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Kernel: Don't allow dump_backtrace() to call dump_backtrace().

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That was not a very graceful looking loop to be stuck in.
This commit is contained in:
Andreas Kling 2019-05-18 17:31:52 +02:00
parent ec0d598934
commit d2c3749cf3
1 changed files with 7 additions and 0 deletions
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7
Kernel/KSyms.cpp
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@ -3,6 +3,7 @@
#include "Scheduler.h" #include "Scheduler.h"
#include <Kernel/FileSystem/FileDescriptor.h> #include <Kernel/FileSystem/FileDescriptor.h>
#include <Kernel/ELF/ELFLoader.h> #include <Kernel/ELF/ELFLoader.h>
#include <AK/TemporaryChange.h>
static KSym* s_ksyms; static KSym* s_ksyms;
dword ksym_lowest_address; dword ksym_lowest_address;
@ -132,6 +133,12 @@ static void load_ksyms_from_data(const ByteBuffer& buffer)
void dump_backtrace() void dump_backtrace()
{ {
static bool in_dump_backtrace = false;
if (in_dump_backtrace) {
dbgprintf("dump_backtrace() called from within itself, what the hell is going on!\n");
return;
}
TemporaryChange change(in_dump_backtrace, true);
dword ebp; dword ebp;
asm volatile("movl %%ebp, %%eax":"=a"(ebp)); asm volatile("movl %%ebp, %%eax":"=a"(ebp));
dump_backtrace_impl(ebp, ksyms_ready); dump_backtrace_impl(ebp, ksyms_ready);