eal/ppc: support ASan

Add support for Address Sanitizer (ASan) for PPC/POWER architecture.

Signed-off-by: David Christensen <drc@linux.vnet.ibm.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>

config/meson.build

@@ -433,7 +433,7 @@ if get_option('b_sanitize') == 'address' or get_option('b_sanitize') == 'address
         dpdk_extra_ldflags += '-lasan'
     endif
 
-    if is_linux and arch_subdir in ['x86', 'arm'] and dpdk_conf.get('RTE_ARCH_64')
+    if is_linux and dpdk_conf.get('RTE_ARCH_64')
         dpdk_conf.set10('RTE_MALLOC_ASAN', true)
     endif
 endif

doc/guides/prog_guide/asan.rst

@@ -32,9 +32,9 @@ Example::
   - If the program is tested using cmdline, you may need to execute the
     "stty echo" command when an error occurs.
 
-ASan is aware of DPDK memory allocations, thanks to added instrumentation.
-This is enabled on x86_64 and arm64 at the moment.
-Other architectures may have to define ASAN_SHADOW_OFFSET.
+ASan is aware of DPDK memory allocations, thanks to added instrumentation, and
+is enabled on all 64 bit architectures for Linux. Other architectures may have
+to define ASAN_SHADOW_OFFSET.
 
 Example heap-buffer-overflow error
 ----------------------------------

lib/eal/common/malloc_elem.h

@@ -112,6 +112,8 @@ malloc_elem_cookies_ok(const struct malloc_elem *elem)
 #define ASAN_SHADOW_OFFSET    0x00007fff8000
 #elif defined(RTE_ARCH_ARM64)
 #define ASAN_SHADOW_OFFSET    0x001000000000
+#elif defined(RTE_ARCH_PPC_64)
+#define ASAN_SHADOW_OFFSET    0x020000000000
 #endif
 
 #define ASAN_SHADOW_GRAIN_SIZE	8