summaryrefslogtreecommitdiffstats
path: root/tools/build/feature
diff options
context:
space:
mode:
authorArnaldo Carvalho de Melo <acme@redhat.com>2016-04-05 11:33:41 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-05-12 11:26:59 -0300
commit4924734570a073049450b11f7c59ce5992b03343 (patch)
tree7fbf3af95e3702b0dca4a0cb213f2ebbba44671f /tools/build/feature
parent62aa0e177d278462145a29c30d3c8501ae57e200 (diff)
downloadlinux-4924734570a073049450b11f7c59ce5992b03343.tar.bz2
perf probe: Check if dwarf_getlocations() is available
If not, tell the user that: config/Makefile:273: Old libdw.h, finding variables at given 'perf probe' point will not work, install elfutils-devel/libdw-dev >= 0.157 And return -ENOTSUPP in die_get_var_range(), failing features that need it, like the one pointed out above. This fixes the build on older systems, such as Ubuntu 12.04.5. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Vinson Lee <vlee@freedesktop.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-9l7luqkq4gfnx7vrklkq4obs@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/build/feature')
-rw-r--r--tools/build/feature/Makefile4
-rw-r--r--tools/build/feature/test-all.c5
-rw-r--r--tools/build/feature/test-dwarf_getlocations.c12
3 files changed, 21 insertions, 0 deletions
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index c5f4c417428d..4ae94dbfdab9 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -3,6 +3,7 @@ FILES= \
test-backtrace.bin \
test-bionic.bin \
test-dwarf.bin \
+ test-dwarf_getlocations.bin \
test-fortify-source.bin \
test-sync-compare-and-swap.bin \
test-glibc.bin \
@@ -82,6 +83,9 @@ endif
$(OUTPUT)test-dwarf.bin:
$(BUILD) $(DWARFLIBS)
+$(OUTPUT)test-dwarf_getlocations.bin:
+ $(BUILD) $(DWARFLIBS)
+
$(OUTPUT)test-libelf-mmap.bin:
$(BUILD) -lelf
diff --git a/tools/build/feature/test-all.c b/tools/build/feature/test-all.c
index e499a36c1e4a..a282e8cb84f3 100644
--- a/tools/build/feature/test-all.c
+++ b/tools/build/feature/test-all.c
@@ -41,6 +41,10 @@
# include "test-dwarf.c"
#undef main
+#define main main_test_dwarf_getlocations
+# include "test-dwarf_getlocations.c"
+#undef main
+
#define main main_test_libelf_getphdrnum
# include "test-libelf-getphdrnum.c"
#undef main
@@ -143,6 +147,7 @@ int main(int argc, char *argv[])
main_test_libelf_mmap();
main_test_glibc();
main_test_dwarf();
+ main_test_dwarf_getlocations();
main_test_libelf_getphdrnum();
main_test_libunwind();
main_test_libaudit();
diff --git a/tools/build/feature/test-dwarf_getlocations.c b/tools/build/feature/test-dwarf_getlocations.c
new file mode 100644
index 000000000000..70162699dd43
--- /dev/null
+++ b/tools/build/feature/test-dwarf_getlocations.c
@@ -0,0 +1,12 @@
+#include <stdlib.h>
+#include <elfutils/libdw.h>
+
+int main(void)
+{
+ Dwarf_Addr base, start, end;
+ Dwarf_Attribute attr;
+ Dwarf_Op *op;
+ size_t nops;
+ ptrdiff_t offset = 0;
+ return (int)dwarf_getlocations(&attr, offset, &base, &start, &end, &op, &nops);
+}