address-sanitizer

问题 When I compile my C++ code with -fsanitize=address , my software prints out a list of leaks at the time it exits. Is there a way to avoid the leaks report (I'm only interested in memory corruptions, not leaks)? I went to the page with ASAN flags page, but it doesn't look like any of those flags is a match. 回答1: You can run with export ASAN_OPTIONS=detect_leaks=0 or add a function to your application: const char* __asan_default_options() { return "detect_leaks=0"; } See Flags wiki for more

问题 I'm trying to get address sanitizer blacklist working in a C++ project but its not working as expected. I tried the example on their website, if I compile with clang , it works fine. build % cat suppress.txt fun:bad_foo build % cat foo.c #include <stdlib.h> void bad_foo() { int *a = (int*)malloc(40); a[10] = 1; } int main() { bad_foo(); } build % clang -fsanitize=address -fsanitize-blacklist=suppress.txt foo.c ; ./a.out Exit code: 0 But as soon as I use clang++ , its ignored. build % cp foo.c

问题 In our build system we have recently integrated ASAN tool (adding -fsanitize=address) to CFLAGS & also while linking , creating library .so files. Note:- We are using GCC 6.3 compiler. We are able to successfully build our code. But while running it fails with following issue: ==52215==ASan runtime does not come first in initial library list; you should either link runtime to your application or manually preload it with LD_PRELOAD. Here is my gcc command:- /local/common/pkgs/gcc/v6.3.0/bin

问题 I have a C++ program that uses tbb, I am compiling on 64bit Linux with GCC 6.2.1. When I compile with address sanitizer(-fsanitize=address) and run unit tests, this output is generated: ... [ PASSED ] 56 tests. ================================================================= ==12326==ERROR: LeakSanitizer: detected memory leaks Direct leak of 54 byte(s) in 3 object(s) allocated from: #0 0x7f4c634fd020 in strdup (/usr/lib64/libasan.so.3+0x58020) #1 0x301d215bb4 (/usr/lib64/libtbb.so.2

问题 Recently, when compiling with '-fsanitize=address' I am getting an execution exception when running an application with valgrind namely "ASan runtime does not come first in initial library list" I am a little clueless what valgrind actually does. The command 'ldd file.exe' delivers linux-gate.so.1 => (0xb7755000) libasan.so.3 => /usr/lib/i386-linux-gnu/libasan.so.3 (0xb7199000) libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xb6fdf000) libdl.so.2 => /lib/i386-linux-gnu/libdl.so.2 (0xb6fd8000)

问题 I just tried compiling with GCC and the -fsanitize=address flag. When I run my program, the address sanitizer finds a flaw, but the stack trace is not helpful. How can I configure this so that it points to the source code locations I need to look at? ================================================================= ==32415== ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6006004b38a0 at pc 0x10b136d5c bp 0x7fff54b8e5d0 sp 0x7fff54b8e5c8 WRITE of size 8 at 0x6006004b38a0 thread T0

问题 The following code is used to convert a sockaddr to a sockaddr_in6 to get the IPv6 address: extension sockaddr { private var addressV6: String { var me = self var buffer = [Int8](repeating: 0, count: Int(INET6_ADDRSTRLEN)) withUnsafePointer(to: &me) { $0.withMemoryRebound(to: sockaddr_in6.self, capacity: 1) { var addrV6 = $0.pointee.sin6_addr inet_ntop(AF_INET6, &addrV6, &buffer, socklen_t(INET6_ADDRSTRLEN)) } } return String(cString: buffer) } } When I run the code in Xcode 9 beta with the

问题 I am trying to compile a python extension with Address Sanitizer. When I load the extension, I get Traceback (most recent call last): File "test.py", line 2, in <module> from extension import package File "/tmp/python_test/extension/package.py", line 28, in <module> from extension._ext import * ImportError: /tmp/python_test/extension/_ext.so: undefined symbol: __asan_version_mismatch_check_v8 The compiler invocation is clang -g -o _ext.so code.ll -fsanitize=address -lrt -lpthread -ldl -lstdc+

问题 I am using gcc (SUSE Linux) 7.2.1 20171020 to compile the following C program strcmp.c: #include <stdio.h> #include <string.h> int main () { char str1[] = "e"; char str2[] = "pi"; int ret; ret = strcmp(str1, str2); printf("val: %i\n", ret); return(0); } I compile this with: gcc -Wall -Wextra -fsanitize=address strcmp.c And when I run it I get: ./a.out val: -1 This is a surprise to me, I would have expected a result of -11. And indeed I get that when I compile the program in the following way:

问题 The GCC and Clang compilers both have support for LeakSanitizer which helps finding memory leaks in C programs. Sometimes a memory leak is unavoidable (because it is being tested in a test suite for example). Such memory can be annotated using the Leak Sanitizer interface: #include <sanitizer/lsan_interface.h> void *p = create_new_object(); __lsan_ignore_object(p); This will however break on compilers that do not support LSan. In Address Sanitizer, this construct can be used to detect the