A backtrace is the series of currently active function calls for the program.
On linux and mac, it is possible to obtain the backtrace using the backtrace() function.
Questions tagged [backtrace]
417 questions
7
votes
3 answers
Backtrace from SQL query to application code?
Is there a way to find which line of code generated a MySQL statement in a Rails development log?
In order to do some performance optimization, I would like to find which part of my app is creating which MySQL queries. When I take a look at my log,…
Florian Eck
- 245
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7
votes
2 answers
How to interpret backtrace addresses for debugging with GDB
I am using backtrace() and backtrace_symbols() to output backtrace on SIGSEGV and other signals in format like this:
0: [0xb750818]
1: /opt/server/libQtScript.so.4(+0x6f42a) [0xb782c42a]
2: /opt/server/libQtScript.so.4(+0x7bffc) [0xb7838ffc]
3:…
Vincas Dargis
- 535
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6
votes
2 answers
How to "decrypt" linker method names?
I'm using backtrace to print application's stack trace and I'm getting something like
libQtCore.so.4(_ZN11QMetaObject8activateEP7QObjectPKS_iPPv+0x843) [0x7f889d20cf33]
libQtGui.so.4(_ZN7QAction9triggeredEb+0x32)…
Arenim
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6
votes
1 answer
Transform backtrace to string during catch_unwind
I am writing a cross-platform (Linux/iOS/Android) library in Rust. In case my library panics I want the application to continue working as normal and not crash. In order to do that, I am using catch_unwind; its result contains panic information and…
Bashir Abdelwahed
- 474
- 4
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6
votes
2 answers
Getting the caller's Return Address
I am trying to figure out how to grab the return address of a caller in MSVC. I can use _ReturnAddress() to get the return address of my function, but I can't seem to find a way to get the caller's.
I've tried using CaptureStackBackTrace, but for…
Jana Schweizer
- 93
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- 6
6
votes
3 answers
How ro resolve cpp symbols from backtrace_symbols() in the offset during runtime for addr2line
To catch fatal errors like Segmentation Fault during runtime I write a custom SignalHandler that will print a stack trace to console and into a log file.
To achieve this I use (as hundreds before me) the backtrace() and backtrace_symbols() functions…
J.Panek
- 425
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6
votes
3 answers
backtrace by SIGSEGV
I'm debugging an application write in ansi C, a multiple threads program.
Sometime, in the main thread cause a SIGSEGV fault.
(gdb) backtrace full
#0 0x0000000000000000 in ?? ()
No symbol table info available.
#1 0x0000000000000000 in ?? ()
No…
secmask
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6
votes
5 answers
No more gdb in XCode console when build for iPhone simulator
Usually I use gdb backtrace to debug my application, but recently I can no longer do it when testing on iPhone simulator. The blue gdb word stops being displayed on console, and nothing happens when I type "bt" or "backtrace". I can still build and…
iamj4de
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6
votes
1 answer
Getting the current stack trace on Mac OS X
I'm trying to work out how to store and then print the current stack in my C++ apps on Mac OS X. The main problem seems to be getting dladdr to return the right symbol when given an address inside the main executable. I suspect that the issue is…
user33847
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6
votes
2 answers
0xfbad8001 Magic Number in backtrace
I am looking at the following backtrace of a program I am debugging in GDB:
Thread 7 (Thread 3983):
#0 0xf7737430 in __kernel_vsyscall ()
#1 0x41b85412 in __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S:142
#2 …
Digital Trauma
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6
votes
2 answers
Analyze backtrace of a crash occurring due to a faulty library
In my application I have setup signal handler to catch Segfaults, and print bactraces.
My application loads some plugins libraries, when process starts.
If my application crashes with a segfault, due to an error in the main executable binary, I can…
mdk
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5
votes
1 answer
How to show line numbers in D backtraces?
I have the following sample code in D:
import std.stdio;
int g(int i) {
auto l = [1, 2, 3, 4];
return l[i];
}
void f(int i) {
writeln(g(i));
}
void main(string[] args) {
f(1);
f(10);
f(2);
}
I compiled this code with DMD…
gyim
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5
votes
2 answers
Why does PHPUnit hide my xdebug backtrace?
I have PHPUnit and xdebug installed, and in my php.ini files for CLI I've got:
display_errors = On
xdebug.default_enable = 1
I've verified that an xdebug backtrace is printed when I create an error using the interactive console, but when an error…
Ian Phillips
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5
votes
2 answers
GDB cannot show the stack and shows "#1 0x0000000000000000 in ?? ()"
I have a multi-threaded C++ program that deadlocks in some rare cases. The problem is hard to reproduce and I can only reproduce it in a remote machine.
The method I want to use for solving this problem is
run the program
wait for deadlock
send…
Shayan Pooya
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5
votes
2 answers
what makes backtrace() crash(SIGSEGV ) on Linux 64 bit
I am developeing an application on linux where i wanted to have backtrace of all running threads at a particular frequency. so my user defined signal handler SIGUSR1 (for all threads) calls backtrace().
i am getting crash(SIGSEGV) in my signal…
sandeep
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