site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com Thread-index: AcgcgRAViflnDzaiQU+8MmVwkGTeLA== Thread-topic: libgmalloc problem Hi all. Hopefully this is the right list to report this problem. To debug our SW, we try to use libgmalloc, as described here: http://developer.apple.com/technotes/tn2004/tn2124.html However we encountered troubles with libgmalloc. The following simple program is good enough to demonstrate it. /* problem.c */ #include <stdio.h> int main(int argc, char** argv) { int i; for(i = 0; i < argc; i++) printf("argv[%d]: %s\n", i, argv[i]); return 0; } The following commands then lead to a crash: $ gcc -O2 -fomit-frame-pointer problem.c $ DYLD_INSERT_LIBRARIES=/usr/lib/libgmalloc.dylib ./a.out foo bar Allocations will be placed on word (4 byte) boundaries. - Small buffer overruns may not be noticed. - Applications using AltiVec instructions may fail. GuardMalloc-11 Segmentation fault (core dumped) Backtrace from gdb shows: #0 0x9b1e7882 in GMmalloc () #1 0x900f6b7b in localeconv_l () #2 0x9000b201 in __vfprintf () #3 0x900e3b50 in vfprintf_l () #4 0x9001c90f in printf () #5 0x00001f8f in main () When not using -fomit-frame-pointer or not using libgmalloc, the program works as expected. Our configuration: - Intel based mac with Mac OS X 10.4.x - gcc 4.0.1 Is it bug in gcc or in libgmalloc, or is it (documented?) limitation of libgmalloc? What compiler/linker options can/cannot be used with libgmalloc? Any relevant answer or pointer to documentation would be appreciated. Mity _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... This email sent to site_archiver@lists.apple.com