From: Maxim Ostapenko <m.ostapenko@samsung.com>
Date: Tue, 12 Jul 2016 07:26:08 +0000 (+0300)
Subject: Make lsan-force-options and lsan-build-env more usable. Factor out common
X-Git-Tag: accepted/tizen/3.0/base/20161028.102939~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=28a0437c8669094addc3c23a9005f241ec75a8fa;p=platform%2Fupstream%2Flinaro-gcc.git

Make lsan-force-options and lsan-build-env more usable. Factor out common
code from {A, UB}San to sanitizer_common code.

Add -fno-omit-frame-pointer -U_FORTIFY_SOURCE to lsan-force-options because
LSan heavily relies on frame pointers. Disable LSan in QEMU builds through
LSAN_OPTIONS file. Refactor Tizen specific patches in ASan and UBSan.

Change-Id: I95f59243352e75d6cd0eae22e7aaa02ab0e96cfc
Signed-off-by: Maxim Ostapenko <m.ostapenko@samsung.com>
---

diff --git a/libsanitizer/asan/asan_flags.cc b/libsanitizer/asan/asan_flags.cc
index db257c4..4f87cd2 100644
--- a/libsanitizer/asan/asan_flags.cc
+++ b/libsanitizer/asan/asan_flags.cc
@@ -105,21 +105,11 @@ void InitializeFlags() {
   ubsan_parser.ParseString(ubsan_default_options);
 #endif
 
-  // Read from command line.
-  const char *options = GetEnv("ASAN_OPTIONS");
-  // If environment variable ASAN_OPTIONS is not set use predefined file to
-  // init options.
-  bool getFlagsFromFile = options == 0;
-  char *asanFlags = 0;
-  uptr len = GetPageSizeCached();
-  uptr read_len = 0;
-  if (getFlagsFromFile) {
-    ReadFileToBuffer("/ASAN_OPTIONS", &asanFlags, &len, &read_len,
-                     GetPageSizeCached());
-    options = asanFlags;
-  }
-
+  int mmaped = 0;
+  const char *options =
+      GetRuntimeOptions("ASAN_OPTIONS", "/ASAN_OPTIONS", &mmaped);
   asan_parser.ParseString(options);
+
 #if CAN_SANITIZE_LEAKS
   lsan_parser.ParseString(GetEnv("LSAN_OPTIONS"));
 #endif
@@ -179,9 +169,8 @@ void InitializeFlags() {
     f->quarantine_size_mb = kDefaultQuarantineSizeMb;
   }
 
-  if (getFlagsFromFile)
-    UnmapOrDie(asanFlags, len);
-
+  if (mmaped)
+    UnmapOrDie((void *)options, GetPageSizeCached());
 }
 
 }  // namespace __asan
diff --git a/libsanitizer/asan/asan_rtl.cc b/libsanitizer/asan/asan_rtl.cc
index 7f51016..d4dfc1d 100644
--- a/libsanitizer/asan/asan_rtl.cc
+++ b/libsanitizer/asan/asan_rtl.cc
@@ -400,25 +400,11 @@ static void PrintAddressSpaceLayout() {
           kHighShadowBeg > kMidMemEnd);
 }
 
-extern "C"
-int mount(const char *source, const char *target, const char *filesystemtype,
-          unsigned long mountflags, const void *data);
-
 static void MaybeDisableUlimit() {
   if (!AddressSpaceIsUnlimited())
     SetAddressSpaceUnlimited();
 }
 
-bool MaybeMountProcFS() {
-  if (FileExists("/proc/self/maps")) return true;
-
-  if(0 != mount("proc", "/proc", "proc", 0, 0)) {
-    Report("Failed to mount /proc, Asan is likely to fail\n");
-    return false;
-  }
-  return true;
-}
-
 static void AsanInitInternal() {
   if (LIKELY(asan_inited)) return;
   MaybeMountProcFS();
diff --git a/libsanitizer/lsan/lsan.cc b/libsanitizer/lsan/lsan.cc
index c39d8cf..1c0df71 100644
--- a/libsanitizer/lsan/lsan.cc
+++ b/libsanitizer/lsan/lsan.cc
@@ -15,6 +15,7 @@
 #include "sanitizer_common/sanitizer_flags.h"
 #include "sanitizer_common/sanitizer_flag_parser.h"
 #include "sanitizer_common/sanitizer_stacktrace.h"
+#include "sanitizer_common/sanitizer_libc.h"
 #include "lsan_allocator.h"
 #include "lsan_common.h"
 #include "lsan_thread.h"
@@ -53,13 +54,20 @@ static void InitializeFlags() {
   RegisterLsanFlags(&parser, f);
   RegisterCommonFlags(&parser);
 
-  parser.ParseString(GetEnv("LSAN_OPTIONS"));
+  int mmaped = 0;
+  const char *options =
+      GetRuntimeOptions("LSAN_OPTIONS", "/LSAN_OPTIONS", &mmaped);
+  parser.ParseString(options);
 
   SetVerbosity(common_flags()->verbosity);
 
   if (Verbosity()) ReportUnrecognizedFlags();
 
   if (common_flags()->help) parser.PrintFlagDescriptions();
+  __sanitizer_set_report_path(common_flags()->log_path);
+
+  if (mmaped)
+    UnmapOrDie((void *)options, GetPageSizeCached());
 }
 
 extern "C" void __lsan_init() {
diff --git a/libsanitizer/sanitizer_common/sanitizer_common.cc b/libsanitizer/sanitizer_common/sanitizer_common.cc
index d4ecf25..7c7a6c8 100644
--- a/libsanitizer/sanitizer_common/sanitizer_common.cc
+++ b/libsanitizer/sanitizer_common/sanitizer_common.cc
@@ -460,6 +460,24 @@ void PrintCmdline() {
   Printf("\n\n");
 }
 
+const char *GetRuntimeOptions(const char *env_option, const char *filename,
+                              int *mmaped) {
+  // Read from command line.
+  const char *options = GetEnv(env_option);
+  // If environment variable {A, L, UB}SAN_OPTIONS is not set use predefined
+  // file to init options.
+  bool getFlagsFromFile = options == 0;
+  char *flags = 0;
+  uptr len = GetPageSizeCached();
+  uptr read_len = 0;
+  if (getFlagsFromFile) {
+    ReadFileToBuffer(filename, &flags, &len, &read_len, GetPageSizeCached());
+    *mmaped = 1;
+    options = flags;
+  }
+  return options;
+}
+
 } // namespace __sanitizer
 
 using namespace __sanitizer;  // NOLINT
diff --git a/libsanitizer/sanitizer_common/sanitizer_common.h b/libsanitizer/sanitizer_common/sanitizer_common.h
index 1550154..0ac1cd1 100644
--- a/libsanitizer/sanitizer_common/sanitizer_common.h
+++ b/libsanitizer/sanitizer_common/sanitizer_common.h
@@ -712,6 +712,9 @@ struct SignalContext {
 
 void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp);
 
+const char *GetRuntimeOptions(const char *env_option, const char *filename,
+                              int *mmaped);
+
 }  // namespace __sanitizer
 
 inline void *operator new(__sanitizer::operator_new_size_type size,
diff --git a/libsanitizer/sanitizer_common/sanitizer_libc.cc b/libsanitizer/sanitizer_common/sanitizer_libc.cc
index 05fdca6..d3d9cfe 100644
--- a/libsanitizer/sanitizer_common/sanitizer_libc.cc
+++ b/libsanitizer/sanitizer_common/sanitizer_libc.cc
@@ -258,4 +258,15 @@ bool mem_is_zero(const char *beg, uptr size) {
   return all == 0;
 }
 
+bool MaybeMountProcFS() {
+  if (FileExists("/proc/self/maps"))
+    return true;
+
+  if (0 != mount("proc", "/proc", "proc", 0, 0)) {
+    Report("Failed to mount /proc, %s is likely to fail\n", SanitizerToolName);
+    return false;
+  }
+  return true;
+}
+
 } // namespace __sanitizer
diff --git a/libsanitizer/sanitizer_common/sanitizer_libc.h b/libsanitizer/sanitizer_common/sanitizer_libc.h
index 1b3f8ed..f9f5820 100644
--- a/libsanitizer/sanitizer_common/sanitizer_libc.h
+++ b/libsanitizer/sanitizer_common/sanitizer_libc.h
@@ -76,6 +76,12 @@ uptr internal_sched_yield();
 // Error handling
 bool internal_iserror(uptr retval, int *rverrno = nullptr);
 
+extern "C" int mount(const char *source, const char *target,
+                     const char *filesystemtype, unsigned long mountflags,
+                     const void *data);
+
+bool MaybeMountProcFS();
+
 } // namespace __sanitizer
 
 #endif // SANITIZER_LIBC_H
diff --git a/libsanitizer/ubsan/ubsan_flags.cc b/libsanitizer/ubsan/ubsan_flags.cc
index f3496d3..d94da279 100644
--- a/libsanitizer/ubsan/ubsan_flags.cc
+++ b/libsanitizer/ubsan/ubsan_flags.cc
@@ -56,20 +56,13 @@ void InitializeFlags() {
   // Override from user-specified string.
   parser.ParseString(MaybeCallUbsanDefaultOptions());
 
-  // Read from command line.
-  const char *options = GetEnv("UBSAN_OPTIONS");
-  char *ubsanFlags = 0;
-  uptr len = GetPageSizeCached();
-  uptr read_len = 0;
-  bool getFlagsFromFile = ubsanFlags == 0;
-  // Override from predefined file if exists.
-  if (getFlagsFromFile) {
-    ReadFileToBuffer("/UBSAN_OPTIONS", &ubsanFlags, &len, &read_len,
-                     GetPageSizeCached());
-    options = ubsanFlags;
-  }
+  int mmaped = 0;
+  const char *options =
+      GetRuntimeOptions("UBSAN_OPTIONS", "/UBSAN_OPTIONS", &mmaped);
   parser.ParseString(options);
-  UnmapOrDie(ubsanFlags, len);
+
+  if (mmaped)
+    UnmapOrDie((void *)options, GetPageSizeCached());
   SetVerbosity(common_flags()->verbosity);
   if (Verbosity()) ReportUnrecognizedFlags();
 
diff --git a/packaging/LSAN_OPTIONS b/packaging/LSAN_OPTIONS
new file mode 100644
index 0000000..cc480ba
--- /dev/null
+++ b/packaging/LSAN_OPTIONS
@@ -0,0 +1 @@
+detect_leaks=0
diff --git a/packaging/gcc-aarch64.spec b/packaging/gcc-aarch64.spec
index a8f6a08..d2b206c 100644
--- a/packaging/gcc-aarch64.spec
+++ b/packaging/gcc-aarch64.spec
@@ -87,7 +87,8 @@ Source15: gcc-force-options
 Source16: gcc-unforce-options
 Source17: ASAN_OPTIONS
 Source18: asan_symbolize.py
-Source19: gcc.manifest
+Source19: LSAN_OPTIONS
+Source20: gcc.manifest
 Group:         Development/Building
 Summary:       The GNU C Compiler and Support Files
 License:       GPL-3.0+
@@ -651,13 +652,14 @@ Scripts for LSan instrumentation
 # Change mode to allow all users to run gcc-force/unforce-options
 chmod a+w /usr/bin
 [ -d /emul/ ] && chmod a+w /emul/usr/bin/ && chmod a+w /emul/home/abuild/rpmbuild/BUILD/gcc-4.9.2/obj/gcc/
-/usr/bin/gcc-force-options -fsanitize=leak
+/usr/bin/gcc-force-options -fsanitize=leak -fno-omit-frame-pointer -U_FORTIFY_SOURCE
 
 %preun -n lsan-force-options
 # Restore read-only mode
 chmod a-w /usr/bin
 [ -d /emul/ ] && chmod a-w /emul/usr/bin/ && chmod a-w /emul/home/abuild/rpmbuild/BUILD/gcc-4.9.2/obj/gcc/
 /usr/bin/gcc-unforce-options
+[ -d /emul/ ] && chmod a-w /emul/usr/bin/
 
 %package -n asan-build-env
 Summary:    Asan build environment
@@ -689,7 +691,7 @@ Lsan build environment
 %post -n lsan-build-env
 # Add /usr/lib64/liblsan.so to /etc/ld.so.preload
 [ -f /etc/ld.so.preload ] && mv -v /etc/ld.so.preload /etc/ld.so.preload.orig
-echo "%{libdir}/liblsan.so" > /etc/ld.so.preload
+echo "liblsan.so" > /etc/ld.so.preload
 [ -f /etc/ld.so.preload.orig ] && cat /etc/ld.so.preload.orig >> /etc/ld.so.preload
 [ -f /etc/ld.so.preload.orig ] && rm -f /etc/ld.so.preload.orig
 
@@ -738,7 +740,7 @@ plugins build.
 %prep
 
 %setup -q -n gcc-%{version}
-cp %{SOURCE19} .
+cp %{SOURCE20} .
 
 tar xf %{SOURCE10}
 ln -sf gmp-6.0.0 gmp
@@ -908,6 +910,11 @@ chmod a+x %{buildroot}%{_prefix}/bin/asan_symbolize.py
 
 cp %{SOURCE17} %{buildroot}
 chmod 644 %{buildroot}/ASAN_OPTIONS
+
+%ifarch %lsan_arch
+cp %{SOURCE19} %{buildroot}
+chmod 644 %{buildroot}/LSAN_OPTIONS
+%endif
 }
 
 %files
@@ -1157,6 +1164,7 @@ chmod 644 %{buildroot}/ASAN_OPTIONS
 %ifarch %lsan_arch
 %files -n lsan-build-env
 %defattr(-,root,root,-)
+/LSAN_OPTIONS
 %endif
 
 %files -n sanitizer-devel
diff --git a/packaging/gcc-armv7l.spec b/packaging/gcc-armv7l.spec
index 016c272..3822649 100644
--- a/packaging/gcc-armv7l.spec
+++ b/packaging/gcc-armv7l.spec
@@ -87,7 +87,8 @@ Source15: gcc-force-options
 Source16: gcc-unforce-options
 Source17: ASAN_OPTIONS
 Source18: asan_symbolize.py
-Source19: gcc.manifest
+Source19: LSAN_OPTIONS
+Source20: gcc.manifest
 Group:         Development/Building
 Summary:       The GNU C Compiler and Support Files
 License:       GPL-3.0+
@@ -651,13 +652,14 @@ Scripts for LSan instrumentation
 # Change mode to allow all users to run gcc-force/unforce-options
 chmod a+w /usr/bin
 [ -d /emul/ ] && chmod a+w /emul/usr/bin/ && chmod a+w /emul/home/abuild/rpmbuild/BUILD/gcc-4.9.2/obj/gcc/
-/usr/bin/gcc-force-options -fsanitize=leak
+/usr/bin/gcc-force-options -fsanitize=leak -fno-omit-frame-pointer -U_FORTIFY_SOURCE
 
 %preun -n lsan-force-options
 # Restore read-only mode
 chmod a-w /usr/bin
 [ -d /emul/ ] && chmod a-w /emul/usr/bin/ && chmod a-w /emul/home/abuild/rpmbuild/BUILD/gcc-4.9.2/obj/gcc/
 /usr/bin/gcc-unforce-options
+[ -d /emul/ ] && chmod a-w /emul/usr/bin/
 
 %package -n asan-build-env
 Summary:    Asan build environment
@@ -689,7 +691,7 @@ Lsan build environment
 %post -n lsan-build-env
 # Add /usr/lib64/liblsan.so to /etc/ld.so.preload
 [ -f /etc/ld.so.preload ] && mv -v /etc/ld.so.preload /etc/ld.so.preload.orig
-echo "%{libdir}/liblsan.so" > /etc/ld.so.preload
+echo "liblsan.so" > /etc/ld.so.preload
 [ -f /etc/ld.so.preload.orig ] && cat /etc/ld.so.preload.orig >> /etc/ld.so.preload
 [ -f /etc/ld.so.preload.orig ] && rm -f /etc/ld.so.preload.orig
 
@@ -738,7 +740,7 @@ plugins build.
 %prep
 
 %setup -q -n gcc-%{version}
-cp %{SOURCE19} .
+cp %{SOURCE20} .
 
 tar xf %{SOURCE10}
 ln -sf gmp-6.0.0 gmp
@@ -908,6 +910,11 @@ chmod a+x %{buildroot}%{_prefix}/bin/asan_symbolize.py
 
 cp %{SOURCE17} %{buildroot}
 chmod 644 %{buildroot}/ASAN_OPTIONS
+
+%ifarch %lsan_arch
+cp %{SOURCE19} %{buildroot}
+chmod 644 %{buildroot}/LSAN_OPTIONS
+%endif
 }
 
 %files
@@ -1157,6 +1164,7 @@ chmod 644 %{buildroot}/ASAN_OPTIONS
 %ifarch %lsan_arch
 %files -n lsan-build-env
 %defattr(-,root,root,-)
+/LSAN_OPTIONS
 %endif
 
 %files -n sanitizer-devel
diff --git a/packaging/linaro-gcc.spec b/packaging/linaro-gcc.spec
index 6a74463..5675485 100644
--- a/packaging/linaro-gcc.spec
+++ b/packaging/linaro-gcc.spec
@@ -84,7 +84,8 @@ Source15: gcc-force-options
 Source16: gcc-unforce-options
 Source17: ASAN_OPTIONS
 Source18: asan_symbolize.py
-Source19: gcc.manifest
+Source19: LSAN_OPTIONS
+Source20: gcc.manifest
 Group:         Development/Building
 Summary:       The GNU C Compiler and Support Files
 License:       GPL-3.0+
@@ -648,13 +649,14 @@ Scripts for LSan instrumentation
 # Change mode to allow all users to run gcc-force/unforce-options
 chmod a+w /usr/bin
 [ -d /emul/ ] && chmod a+w /emul/usr/bin/ && chmod a+w /emul/home/abuild/rpmbuild/BUILD/gcc-4.9.2/obj/gcc/
-/usr/bin/gcc-force-options -fsanitize=leak
+/usr/bin/gcc-force-options -fsanitize=leak -fno-omit-frame-pointer -U_FORTIFY_SOURCE
 
 %preun -n lsan-force-options
 # Restore read-only mode
 chmod a-w /usr/bin
 [ -d /emul/ ] && chmod a-w /emul/usr/bin/ && chmod a-w /emul/home/abuild/rpmbuild/BUILD/gcc-4.9.2/obj/gcc/
 /usr/bin/gcc-unforce-options
+[ -d /emul/ ] && chmod a-w /emul/usr/bin/
 
 %package -n asan-build-env
 Summary:    Asan build environment
@@ -686,7 +688,7 @@ Lsan build environment
 %post -n lsan-build-env
 # Add /usr/lib64/liblsan.so to /etc/ld.so.preload
 [ -f /etc/ld.so.preload ] && mv -v /etc/ld.so.preload /etc/ld.so.preload.orig
-echo "%{libdir}/liblsan.so" > /etc/ld.so.preload
+echo "liblsan.so" > /etc/ld.so.preload
 [ -f /etc/ld.so.preload.orig ] && cat /etc/ld.so.preload.orig >> /etc/ld.so.preload
 [ -f /etc/ld.so.preload.orig ] && rm -f /etc/ld.so.preload.orig
 
@@ -735,7 +737,7 @@ plugins build.
 %prep
 
 %setup -q -n gcc-%{version}
-cp %{SOURCE19} .
+cp %{SOURCE20} .
 
 tar xf %{SOURCE10}
 ln -sf gmp-6.0.0 gmp
@@ -905,6 +907,11 @@ chmod a+x %{buildroot}%{_prefix}/bin/asan_symbolize.py
 
 cp %{SOURCE17} %{buildroot}
 chmod 644 %{buildroot}/ASAN_OPTIONS
+
+%ifarch %lsan_arch
+cp %{SOURCE19} %{buildroot}
+chmod 644 %{buildroot}/LSAN_OPTIONS
+%endif
 }
 
 %files
@@ -1154,6 +1161,7 @@ chmod 644 %{buildroot}/ASAN_OPTIONS
 %ifarch %lsan_arch
 %files -n lsan-build-env
 %defattr(-,root,root,-)
+/LSAN_OPTIONS
 %endif
 
 %files -n sanitizer-devel