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Remove some old dead code from ftrace

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This commit is contained in:
Justine Tunney 2022-05-20 04:01:50 -07:00
parent b4ae385a6a
commit 4245da19e2
2 changed files with 14 additions and 21 deletions
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19
libc/runtime/ftracer.c
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@ -16,28 +16,14 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/safemacros.internal.h"
#include "libc/calls/calls.h"
#include "libc/fmt/itoa.h"
#include "libc/intrin/cmpxchg.h"
#include "libc/intrin/kprintf.h"
#include "libc/intrin/lockcmpxchgp.h"
#include "libc/intrin/spinlock.h"
#include "libc/log/libfatal.internal.h"
#include "libc/macros.internal.h"
#include "libc/math.h"
#include "libc/nexgen32e/rdtsc.h"
#include "libc/nexgen32e/rdtscp.h"
#include "libc/nexgen32e/stackframe.h"
#include "libc/nexgen32e/x86feature.h"
#include "libc/runtime/memtrack.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/runtime/stack.h"
#include "libc/runtime/symbols.internal.h"
#include "libc/stdio/stdio.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/o.h"
#include "libc/time/clockstonanos.internal.h"
#define MAX_NESTING 512
@ -57,7 +43,6 @@ static struct Ftrace {
int skew;
int stackdigs;
int64_t lastaddr;
uint64_t laststamp;
} g_ftrace;
static privileged int GetNestingLevelImpl(struct StackFrame *frame) {
@ -112,17 +97,14 @@ static privileged inline bool AcquireFtraceLock(void) {
*/
privileged void ftracer(void) {
long stackuse;
uint64_t stamp;
struct StackFrame *frame;
if (AcquireFtraceLock()) {
stamp = rdtsc();
frame = __builtin_frame_address(0);
frame = frame->next;
if (frame->addr != g_ftrace.lastaddr) {
stackuse = (intptr_t)GetStackAddr(0) + GetStackSize() - (intptr_t)frame;
kprintf("%rFUN %5P %'13T %'*ld %*s%t\n", g_ftrace.stackdigs, stackuse,
GetNestingLevel(frame) * 2, "", frame->addr);
g_ftrace.laststamp = X86_HAVE(RDTSCP) ? rdtscp(0) : rdtsc();
g_ftrace.lastaddr = frame->addr;
}
ReleaseFtraceLock();
@ -132,7 +114,6 @@ privileged void ftracer(void) {
textstartup int ftrace_install(void) {
if (GetSymbolTable()) {
g_ftrace.lastaddr = -1;
g_ftrace.laststamp = kStartTsc;
g_ftrace.stackdigs = LengthInt64Thousands(GetStackSize());
g_ftrace.skew = GetNestingLevelImpl(__builtin_frame_address(0));
return __hook(ftrace_hook, GetSymbolTable());