Hi,
Is it possible to print the function name of the calling function?
For example, f1() and f2() both calls f3(), in f3() I would like to
print the name of the function calling f3() which could either be f1()
or f2().
BRs!
15  22862 
In article <11************ **********@l53g 2000cwa.googleg roups.com>,
dspfun <ds****@hotmail .comwrote:
>Is it possible to print the function name of the calling function?
There is no facility for that in standard C.
>For example, f1() and f2() both calls f3(), in f3() I would like to
print the name of the function calling f3() which could either be f1()
or f2().
Some systems provide extensions to allow the calling stack to
be examined, but C doesn't require it, and it isn't necessarily
easy even on systems where it can be done.
--
Programming is what happens while you're busy making other plans.
dspfun wrote:
Hi,
Is it possible to print the function name of the calling function?
Not portably.
For example, f1() and f2() both calls f3(), in f3() I would like to
print the name of the function calling f3() which could either be f1()
or f2().
So the caller can't rely on f3() behaving consistently?
If you need more info than you pass in the function arguments, the
obvious suggestion is to simply add some more function arguments.
On 20 Feb, 08:32, "Harald van Dijk" <true...@gmail. comwrote:
dspfun wrote:
Hi,
Is it possible to print the function name of the calling function?
Not portably.
For example, f1() and f2() both calls f3(), in f3() I would like to
print the name of the function calling f3() which could either be f1()
or f2().
So the caller can't rely on f3() behaving consistently?
If you need more info than you pass in the function arguments, the
obvious suggestion is to simply add some more function arguments.
In gdb it is possible to get a call trace, how can gdb get the call
trace? Does gdb use some OS-specific functions for this?
Yes it is possible in gdb. Use the command "bt" to get a stack trace.
On Feb 20, 4:42 pm, "dspfun" <dsp...@hotmail .comwrote:
On 20 Feb, 08:32, "Harald van Dijk" <true...@gmail. comwrote:
dspfun wrote:
Hi,
Is it possible to print the function name of the calling function?
Not portably.
For example, f1() and f2() both calls f3(), in f3() I would like to
print the name of the function calling f3() which could either be f1()
or f2().
So the caller can't rely on f3() behaving consistently?
If you need more info than you pass in the function arguments, the
obvious suggestion is to simply add some more function arguments.
In gdb it is possible to get a call trace, how can gdb get the call
trace? Does gdb use some OS-specific functions for this?
dspfun wrote:
On 20 Feb, 08:32, "Harald van Dijk" <true...@gmail. comwrote:
dspfun wrote:
Hi,
Is it possible to print the function name of the calling function?
Not portably.
For example, f1() and f2() both calls f3(), in f3() I would like to
print the name of the function calling f3() which could either be f1()
or f2().
So the caller can't rely on f3() behaving consistently?
If you need more info than you pass in the function arguments, the
obvious suggestion is to simply add some more function arguments.
In gdb it is possible to get a call trace, how can gdb get the call
trace? Does gdb use some OS-specific functions for this?
gdb uses system-specific ways to get the function's addresses, but
loads the compiler-generated debug info (including the calling
function's name) from the executable. In your own code, you cannot
even assume that your own program can read itself, let alone rely on a
specific debugging format.
On 20 Feb, 08:51, "Harald van Dijk" <true...@gmail. comwrote:
dspfun wrote:
On 20 Feb, 08:32, "Harald van Dijk" <true...@gmail. comwrote:
dspfun wrote:
Hi,
Is it possible to print the function name of the calling function?
Not portably.
For example, f1() and f2() both calls f3(), in f3() I would like to
print the name of the function calling f3() which could either be f1()
or f2().
So the caller can't rely on f3() behaving consistently?
If you need more info than you pass in the function arguments, the
obvious suggestion is to simply add some more function arguments.
In gdb it is possible to get a call trace, how can gdb get the call
trace? Does gdb use some OS-specific functions for this?
gdb uses system-specific ways to get the function's addresses, but
loads the compiler-generated debug info (including the calling
function's name) from the executable. In your own code, you cannot
even assume that your own program can read itself, let alone rely on a
specific debugging format.- Dölj citerad text -
- Visa citerad text -
What is the reason that a program cannot read itself? Why can't the
program rely on the debugging format (except for portability reasons)?
dspfun wrote:
On 20 Feb, 08:51, "Harald van Dijk" <true...@gmail. comwrote:
dspfun wrote:
On 20 Feb, 08:32, "Harald van Dijk" <true...@gmail. comwrote:
dspfun wrote:
Hi,
Is it possible to print the function name of the calling function?
Not portably.
For example, f1() and f2() both calls f3(), in f3() I would like to
print the name of the function calling f3() which could either bef1()
or f2().
So the caller can't rely on f3() behaving consistently?
If you need more info than you pass in the function arguments, the
obvious suggestion is to simply add some more function arguments.
In gdb it is possible to get a call trace, how can gdb get the call
trace? Does gdb use some OS-specific functions for this?
gdb uses system-specific ways to get the function's addresses, but
loads the compiler-generated debug info (including the calling
function's name) from the executable. In your own code, you cannot
even assume that your own program can read itself, let alone rely on a
specific debugging format.
What is the reason that a program cannot read itself?
Many reasons, but for a simple one, on a Unix-like system, try chmod a-
r executable. You (and thus the program) won't be able to read it, but
you can still run it.
Why can't the
program rely on the debugging format (except for portability reasons)?
Well, if you don't count the reasons that a program cannot rely on a
specific debug format, then there are no reasons. :) Seriously, the
debugging format is not even sure to remain the same with different
versions of the same compiler for the same system.
dspfun wrote:
Hi,
Is it possible to print the function name of the calling function?
For example, f1() and f2() both calls f3(), in f3() I would like to
print the name of the function calling f3() which could either be f1()
or f2().
If you want functions to know the names of their callers, pass it as an
argument.
On Feb 20, 8:26 am, "dspfun" <dsp...@hotmail .comwrote:
Hi,
Is it possible to print the function name of the calling function?
For example, f1() and f2() both calls f3(), in f3() I would like to
print the name of the function calling f3() which could either be f1()
or f2().
If I remember correctly, a C99 implementation should implement the
__func__ identifier. It's implicitly declared and equals to
static const char __func__[] = "function-name";
--
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