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-rw-r--r--libs/binderdebug/BinderDebug.cpp166
1 files changed, 96 insertions, 70 deletions
diff --git a/libs/binderdebug/BinderDebug.cpp b/libs/binderdebug/BinderDebug.cpp
index d086b49a7b..a8f2cbfb5b 100644
--- a/libs/binderdebug/BinderDebug.cpp
+++ b/libs/binderdebug/BinderDebug.cpp
@@ -48,14 +48,12 @@ static status_t scanBinderContext(pid_t pid, const std::string& contextName,
return -errno;
}
}
- static const std::regex kContextLine("^context (\\w+)$");
bool isDesiredContext = false;
std::string line;
- std::smatch match;
while (getline(ifs, line)) {
- if (std::regex_search(line, match, kContextLine)) {
- isDesiredContext = match.str(1) == contextName;
+ if (base::StartsWith(line, "context")) {
+ isDesiredContext = base::Split(line, " ").back() == contextName;
continue;
}
if (!isDesiredContext) {
@@ -66,57 +64,72 @@ static status_t scanBinderContext(pid_t pid, const std::string& contextName,
return OK;
}
+// Examples of what we are looking at:
+// node 66730: u00007590061890e0 c0000759036130950 pri 0:120 hs 1 hw 1 ls 0 lw 0 is 2 iw 2 tr 1 proc 2300 1790
+// thread 2999: l 00 need_return 1 tr 0
status_t getBinderPidInfo(BinderDebugContext context, pid_t pid, BinderPidInfo* pidInfo) {
std::smatch match;
static const std::regex kReferencePrefix("^\\s*node \\d+:\\s+u([0-9a-f]+)\\s+c([0-9a-f]+)\\s+");
static const std::regex kThreadPrefix("^\\s*thread \\d+:\\s+l\\s+(\\d)(\\d)");
std::string contextStr = contextToString(context);
status_t ret = scanBinderContext(pid, contextStr, [&](const std::string& line) {
- if (std::regex_search(line, match, kReferencePrefix)) {
- const std::string& ptrString = "0x" + match.str(2); // use number after c
- uint64_t ptr;
- if (!::android::base::ParseUint(ptrString.c_str(), &ptr)) {
- // Should not reach here, but just be tolerant.
- return;
- }
- const std::string proc = " proc ";
- auto pos = line.rfind(proc);
- if (pos != std::string::npos) {
- for (const std::string& pidStr : base::Split(line.substr(pos + proc.size()), " ")) {
- int32_t pid;
- if (!::android::base::ParseInt(pidStr, &pid)) {
+ if (base::StartsWith(line, " node")) {
+ std::vector<std::string> splitString = base::Tokenize(line, " ");
+ bool pids = false;
+ uint64_t ptr = 0;
+ for (const auto& token : splitString) {
+ if (base::StartsWith(token, "u")) {
+ const std::string ptrString = "0x" + token.substr(1);
+ if (!::android::base::ParseUint(ptrString.c_str(), &ptr)) {
+ LOG(ERROR) << "Failed to parse pointer: " << ptrString;
return;
}
- pidInfo->refPids[ptr].push_back(pid);
+ } else {
+ // The last numbers in the line after "proc" are all client PIDs
+ if (token == "proc") {
+ pids = true;
+ } else if (pids) {
+ int32_t pid;
+ if (!::android::base::ParseInt(token, &pid)) {
+ LOG(ERROR) << "Failed to parse pid int: " << token;
+ return;
+ }
+ if (ptr == 0) {
+ LOG(ERROR) << "We failed to parse the pointer, so we can't add the refPids";
+ return;
+ }
+ pidInfo->refPids[ptr].push_back(pid);
+ }
}
}
+ } else if (base::StartsWith(line, " thread")) {
+ auto pos = line.find("l ");
+ if (pos != std::string::npos) {
+ // "1" is waiting in binder driver
+ // "2" is poll. It's impossible to tell if these are in use.
+ // and HIDL default code doesn't use it.
+ bool isInUse = line.at(pos + 2) != '1';
+ // "0" is a thread that has called into binder
+ // "1" is looper thread
+ // "2" is main looper thread
+ bool isBinderThread = line.at(pos + 3) != '0';
+ if (!isBinderThread) {
+ return;
+ }
+ if (isInUse) {
+ pidInfo->threadUsage++;
+ }
- return;
- }
- if (std::regex_search(line, match, kThreadPrefix)) {
- // "1" is waiting in binder driver
- // "2" is poll. It's impossible to tell if these are in use.
- // and HIDL default code doesn't use it.
- bool isInUse = match.str(1) != "1";
- // "0" is a thread that has called into binder
- // "1" is looper thread
- // "2" is main looper thread
- bool isBinderThread = match.str(2) != "0";
- if (!isBinderThread) {
- return;
- }
- if (isInUse) {
- pidInfo->threadUsage++;
+ pidInfo->threadCount++;
}
-
- pidInfo->threadCount++;
- return;
}
- return;
});
return ret;
}
+// Examples of what we are looking at:
+// ref 52493: desc 910 node 52492 s 1 w 1 d 0000000000000000
+// node 29413: u00007803fc982e80 c000078042c982210 pri 0:139 hs 1 hw 1 ls 0 lw 0 is 2 iw 2 tr 1 proc 488 683
status_t getBinderClientPids(BinderDebugContext context, pid_t pid, pid_t servicePid,
int32_t handle, std::vector<pid_t>* pids) {
std::smatch match;
@@ -124,51 +137,64 @@ status_t getBinderClientPids(BinderDebugContext context, pid_t pid, pid_t servic
std::string contextStr = contextToString(context);
int32_t node;
status_t ret = scanBinderContext(pid, contextStr, [&](const std::string& line) {
- if (std::regex_search(line, match, kNodeNumber)) {
- const std::string& descString = match.str(1);
- int32_t desc;
- if (!::android::base::ParseInt(descString.c_str(), &desc)) {
- LOG(ERROR) << "Failed to parse desc int: " << descString;
- return;
- }
- if (handle != desc) {
- return;
- }
- const std::string& nodeString = match.str(2);
- if (!::android::base::ParseInt(nodeString.c_str(), &node)) {
- LOG(ERROR) << "Failed to parse node int: " << nodeString;
- return;
- }
+ if (!base::StartsWith(line, " ref")) return;
+
+ std::vector<std::string> splitString = base::Tokenize(line, " ");
+ if (splitString.size() < 12) {
+ LOG(ERROR) << "Failed to parse binder_logs ref entry. Expecting size greater than 11, but got: " << splitString.size();
+ return;
+ }
+ int32_t desc;
+ if (!::android::base::ParseInt(splitString[3].c_str(), &desc)) {
+ LOG(ERROR) << "Failed to parse desc int: " << splitString[3];
+ return;
+ }
+ if (handle != desc) {
+ return;
+ }
+ if (!::android::base::ParseInt(splitString[5].c_str(), &node)) {
+ LOG(ERROR) << "Failed to parse node int: " << splitString[5];
return;
}
- return;
+ LOG(INFO) << "Parsed the node: " << node;
});
if (ret != OK) {
return ret;
}
- static const std::regex kClients("^\\s+node\\s+(\\d+).*proc\\s+([\\d+\\s*]*)");
+
ret = scanBinderContext(servicePid, contextStr, [&](const std::string& line) {
- if (std::regex_search(line, match, kClients)) {
- const std::string nodeString = match.str(1);
- int32_t matchedNode;
- if (!::android::base::ParseInt(nodeString.c_str(), &matchedNode)) {
- LOG(ERROR) << "Failed to parse node int: " << nodeString;
- return;
- }
- if (node != matchedNode) {
- return;
- }
- const std::string clients = match.str(2);
- for (const std::string& pidStr : base::Split(clients, " ")) {
+ if (!base::StartsWith(line, " node")) return;
+
+ std::vector<std::string> splitString = base::Tokenize(line, " ");
+ if (splitString.size() < 21) {
+ LOG(ERROR) << "Failed to parse binder_logs node entry. Expecting size greater than 20, but got: " << splitString.size();
+ return;
+ }
+
+ // remove the colon
+ const std::string nodeString = splitString[1].substr(0, splitString[1].size() - 1);
+ int32_t matchedNode;
+ if (!::android::base::ParseInt(nodeString.c_str(), &matchedNode)) {
+ LOG(ERROR) << "Failed to parse node int: " << nodeString;
+ return;
+ }
+
+ if (node != matchedNode) {
+ return;
+ }
+ bool pidsSection = false;
+ for (const auto& token : splitString) {
+ if (token == "proc") {
+ pidsSection = true;
+ } else if (pidsSection == true) {
int32_t pid;
- if (!::android::base::ParseInt(pidStr, &pid)) {
+ if (!::android::base::ParseInt(token.c_str(), &pid)) {
+ LOG(ERROR) << "Failed to parse PID int: " << token;
return;
}
pids->push_back(pid);
}
- return;
}
- return;
});
return ret;
}
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-10-21 00:03:27 +0000