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Make some minor fixups to bug reporting, etc.

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This commit is contained in:
Justine Tunney 2022-07-11 05:55:17 -07:00
parent 84764ce7b8
commit 3f015b1e51
31 changed files with 244 additions and 134 deletions
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41
libc/runtime/ftracer.c
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@ -21,6 +21,8 @@
#include "libc/intrin/cmpxchg.h"
#include "libc/intrin/kprintf.h"
#include "libc/intrin/lockcmpxchg.h"
#include "libc/intrin/nopl.h"
#include "libc/intrin/pthread.h"
#include "libc/macros.internal.h"
#include "libc/nexgen32e/stackframe.h"
#include "libc/nexgen32e/threaded.h"
@ -43,9 +45,22 @@ static struct Ftrace {
int skew;
int stackdigs;
int64_t lastaddr;
volatile bool busy;
pthread_mutex_t lock;
volatile bool noreentry;
} g_ftrace;
static void __ftrace_lock(void) {
if (__threaded) {
pthread_mutex_lock(&g_ftrace.lock);
}
}
static void __ftrace_unlock(void) {
if (__threaded) {
pthread_mutex_unlock(&g_ftrace.lock);
}
}
static privileged inline int GetNestingLevelImpl(struct StackFrame *frame) {
int nesting = -2;
while (frame) {
@ -63,18 +78,6 @@ static privileged inline int GetNestingLevel(struct StackFrame *frame) {
return MIN(MAX_NESTING, nesting);
}
static privileged inline void ReleaseFtraceLock(void) {
g_ftrace.busy = false;
}
static privileged inline bool AcquireFtraceLock(void) {
if (!__threaded) {
return _cmpxchg(&g_ftrace.busy, false, true);
} else {
return _lockcmpxchg(&g_ftrace.busy, false, true);
}
}
/**
* Prints name of function being called.
*
@ -85,20 +88,26 @@ static privileged inline bool AcquireFtraceLock(void) {
privileged void ftracer(void) {
long stackuse;
struct StackFrame *frame;
if (AcquireFtraceLock()) {
__ftrace_lock();
if (_cmpxchg(&g_ftrace.noreentry, false, true)) {
frame = __builtin_frame_address(0);
frame = frame->next;
if (frame->addr != g_ftrace.lastaddr) {
stackuse = (intptr_t)GetStackAddr(0) + GetStackSize() - (intptr_t)frame;
stackuse = GetStackAddr() + GetStackSize() - (intptr_t)frame;
kprintf("%rFUN %6P %'13T %'*ld %*s%t\n", g_ftrace.stackdigs, stackuse,
GetNestingLevel(frame) * 2, "", frame->addr);
g_ftrace.lastaddr = frame->addr;
}
ReleaseFtraceLock();
g_ftrace.noreentry = false;
}
__ftrace_unlock();
}
textstartup int ftrace_install(void) {
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&g_ftrace.lock, &attr);
if (GetSymbolTable()) {
g_ftrace.lastaddr = -1;
g_ftrace.stackdigs = LengthInt64Thousands(GetStackSize());