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crimson/common: dump /proc/self/maps on crash.

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Signed-off-by: Radoslaw Zarzynski <rzarzyns@redhat.com>
This commit is contained in:
Radoslaw Zarzynski 2021-06-22 14:15:40 +00:00
parent a5fd875665
commit 231a5e7e5c
1 changed files with 30 additions and 0 deletions
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30
src/crimson/common/fatal_signal.cc
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@ -11,6 +11,9 @@
#include <boost/stacktrace.hpp>
#include <seastar/core/reactor.hh>
#include "common/safe_io.h"
#include "include/scope_guard.h"
FatalSignal::FatalSignal()
{
install_oneshot_signals_handler<SIGSEGV,
@ -68,6 +71,32 @@ static void print_segv_info(const siginfo_t* siginfo)
std::cerr << std::flush;
}
static void print_proc_maps()
{
const int fd = ::open("/proc/self/maps", O_RDONLY);
if (fd < 0) {
std::cerr << "can't open /proc/self/maps. procfs not mounted?" << std::endl;
return;
}
const auto fd_guard = make_scope_guard([fd] {
::close(fd);
});
std::cerr << "Content of /proc/self/maps:" << std::endl;
while (true) {
char chunk[4096] = {0, };
const ssize_t r = safe_read(fd, chunk, sizeof(chunk) - 1);
if (r < 0) {
std::cerr << "error while reading /proc/self/maps: " << r << std::endl;
return;
} else {
std::cerr << chunk << std::flush;
if (r < static_cast<ssize_t>(sizeof(chunk) - 1)) {
return; // eof
}
}
}
}
void FatalSignal::signaled(const int signum, const siginfo_t* siginfo)
{
switch (signum) {
@ -82,4 +111,5 @@ void FatalSignal::signaled(const int signum, const siginfo_t* siginfo)
print_backtrace(fmt::format("Signal {}", signum));
break;
}
print_proc_maps();
}