backtrace_symbols_fd - Linux
Overview
backtrace_symbols_fd
is a Linux utility that prints backtraces of a process, reading backtrace data from a file descriptor. It is commonly used for debugging purposes, allowing developers to see a detailed stack trace for a given process.
Syntax
backtrace_symbols_fd [-s | -f] [-r] [-d] [-p] <file descriptor>
Options/Flags
- -s: Print symbol names instead of hexadecimal addresses.
- -f: Print frame pointers instead of return addresses.
- -r: Parse register values and print them as a separate line.
- -d: Print a disassembly of each code location.
- -p: Print a disassembly of the place at the tip of the stack.
Examples
Print a backtrace with symbol names:
backtrace_symbols_fd -s /proc/self/fd/10
Print a disassembly of the stack tip:
backtrace_symbols_fd -p /proc/self/fd/10
Common Issues
- Error: "Failed to read backtrace data": Ensure that the specified file descriptor is valid and that it contains valid backtrace data.
- Missing symbol names: If symbol names are not printed, make sure that the debug symbols are available for the process.
Integration
backtrace_symbols_fd
can be integrated with other tools for further analysis:
- gdb: Use
target remote /dev/fd/10
to attach gdb to a process and get a backtrace. - Perf: Use
perf record -g
to record a performance trace and then usebacktrace_symbols_fd
to print a backtrace for specific events.
Related Commands
backtrace
gdb
perf