breakpad: Do not fallback to android implementation for getcontext/setcontext on musl

with musl, it tried to use local implementation which is geared towards
android and does not compile with musl/linux

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-devtools/breakpad/breakpad/0001-Remove-HAVE_GETCONTEXT-check-to-add-local-implementa.patch

@@ -0,0 +1,54 @@
+From 70441611d4e8200d9d16dfed493873b8c1bb57c5 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Mon, 15 Mar 2021 11:33:38 -0700
+Subject: [PATCH] Remove HAVE_GETCONTEXT check to add local implementation
+
+On musl getcontext/setcontext APIs are implemented in libucontext which
+can be used
+
+Upstream-Status: Inappropriate [Musl Specific]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ Makefile.am | 12 ------------
+ 1 file changed, 12 deletions(-)
+
+diff --git a/Makefile.am b/Makefile.am
+index ee7454e4..69700192 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -187,10 +187,6 @@ src_client_linux_libbreakpad_client_a_SOURCES = \
+ 	src/common/linux/linux_libc_support.cc \
+ 	src/common/linux/memory_mapped_file.cc \
+ 	src/common/linux/safe_readlink.cc
+-if !HAVE_GETCONTEXT
+-src_client_linux_libbreakpad_client_a_SOURCES += \
+-	src/common/linux/breakpad_getcontext.S
+-endif
+ endif LINUX_HOST
+ 
+ if !DISABLE_PROCESSOR
+@@ -508,10 +504,6 @@ src_client_linux_linux_client_unittest_shlib_SOURCES = \
+ 	src/processor/minidump.cc \
+ 	src/processor/pathname_stripper.cc \
+ 	src/processor/proc_maps_linux.cc
+-if !HAVE_GETCONTEXT
+-src_client_linux_linux_client_unittest_shlib_SOURCES += \
+-	src/common/linux/breakpad_getcontext.S
+-endif
+ 
+ src_client_linux_linux_client_unittest_shlib_CPPFLAGS = \
+ 	$(AM_CPPFLAGS) $(TEST_CFLAGS)
+@@ -541,10 +533,6 @@ src_client_linux_linux_client_unittest_shlib_LDADD = \
+ 	src/common/string_conversion.o \
+ 	$(TEST_LIBS) \
+ 	$(PTHREAD_CFLAGS) $(PTHREAD_LIBS)
+-if !HAVE_GETCONTEXT
+-src_client_linux_linux_client_unittest_shlib_SOURCES += \
+-	src/common/linux/breakpad_getcontext_unittest.cc
+-endif
+ if ANDROID_HOST
+ src_client_linux_linux_client_unittest_shlib_LDFLAGS += \
+ 	-llog -lm
+-- 
+2.30.2
+

meta-oe/recipes-devtools/breakpad/breakpad/0001-disable-calls-to-getcontext-with-musl.patch

@@ -1,47 +0,0 @@
-From 57ecf7205feedd23f901e1bb9d193787e559e433 Mon Sep 17 00:00:00 2001
-From: Andre McCurdy <armccurdy@gmail.com>
-Date: Tue, 23 Jan 2018 15:13:26 -0800
-Subject: [PATCH] disable calls to getcontext() with musl
-
-Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
----
- src/client/linux/handler/exception_handler.cc | 17 +++++++++++++++++
- 1 file changed, 17 insertions(+)
-
---- a/src/client/linux/handler/exception_handler.cc
-+++ b/src/client/linux/handler/exception_handler.cc
-@@ -490,7 +490,19 @@ bool ExceptionHandler::SimulateSignalDel
-   siginfo.si_code = SI_USER;
-   siginfo.si_pid = getpid();
-   ucontext_t context;
-+#if defined(__GLIBC__)
-   getcontext(&context);
-+#else
-+  // Extreme hack: Allow musl builds to compile - but don't expect them to work.
-+  // Although musl provides a definition for getcontext() in ucontext.h (which
-+  // enough to build libbreakpad_client) musl does not provide a corresponding
-+  // getcontext() function, so builds will fail when attempting to link anything
-+  // with libbreakpad_client. Disabling calls to getcontext() is a temporary
-+  // hack. The real fix is probably to enable Breakpad's own implementation of
-+  // getcontext() when building for musl (it's currently only enabled when
-+  // building for Android).
-+  memset (&context, 0, sizeof(context));
-+#endif
-   return HandleSignal(sig, &siginfo, &context);
- }
- 
-@@ -675,9 +687,14 @@ bool ExceptionHandler::WriteMinidump() {
-   sys_prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
- 
-   CrashContext context;
-+#if defined(__GLIBC__)
-   int getcontext_result = getcontext(&context.context);
-   if (getcontext_result)
-     return false;
-+#else
-+  // Extreme hack - see comments above.
-+  memset (&context.context, 0, sizeof(context.context));
-+#endif
- 
- #if defined(__i386__)
-   // In CPUFillFromUContext in minidumpwriter.cc the stack pointer is retrieved

meta-oe/recipes-devtools/breakpad/breakpad_git.bb

@@ -11,6 +11,8 @@ SECTION = "libs"
 
 inherit autotools
 
+DEPENDS_append_libc-musl = " libucontext"
+
 BBCLASSEXTEND = "native"
 
 PE = "2"
@@ -37,7 +39,7 @@ SRC_URI = "git://github.com/google/breakpad;name=breakpad;branch=main \
            file://0003-Dont-include-stab.h.patch \
            file://0004-elf_reader.cc-include-sys-reg.h-to-get-__WORDSIZE-on.patch \
            file://mcontext.patch \
-           file://0001-disable-calls-to-getcontext-with-musl.patch \
+           file://0001-Remove-HAVE_GETCONTEXT-check-to-add-local-implementa.patch \
            file://0001-lss-Match-syscalls-to-match-musl.patch;patchdir=src/third_party/lss \
            file://mips_asm_sgidefs.patch;patchdir=src/third_party/lss \
            file://0001-Do-not-add-stack-pointer-to-clobber-list.patch;patchdir=src/third_party/lss \
@@ -45,6 +47,7 @@ SRC_URI = "git://github.com/google/breakpad;name=breakpad;branch=main \
 S = "${WORKDIR}/git"
 
 CXXFLAGS += "-D_GNU_SOURCE"
+LDFLAGS_append_libc-musl = " -lucontext"
 
 COMPATIBLE_HOST_powerpc = "null"
 COMPATIBLE_HOST_powerpc64 = "null"