================
@@ -0,0 +1,66 @@
+"""
+Test lldb's ability to read and write the LoongArch LASX registers.
+"""
+
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class LoongArch64LinuxRegisters(TestBase):
+ NO_DEBUG_INFO_TESTCASE = True
+
+ def make_lasx_value(self, n):
+ return "{" + " ".join(["0x{:02x}".format(n)] * 32) + "}"
+
+ def check_lasx_values(self, value_offset):
+ for i in range(32):
+ self.expect(
+ "register read xr{}".format(i),
+ substrs=[self.make_lasx_value(i + value_offset)],
+ )
+
+ def lasx_registers_impl(self):
+ self.build()
+ self.runCmd("file " + self.getBuildArtifact("a.out"),
CURRENT_EXECUTABLE_SET)
+
+ lldbutil.run_break_set_by_file_and_line(
+ self,
+ "main.c",
+ line_number("main.c", "// Set break point at this line."),
+ num_expected_locations=1,
+ )
+
+ self.runCmd("run", RUN_SUCCEEDED)
+
+ if self.process().GetState() == lldb.eStateExited:
+ self.fail("Test program failed to run.")
+
+ self.expect(
+ "thread list",
+ STOPPED_DUE_TO_BREAKPOINT,
+ substrs=["stopped", "stop reason = breakpoint"],
+ )
+
+ self.check_lasx_values(0)
+ self.runCmd("expression write_lasx_regs(2)")
----------------
wangleiat wrote:
I'm not sure why this is happening, but these registers are indeed being
modified on the LoongArch system. It's too late today, so I'll analyze the
issue tomorrow.
```
Process 3442462 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
frame #0: 0x0000555555554784 a.out`main(argc=1, argv=0x00007ffffffef918) at
lsx.c:13:10
10 }
11
12 int main(int argc, char *argv[]) {
-> 13 return 0;
14 }
(lldb) register read vr0
vr0 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
(lldb) p write_lsx_regs(1)
(lldb) register read vr0
vr0 = {0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01
0x01 0x01 0x01}
(lldb)
```
https://github.com/llvm/llvm-project/pull/120664
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