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From: "Andrew Wall" <wallguide-usenet AT yahoo DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Trouble with gpp/gcov
Date: Sun, 1 Aug 2004 20:21:47 +0100
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Message-ID: <2n4u6bFsmhvrU1@uni-berlin.de>
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Thanks for the answer.
I was hoping that I hadn't been running gcc/gcov properly.
I had imagined that the compiler flags added code that would write a token
to the output file for every line that the compiler could identify as it is
run, but I'll report this to GCC.

Andrew -Wall

"Hans-Bernhard Broeker" <broeker AT physik DOT rwth-aachen DOT de> wrote in message
news:2n2bt7FsocrnU3 AT uni-berlin DOT de...
| Andrew Wall <wallguide-usenet AT yahoo DOT com> wrote:
|
| > I'm trying to use gcov to show the coverage my unit tests manage on my
| > software.
|
| A good idea.  Far too seldom is this exercise actually attempted.
|
| > I can get make/gpp to compile and link and the executables run OK, but
gcov
| > doesn't always report the correct coverage.
|
| There may be no way it can do that.  The key to your problem is that
| the calls to static constructors and destructors aren't done by any C
| or C++ code compiled as part of your project.  They're actually made
| by low-level code in the runtime system (libgcc, *crt*.o), and
| organized by some linker script magic (the ctor and dtor sections).
| Which means there will be no, or at least no usable profiling
| information present for their invocations.
|
| This problem is almost certainly located in GCC itself, not in its
| DJGPP port, so it should be reported to the GCC people.
|
| -- 
| Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de)
| Even if all the snow were burnt, ashes would remain.