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* Implements backtrace() and a few other functions with the same API as glibc. * Useful for porting linux specific things, and for debugging.
76 lines
2.5 KiB
Plaintext
76 lines
2.5 KiB
Plaintext
From 9618f81449961ea9f5c6d85e45aab86a6b4a16c7 Mon Sep 17 00:00:00 2001
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From: Adrien Destugues <pulkomandy@pulkomandy.tk>
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Date: Thu, 17 Apr 2014 11:06:49 +0200
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Subject: Import FreeBSD patches.
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diff --git a/execinfo.c b/execinfo.c
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index 906fb14..9448b60 100644
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--- a/execinfo.c
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+++ b/execinfo.c
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@@ -69,7 +69,8 @@ backtrace(void **buffer, int size)
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char **
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backtrace_symbols(void *const *buffer, int size)
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{
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- int i, clen, alen, offset;
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+ size_t clen, alen;
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+ int i, offset;
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char **rval;
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char *cp;
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Dl_info info;
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@@ -78,7 +79,6 @@ backtrace_symbols(void *const *buffer, int size)
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rval = malloc(clen);
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if (rval == NULL)
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return NULL;
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- (char **)cp = &(rval[size]);
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for (i = 0; i < size; i++) {
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if (dladdr(buffer[i], &info) != 0) {
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if (info.dli_sname == NULL)
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@@ -92,14 +92,14 @@ backtrace_symbols(void *const *buffer, int size)
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2 + /* " <" */
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strlen(info.dli_sname) + /* "function" */
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1 + /* "+" */
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- D10(offset) + /* "offset */
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+ 10 + /* "offset */
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5 + /* "> at " */
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strlen(info.dli_fname) + /* "filename" */
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1; /* "\0" */
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rval = realloc_safe(rval, clen + alen);
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if (rval == NULL)
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return NULL;
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- snprintf(cp, alen, "%p <%s+%d> at %s",
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+ snprintf((char *) rval + clen, alen, "%p <%s+%d> at %s",
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buffer[i], info.dli_sname, offset, info.dli_fname);
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} else {
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alen = 2 + /* "0x" */
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@@ -108,12 +108,15 @@ backtrace_symbols(void *const *buffer, int size)
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rval = realloc_safe(rval, clen + alen);
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if (rval == NULL)
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return NULL;
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- snprintf(cp, alen, "%p", buffer[i]);
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+ snprintf((char *) rval + clen, alen, "%p", buffer[i]);
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}
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- rval[i] = cp;
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- cp += alen;
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+ rval[i] = (char *) clen;
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+ clen += alen;
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}
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+ for (i = 0; i < size; i++)
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+ rval[i] += (long) rval;
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+
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return rval;
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}
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@@ -155,6 +158,6 @@ backtrace_symbols_fd(void *const *buffer, int size, int fd)
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return;
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snprintf(buf, len, "%p\n", buffer[i]);
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}
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- write(fd, buf, len - 1);
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+ write(fd, buf, strlen(buf));
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}
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}
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--
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1.8.3.4
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