#17250: Strace: mangled arguments
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Reporter: nephele | Owner: nobody
Type: bug | Status: new
Priority: normal | Milestone: Unscheduled
Component: Applications | Version: R1/Development
Keywords: | Blocked By:
Blocking: | Platform: All
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Observed when trying to debug webkit issues. \\
Info: #16898 \\
hrev 55400
Testcase:
{{{
#include <syscalls.h>
#include <stdbool.h>
int main() {
void* address = NULL;
_kern_map_file("libWebKitLegacy.so.1 mmap area", &address, 0x6,
0x100800000, 0x3, 0x1, true, 0xffffffff, 0x0);
_kern_set_memory_protection(address, 0xff800000, 0x0);
}
}}}
Which results in:
{{{
~ strace ./a.out
[ 18378] image_relocated(0x35296) (53 us)
[ 18378] set_area_protection(0x13d8d4, 0x5) = 0x0 No error (2 us)
[ 18378] set_area_protection(0x13d8d6, 0x5) = 0x0 No error (3 us)
[ 18378] set_area_protection(0x13d8d9, 0x5) = 0x0 No error (3 us)
[ 18378] get_system_info(0x7fd5ce695710) = 0x0 No error (3 us)
[ 18378] get_system_info(0x7fd5ce695520) = 0x0 No error (0 us)
[ 18378] reserve_address_range([0x116e4751b000], 0x7, 0x1000000000) = 0x0
No error (3 us)
[ 18378] create_area("heap", 0x20295f2fca0, 0x1, 0x40000, 0x0, 0x103) =
0x13d8dc (8 us)
[ 18378] resize_area(0x13d8dc, 0x50000) = 0x0 No error (3 us)
[ 18378] resize_area(0x13d8dc, 0x70000) = 0x0 No error (3 us)
[ 18378] open(0xffffffff, "/dev/random", 0x0, 0x0) = 0x3 (7 us)
[ 18378] read(0x3, 0xffffffffffffffff, 0x20295f0b808, 0x8) = 0x8 (2 us)
[ 18378] close(0x3) = 0x0 No error (4 us)
[ 18378] resize_area(0x13d8dc, 0x90000) = 0x0 No error (4 us)
[ 18378] map_file("libWebKitLegacy.so.1 mmap area", 0x7fd5ce695a08, 0x6,
0x100800000, 0x3, 0x1, true, 0x0, 0x0) = 0x13d8dd (7 us)
[ 18378] set_memory_protection(0xf39400e000, 0xff800000, 0x0) = 0x80000000
Out of memory (2 us)
[ 18378] exit_team(0x0) (3 us)
}}}
The interesting part here is: 0xffffffff, while the trace sais 0x0.
It's possible the last two args here for map_file may be swapped aswell,
in the original trace it showed as 0xfffffffff for the last arg, but it
seems to has to be the second to last arg in order to actually work.
{{{
_kern_map_file("libWebKitLegacy.so.1 mmap area", &address, 0x6,
0x100800000, 0x3, 0x1, true, 0xffffffff, 0x0);
[ 18378] map_file("libWebKitLegacy.so.1 mmap area", 0x7fd5ce695a08, 0x6,
0x100800000, 0x3, 0x1, true, 0x0, 0x0) = 0x13d8dd (7 us)
}}}
--
Ticket URL: <https://dev.haiku-os.org/ticket/17250>
Haiku <https://dev.haiku-os.org>
The Haiku operating system.
