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From e3833b5a620d1e8743c53ebc724fd6cb6775b4a8 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Wed, 19 May 2021 17:32:13 -0700
Subject: [PATCH] compiler-rt: Do not use backtrace APIs on non-glibc linux
musl e.g. does not provide backtrace APIs
Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
.../lib/gwp_asan/optional/backtrace_linux_libc.cpp | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/compiler-rt/lib/gwp_asan/optional/backtrace_linux_libc.cpp b/compiler-rt/lib/gwp_asan/optional/backtrace_linux_libc.cpp
index ea8e72be287d..0344074dd254 100644
--- a/compiler-rt/lib/gwp_asan/optional/backtrace_linux_libc.cpp
+++ b/compiler-rt/lib/gwp_asan/optional/backtrace_linux_libc.cpp
@@ -7,7 +7,9 @@
//===----------------------------------------------------------------------===//
#include <assert.h>
+#ifdef __GLIBC__
#include <execinfo.h>
+#endif
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
@@ -21,8 +23,11 @@
namespace {
size_t Backtrace(uintptr_t *TraceBuffer, size_t Size) {
static_assert(sizeof(uintptr_t) == sizeof(void *), "uintptr_t is not void*");
-
+#ifdef __GLIBC__
return backtrace(reinterpret_cast<void **>(TraceBuffer), Size);
+#else
+ return -1;
+#endif
}
// We don't need any custom handling for the Segv backtrace - the libc unwinder
@@ -30,7 +35,11 @@ size_t Backtrace(uintptr_t *TraceBuffer, size_t Size) {
// to avoid the additional frame.
GWP_ASAN_ALWAYS_INLINE size_t SegvBacktrace(uintptr_t *TraceBuffer, size_t Size,
void * /*Context*/) {
+#ifdef __GLIBC__
return Backtrace(TraceBuffer, Size);
+#else
+ return -1;
+#endif
}
static void PrintBacktrace(uintptr_t *Trace, size_t TraceLength,
@@ -40,6 +49,7 @@ static void PrintBacktrace(uintptr_t *Trace, size_t TraceLength,
return;
}
+#ifdef __GLIBC__
char **BacktraceSymbols =
backtrace_symbols(reinterpret_cast<void **>(Trace), TraceLength);
@@ -53,6 +63,7 @@ static void PrintBacktrace(uintptr_t *Trace, size_t TraceLength,
Printf("\n");
if (BacktraceSymbols)
free(BacktraceSymbols);
+#endif
}
} // anonymous namespace
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