From cde9070d9970eef1f7ec2360586c802a16230ad8 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:43:50 +0000
Subject: [PATCH] rtl88x2CE_WiFi_linux driver
---
kernel/tools/perf/arch/x86/tests/dwarf-unwind.c | 18 +++++++++++++++++-
1 files changed, 17 insertions(+), 1 deletions(-)
diff --git a/kernel/tools/perf/arch/x86/tests/dwarf-unwind.c b/kernel/tools/perf/arch/x86/tests/dwarf-unwind.c
index 7879df3..478078f 100644
--- a/kernel/tools/perf/arch/x86/tests/dwarf-unwind.c
+++ b/kernel/tools/perf/arch/x86/tests/dwarf-unwind.c
@@ -3,6 +3,7 @@
#include "perf_regs.h"
#include "thread.h"
#include "map.h"
+#include "maps.h"
#include "event.h"
#include "debug.h"
#include "tests/tests.h"
@@ -26,7 +27,7 @@
sp = (unsigned long) regs[PERF_REG_X86_SP];
- map = map_groups__find(thread->mg, (u64)sp);
+ map = maps__find(thread->maps, (u64)sp);
if (!map) {
pr_debug("failed to get stack map\n");
free(buf);
@@ -37,6 +38,13 @@
stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
memcpy(buf, (void *) sp, stack_size);
+#ifdef MEMORY_SANITIZER
+ /*
+ * Copying the stack may copy msan poison, avoid false positives in the
+ * unwinder by removing the poison here.
+ */
+ __msan_unpoison(buf, stack_size);
+#endif
stack->data = (char *) buf;
stack->size = stack_size;
return 0;
@@ -54,6 +62,14 @@
return -1;
}
+#ifdef MEMORY_SANITIZER
+ /*
+ * Assignments to buf in the assembly function perf_regs_load aren't
+ * seen by memory sanitizer. Zero the memory to convince memory
+ * sanitizer the memory is initialized.
+ */
+ memset(buf, 0, sizeof(u64) * PERF_REGS_MAX);
+#endif
perf_regs_load(buf);
regs->abi = PERF_SAMPLE_REGS_ABI;
regs->regs = buf;
--
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