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Merge "llkd: report stack signature matched"

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Treehugger Robot 2019-01-04 21:54:53 +00:00 committed by Gerrit Code Review
commit 3cd02e8908
1 changed files with 7 additions and 3 deletions
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10
llkd/libllkd.cpp
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@ -737,19 +737,21 @@ bool llkCheckStack(proc* procp, const std::string& piddir) {
auto kernel_stack = ReadFile(piddir + "/stack");
if (kernel_stack.empty()) {
LOG(INFO) << piddir << "/stack empty comm=" << procp->getComm()
<< " cmdline=" << procp->getCmdline();
LOG(VERBOSE) << piddir << "/stack empty comm=" << procp->getComm()
<< " cmdline=" << procp->getCmdline();
return false;
}
// A scheduling incident that should not reset count_stack
if (kernel_stack.find(" cpu_worker_pools+0x") != std::string::npos) return false;
char idx = -1;
char match = -1;
std::string matched_stack_symbol = "<unknown>";
for (const auto& stack : llkCheckStackSymbols) {
if (++idx < 0) break;
if ((kernel_stack.find(" "s + stack + "+0x") != std::string::npos) ||
(kernel_stack.find(" "s + stack + ".cfi+0x") != std::string::npos)) {
match = idx;
matched_stack_symbol = stack;
break;
}
}
@ -760,7 +762,9 @@ bool llkCheckStack(proc* procp, const std::string& piddir) {
}
if (match == char(-1)) return false;
procp->count_stack += llkCycle;
return procp->count_stack >= llkStateTimeoutMs[llkStateStack];
if (procp->count_stack < llkStateTimeoutMs[llkStateStack]) return false;
LOG(WARNING) << "Found " << matched_stack_symbol << " in stack for pid " << procp->pid;
return true;
}
#endif