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Perform more low-level code cleanup

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This commit is contained in:
Justine Tunney 2022-09-09 04:07:08 -07:00
parent c32e2d4486
commit 2d17ab016c
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GPG key ID: BE714B4575D6E328
42 changed files with 977 additions and 265 deletions
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13
libc/runtime/ftracer.c
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@ -17,6 +17,7 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/errno.h"
#include "libc/fmt/itoa.h"
#include "libc/intrin/cmpxchg.h"
#include "libc/intrin/kprintf.h"
@ -24,6 +25,7 @@
#include "libc/macros.internal.h"
#include "libc/nexgen32e/gettls.h"
#include "libc/nexgen32e/stackframe.h"
#include "libc/nexgen32e/threaded.h"
#include "libc/runtime/internal.h"
#include "libc/runtime/stack.h"
#include "libc/runtime/symbols.internal.h"
@ -42,6 +44,7 @@
void ftrace_hook(void);
static int g_stackdigs;
static struct Ftrace g_ftrace;
static privileged inline int GetNestingLevelImpl(struct StackFrame *frame) {
int nesting = -2;
@ -52,7 +55,7 @@ static privileged inline int GetNestingLevelImpl(struct StackFrame *frame) {
return MAX(0, nesting);
}
static privileged inline int GetNestingLevel(struct FtraceTls *ft,
static privileged inline int GetNestingLevel(struct Ftrace *ft,
struct StackFrame *sf) {
int nesting;
nesting = GetNestingLevelImpl(sf);
@ -70,9 +73,13 @@ static privileged inline int GetNestingLevel(struct FtraceTls *ft,
*/
privileged void ftracer(void) {
long stackuse;
struct FtraceTls *ft;
struct Ftrace *ft;
struct StackFrame *sf;
ft = (struct FtraceTls *)(__get_tls_privileged() + 0x08);
if (__tls_enabled) {
ft = (struct Ftrace *)(__get_tls_privileged() + 0x08);
} else {
ft = &g_ftrace;
}
if (_cmpxchg(&ft->once, false, true)) {
ft->lastaddr = -1;
ft->skew = GetNestingLevelImpl(__builtin_frame_address(0));