Hi All,
I like to understand better the following reports. I have a buffer that
I allocated and that gets filled by MPI recv. However, for every access
to the buffer valgrind produce a report similar to the following first
report shown here:
Invalid read of size 4
Address 0x1788a6d0 is 0 bytes inside a block of size 30,121 alloc'd
in subsequent reports "0 bytes inside" the 0 is replaced with the offset
of the access in the buffer. Full output of the first few reports are
shown below.
what I don't understand about these reports are, if I am accessing
memory inside the buffer I allocated how that is a problem?? I spent
some time looking for problems in my code, and verifying that the recv'd
data is accurate. Finally I tried MPI from a different vendor and the
reports are gone!
Thanks for an insight into this!
Burlen
==23010== Invalid read of size 4
==23010== at 0x60683FA: void teca_binary_stream::unpack<unsigned
int>(unsigned int&) (teca_binary_stream.h:108)
==23010== by 0x6433AD9:
teca_metadata::from_stream(teca_binary_stream&) (teca_metadata.cxx:207)
==23010== by 0x5D560BF: teca_cf_reader::get_output_metadata(unsigned
int, std::vector<teca_metadata, std::allocator<teca_metadata> > const&)
(teca_cf_reader.cxx:736)
==23010== by 0x64266C4:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:579)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x6426F5A: teca_algorithm::update(unsigned int)
(teca_algorithm.cxx:684)
==23010== by 0x642725D: teca_algorithm::update() (teca_algorithm.cxx:708)
==23010== by 0x4415FA: main (test_descriptive_statistics.cpp:100)
==23010== Address 0x1788a6d0 is 0 bytes inside a block of size 30,121
alloc'd
==23010== at 0x4C28C50: malloc (vg_replace_malloc.c:298)
==23010== by 0x4C2AC1C: realloc (vg_replace_malloc.c:785)
==23010== by 0x643276B: teca_binary_stream::resize(unsigned long)
(teca_binary_stream.cxx:87)
==23010== by 0x5D55F3C: teca_cf_reader::get_output_metadata(unsigned
int, std::vector<teca_metadata, std::allocator<teca_metadata> > const&)
(teca_cf_reader.cxx:725)
==23010== by 0x64266C4:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:579)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x6426F5A: teca_algorithm::update(unsigned int)
(teca_algorithm.cxx:684)
==23010== by 0x642725D: teca_algorithm::update() (teca_algorithm.cxx:708)
==23010== by 0x4415FA: main (test_descriptive_statistics.cpp:100)
==23010==
unpacking 9
==23010== Invalid read of size 8
==23010== at 0x44AB7C: void teca_binary_stream::unpack<unsigned
long>(unsigned long&) (teca_binary_stream.h:108)
==23010== by 0x44A62A:
teca_binary_stream::unpack(std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >&) (teca_binary_stream.h:147)
==23010== by 0x6433B43:
teca_metadata::from_stream(teca_binary_stream&) (teca_metadata.cxx:214)
==23010== by 0x5D560BF: teca_cf_reader::get_output_metadata(unsigned
int, std::vector<teca_metadata, std::allocator<teca_metadata> > const&)
(teca_cf_reader.cxx:736)
==23010== by 0x64266C4:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:579)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x6426F5A: teca_algorithm::update(unsigned int)
(teca_algorithm.cxx:684)
==23010== by 0x642725D: teca_algorithm::update() (teca_algorithm.cxx:708)
==23010== by 0x4415FA: main (test_descriptive_statistics.cpp:100)
==23010== Address 0x1788a6d4 is 4 bytes inside a block of size 30,121
alloc'd
==23010== at 0x4C28C50: malloc (vg_replace_malloc.c:298)
==23010== by 0x4C2AC1C: realloc (vg_replace_malloc.c:785)
==23010== by 0x643276B: teca_binary_stream::resize(unsigned long)
(teca_binary_stream.cxx:87)
==23010== by 0x5D55F3C: teca_cf_reader::get_output_metadata(unsigned
int, std::vector<teca_metadata, std::allocator<teca_metadata> > const&)
(teca_cf_reader.cxx:725)
==23010== by 0x64266C4:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:579)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x6426F5A: teca_algorithm::update(unsigned int)
(teca_algorithm.cxx:684)
==23010== by 0x642725D: teca_algorithm::update() (teca_algorithm.cxx:708)
==23010== by 0x4415FA: main (test_descriptive_statistics.cpp:100)
==23010==
==23010== Invalid read of size 2
==23010== at 0x4C2D3E0: memcpy@@GLIBC_2.14 (vg_replace_strmem.c:1018)
==23010== by 0x9E5F2DC: std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >::_M_replace(unsigned
long, unsigned long, char const*, unsigned long) (in
/usr/lib64/libstdc++.so.6.0.21)
==23010== by 0x44A658:
teca_binary_stream::unpack(std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >&) (teca_binary_stream.h:150)
==23010== by 0x6433B43:
teca_metadata::from_stream(teca_binary_stream&) (teca_metadata.cxx:214)
==23010== by 0x5D560BF: teca_cf_reader::get_output_metadata(unsigned
int, std::vector<teca_metadata, std::allocator<teca_metadata> > const&)
(teca_cf_reader.cxx:736)
==23010== by 0x64266C4:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:579)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x6426F5A: teca_algorithm::update(unsigned int)
(teca_algorithm.cxx:684)
==23010== by 0x642725D: teca_algorithm::update() (teca_algorithm.cxx:708)
==23010== Address 0x1788a6dc is 12 bytes inside a block of size 30,121
alloc'd
==23010== at 0x4C28C50: malloc (vg_replace_malloc.c:298)
==23010== by 0x4C2AC1C: realloc (vg_replace_malloc.c:785)
==23010== by 0x643276B: teca_binary_stream::resize(unsigned long)
(teca_binary_stream.cxx:87)
==23010== by 0x5D55F3C: teca_cf_reader::get_output_metadata(unsigned
int, std::vector<teca_metadata, std::allocator<teca_metadata> > const&)
(teca_cf_reader.cxx:725)
==23010== by 0x64266C4:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:579)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x6426F5A: teca_algorithm::update(unsigned int)
(teca_algorithm.cxx:684)
==23010== by 0x642725D: teca_algorithm::update() (teca_algorithm.cxx:708)
==23010== by 0x4415FA: main (test_descriptive_statistics.cpp:100)
==23010==
==23010== Invalid read of size 2
==23010== at 0x4C2D3EE: memcpy@@GLIBC_2.14 (vg_replace_strmem.c:1018)
==23010== by 0x9E5F2DC: std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >::_M_replace(unsigned
long, unsigned long, char const*, unsigned long) (in
/usr/lib64/libstdc++.so.6.0.21)
==23010== by 0x44A658:
teca_binary_stream::unpack(std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >&) (teca_binary_stream.h:150)
==23010== by 0x6433B43:
teca_metadata::from_stream(teca_binary_stream&) (teca_metadata.cxx:214)
==23010== by 0x5D560BF: teca_cf_reader::get_output_metadata(unsigned
int, std::vector<teca_metadata, std::allocator<teca_metadata> > const&)
(teca_cf_reader.cxx:736)
==23010== by 0x64266C4:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:579)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x6426F5A: teca_algorithm::update(unsigned int)
(teca_algorithm.cxx:684)
==23010== by 0x642725D: teca_algorithm::update() (teca_algorithm.cxx:708)
==23010== Address 0x1788a6e0 is 16 bytes inside a block of size 30,121
alloc'd
==23010== at 0x4C28C50: malloc (vg_replace_malloc.c:298)
==23010== by 0x4C2AC1C: realloc (vg_replace_malloc.c:785)
==23010== by 0x643276B: teca_binary_stream::resize(unsigned long)
(teca_binary_stream.cxx:87)
==23010== by 0x5D55F3C: teca_cf_reader::get_output_metadata(unsigned
int, std::vector<teca_metadata, std::allocator<teca_metadata> > const&)
(teca_cf_reader.cxx:725)
==23010== by 0x64266C4:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:579)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x6426F5A: teca_algorithm::update(unsigned int)
(teca_algorithm.cxx:684)
==23010== by 0x642725D: teca_algorithm::update() (teca_algorithm.cxx:708)
==23010== by 0x4415FA: main (test_descriptive_statistics.cpp:100)
==23010==
==23010== Invalid read of size 4
==23010== at 0x60683FA: void teca_binary_stream::unpack<unsigned
int>(unsigned int&) (teca_binary_stream.h:108)
==23010== by 0x6433B56:
teca_metadata::from_stream(teca_binary_stream&) (teca_metadata.cxx:217)
==23010== by 0x5D560BF: teca_cf_reader::get_output_metadata(unsigned
int, std::vector<teca_metadata, std::allocator<teca_metadata> > const&)
(teca_cf_reader.cxx:736)
==23010== by 0x64266C4:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:579)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x6426F5A: teca_algorithm::update(unsigned int)
(teca_algorithm.cxx:684)
==23010== by 0x642725D: teca_algorithm::update() (teca_algorithm.cxx:708)
==23010== by 0x4415FA: main (test_descriptive_statistics.cpp:100)
==23010== Address 0x1788a6e6 is 22 bytes inside a block of size 30,121
alloc'd
==23010== at 0x4C28C50: malloc (vg_replace_malloc.c:298)
==23010== by 0x4C2AC1C: realloc (vg_replace_malloc.c:785)
==23010== by 0x643276B: teca_binary_stream::resize(unsigned long)
(teca_binary_stream.cxx:87)
==23010== by 0x5D55F3C: teca_cf_reader::get_output_metadata(unsigned
int, std::vector<teca_metadata, std::allocator<teca_metadata> > const&)
(teca_cf_reader.cxx:725)
==23010== by 0x64266C4:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:579)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x642665B:
teca_algorithm::get_output_metadata(std::pair<std::shared_ptr<teca_algorithm>,
unsigned int>&) (teca_algorithm.cxx:573)
==23010== by 0x6426F5A: teca_algorithm::update(unsigned int)
(teca_algorithm.cxx:684)
==23010== by 0x642725D: teca_algorithm::update() (teca_algorithm.cxx:708)
==23010== by 0x4415FA: main (test_descriptive_statistics.cpp:100)
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