Gdb Error In Re-setting Breakpoint
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Error In Re-setting Breakpoint 1: Cannot Access Memory At Address
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Gdb Cannot Access Memory At Address
this error up vote 0 down vote favorite I am trying to compile and debug my code, runs on gcc 4.8.1 and using gdb version 7.5.1. I am not sure what is causing this error, I cannot set a breakpoint or use start on gdb, all of them give the same (similar) error: Error in re-setting breakpoint 1: Cannot access memory at address 0xe0b01c I saw this answer gdb error in re-settings breakpoint (cannot access memory), but i am not using -fPIE, I am using -fPIC though, and 7.7.1 has same issue. Is this issue due to gdb/gcc version or some flags? I am using: -g -std=c++1 -D__GCC_EXPERIMENTAL_CXX0X__=1 c++ gdb breakpoints share|improve this question edited Jun 20 at 2:44 user0370730 218 asked Jun 19 at 22:31 Rohit 11 add a comment| 1 Answer 1 active oldest votes up vote 0 down vote Is this issue due to gdb/gcc version or some flags? You didn't say whether you are setting breakpoint in the main executable, or in a shared library. The address: 0xe0b01c looks like it came from a shared library or a PIE executable. In any case, GCC version has nothing to do with this, but your GDB is quite old. The standard solution is to use (gdb) start, then enable to re-enable the breakpoint (by the time you stop on main, the PIE executable and all directly-linked shared libraries have been relocated to their final addresses). share|improve this answer answered Jun 20 at 9:04 Employed Russian 86.4k14118171 I did try running (gdb) start , which puts a temporary breakpoint and never hits it. Temporary breakpoint 2 at 0xe0a982: file main.cc, line 106 Error in re-setting breakpoint 1: Cannot access memory at address 0xe0a9
| Forgot Password Login: [x] Bug9224 - gdb 6.4 prints errors when restarting program with pending breakpoints Summary: gdb 6.4 prints errors when restarting program with pending breakpoints Status: RESOLVED FIXED Alias: None Product: gdb Classification: Unclassified Component: breakpoints (show other bugs) Version: 6.4 Importance: P3 normal Target Milestone: --- Assignee: Not yet assigned to anyone URL: Keywords: Depends on: Blocks: Reported: 2006-04-22 16:38 UTC by gnu Modified: 2011-08-17 15:27 UTC (History) CC List: 3 users (show) gdb-prs glaw tromey See Also: Host: Target: Build: Last reconfirmed: Attachments http://stackoverflow.com/questions/37912485/error-in-re-setting-breakpoint-1-cannot-access-memory-at-address-what-is-the Add an attachment (proposed patch, testcase, etc.) Note You need to log in before you can comment on or make changes to this bug. Description gnu 2006-04-22 16:38:01 UTC [Converted from Gnats 2119] When restarting a program that has breakpoints pending on library loads that have been resolved, I get error messages telling me that the breakpoint can't be found: Error in re-setting breakpoint 2: https://sourceware.org/bugzilla/show_bug.cgi?id=9224 Function "foo" not defined. Error in re-setting breakpoint 2: Function "foo" not defined. Error in re-setting breakpoint 2: Function "foo" not defined. Error in re-setting breakpoint 2: Function "foo" not defined. Error in re-setting breakpoint 2: Function "foo" not defined. Error in re-setting breakpoint 2: Function "foo" not defined. Error in re-setting breakpoint 2: Function "foo" not defined. I've had a quick look at the source, and the message seems to be coming from decode_variable() The comment for this function says: /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL, look in that symtab's static variables first. If NOT_FOUND_PTR is not NULL and the function cannot be found, store boolean true in the location pointed to and do not issue an error message. */ but at the bottom of the function it says: if (not_found_ptr) *not_found_ptr = 1; throw_error (NOT_FOUND_ERROR, _("Function \"%s\" not defined."), copy); I've had a look on 6.3, and it seems here the function code agrees with the comment: if (not_found_ptr) { *not_found_ptr = 1; /* The caller has indicated that it wishes quiet notification of any error where the function or file is not foun
Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more http://reverseengineering.stackexchange.com/questions/8724/set-a-breakpoint-on-gdb-entry-point-for-stripped-pie-binaries-without-disabling about Stack Overflow the company Business Learn more about hiring developers or posting ads https://www.quora.com/Im-debugging-C-code-with-a-GDB-However-I-keep-getting-Error-in-re-setting-breakpoint-1-No-symbol-table-is-loaded-Use-the-file-command-The-breakpoint-1-is-in-the-child-process-How-can-I-fix-this with us Reverse Engineering beta Questions Tags Users Badges Unanswered Ask Question _ Reverse Engineering Stack Exchange is a question and answer site for researchers and developers who explore the principles of a system through analysis of its structure, function, and operation. Join them; it only takes a minute: Sign up Here's how it works: cannot access Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Set a breakpoint on GDB entry point for stripped PIE binaries without disabling ASLR up vote 8 down vote favorite 3 Given a position-independent, statically-linked, stripped binary, there does not appear to be a way in GDB to set a breakpoint at the entry point without disabling ASLR. break start cannot access memory and similar functions do not work, because there is no symbolic information set stop-on-solib-events 1 does not work as the binary is not dynamically linked break *0xdeadbeef for the entry point does not work, as the entry point is unresolved until the binary starts catch load does not work, as it does not load any libraries start does not work, as main is not defined and no libraries are loaded Without patching the binary, what mechanism can I use to break at the first instruction executed? Possible? Since a now-deleted response to the question said that a PIE statically-linked binary is impossible, a trivial example is the linker itself. It is statically linked. $ ldd /lib/x86_64-linux-gnu/ld-2.19.so statically linked It is executable. $ strace /lib/x86_64-linux-gnu/ld-2.19.so execve("/lib/x86_64-linux-gnu/ld-2.19.so", ["/lib/x86_64-linux-gnu/ld-2.19.so"], [/* 96 vars */]) = 0 brk(0) = 0x7ff787b3d000 writev(2, [{"Usage: ld.so [OPTION]... EXECUTA"..., 1373}], 1Usage: ld.so [OPTION]... EXECUTABLE-FILE [ARGS-FOR-PROGRAM...] It is position-independent. $ readelf -h /lib/x86_64-linux-gnu/ld-2.19.so | grep DYN Type: DYN (Shared object file) Solutions It looks like this can be done with Python by utilizing some of the events made available: http://asciinema.org/a/19078 However, I'd like a native-GDB solution. A successful solution will break at _start in ld.so when executed directly without disabling ASLR. It should look so
Languages Personal QuestionI'm debugging C code with a GDB. However, I keep getting "Error in re-setting breakpoint 1: No symbol table is loaded. Use the "file" command." The breakpoint 1 is in the child process. How can I fix this?I "set follow-fork-mode child" to debug the child process.UpdateCancelPromoted by Metavision.comStay on top of the latest augmented reality (AR) happeningsPokémon GO barely touched on AR's potential. Read these AR-related sites to keep up with the industryLearn More at Metavision.comAnswer Wiki1 Answer Jens Rantil, Developer, life hacker and inspired SwedeWritten 58w agoAre both applications compiled with debugging symbols?298 ViewsView More AnswersRelated QuestionsI debug the JOS (MIT 6.828) OS, but when I set breakpoint on the lib file or user program file, GBD can't find the breakpoint and just go away...How can I add a breakpoint in XML and JSP files while debugging a code in Eclipse?I really, really want to learn to code. However, upon taking classes and practicing (in C), I realized that I hate the whole process of progra...I'm trying to run a type-safe activator and I keep getting the error: org.fusesource.jansi#jansi; 1.11: not found. How can I fix this?I'm getting "Error: can't open file Setup-1.bin Parameter name: Setup-1.bin" while installing Call of Duty Ghosts Black Box. How can I fix thi...I am getting the following errors in the vhdl code (using passive process) when I ran it on xilinx ISE 12.1. How to get rid of them? Find the ...I am a beginner in QT development using C++. I wrote a "hello world" program. I am trying to compile and run it using command prompt, but I al...GDB: how do I debug a C function stored in a different file from my main?In C, is it a good practice to use sizeof(char) instead of 1?I don't have RubyMine. Is there a freely available Ruby 2.0+ debugger where you can set a breakpoint and step through the Ruby code?When I use "docker-compose up" command I get "client and server don't have same version (client: 1.14, server: 1.12)" error but the client and...Could anybody tell me a basic software to code in 'C'? I tried using Dev C++ but I keep getting error messages which are beyond my comprehensi...I'm trying to run an iPython notebook, I'm using Windows 8.1 and Python 2.7.9, and there is an error in the details. What is the cause for thi...Why do I keep getting this error on XCode: "thread 1: signal SIGABRT"?How do I code 1 to 5 multiplication table using nested while loop?I'm trying out a form validation tutorial in CodeIgniter[1], however my form keeps submitting to 'index.php/index.php/form' instead of 'index....What should I add to this C code to req