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diff --git a/lldb/source/Plugins/Process/FreeBSDKernel/ProcessFreeBSDKernel.cpp b/lldb/source/Plugins/Process/FreeBSDKernel/ProcessFreeBSDKernel.cpp
index e3707365a9c3..c4a9c82f3c63 100644
--- a/lldb/source/Plugins/Process/FreeBSDKernel/ProcessFreeBSDKernel.cpp
+++ b/lldb/source/Plugins/Process/FreeBSDKernel/ProcessFreeBSDKernel.cpp
@@ -38,6 +38,8 @@ public:
size_t DoReadMemory(lldb::addr_t addr, void *buf, size_t size,
lldb_private::Status &error) override;
+ size_t DoWriteMemory(lldb::addr_t vm_addr, const void *buf,
+ size_t size, Status &error) override;
private:
fvc_t *m_fvc;
@@ -185,6 +187,7 @@ bool ProcessFreeBSDKernel::DoUpdateThreadList(ThreadList &old_thread_list,
// iterate through a linked list of all processes
// allproc is a pointer to the first list element, p_list field
// (found at offset_p_list) specifies the next element
+ lldb::addr_t prev = 0;
for (lldb::addr_t proc =
ReadPointerFromMemory(FindSymbol("allproc"), error);
proc != 0 && proc != LLDB_INVALID_ADDRESS;
@@ -195,6 +198,8 @@ bool ProcessFreeBSDKernel::DoUpdateThreadList(ThreadList &old_thread_list,
char comm[fbsd_maxcomlen + 1];
ReadCStringFromMemory(proc + offset_p_comm, comm, sizeof(comm), error);
+ bool interesting = false;
+
// iterate through a linked list of all process' threads
// the initial thread is found in process' p_threads, subsequent
// elements are linked via td_plist field
@@ -231,6 +236,7 @@ bool ProcessFreeBSDKernel::DoUpdateThreadList(ThreadList &old_thread_list,
// NB: dumppcb can be LLDB_INVALID_ADDRESS if reading it failed
pcb_addr = dumppcb;
thread_desc += " (crashed)";
+ interesting = true;
} else if (oncpu != -1) {
// if we managed to read stoppcbs and pcb_size, use them to find
// the correct PCB
@@ -239,13 +245,27 @@ bool ProcessFreeBSDKernel::DoUpdateThreadList(ThreadList &old_thread_list,
else
pcb_addr = LLDB_INVALID_ADDRESS;
thread_desc += llvm::formatv(" (on CPU {0})", oncpu);
+ interesting = true;
}
ThreadSP thread_sp{
new ThreadFreeBSDKernel(*this, tid, pcb_addr, thread_desc)};
new_thread_list.AddThread(thread_sp);
}
+
+ if (interesting) {
+ printf("pid %d is interesting\n", pid);
+ if (prev != 0) {
+ printf("will link %d to %d\n", prev, proc);
+ if (!WritePointerToMemory(prev + offset_p_list, proc, error))
+ assert(0 && "write failed");
+ }
+ prev = proc;
+ }
}
+ printf("last: %d\n", prev);
+ if (!WritePointerToMemory(prev + offset_p_list, 0, error))
+ assert(0 && "write failed");
} else {
const uint32_t num_threads = old_thread_list.GetSize(false);
for (uint32_t i = 0; i < num_threads; ++i)
@@ -295,6 +315,18 @@ size_t ProcessFreeBSDKernelFVC::DoReadMemory(lldb::addr_t addr, void *buf,
return rd;
}
+size_t ProcessFreeBSDKernelFVC::DoWriteMemory(lldb::addr_t vm_addr, const void *buf,
+ size_t size, Status &error) {
+ ssize_t rd = 0;
+ rd = fvc_write(m_fvc, vm_addr, buf, size);
+ printf("fvc_write(%p, %p, %d) -> %d\n", vm_addr, buf, size, rd);
+ if (rd < 0 || static_cast<size_t>(rd) != size) {
+ error.SetErrorStringWithFormat("Writing memory failed: %s", GetError());
+ return rd > 0 ? rd : 0;
+ }
+ return rd;
+}
+
const char *ProcessFreeBSDKernelFVC::GetError() { return fvc_geterr(m_fvc); }
#endif // LLDB_ENABLE_FBSDVMCORE
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