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[Bug translator/10318] Bad address reading arg from mark probe
- From: "mjw at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 24 Jun 2009 09:43:35 -0000
- Subject: [Bug translator/10318] Bad address reading arg from mark probe
- References: <20090623142132.10318.mjw@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From mjw at redhat dot com 2009-06-24 09:43 -------
(In reply to comment #2)> loc2c-test doesn't want to play along though...
> $ ../loc2c-test -e ./uprobesgcc-O0-m32-debug-uprobeslibgcc-O0-m32-debug_exe
> 0x80484c3 arg1
> ../loc2c-test: fetch supported only for base type or pointer
loc2c-test needed to resolve through const and volatile types. I pushed a patch
for that. Now it does play along:
$ ../loc2c-test -e ./uprobesgcc-O0-m32-debug-uprobeslibgcc-O0-m32-debug_exe
0x80484c3 arg1
#define PROBEADDR 0x80484c3ULL
static void print_value(struct pt_regs *regs)
{
intptr_t value;
{
intptr_t addr;
intptr_t frame_base;
{ // DWARF expression: 0x75(8)
{
intptr_t s0;
s0 = fetch_register (5) + 8L;
frame_base = s0;
}
}
{ // DWARF expression: 0x91(-20)
{
intptr_t s0;
s0 = frame_base + -20L;
addr = s0;
}
}
{ int32_t value = deref (4, addr);value = value; }
}
printk (" ---> %ld\n", (unsigned long) value);
return;
deref_fault:
printk (" => BAD ACCESS\n");
}
--
http://sourceware.org/bugzilla/show_bug.cgi?id=10318
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