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Add a very hackish /proc/PID/stack.

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It walks the stack and identifies anything that looks like a kernel symbol.
This could be a lot more sophisticated.
This commit is contained in:
Andreas Kling 2018-10-26 22:32:35 +02:00
parent 81627cf7d5
commit c928b06218
14 changed files with 130 additions and 13 deletions
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36
Kernel/ProcFileSystem.cpp
View file

@ -1,6 +1,7 @@
#include "ProcFileSystem.h"
#include "Task.h"
#include <VirtualFileSystem/VirtualFileSystem.h>
#include "system.h"
static ProcFileSystem* s_the;
@ -48,6 +49,41 @@ void ProcFileSystem::addProcess(Task& task)
*ptr = '\0';
return ByteBuffer::copy((byte*)buffer, ptr - buffer);
}), dir.index());
addFile(createGeneratedFile("stack", [&task] {
InterruptDisabler disabler;
auto& syms = ksyms();
dword firstKsymAddress = syms.first().address;
dword lastKsymAddress = syms.last().address;
struct RecognizedSymbol {
dword address;
const char* name;
dword offset;
};
Vector<RecognizedSymbol> recognizedSymbols;
size_t bytesNeeded = 0;
for (dword* stackPtr = (dword*)task.stackPtr(); (dword)stackPtr < task.stackTop(); ++stackPtr) {
if (*stackPtr < firstKsymAddress || *stackPtr > lastKsymAddress)
continue;
const char* name = nullptr;
unsigned offset = 0;
for (unsigned i = 0; i < syms.size(); ++i) {
if (*stackPtr < syms[i+1].address) {
name = syms[i].name.characters();
offset = *stackPtr - syms[i].address;
bytesNeeded += syms[i].name.length() + 8 + 16;
break;
}
}
recognizedSymbols.append({ *stackPtr, name, offset });
}
auto buffer = ByteBuffer::createUninitialized(bytesNeeded);
char* ptr = (char*)buffer.pointer();
for (auto& symbol : recognizedSymbols) {
kprintf("%p %s +%u\n", symbol.address, symbol.name, symbol.offset);
}
buffer.trim(ptr - (char*)buffer.pointer());
return buffer;
}), dir.index());
}
void ProcFileSystem::removeProcess(Task& task)