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Add a /proc/kmalloc stats file.

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This commit is contained in:
Andreas Kling 2018-10-26 18:28:25 +02:00
parent edb81a635c
commit a447359916
1 changed files with 13 additions and 6 deletions
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19
Kernel/ProcFileSystem.cpp
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@ -64,13 +64,20 @@ bool ProcFileSystem::initialize()
{ {
SyntheticFileSystem::initialize(); SyntheticFileSystem::initialize();
addFile(createGeneratedFile("kmalloc", [] {
InterruptDisabler disabler;
auto buffer = ByteBuffer::createUninitialized(128);
char* ptr = (char*)buffer.pointer();
ptr += ksprintf(ptr, "alloc: %u\nfree: %u\n", sum_alloc, sum_free);
buffer.trim(ptr - (char*)buffer.pointer());
return buffer;
}));
addFile(createGeneratedFile("summary", [] { addFile(createGeneratedFile("summary", [] {
InterruptDisabler disabler; InterruptDisabler disabler;
auto tasks = Task::allTasks(); auto tasks = Task::allTasks();
char* buffer; auto buffer = ByteBuffer::createUninitialized(tasks.size() * 256);
auto stringImpl = StringImpl::createUninitialized(tasks.size() * 256, buffer); char* ptr = (char*)buffer.pointer();
memset(buffer, 0, stringImpl->length());
char* ptr = buffer;
ptr += ksprintf(ptr, "PID OWNER STATE PPID NSCHED FDS NAME\n"); ptr += ksprintf(ptr, "PID OWNER STATE PPID NSCHED FDS NAME\n");
for (auto* task : tasks) { for (auto* task : tasks) {
ptr += ksprintf(ptr, "%w %w:%w %b %w %x %w %s\n", ptr += ksprintf(ptr, "%w %w:%w %b %w %x %w %s\n",
@ -83,9 +90,9 @@ bool ProcFileSystem::initialize()
task->fileHandleCount(), task->fileHandleCount(),
task->name().characters()); task->name().characters());
} }
ptr += ksprintf(ptr, "kmalloc: alloc: %u / free: %u\n", sum_alloc, sum_free);
*ptr = '\0'; *ptr = '\0';
return ByteBuffer::copy((byte*)buffer, ptr - buffer); buffer.trim(ptr - (char*)buffer.pointer());
return buffer;
})); }));
return true; return true;
} }