diff options
author | Justin Bogner <mail@justinbogner.com> | 2014-12-09 22:07:25 +0000 |
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committer | Justin Bogner <mail@justinbogner.com> | 2014-12-09 22:07:25 +0000 |
commit | 1cb0340832144a59d7ab849f1f4fffee22e39d90 (patch) | |
tree | 3f377abdf35fd0d1523fa524feeff6c31fddd2f8 /lib/profile/InstrProfilingBuffer.c | |
parent | a371b02fccce7d968732449b2f094380cfe3d4f8 (diff) |
profile: Add low level versions of profile buffer functions
On Darwin, compiler_rt uses magic linker symbols to find the profile
counters in the __DATA segment. This is a reasonable method for
normal, hosted, userspace programs. However programs with custom
memory layouts, such as the kernel, will need to tell compiler_rt
explicitly where to find these sections.
Patch by Lawrence D'Anna. Thanks!
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@223840 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/profile/InstrProfilingBuffer.c')
-rw-r--r-- | lib/profile/InstrProfilingBuffer.c | 43 |
1 files changed, 39 insertions, 4 deletions
diff --git a/lib/profile/InstrProfilingBuffer.c b/lib/profile/InstrProfilingBuffer.c index 3351b07ba..3c429c8a8 100644 --- a/lib/profile/InstrProfilingBuffer.c +++ b/lib/profile/InstrProfilingBuffer.c @@ -8,17 +8,38 @@ \*===----------------------------------------------------------------------===*/ #include "InstrProfiling.h" +#include "InstrProfilingInternal.h" + #include <string.h> __attribute__((visibility("hidden"))) uint64_t __llvm_profile_get_size_for_buffer(void) { + const __llvm_profile_data *DataBegin = __llvm_profile_begin_data(); + const __llvm_profile_data *DataEnd = __llvm_profile_end_data(); + const uint64_t *CountersBegin = __llvm_profile_begin_counters(); + const uint64_t *CountersEnd = __llvm_profile_end_counters(); + const char *NamesBegin = __llvm_profile_begin_names(); + const char *NamesEnd = __llvm_profile_end_names(); + + return __llvm_profile_get_size_for_buffer_internal( + DataBegin, DataEnd, CountersBegin, CountersEnd, NamesBegin, NamesEnd); +} + +#define PROFILE_RANGE_SIZE(Range) (Range##End - Range##Begin) + +__attribute__((visibility("hidden"))) +uint64_t __llvm_profile_get_size_for_buffer_internal( + const __llvm_profile_data *DataBegin, + const __llvm_profile_data *DataEnd, const uint64_t *CountersBegin, + const uint64_t *CountersEnd, const char *NamesBegin, + const char *NamesEnd) { /* Match logic in __llvm_profile_write_buffer(). */ - const uint64_t NamesSize = PROFILE_RANGE_SIZE(names) * sizeof(char); + const uint64_t NamesSize = PROFILE_RANGE_SIZE(Names) * sizeof(char); const uint64_t Padding = sizeof(uint64_t) - NamesSize % sizeof(uint64_t); return sizeof(uint64_t) * PROFILE_HEADER_SIZE + - PROFILE_RANGE_SIZE(data) * sizeof(__llvm_profile_data) + - PROFILE_RANGE_SIZE(counters) * sizeof(uint64_t) + - NamesSize + Padding; + PROFILE_RANGE_SIZE(Data) * sizeof(__llvm_profile_data) + + PROFILE_RANGE_SIZE(Counters) * sizeof(uint64_t) + + NamesSize + Padding; } __attribute__((visibility("hidden"))) @@ -33,6 +54,20 @@ int __llvm_profile_write_buffer(char *Buffer) { const char *NamesBegin = __llvm_profile_begin_names(); const char *NamesEnd = __llvm_profile_end_names(); + return __llvm_profile_write_buffer_internal(Buffer, DataBegin, DataEnd, + CountersBegin, CountersEnd, + NamesBegin, NamesEnd); +} + +__attribute__((visibility("hidden"))) +int __llvm_profile_write_buffer_internal( + char *Buffer, const __llvm_profile_data *DataBegin, + const __llvm_profile_data *DataEnd, const uint64_t *CountersBegin, + const uint64_t *CountersEnd, const char *NamesBegin, const char *NamesEnd) { + /* Match logic in __llvm_profile_get_size_for_buffer(). + * Match logic in __llvm_profile_write_file(). + */ + /* Calculate size of sections. */ const uint64_t DataSize = DataEnd - DataBegin; const uint64_t CountersSize = CountersEnd - CountersBegin; |