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Questions tagged [backtrace]

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.

417 questions
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How can I show lambda functions on backtraces?

I'm writing a C++11 software and I'm using lambdas. When I print the backtrace with backtrace_symbols_fd all functions are demangled except of lambda. It's a bit obvious because they are anonymous functions, but there is a way to get more insight…
Luca Marturana
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How to extract debugging information from a crash

If my C++ app crashes on Windows I want to send useful debugging information to our server. On Linux I would use the GNU backtrace() function - is there an equivalent for Windows? Is there a way to extract useful debugging information after a…
hoju
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Retrieving backtrace from a panic in hook in Rust?

My application needs to send logs to fluentd as JSON format through stdout. While I'm trying to handle panics and arrange a &std::panic::PanicInfo as a JSON with std::panic::set_hook, I could not find a way to retrieve backtrace from a &PanicInfo. …
KUNIMI Taiyoh
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Is shoulda destroying my backtraces?

I have a test more or less like this: class FormDefinitionTest < ActiveSupport::TestCase context "a form_definition" do setup do @definition = SeedData.form_definition # ... I've purposely added a raise "blah" somewhere down the…
Pablo Fernandez
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Rails backtrace silencers do not work, while filters do

Fresh Rails 4.2 set up. I want to suppress long error backtraces. In the following backtrace log first line would be enough for me, and next 4 could be removed ActionController::RoutingError (No route matches [GET] "/user"): actionpack (4.2.1)…
Elder
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backtrace_symbols() with both -static and -rdynamic

Looking at this question and this question I can see that for backtrace_symbols() to work, one must compile with the -rdynamic flag. I've tried it into a test program and it works, but I'm writing a program that is also compiled with -static and…
Avio
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stacktrace and functions in namespaces

I am trying to get a backtrace at some point of the execution of my (c++) program. for that I am using backtrace and backtrace_symbols. Something along this lines: std::string stacktrace( unsigned int frames_to_skip ) { std::string str; …
foke
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gdb weird backtrace

My program is statically compiled with dietlibc. It is compiled on ubuntu x64 (compiled for x86 using the -m32 flag) and is run on a centos x86. The compiled size is only about 100KB. I compile it with -ggdb3 and no optimization flags. My program…
Paul Dugan
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How to trace a deadlock in Ruby

I use BrB to share a datasource for various worker processes in Ruby 1.9 that I fork with Process#fork: Thread.abort_on_exception = true fork do puts "Initializing data source process... (PID: #{Process.pid})" data = DataSource.new(files) …
Patrick Glandien
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Any porting available of backtrace for uclibc?

We are running the uclibc linux on ARM 9. The problem is uclibc doesn't support backtrace. When a core dump happens, I cannot grab the call stack. Does anyone have a good solution for that? For example, an existing porting of backtrace for uclibc,…
user303967
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Visual C# backtrace: how to know where [external code] resides?

I am using visual c# to debug a large c# project. The project is very large and only some of the pdbs are build by myself. I can build all the pdb however it's very time consuming. I am debugging a backtrace but a part of the trace is marked with…
Bin Chen
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What causes failure to unwind in a DWARF perf call stack?

In backtraces produced by perf record --call-graph dwarf and printed by perf script, I am consistently getting wrong addresses for maybe 5% of call stacks, i.e. unwinding fails. One example is my_bin 770395 705462.825887: 3560360 cycles: …
nnnmmm
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GDB: Question about relative and absolute paths to files in backtraces

I have question about gdb or gcc (but not firefox). I see only absolute paths in gdb when i debugging firefox. Example: 5 0x01bb0c52 in nsAppShell::ProcessNextNativeEvent (this=0xb7232ba0, mayWait=1) at …
uintptr_t
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What is RUST_BACKTRACE supposed to tell me?

My program is panicking so I followed its advice to run RUST_BACKTRACE=1 and I get this (just a little snippet). 1: 0x800c05b5 - std::sys::imp::backtrace::tracing::imp::write::hf33ae72d0baa11ed at…
boss revs
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Different offset in libc's backtrace_symbols() and libunwind's unw_get_proc_name()

I make a stack trace at some point in my program. Once with libc's backtrace_symbols() function and once with unw_get_proc_name() from libunwind. backtrace_symbols() output: /home/jj/test/mylib.so(+0x97004)[0x7f6b47ce9004] unw_get_proc_name()…
tur1ng
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