[ECOS] gdb and C++ constructors

["Philip Keller" <keller at metrolab dot ch>]

Hello,
?
I am unable to set breakpoints in, or trace through, C++ constructors. I am
wondering if this problem manifests itself on other platforms, and if anyone
has any suggestions on how to fix it or track it down.
?
A sample program is attached. The comment lines show how I build it, for
Cygwin as well as eCos.
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I set breakpoints at the two printf statements, but gdb does not stop at the
one in the constructor (the printf happens, though). Tracing into the ?new?
does just that: I see the ?operator new?, then onward into malloc, which
eventually calls ?::unlock_inner and ?::call_pending_DSRs, never to be heard
from again. Setting a watch point on gFlag also causes gdb to disappear into
never-never land.
?
Needless to say, everything works as expected under Cygwin.
?
We are using a custom platform with a Samsung S3C2410X (ARM9 core)
processor. We?re using eCos 2.0.x, where ?x? = CVS ?current? as of
25.03.2004. We use RedBoot as monitor, and RedBoot includes GDB stubs. Our
monitor interface is TCP/IP. We normally use MacGraigor?s arm-elf-gdb --
actually insight = windowed version of gdb -- but the result is the same
with the gdb in ecoscentric-gnutools-arm-elf-1.4-2.cygwin.tar.bz2. 
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Any suggestions would be VERY welcome ;-)?? 8-/?? =8-O
-- Philip
Keller??????????????????????????????????????????????????????????????????????
????????????????????????????????????????????????????????????????????????????
????????? 
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8<-------------
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// gcc -g -O0 -o test.exe test.cpp -lsupc++ -lstdc++
// arm-elf-gcc -g -O0 -mcpu=arm9 -o test
-I/opt/ecos/libPT2026/libPT2026_install/include -nostartfiles -nostdlib
-L/opt/ecos/libPT2026/libPT2026_install/lib -Ttarget.ld test.cpp
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#include <stdio.h>
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static int gFlag = 0;
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class test
{
??????????? public :
??????????????????????? test (void);
??????????????????????? void output (char * string);
};
?
int main (void)
{
??????????? test * pTest = new test;
??????????? pTest->output ("Hello world!\n");
??????????? delete pTest;
??????????? return 0;
}
?
test::test (void)
{
??????????? gFlag = 1;
??????????? printf ("Creating new instance of test object.\n");
}
?
void test::output (char * string)
{
??????????? gFlag = 2;
??????????? printf (string);
}
?



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