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native profiling support

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only works with Linux for now
This commit is contained in:
Ludwig Ortmann 2014-02-26 10:43:07 +01:00
parent a134bb4238
commit 8ef02d3b9d
3 changed files with 21 additions and 7 deletions
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11
boards/native/Makefile.include
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@ -26,9 +26,9 @@ export ASFLAGS =
export DEBUGGER_FLAGS = $(ELF)
export VALGRIND_FLAGS ?= --track-origins=yes
all-valgrind: export CFLAGS += -DHAVE_VALGRIND_H -g
all-valgrind: export NATIVEINCLUDES += $(shell pkg-config valgrind --cflags)
export INCLUDES += $(NATIVEINCLUDES)
all-valgrind: export INCLUDES += $(shell pkg-config valgrind --cflags)
all-profile: export CFLAGS += -pg
all-profile: export LINKFLAGS += -pg
# backward compatability with glibc <= 2.17 for native
ifeq ($(CPU),native)
@ -56,6 +56,8 @@ endif
all: # do not override first target
all-profile: all
all-valgrind: all
valgrind:
@ -63,3 +65,6 @@ valgrind:
# echo 0 > /proc/sys/kernel/yama/ptrace_scope
# VALGRIND_FLAGS += --db-attach=yes
$(VALGRIND) $(VALGRIND_FLAGS) $(ELF) $(PORT)
profile:
gprof $(ELF)

1
cpu/native/startup.c
View File

@ -186,7 +186,6 @@ __attribute__((constructor)) static void startup(int argc, char **argv)
*(void **)(&real_read) = dlsym(RTLD_NEXT, "read");
*(void **)(&real_write) = dlsym(RTLD_NEXT, "write");
*(void **)(&real_malloc) = dlsym(RTLD_NEXT, "malloc");
*(void **)(&real_calloc) = dlsym(RTLD_NEXT, "calloc");
*(void **)(&real_realloc) = dlsym(RTLD_NEXT, "realloc");
*(void **)(&real_free) = dlsym(RTLD_NEXT, "free");

16
cpu/native/syscalls.c
View File

@ -107,12 +107,22 @@ void free(void *ptr)
_native_syscall_leave();
}
int _native_in_calloc;
void *calloc(size_t nmemb, size_t size)
{
/* XXX: This is a dirty hack to enable old dlsym versions to run.
* Throw it out when Ubuntu 12.04 support runs out (in 2017-04)! */
/* dynamically load calloc when it's needed - this is necessary to
* support profiling as it uses calloc before startup runs */
if (!real_calloc) {
return NULL;
if (_native_in_calloc) {
/* XXX: This is a dirty hack to enable old dlsym versions to run.
* Throw it out when Ubuntu 12.04 support runs out (in 2017-04)! */
return NULL;
}
else {
_native_in_calloc = 1;
*(void **)(&real_calloc) = dlsym(RTLD_NEXT, "calloc");
_native_in_calloc = 0;
}
}
void *r;