Cannot Access Memory At Address Gdb Error
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Gdb Cannot Access Memory At Address Breakpoint
with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow gdb cannot access memory at address 0x1 is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up gdb can't access memory address error up vote 6 down vote favorite here gdb cannot access memory at address 0x0 is my disas code: 0x0804844d <+0>: push %ebp 0x0804844e <+1>: mov %esp,%ebp 0x08048450 <+3>: and $0xfffffff0,%esp 0x08048453 <+6>: sub $0x20,%esp 0x08048456 <+9>: movl $0x8048540,(%esp) 0x0804845d <+16>: call 0x8048310
Cannot Access Memory At Address 0xffffffff
<+64>: jmp 0x804849b
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Cannot Access Memory At Address 0x4
million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Cannot access memory at address error up vote 4 down vote favorite 3 I'm getting this error: Program received http://stackoverflow.com/questions/30139356/gdb-cant-access-memory-address-error signal SIGSEGV, Segmentation fault. 0x0000000000407265 in Quadtree::deeper (this=0x7fffffffe430, orig=@0x7fffffffe430, n=@0x7a1da0, tol=Cannot access memory at address 0x7fffff3feffc ) at quadtree.cpp:47 47 int Quadtree::deeper(QuadtreeNode * & orig, QuadtreeNode * & n, int tol, int tolNum) { This is line 47: int Quadtree::deeper(QuadtreeNode * & orig, QuadtreeNode * & n, int tol, int tolNum) { Whats weird is that I am not getting any valgrind errors at all, but only gdb error and seg fault http://stackoverflow.com/questions/5519824/cannot-access-memory-at-address-error at run time. What can this error possibly mean in a general sense (without having to see the rest of my code)? c++ share|improve this question asked Apr 1 '11 at 23:12 moby 12.2k27115226 I doubt anyone can help you without some more information. –GWW Apr 1 '11 at 23:14 But what does this error mean? –moby Apr 1 '11 at 23:14 @bitmoe: dangling pointer or stack overflow e.g. –Erik Apr 1 '11 at 23:15 1 means you have a bad pointer or object reference.... –Keith Nicholas Apr 1 '11 at 23:16 it looks possibly like you passed a negative number as a pointer /reference somewhere –Keith Nicholas Apr 1 '11 at 23:19 | show 1 more comment 2 Answers 2 active oldest votes up vote 10 down vote accepted My best guess: you are seeing a stack overflow (What a coincidence, given the site we're on! :). I can't explain why Valgrind isn't catching it though: usually Valgrind uses the same stack size as the OS (at least on my system). What this error means is that your code tried to access memory at address 0x7fffff3feffc -- either a read or a write, but that address is not currently memory-mapped into your address space. The ins