From 98477da239c066b9630b969c66b6468bbc35a980 Mon Sep 17 00:00:00 2001
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From: Khem Raj <raj.khem@gmail.com>
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Date: Wed, 19 May 2021 17:32:13 -0700
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Subject: [PATCH] compiler-rt: Do not use backtrace APIs on non-glibc linux
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musl e.g. does not provide backtrace APIs
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Upstream-Status: Pending
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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---
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.../lib/gwp_asan/optional/backtrace_linux_libc.cpp | 13 ++++++++++++-
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1 file changed, 12 insertions(+), 1 deletion(-)
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diff --git a/compiler-rt/lib/gwp_asan/optional/backtrace_linux_libc.cpp b/compiler-rt/lib/gwp_asan/optional/backtrace_linux_libc.cpp
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index ea8e72be287d..0344074dd254 100644
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--- a/compiler-rt/lib/gwp_asan/optional/backtrace_linux_libc.cpp
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+++ b/compiler-rt/lib/gwp_asan/optional/backtrace_linux_libc.cpp
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@@ -7,7 +7,9 @@
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//===----------------------------------------------------------------------===//
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#include <assert.h>
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+#ifdef __GLIBC__
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#include <execinfo.h>
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+#endif
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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@@ -21,8 +23,11 @@
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namespace {
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size_t Backtrace(uintptr_t *TraceBuffer, size_t Size) {
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static_assert(sizeof(uintptr_t) == sizeof(void *), "uintptr_t is not void*");
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-
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+#ifdef __GLIBC__
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return backtrace(reinterpret_cast<void **>(TraceBuffer), Size);
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+#else
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+ return -1;
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+#endif
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}
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// We don't need any custom handling for the Segv backtrace - the libc unwinder
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@@ -30,7 +35,11 @@ size_t Backtrace(uintptr_t *TraceBuffer, size_t Size) {
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// to avoid the additional frame.
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GWP_ASAN_ALWAYS_INLINE size_t SegvBacktrace(uintptr_t *TraceBuffer, size_t Size,
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void * /*Context*/) {
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+#ifdef __GLIBC__
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return Backtrace(TraceBuffer, Size);
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+#else
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+ return -1;
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+#endif
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}
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static void PrintBacktrace(uintptr_t *Trace, size_t TraceLength,
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@@ -40,6 +49,7 @@ static void PrintBacktrace(uintptr_t *Trace, size_t TraceLength,
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return;
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}
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+#ifdef __GLIBC__
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char **BacktraceSymbols =
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backtrace_symbols(reinterpret_cast<void **>(Trace), TraceLength);
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@@ -53,6 +63,7 @@ static void PrintBacktrace(uintptr_t *Trace, size_t TraceLength,
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Printf("\n");
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if (BacktraceSymbols)
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free(BacktraceSymbols);
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+#endif
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}
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} // anonymous namespace
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