc in asan_set_shadow.constprop.4 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x11411cdc)
     #1 0x114131ec in malloc_elem_alloc 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x114131ec)
     #2 0x11416adc in heap_alloc.isra.1 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x11416adc)
     #3 0x11419570 in malloc_heap_alloc_on_heap_id.isra.5 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x11419570)
     #4 0x1141977c in malloc_heap_alloc 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x1141977c)
     #5 0x11421794 in rte_malloc_socket 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x11421794)
     #6 0x11421e14 in rte_zmalloc_socket 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x11421e14)
     #7 0x11422250 in rte_zmalloc 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x11422250)
     #8 0x114222f4 in rte_calloc 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x114222f4)
     #9 0x11428fa4 in rte_service_init 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x11428fa4)
     #10 0x11433680 in rte_eal_init 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x11433680)
     #11 0x1039a734 in main 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x1039a734)
     #12 0x7fffa3664074 in generic_start_main ../csu/libc-start.c:308
     #13 0x7fffa3664260 in __libc_start_main 
../sysdeps/unix/sysv/linux/powerpc/libc-start.c:102

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV 
(/home/drc/src/dpdk/build/app/dpdk-testpmd+0x11411cdc) in 
asan_set_shadow.constprop.4
==3011526==ABORTING

Dave

ASAN says you should use -fno-omit-frame-pointer to get reasonable backtrace.